Dual Hydrogen Control Panel (DHCP) · HA0156P01 Rev. D 6 Introduction Modern high capacity turbine generators use hydrogen gas as a cooling medium. Two reasons for using hydrogen

Dual Hydrogen Control Panel (DHCP)

Installation and Operation Manual

HA0156P01 Rev. D120V & 220V Bottom Entry

DETECTION SYSTEMS

1 HA0156P01 Rev. D

ContentsIntroduction ..................................................................................................................................... 6

Specifications .................................................................................................................................. 7

System Description ......................................................................................................................... 8Gas Analyzers (Sensor Cells QT-290A, QT-290B, Controller PCB HD0039G01, I/O PCBHD0043G01, Display PCB HD0138G03) ................................................................................... 8Control/Display Panel ................................................................................................................ 9Sensor Cell Assembly ................................................................................................................. 9Flow Indicators with Metering Valves (FI-2971, FI-2972) .......................................................... 9Total Gas Flowmeter (FI-2973) .................................................................................................. 9Differential Pressure Gage (PDI-292) ....................................................................................... 10Differential Pressure Transmitter (PDT-292) ............................................................................ 10Purifiers ................................................................................................................................... 10Moisture Indicators (MI-2971, MI-2972, MI-2973) ................................................................... 10Metering Valves (HO-2971, HO-2972, HO-2973, HO-2974) ...................................................... 10

Installation .................................................................................................................................... 11Cabinet Mounting .................................................................................................................... 11Lifting ...................................................................................................................................... 11Electrical Connections ............................................................................................................. 11Contacts/Signals ...................................................................................................................... 12Circuit Protection ..................................................................................................................... 12

System Operation ......................................................................................................................... 13DHCP Initialization .................................................................................................................. 13Flow Calibration ...................................................................................................................... 14Gas Calibration ....................................................................................................................... 14Normal Operation .................................................................................................................... 15Purge Operation ....................................................................................................................... 16Mode Menu .............................................................................................................................. 16Cell Output Voltages ................................................................................................................ 18

Maintenance ................................................................................................................................. 19Daily ........................................................................................................................................ 19Weekly...................................................................................................................................... 19Every Six Months ..................................................................................................................... 19When the Generator is Down ................................................................................................... 19

Component Replacement Instructions .......................................................................................... 20Removing a Gas Analyzer Sensor ............................................................................................. 20Removing a Processor Circuit Board ........................................................................................ 20Removing the Input/Output (I/O) Circuit Board ......................................................................... 21Removing Solenoid Valves Coils ............................................................................................... 21

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Removing Moisture Indicators .................................................................................................. 21Removing Gas Purifiers ........................................................................................................... 22Removing Flow Meters............................................................................................................. 22

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FiguresFigure 1 - DHCP Outline ............................................................................................................................. 25Figure 2 - DHCP Main Junction Box, Internal Component ........................................................................... 27Figure 3 - Customer Interface Connections ................................................................................................. 28Figure 4 - DHCP Wiring Diagram ............................................................................................................... 29Figure 4a - DHCP Wiring Diagram ............................................................................................................. 31Figure 5 - DHCP Piping Schematic ............................................................................................................. 33Figure 6 - Analyzer Status ........................................................................................................................... 35Figure 7 - DHCP Display ............................................................................................................................ 36Figure 8 - DHCP Display Descriptions ........................................................................................................ 37Figure 9 - DHCP Status .............................................................................................................................. 38Figure 10 - DHCP Customer Contacts ........................................................................................................ 39Figure 11 - Valve/Switch Configuration, Normal % H2 in Air ....................................................................... 40Figure 12 - Valve/Switch Configuration, Purge % H2 in CO2 ....................................................................... 40Figure 13 - Valve/Switch Configuration, Purge % Air in CO2 ...................................................................... 41Figure 14 - Valve/Switch Configuration, Case .............................................................................................. 41Figure 15 - Valve/Switch Configuration, Confirmation Mode, Turbine End .................................................... 42Figure 16 - Valve/Switch Configuration, Confirmation Mode, Collector End.................................................. 42Figure 17 - Valve/Switch Configuration, Calibrate N2 (Both Analyzers) ....................................................... 43Figure 18 - Valve/Switch Configuration, Calibrate CO2 (Both Analyzers) .................................................... 43Figure 19 - Valve/Switch Configuration, Calibrate H2 (Both Analyzers) ....................................................... 44Figure 20 - Valve/Switch Configuration, Calibrate N2 (Turbine End) ............................................................ 44Figure 21 - Valve/Switch Configuration, Calibrate N2 (Collector End) .......................................................... 45Figure 22 - Valve/Switch Configuration, Calibrate CO2 (Turbine End) .......................................................... 45Figure 23 - Valve/Switch Configuration, Calibrate CO2 (Collector End) ....................................................... 46Figure 24 - Valve/Switch Configuration, Calibrate H2 (Turbine End) ............................................................ 46Figure 25 - Valve/Switch Configuration, Calibrate H2 (Collector End) .......................................................... 47Figure 26 - Parts List ................................................................................................................................... 48

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Dual Hydrogen Control Panel (DHCP) SystemImportant Information

THIS EQUIPMENT OPERATES AT VOLTAGE LEVELS THAT CAN BE HAZARDOUS TOPERSONNEL. READ THE SECTION ABOUT SAFETY CONSIDERATIONS BEFOREINSTALLING OR SERVICING.

THESE INSTRUCTIONS DO NOT PURPORT TO COVER ALL DETAILS OR VARIATIONSIN EQUIPMENT NOR TO PROVIDE FOR EVERY POSSIBLE CONTINGENCY TO BE METIN CONNECTION WITH INSTALLATION, OPERATION OR MAINTENANCE.

SHOULD FURTHER INFORMATION BE DESIRED, OR SHOULD PARTICULAR PROB-LEMS ARISE THAT ARE NOT COVERED SUFFICIENTLY FOR THE PURCHASER’SPURPOSES, REFER THE MATTER TO ENVIRONMENT ONE CORPORATION.

IT IS THE RESPONSIBILITY OF SITE MANAGEMENT TO ASSURE THAT ONLYTRAINED/QUALIFIED PERSONNEL OPERATE AND/OR SERVICE THIS EQUIPMENT.

Dual Hydrogen Control Panel (DHCP) SystemSafety Considerations

THE SYSTEM ELECTRONICS ENCLOSURE AND CUSTOMER INTERFACEENCLOSURE CONTAIN 115 AND OR 230 VOLTS AC. THIS VOLTAGE APPEARS AT THEAC POWER STRIP AND VARIOUS OTHER POINTS. EQUIPMENT OPERATIONINVOLVES A FLAMMABLE GAS (HYDROGEN) UNDER PRESSURE. APPROPRIATEMEASURES MUST BE TAKEN TO PREVENT LEAKS AND AVOID SOURCES OFIGNITION.

ALL ELECTRICAL CONNECTIONS BETWEEN THE SYSTEM ELECTRONICS,CUSTOMER INTERFACE AND DISPLAY/CONTROL PANEL SHOULD BE TESTED ANDVERIFIED TO BE CORRECT.

ALL WIRING MUST BE IN ACCORDANCE WITH LOCAL CODE AND/OR CENELECSTANDARD EN50014.

ALL GAS CONNECTIONS TO THE PANEL MUST BE LEAK CHECKED PRIOR TOAPPLYING AC POWER.

CHECK FOR LEAKS AT ALL TUBING AND MECHANICAL CONNECTIONS. IF LEAKSARE FOUND, DETERMINE THE CAUSE AND REPAIR. REPEAT THE LEAK CHECKUNTIL THE PANEL IS DETERMINED TO BE LEAK TIGHT.

6HA0156P01 Rev. D

Introduction

Modern high capacity turbine generators use hydrogen gas as a cooling medium. Tworeasons for using hydrogen are 1) hydrogen has the best heat transfer characteristics of anygas; and 2) the low atomic weight of hydrogen makes it the lightest and, therefore, has thelowest density of any stable gas (10 percent that of air at a purity of 98 percent), resulting inthe lowest windage losses.

The hydrogen auxiliary system exists to maintain the quality and quantity of cooling gasrequired to ventilate the conducting and rotating parts of hydrogen cooled generators. Glandseals are used to prevent hydrogen leakage through the clearance between the shaft andthe frame.

In order to maintain hydrogen gas purity of approximately 98 percent, some generators usea seal gland system, where a small quantity of hydrogen gas is continuously scavengedfrom two (collector end and turbine end) seal drain enlargements and discharged into theatmosphere.

The Dual Hydrogen Control Panel (DHCP) contains two independent Generator Gas Analyz-ers (GGA’s) and circuitry to control the rate of scavenging in order to maintain high gaspurity. Environment One’s microprocessor-controlled Generator Gas Analyzer (GGA), withits triple-range sensor cell, is capable of measuring 70 to 100 percent H2 in Air, 0 to 100percent H2 in CO2 and 0 to 100 percent Air in CO2.

Each GGA continuously analyzes the generator cooling gas, displays gas purity in real timeand has a corresponding 4 to 20 mA output. In the event that the gas purity falls to a warn-ing or alarm level, a visual indication is given and alarm contacts are switched.

The GGA’s triple-range sensor cell also monitors purge gases used during generator shut-down and maintenance. Purge gas purity is displayed and a corresponding 4 to 20 mAoutput is provided for H2 in CO2 or Air in CO2.

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Specifications

Input Voltage 120 Vac 50/60 Hz220 Vac 50/60 Hz

Ambient Temperature 32 F to 125 F (0 C to 52 C)

Maximum Pressure 100 psi

Ambient Location Class 1, Division 1, Group B

Gas Analyzer Switchable — Triple RangeSensing Unit (70-100% H2 in Air)

(0-100% H2 in CO2)(0-100% Air in CO2)

Accuracy +/- 1% of full scale @ 80-100% H2 in Air

Outputs 4-20 mA current output

Alarm Levels Alarm and warning levels are adjustable

Relay Contact Rating 30V/1A DC 120V/0.5A AC125V/0.005A (Resistive) DC

Data Retention Lithium battery-supported RAM10 years minimum

Indicators AC power, Trouble, Normal (H2 in Air),Purge (H2 in CO2), Purge (Air in CO2),Calibrate H2, Calibrate CO2, Calibrate N2,One 3-character LED numeric displays,One 16-character LCD display

Weight 475 lbs (standard)1,100 lbs (NEMA 3R)

Dimensions 17” d x 64 3/4” h x 36” w (standard)27.5” d x 72” h x 42” w (NEMA 3R)

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System Description

The Dual Hydrogen Control Panel (DHCP) is designed for use on hydrogen-cooled genera-tors. It is designed to operate in Class 1, Division 1, Group B hazardous areas. The DHCPanalyzes and, in real time, displays the hydrogen gas purity on built-in numeric displays.Environment One’s GGA can be supplied as an Ex, CE labeled system for Zone 1 environ-ments. Contact Environment One for details.

The major components of the DHCP include:

• 2 completely independent, generator gas analyzers (GGA)

• 2 hydrogen gas flow indicators with metering valves

• 1 total hydrogen gas flow indicator

• 1 fan differential pressure transmitter and gage

• 3 hydrogen gas purifiers

• 3 moisture indicators

• 4 metering valves

• Numerous isolation valves

• 2 local display panels that indicate gas purity and specific operating conditions

Gas Analyzers (Sensor Cells QT-290A, QT-290B, Controller PCBHD0039G01, I/O PCB HD0043G01, Display PCB HD0138G03)

Analyzers and their printed circuit boards (PCBs) are interchangeable. Each analyzer iscomprised of a sensing unit, controller PCB, sensor cells and input/output (I/O) PCB. AllPCB’s are housed in the main junction box (Figure 1); local display panels are mounted onthe front of the panel (Figure 1).

Each analyzer independently provides purity monitoring, calibration, mode selection, sensorunit control, alarm electronics, data logging, system inputs/outputs and sensing unitlinearization. See Figure 8 for display panel features and functions.

Fail-safe operation of the Gas Analyzers is ensured by:

1. On power-up the GGA must execute and pass qualifying self tests. Failure in any testresults in termination of operation and annunciation of the condition causing the failure.

2. Following power-up and/or system reset, the GGA is continuously supervised by anindependent watchdog monitor that serves to reset it should its operation becomeerratic.

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3. The GGA is completely self-supervised and continuously checks itself for legal processorfunctioning, internal voltages, analog-to-digital conversion accuracy, integrity of cablingand relay operation. Any faults are immediately annunciated as “trouble” on the displayand accompanied by a change in the corresponding relay state.

See Analyzer Failure for more information.

Control/Display Panel

The Control/Display Panel provides control of all functions of the GGA as well as completeannunciation of the status of the GGA (Figure 7). Functions are accessed by means of afour-button membrane-switch keypad and 16-character Liquid Crystal Display (LCD). Gener-ally, pressing the Fn (Function) key causes the LCD to continuously scroll the names of theGGA’s available functions. A function may then be accessed by pressing the ENTER keywhen the function name appears. To signal confirmation, the function name flashes briefly.

The Display Panel provides Light Emitting Diodes (LEDs) to annunciate the Normal (H2 inair), Purge (H2 in CO2 and air in CO2), and Calibrate (H2, CO2 and N2) GGA states. In addi-tion, they indicate Warning, Alarm and Trouble conditions. A green LED indicates AC Power.It is important to understand that, should the GGA go into either Warning and/or Alarm,it will lock into continuous monitoring of the gas stream. No other function can beaccessed unless the Alarm/Warning Reset key is first pressed.

To permit a system level initialization (“cold start”), a momentary push-button, located behindthe Display Panel (Figure 7) in the upper right hand corner, may be pressed. Since allcalibration constants are stored in non-volatile memory, these values will not be lost shouldthe system be initialized or should it lose, then regain, AC power.

Sensor Cell Assembly

The sensor cell assembly is comprised of a sampling thermistor and a reference thermistor— both operated at very low power in a self-heated mode — embedded in a temperature-regulated cell block. Gas purity is derived as a function of the thermal conductivity of the gasmixture to the heat output of the thermistors under known constraints. See Cell OutputVoltages for a detailed description for the sensor cell.

Flow Indicators with Metering Valves (FI-2971, FI-2972)

Two low-flow gas indicators with needle metering valves are used to adjust the hydrogen gasflow through each sensing unit (Analyzer 1 and Analyzer 2, Figure 1). Both have a direct readscale with a range of 90 to 900 cc/min, calibrated with hydrogen.

Note: Flow indication changes with different gases. For hydrogen, the flow should be set for500 cc/min.

Total Gas Flowmeter (FI-2973)

A high flow gas indicator is used to indicate the scavenging flows (Total Flow, Figure 1). Thehigh flow gas indicator has a direct read scale with a range of 540 to 5,400 cc/min whencalibrated with hydrogen.

Note: Flow indication changes with different gases. Metering valves adjust the flow of thecollector end low flow, collector end high flow, turbine end low flow and turbine end highflow. See Flow Calibration for flow settings.

(Gas Analyzers cont’d)

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Differential Pressure Gage (PDI-292)

A differential pressure gage measures the generator fan differential pressure (FanDifferential, Figure 1). The standard differential pressure gage has dual scales with ranges of0 to 30 inches H2O and 0 to 76.2 gm/cm2. Some units may be equipped with special gagescales.

Differential Pressure Transmitter (PDT-292)

A differential pressure transmitter provides an output signal corresponding to the generatorfan differential pressure (Figure 1). This 4 to 20 mA output is externally provided by theMark V and corresponds to 0 to 30 inches H2O. Some units may be equipped with a specialrange.

Purifiers

Three gas purifiers remove foreign matter from the hydrogen stream (Turbine End Purifier,Case Purifier, Collector End Purifier; Figure 1). Removal of oil, water and particles above 12microns is accomplished through the use of molecular sieve materials and special filters.The filters are available in replaceable cartridges, HA0139P02.

Moisture Indicators (MI-2971, MI-2972, MI-2973)

Three moisture indicators indicate the downstream presence of moisture in the hydrogenstream (Turbine End Moisture, Collector End Moisture, Case Moisture; Figure 1). The unitsare supplied with a dyed silica gel, which gradually changes from blue (at relative humidityless than 4 percent) to pink (at relative humidity higher than 40 percent). These devices arereplaceable.

Metering Valves (HO-2971, HO-2972, HO-2973, HO-2974)

Four needle metering valves provide adjustment for the scavenging flow rates (CollectorEnd Low Flow, Turbine End Low Flow, Collector End High Flow, Turbine End High Flow;Figure 1). See Flow Calibration for flow settings.

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Installation

Follow the installation instructions to ensure proper installation of the equipment. The exactlocation of the DHCP should be in accordance with the recommendations made by GeneralElectric or its authorized representative.

Cabinet Mounting

Choose a location that is not subject to extremes of dust, temperature, vibration or shock.The panel should be accessible for service, with adequate clearance to open the enclosureand display panel doors (Figure 1). The DHCP has four foundation bolt openings (Figure 1).The openings allow you to insert four 5/8-inch bolts for securing the panel to the floor. Thebolts are isolated from the panel through the use of compression vibration insulators. Usefasteners that are compatible with the mounting surface and able to support the weight ofthe panel. Lifting bolts at the top of the panel allow for easy connection to overhead cranes.

Lifting

The DHCP should be lifted by the pair of eye bolts provided at the top of the frame.

Electrical Connections

Prior to applying power to the DHCP unit, ensure that the local power source matches thepower rating on the DHCP nameplate.

The DHCP unit is shipped with all isolation and metering valves closed. All gas lines must beconnected to the DHCP and leak-tested before continuing.

Electrical connections are made through four 3/4-inch male conduit unions at the bottom ortop of the panel (Figure 1). System power requirements are 120 or 220 Volts AC (systemsare supplied for specifically 120 V or 220 V). The AC power source should be reliable andnot subject to severe transients. Total load max.: 400 watts.

Electrical connections, located inside of the main junction box, are accessed by removing 323/4” hex captive bolts. Two guide studs are provided for assistance in removal/replacement.

CAUTION! Do not scratch sealing surfaces on the main junction box. The mainjunction box lid weighs 50 lbs (22.7 kg). Take precautions during removal. Prior toopening the main junction box, remove power from the DHCP and ensure the systemis free of hydrogen.

Wire routing should be in accordance with Figure 3 or 4. This ensures that noise generatedfrom the AC power and contacts does not interfere with the signals. Connections are madeto barrier type terminal strips (Figure 3).

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Contacts/Signals

The DHCP includes alarm and status relays (Figures 3, 9, 10). They are:

• Warning Relay Both a normally open and a normally closed contact (single pole, doublethrow configuration) is provided and a warning is signaled by an energized relay.

• Alarm Relay Both a normally open and a normally closed contact (single pole, doublethrow configuration) is provided and an alarm is signaled by an energized relay.

• Trouble Relay Both a normally open and a normally closed contact (single pole, doublethrow configuration) is provided and Trouble is signaled by an energized relay.

• 4-20 mA output signals are provided for Analyzer #1, Analyzer #2 and the DP Transmit-ter (Figure 3).

• The 4-20 mA signals for Analyzer #1 and Analyzer #2 correspond to 70 to 100 percent inNormal mode (H2 in air) and 0 to 100 percent in Purge modes (H2 and CO2 & Air in CO2).

• Analyzer #1 and Analyzer #2’s output signals are internally powered. These signalsare not to be powered by the Mark V, Mark VI.

• The 4-20 mA signal for the DP Transmitter is powered by the Mark V, Mark VI.

See Figure 3 for locations of signals on terminal block. See Figures 9 and 10 for descriptionof conditions where relays are activated.

Circuit Protection

Each GGA is individually fused. A half-amp slo-blo fuse, located on the Input/Output PCB,provides circuit protection.

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System Operation

The DHCP’s main purpose is to analyze and display the hydrogen gas purity of hydrogencooled generators. This section describes system operation.

DHCP Initialization

With system power on, press the RESET push-button on the backside of the DISPLAYPANEL (Figure 7). Reset each of the two gas analyzer units separately.

The GGA will perform several self tests and, if they are successful, the DISPLAY PANEL willrespond with (a) all discrete LEDs lit; (b) all segments and the tenths place decimal point ofthe GAS PURITY display lit; and (c) all pixels of the LCD display on. Within several seconds(a) all discrete LEDs, except the AC POWER and TROUBLE LEDS, will turn off; (b) allsegments, except the tenths place decimal point of the GAS PURITY display will turn off;and (c) the display will indicate LINKING …, as the DISPLAY PANEL initiatescommunication with the rest of the system. Communication should be established withinseveral seconds and the LCD display will then echo the results of cold-start initialization:

• GGA ANALYZER READY

• INITIALIZING …

• 12 BIT ADC …

• … CALIBRATED Note: If calibration is unsuccessful then the LCD will display 12 BITADC ERROR. After annunciating TROUBLE, the processor will be stopped because, atthis point in the start-up sequence, this condition is a fatal error. Contact EnvironmentOne at (518) 346-6161.

• 8 BIT ADC …

• … CALIBRATED Note: If calibration is unsuccessful then the LCD will display 8 BITADC ERROR. After annunciating TROUBLE, the processor will be stopped because, atthis point in the start-up sequence, this condition is a fatal error. Contact EnvironmentOne at (518) 346-6161.

• Iout SET TO 4 mA where Iout is the 4-20 mA GGA output. See below.

• Tcell = XX.X 0C (where XX.X is the instantaneous cell block temperature). For an inde-terminate period (normally not exceeding 15 minutes for a cold start), the LCD willdisplay the real-time temperature of the sensor cell block. When the temperature rises to55.0 C +/- 0.5 C, the system will advance and the display will indicate:

• ANALYZER READY After this last message, all discrete LEDs will go out except ACPOWER and TROUBLE. In response to the prompts NORMAL (H2/AIR), CONFIGUREVALVES, permit the sample gas to flow through the sensor then press the ENTER key.This is the NORMAL mode of operation. See Normal for more information.

For a first time installation, it is essential that a gas sensor calibration be performed on thesystem. Also, the faults log should be cleared. See System for more information.

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Flow Calibration

Refer to Figure 5 for piping component location and Figures 11 through 25 for valve configu-rations.

With the DHCP system in normal operation, manually close all isolation valves and meteringvalves.

Set CE low flow. Open isolation valve HV-2973. Adjust the collector end low flow meteringvalve HO-2974 for a flow setting of approximately 1000 SCCM at total flow meter FI-2973.

Set CE high flow. While Mark V is energizing FY-2973, adjust the collector end high flowmetering valve HO-2973 for a total flow of approximately 2000 SCCM at total flow meter FI-2973. After adjustment is made, ensure that FY-2973 is de-energized by the generatorcontrol system (Mark V).

Set Cell #2 flow. Open isolation valves HV-2974, HV-2982 and HV-2981; adjust the flowmeter/metering valve FI-2972 for a flow of approximately 500 SCCM. Total flow meter FI-2973 should indicate approximately 1500 SCCM. Close HV-2973, HV-2974, HV-2982 andHV-2981.

Set TE low flow. Open isolation valve HV-2971. Adjust the turbine end low flow meteringvalve HO-2972 for a flow setting of approximately 1000 SCCM at total flow meter FI-2973.

Set TE high flow. While Mark V is energizing FY-2971, adjust the turbine end high flowmetering valve HO-2971 for a total flow of approximately 2000 SCCM at total flow meter FI-2973. After adjustment is made, ensure that FY-2971 is de-energized by the generatorcontrol system (Mark V).

Set Cell #1 flow. Open isolation valves HV-2972, HV-2979 and HV-2980. Adjust the indica-tor/metering valve FI-2971 for a flow of approximately 500 SCCM. Total flow meter FI-2973should indicate approximately 1500 SCCM.

Open HV-2973, HV-2974, HV-2982 and HV-2981. Total flow meter FI-2973 should indicateapproximately 3000 SCCM.

Gas Calibration

Calibrate each of the two gas analyzer units separately.

Press the Fn key on the GGA. Wait until the display scrolls to the prompt GASCALIBRATION then press the ENTER key. The display will scroll the prompts CALIBRATEH2, CALIBRATE CO2 and CALIBRATE N2. Wait until the display scrolls to the promptCALIBRATE H2 then press the ENTER key. In response to the prompts CALIBRATE H2,CONFIGURE VALVES, permit the hydrogen calibration gas to flow through the sensor. Withthe calibration gas flowing the LCD will display the voltage output of the reference cellsensor in the format Vref=X.XXX VDC. Press the Fn key to cancel the calibration at thispoint, if desired; this will permit a return to the main menu. If desired to continue thecalibration, observe the reference voltage and, if it appears stable (i.e., a final change of notgreater than 1 to 2 mV per minute), press the ENTER key.

The LCD will display the voltage output of the sample cell sensor in the format“Vcell=X.XXXVDC.” Again, the calibration may be terminated by pressing Fn. If it is

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continued, observe the sample cell voltage as it adjusts to the flowing H2 calibration spangas. When it appears stable (i.e., a final change of not greater than 1 mV per minute, whichoccurs within approximately 15 minutes) press the ENTER key. The LCD will display H2

CALIBRATED. This concludes H2 calibration.

The display will scroll the prompts CALIBRATE H2, CALIBRATE CO2 and CALIBRATE N2.Press the Fn key on the GGA to return to the main menu or to continue gas calibration, waituntil the display scrolls to the prompt CALIBRATE CO2 and press the ENTER key. Inresponse to the prompts CALIBRATE CO2, CONFIGURE VALVES, permit the CO2

calibration gas to flow through the sensor. With the calibration gas flowing the LCD willdisplay the voltage output of the reference cell sensor in the format Vref=X.XXX VDC. Ifdesired to cancel the calibration at this point, press the Fn key; this will permit a return to themain menu. If desired to continue the calibration, observe the reference voltage and, if itappears stable (i.e., a final change of not greater than 1 to 2 mV per minute), press theENTER key.

The LCD will display the voltage output of the sample cell sensor in the format Vcell=X.XXXVDC. Again, the calibration may be terminated by pressing Fn. If it is continued, observe thesample voltage as it adjusts to the flowing CO2 calibration zero gas. When it appears stable(i.e., a final change of not greater than 1 to 2 mV per minute, which occurs withinapproximately 15 minutes), press the ENTER key. The LCD will display CO2 CALIBRATED.This concludes CO2 calibration.

The display will scroll the prompts CALIBRATE H2, CALIBRATE CO2 and CALIBRATE N2.Press the Fn key on the GGA to return to the main menu, or to continue gas calibration, waituntil the display scrolls to the prompt CALIBRATE N2, press the ENTER key. In response tothe prompts CALIBRATE N2, CONFIGURE VALVES, permit the nitrogen calibration gas toflow through the sensor. With the calibration gas flowing the LCD will display the voltageoutput of the reference cell sensor in the format Vref=X.XXX VDC. If desired to cancel thecalibration at this point, press the Fn key; this will permit a return to the main menu. Ifdesired to continue the calibration, observe the reference voltage and, if it appears stable(i.e., a final change of not greater than 1 to 2 mV per minute) press the ENTER key.

The LCD will display the voltage output of the sample cell sensor in the format Vcell=X.XXXVDC. Again, the calibration may be terminated by pressing Fn. If it is continued, observe thesample voltage as it adjusts to the flowing N2 calibration zero/span gas. When it appearsstable (i.e., a final change of not greater than 1 to 2 mV per minute, which occurs withinapproximately 15 minutes) press the ENTER key. The LCD will display N2 CALIBRATED.This concludes N2 calibration.

Press the Fn key to return to the main menu. This concludes the gas sensor calibration ofthe GGA system.

Normal Operation

Note: It is important to verify the lines connecting LE025 to the turbine-end seal drainenlargement, LE026 to the collector-end seal oil enlargement and LE028 to the case fanpressure are filled with hydrogen before placing the system in Normal operation.

NORMAL operation of the GGA system can be accessed by first pressing the Fn key toaccess the main menu and, then, pressing the ENTER key when the display scrolls to theprompt NORMAL (H2 in Air). In response to the prompts NORMAL (H2 in Air), CONFIGUREVALVES, permit the sample gas to flow through the sensor then press the ENTER key. In

(Gas Calibration Cont’d)

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the NORMAL mode of operation the GGA can respond to both WARNING and ALARM levels.Both levels are programmable (see SETTINGS, above, for detailed information). The 4-20mA current output of the GGA corresponds to 70 to 100 percent gas purity and the GGAmust remain below the WARNING or ALARM level for a minimum of one minute to generatean alarm. Should the GGA go into WARNING, it will energize the WARNING RELAY (Figure 3)and illuminate the WARNING LED. Further system operation is locked out until the WARNINGRESET key is pressed (at which point the GGA will revert to NORMAL operation).

Purge Operation

To monitor a purge operation, first press the Fn key to access the main menu, and thenpress ENTER when the display scrolls to the prompt PURGE (H2 in CO2) or PURGE (Air inCO2) key. In response to either the prompt PURGE (H2 in CO2) or PURGE (Air in CO2),CONFIGURE VALVES, permit the sample gas to flow through the sensor then press theENTER key. The Display Panel will respond with the corresponding PURGE (H2 in CO2) orPURGE (Air in CO2) LED illuminated. In this mode the 4 to 20 mA current output of eachGGA corresponds to 0 to 100 percent gas purity. There is no alarm level for either of thePURGE operations.

Mode Menu

The following items are available by pressing the Fn key:

• NORMAL (H2/AIR) This item, when displayed, can be selected by pressing the ENTERkey. See Normal Operation for more information.

• PURGE This item, when displayed, can be selected by pressing the ENTER key. SeePurge Operation for more information.

• GAS CALIBRATION This item, when displayed, can be selected by pressing theENTER key. See Gas Calibration for more information.

• SETTINGS This item, when displayed, can be selected by pressing the ENTER key. Ifselected, two sub-items will be displayed: ALARM LEVEL and WARNING LEVEL. Thesesub-items permit adjustment of the levels at which system alarm and warning areannunciated. To adjust the ALARM LEVEL, press the ENTER key when this sub-itemappears. The LCD will display the current purity level (in percent purity) at, or abovewhich, the system will annunciate an alarm condition. This value can be adjusted, byusing the UP ARROW and DOWN ARROW keys, between 80 percent and 1 percentless than the setting for the warning level. The new level can be selected by pressing theENTER key. The new level will not be selected if the Fn key is pressed instead. Toadjust the WARNING LEVEL, press the ENTER key when this sub-item appears. TheLCD will display the current purity level (in percent purity) at, or above which, the systemwill annunciate a warning condition. This value can be adjusted, by using the UPARROW and DOWN ARROW keys, between 1 percent more than the setting for thealarm level and 99.9 percent. The new level can be selected by pressing the ENTERkey. The new level will not be selected if the Fn key is pressed instead. The system willnot permit the alarm and warning levels to have the same value; it will also not permitthe alarm level to be higher than the warning level.

• SYSTEM This item, when displayed, can be selected by pressing the ENTER key. Ifselected, five sub-items will be displayed: “MONITOR Tcell,” “SHOW FAULTS LOG,”

(Normal Operation Cont’d)

17 HA0156P01 Rev. D

“CLEAR FAULTS LOG,” “RUN DIAGNOSTICS” and “SHOW PROGRAM ID.” Pressingthe ENTER key when a sub-item appears selects that sub-item.

Selecting the sub-item MONITOR Tcell permits a real time readout of the temperature of thegas sensor cell. Press the Fn key to terminate.

The GGA is a self-supervised system and can identify and trap detected faults in its opera-tion. Whenever a fault is detected the TROUBLE LED is illuminated, the TROUBLE RELAYis de-energized, and a description of the fault is logged (stored and latched). Faults can bedisplayed by pressing the ENTER key when the sub-item SHOW FAULTS LOG is displayed.Fault conditions that can be detected include errors in the system’s 8- and 12-bit analog-to-digital converters, power supply voltages, supervisory loop errors and gas sensor cell blocktemperature. Press the Fn key to terminate.

The faults log can be erased by pressing the ENTER key when the sub-item CLEARFAULTS LOG is displayed. If selected, the LCD will prompt CLEAR LOG? Press the ENTERkey to clear all logged faults. Once executed the display will indicate LOG CLEARED forapproximately two seconds and then go blank, leaving the system in the NORMAL mode.Pressing the Fn key instead will blank the display and place the system in the NORMALmode without clearing the faults.

Pressing the ENTER key when the sub-item RUN DIAGNOSTICS is displayed permits areadout of the GGA’s initial cell reference voltage, the output voltages of all power supplies,tests the system’s Normal, Trouble, Alarm and Warning relays, and the Membrane Keypadon the Display Panel. At any point press Fn to terminate testing. The test sequence is:

1. The LCD will display Vref=X.XXXVDC. This parameter is the voltage of the cellreference thermistor and was stored at the time of the last calibration of the cell (whetherH2, CO2 or N2).

2. The LCD will display Vh2=X.XXXVDC. This parameter is the voltage of the hydrogencalibration constant and was stored at the time of the last calibration of the cell.

3. The LCD will display Vco2=X.XXXVDC. This parameter is the voltage of the carbondioxide calibration constant and was stored at the time of the last calibration of the cell.

4. The LCD will display Vn2=X.XXXVDC. This parameter is the voltage of the nitrogencalibration constant and was stored at the time of the last calibration of the cell.

5. The LCD will display Vadc> X.XXVDC. This parameter is the reference voltage of the 12bit analog-to-digital converter and will range between 3.97 and 4.22 VDC.

6. The LCD will display +5V> X.XXVDC. This parameter is the output of the +5 volt digitalsupply and will range between 4.50 and 5.50 VDC.

7. The LCD will display +12V> XX.XVDC. This parameter is the output of the +12 voltdigital supply and will range between 10.8 and 13.2 VDC.

8. The LCD will display +15V> XX.XVDC. This parameter is the output of the +15 voltanalog supply and will range between 13.5 and 16.5 VDC.

9. The LCD will display ”-15V> XX.XVDC. This parameter is the output of the -15 voltanalog supply and will range between -13.5 and -16.5 VDC.

(Mode Menu Cont’d)

18HA0156P01 Rev. D

For the above voltages, the LCD will flash an ERROR message alternately with thevoltage if the measured voltage is out of limit.

10. The LCD will display “RELAY TEST …” The system will cause each relay to beenergized. If no errors are detected, the LCD will display” RELAYS PASS.” If an error isdetected, the LCD will display “RELAYS FAIL,” “FAILURE IN,” then “NORMAL RELAY,”“TROUBLE RELAY,” “ALARM RELAY” or “WARNING RELAY.”

11. The LCD will display “KEYPAD TEST …” Press each key on the Membrane Keypad onthe DISPLAY PANEL, reserving the ENTER key for last (this key will terminate the test).As each key is pressed the LCD will echo the name of the key.

Program instructions for the microcontroller within the GGA system are stored in Read OnlyMemory (ROM) chips located within the system. The program identification and revisionlevel, in the format P_GGA Rev X.X, can be displayed by pressing the ENTER key when thesub-item SHOW PROGRAM ID is displayed. Pressing the Fn key terminates this item.

REMINDER! Should the system go into trouble, access the menu items SHOWFAULTS LOG and RUN DIAGNOSTICS for more information.

Cell Output Voltages

The sensor cell is principally comprised of a sampling thermistor and a reference thermistorembedded in a temperature regulated cell block. The voltage derived from the referencethermistor (this voltage is displayed as “cr”) is used to compensate for any non-purity relatedvariations in the voltage output of the sample thermistor (this voltage is displayed as “s”).When a cell is calibrated, the value of cr is stored in non-volatile memory as the parameterVref. Subsequently, during normal operation, the real time value of cr is mathematicallycombined with Vref to form a term compensating s. This operation ensures long-term mea-surement accuracy of the sensor cell.

The output voltages of these thermistors can be viewed directly (i.e., prior to any computa-tion) in real time by pressing the UP arrow. This information is updated every half secondand is displayed in the format s=X.XXX cr=X.XXX, where, again, s stands for the samplethermistor voltage and cr stands for the current value of the reference thermistor voltage.The display of these voltages may be canceled at any time by pressing the DOWN arrow.The parameter Vref is displayed during calibration and diagnostics.

(Mode Menu Cont’d)

19 HA0156P01 Rev. D

Maintenance

The Dual Hydrogen Control Panel (DHCP) is designed for reliable, trouble-free operation.Periodic checks and maintenance are easy. Following the required maintenance checks willensure safe trouble free operation of this equipment.

Daily

Check and adjust DHCP analyzer and scavenging flow rates. See Flow Calibration. Checkhydrogen purity.

Weekly

1. Visually inspect the moisture indicators. A blue medium indicates dry hydrogen, while apink medium indicates excessive moisture in the hydrogen gas sample that may affectthe stability of the Generator Gas Analyzers. Replace or regenerate the MoistureIndicator and replace the Gas Purifier if the medium is pink. Refer to Removal ofMoisture Indicators and Gas Purifiers.

2. Blow down purifiers by first removing cap at the base of the isolation valve and thenopen the valve itself. It is advisable to have a container available to collect any fluidcontained within the purifier. CAUTION: THE PURIFIERS MAY CONTAIN HYDROGENGAS; USE PROPER SAFETY PRECAUTIONS.

Every Six Months

1. Check Analyzer power and calibration voltages.

2. Calibrate Generator Gas Analyzers, as necessary.

3. Run Diagnostics.

When the Generator is Down

During periods when the generator is shut down, it is recommended that either a) power bemaintained to the DHCP, or b) the DHCP be isolated by placing all isolation valves in “off”position.

20HA0156P01 Rev. D

Component Replacement Instructions

The hydrogen analyzer sensing units, input/output circuit board, processor circuit boards,power supplies and intrinsically safe barriers are located inside the main junction box. To gainaccess to the inside of the main junction box for service, remove the 32, 3/4-inch captivebolts. Two guide studs assist with removal/replacement.

CAUTION! Do not scratch sealing surfaces on the main junction box. The main junc-tion box lid weighs 50 lbs (22.7 kg). Take precautions during removal. Prior to open-ing the main junction box, remove power from the HCP and ensure the system is freeof hydrogen.

Removing a Gas Analyzer Sensor

To remove a hydrogen analyzer from a flameproof enclosure:

1. Disconnect AC input power.

2. Manually close isolation valves HV-2979, HV-2980, HV-2982 and HV-2981.

3. Remove the cover of the main junction box.

4. Remove 4 screws used to secure processor and I/O boards (see Figure 2).

5. Remove the 12-pin cable connector from the sensor circuit board.

6. Remove inlet and outlet tubing connections from the analyzer with a 7/16-inch wrench.

7. Remove mounting hardware (4 slotted screws).

8. To reinstall sensor cell, reverse above process, then leak check.

Removing a Processor Circuit Board

To remove a processor circuit board from the main junction box:


2. Close isolation valves HV-2985, HV-2986, HV-2983 and HV-2973A.

3. Remove the main junction box cover.

4. To remove the upper processor board, disconnect the 40-pin ribbon cable and removethe 4 nuts (11/32).

5. Install the new processor board in reverse order.

6. Check that pin #1 on the ribbon connector is properly aligned.

21 HA0156P01 Rev. D

Removing the Input/Output (I/O) Circuit Board


2. Close Isolation valves HV-2985, HV-2986, HV-2983 and HV-2973A.

3. Remove the main junction box cover.

4. Remove the processor board. Disconnect the 60-pin ribbon cable and 4 nuts (11/32).

5. Remove the 8 slotted screws, which hold the board in place and spacers in place (4 ontop, 4 on bottom of board).

6. Remove all wiring connections to the terminal blocks on the Input/Output board.

7. Disconnect power supply connections to the Input/Output board.

8. Disconnect the analyzer cell, 12-pin headers.

9. The Input/Output board can now be removed. Install the new input/Output board inreverse order.

Removing Solenoid Valves Coils

All solenoid valves are connected in the main junction box. Once the inoperable solenoidvalve is located, remove AC power and manually close all isolation valves.

1. Reach under the solenoid and remove the top cap by prying it off.

2. Push the solenoid valve body down and slide the nameplate/retainer off.

3. Open the closest (small, adjacent) junction box to the solenoid valve and locate the 3solenoid valve wires.

4. Cut and strip the wires.

5. Install the new solenoid valve.

6. Splice the wires together using a butt splice.

7. Replace the (small, adjacent) junction box cover.

8. Restore AC power and manually reopen the isolation valves.

Removing Moisture Indicators

Three moisture indicators and three gas purifiers are located on the front of the panel(Figure 1).

To remove moisture indicators:


2. Manually close all isolation valves.

22HA0156P01 Rev. D

3. Unscrew moisture indicator by hand.

4. Replace moisture indicator by screwing in the replacement by hand.

5. Open isolation valves HV-2971, HV-2972, HV-2979, HV-2980, HV-2973, HV-2974, HV-2981, HV-2982 and HV-2978.

6. Perform leak check.

7. Reconnect AC input power.

Removing Gas Purifiers



3. Release pressure within purifier housing by opening drain at HV-2971A, HV-2972A or HV-2973A, as appropriate.

4. Remove 8 bolts (1/2” hex) at bottom flange of purifier housing.

5. Remove purifier cartridge and two associated gaskets.

6. Replace cartridge and gaskets.

7. Resecure bolts (to 120” lbs torque).

8. Close drain.

9. Open isolation valves HV-2971, HV-2972, HV-2979, HV-2980, HV-2973, HV-2974, HV-2981, HV-2982 and HV-2978.



Removing Flow Meters



3. Remove tubing fittings and locking nuts from the back of the flowmeter.

4. Withdraw flowmeter from the front side of the DHCP.

5. To install replacement, reverse above process.



(Removing Moisture Indicators cont’d)

23 HA0156P01 Rev. D

Figures

The figures that follow depict the DHCP and its components. All references in this documentrefer to the following figures.

Please note that figures 11-25 depict portions of the DHCP. These figures are provided foreasy reference in configuring isolation valves and switches. Please note that isolation valvehandles and actual switches are not shown. Instead, “on,” “off” and arrow graphics areprovided. Contact Environment One with questions relating to any of the figures relating tothis manual.

24HA0156P01 Rev. D

Printable Area

Figure 1 - DHCP Outline

HA0156P01 Rev D Page 25

FRONT VIEWLOOKING DOWN AT BASE PLATE

SIDE VIEW

TURBINE ENDFLOW

COLLECTOR ENDFLOW

TOTALFLOW

TURBINE ENDLINE

OFF

LOW FLOWEND END

HIGH FLOW

COLLECTOR ENDCONFIRMATION

OFF

CONFIRMATIONTURBINE END

OFFOFF

CONFIRMATION

HIGH FLOWEND END

LOW FLOW

LINECOLLECTOR END

OFF

COLLECTOR COLLECTORTURBINE TURBINE

NITROGEN

OFF

HYDROGEN

OFF OFF

PURGE

OFF

CASE

OFF

CARBONDIOXIDE

CALIBRATION GASES

FAN

PRESSUREDIFFERENTIAL

GAGE

INDICATORMOISTURE

TURBINE END

INDICATORMOISTURE

CASE

INDICATORMOISTURE

COLLECTOR END

TRANSMITTERDIFFERENTIAL

FANTURBINE END

PURIFIER

TURBINE END ANALYAER #1

PURIFIER PURIFIERCOLLECTOR ENDCASE

COLLECTOR END ANALYAER #2

TURBINE END-CASE/CAL/PURGE COLLECTOR END-CASE/CAL/PURGE CASE - CAL / PURGE

Generator Gas Analyzer

ENTER

Fn

AC POWER

IN

IN

PURGE

GAS PURITY

2H

2C0

2N

CALIBRATE

2H

AIR

RESET

WARNING

ALARM

NORMALH

AIR

2IN

C02

C02

TROUBLE


ENTER

Fn

CALIBRATE

2N

2C0

2H

C02AIR IN

PURGE

C022H IN

AC POWERNORMAL

WARNING

ALARM

H

AIR

2IN

RESET

TROUBLE

GAS PURITY

Printable Area

Printable Area

Printable Area

HD0156P01 Rev D Page 29

Figure 4 - DHCP Wiring Diagram

Printable Area


Figure 4a - DHCP Wiring Diagram

Printable Area


Figure 5 - DHCP Piping Schematic

Printable Area

Printable Area

PURGECALIBRATE


ENTER

Fn

2N

C0 2

2H

2C0AIR IN

2H 2C0IN

NORMAL

WARNING

ALARM

IN2

AIR

H

RESETGAS PURITY

AC POWER TROUBLE

37 HA0156P01 Rev. D

Figure 8 - DHCP Display Descriptions

Figure 8A - Display Indicators

Figure 8B - Display Keys

Indicator

Lit when the display is powered and functioning properly

Status Ref.1

AC Power

Normal Lit when the GGA is measuring the concentration ofhydrogen in air

Alarm Lit when the GGA is measuring hydrogen in air and theconcentration is below the warning level

Warning

1

2Lit when the GGA is in measuring hydrogen in air and theconcentration is below the warning level

Trouble Lit when the GGA detects an abnormal condition 3, 4, 5

Calibrate H2

Calibrate CO2

Calibrate N2

Purge H2 inCO2

Purge Air in CO2

Gas Purity

LCD Display

Lit when the GGA is calibrating against a 100% hydrogenstandard

Lit when the GGA is calibrating against a 100% nitrogenstandard

Lit when the GGA is calibrating against a 100% carbondioxide standard

Lit when the GGA is measuring the concentration ofhydrogen in carbon dioxide

Lit when the GGA is measuring the concentration of nitrogenin carbon dioxide

Three-digit gas purity indicator (0 to 99.9%)

Displays the current menu selection when the menu isactive

Key

Clear the Alarm and Warning conditions in Normal mode

Function

Reset

Fn Activate the menu

Enter Select a menu item

UP Arrow Used with some menu options to increase the value of aconstant

DOWN Arrow Used with some menu options to decrease the value of aconstant

38HA0156P01 Rev. D

Figure 9 - DHCP Status

Condition

The GGA is measuring hydrogen in air and theconcentration is below the alarm level

Typical Cause Indicators Affected

1 Alarm Alarm LED + AlarmRelay

2 Warning The GGA is measuring hydrogen in air and theconcentration is below the warning level

Warning LED +Warning Relay

3 Tcell ERROR The sensor cell is not at a temperature of 55 ±0.5degrees centigrade

4 Power SupplyProblem2

Trouble LED +Trouble Relay


One or more power supplies are not within tolerance

5 Lower Error3 The GGA is detecting a communication error whiletrying to talk to the I/O board or the display. One ormore relays are defective.


2 Run diagnostics to identify power supply problems.3 Run diagnostics to identify which loop error is present.

39 HA0156P01 Rev. D

Figure 10 - DHCP Customer Contacts

Contact

Energized when the GGA is measuring hydrogen in air andthe concentration is below the alarm level

Status Ref. 4

AlarmGeneral Purpose

1

WarningGeneral Purpose

Energized when the GGA is measuring hydrogen in air andthe concentration is below the warning level

2

TroubleGeneral Purpose

De-energized when the GGA detects an abnormalcondition

3, 4, 5

4 See Figure 9

Printable Area

CASE

HV-2978

CASE

HV-2978

TURBINE END-CASE/CAL/PURGE

HV-2971

LINETURBINE END

LOW FLOW

OFF

HO-2972

ENDTURBINE

HIGH FLOW


FAN

PDI-292GAGE

HO-2971

TURBINEEND

COLLECTOR END

HV-2974

CONFIRMATION

CARBONDIOXIDE

CALIBRATION GASES

COLLECTOR END-CASE/CAL/PURGE CASE - CAL / PURGE

CONFIRMATION

HV-2972

OFF


NITROGEN

HV-2985

HV-2987

OFF

OFF OFF

HO-2973

HIGH FLOW

COLLECTOR

OFF

OFF

HV-2986

HYDROGEN

HV-2984

LOW FLOW

PURGE

HV-2983

OFF

HO-2974

END ENDCOLLECTOR


LINETURBINE END

HV-2971

LOW FLOW HIGH FLOW

OFF

HO-2972

FANDIFFERENTIAL

GAGEPRESSURE

PDI-292

HO-2971

TURBINEEND END

TURBINE

CALIBRATION GASES

DIOXIDECARBON

CONFIRMATION

HV-2974

COLLECTOR END

COLLECTOR END-CASE/CAL/PURGE

HV-2972

OFF

CASE - CAL / PURGE

NITROGEN

HV-2985

OFF

HV-2987

OFF


CONFIRMATION

HIGH FLOW LOW FLOW

HO-2973

OFF

OFF

OFF

HV-2986

HYDROGEN

HV-2984

PURGE

HV-2983

HO-2974

OFF

COLLECTOREND

COLLECTOREND

OFF

OFF

HV-2973

COLLECTOR ENDLINE

OFF

HV-2973

OFF

COLLECTOR ENDLINE

Printable Area

HO-2974

ENDCOLLECTOR

LOW FLOW

DIFFERENTIAL


HO-2972

TURBINE

LOW FLOW

OFF

HV-2971

TURBINE ENDLINE

ENDHIGH FLOW

HO-2971

PRESSURE

FAN

PDI-292GAGE

TURBINEEND


OFF

HV-2974

CASE - CAL / PURGECOLLECTOR END-CASE/CAL/PURGE

CONFIRMATION

OFF

HV-2972

TURBINE END

HV-2987

OFF

NITROGEN

HV-2985

CONFIRMATION

HYDROGEN

HV-2984

CARBONDIOXIDE

HV-2986

CALIBRATION GASES

OFF

OFF

HIGH FLOW

HV-2983

HO-2973

OFF OFF

PURGE

COLLECTOREND

OFF

HV-2973

CASE

HV-2978

OFF

COLLECTOR ENDLINE

LOW FLOW

COLLECTOREND

HO-2974

DIFFERENTIAL


LOW FLOW HIGH FLOW

HO-2972

OFF

HV-2971

HO-2971

FAN

PRESSURE

PDI-292GAGE

TURBINETURBINE END

LINEEND END

TURBINECONFIRMATION

HV-2974

COLLECTOR END

OFF

CASE - CAL / PURGE

OFF


HV-2972 HV-2987

OFF

NITROGEN

HV-2985


CONFIRMATION

HIGH FLOW

HYDROGEN

HV-2984

DIOXIDECARBON

HV-2986

CALIBRATION GASES

OFF

OFF

HV-2983

HO-2973

OFF

PURGE

OFF

COLLECTOREND

OFF

HV-2973

CASE

HV-2978

OFF

COLLECTOR ENDLINE

Printable Area

COLLECTOR

LOW FLOW

PURGE

HV-2983

LOW FLOW

COLLECTOR

HV-2983

PURGE

GAGEPDI-292

FANDIFFERENTIAL

PRESSURE


LOW FLOW

TURBINE

HV-2971

OFF

LINETURBINE END

HIGH FLOW

HO-2972 HO-2971

END ENDTURBINE

HV-2985

NITROGEN

CASE - CAL / PURGECOLLECTOR END-CASE/CAL/PURGE

TURBINE ENDCONFIRMATION

HV-2972

OFF OFF

HV-2987

CONFIRMATION

CALIBRATION GASES

HV-2986

DIOXIDECARBON

HV-2974

OFF

OFF

OFF

CONFIRMATIONCOLLECTOR END

HIGH FLOW

HO-2973

OFF

HV-2984

HYDROGEN

COLLECTOREND


FAN


PDI-292GAGE

HIGH FLOWLOW FLOW

HV-2971

OFF

HO-2972 HO-2971

TURBINELINE

TURBINE END

ENDTURBINE

END

NITROGEN

CASE - CAL / PURGE

HV-2985

HV-2972


OFF

HV-2987

OFF


CONFIRMATION

HIGH FLOW

CALIBRATION GASES

HV-2974

CARBONDIOXIDE

HV-2986

OFF OFF

OFF

OFF

HO-2973

HV-2984

HYDROGEN


ENDCOLLECTOR

COLLECTOR END

OFF

HV-2978

CASE

HO-2974

OFF

HV-2973

OFF

ENDLINE

OFF

CASE

HV-2978

OFF

HO-2974

HV-2973

OFF

COLLECTOR END

ENDLINE

Printable Area

PURGE

HV-2983

COLLECTOR

DIFFERENTIAL

TURBINE

HIGH FLOW

HO-2971

END


TURBINE END

OFF

HV-2971

LINE

LOW FLOW

HO-2972

TURBINEEND

HV-2987

CONFIRMATION



FAN

PDI-292GAGE

PRESSURE

OFF

HV-2972

CASE - CAL / PURGE

OFF

CARBON

CALIBRATION GASES

OFF

HV-2974

NITROGEN

OFF

HV-2985

DIOXIDE

OFF

HV-2986


HIGH FLOW

HYDROGEN

HV-2984

OFF

HO-2973

END

HV-2973

OFF

LINECOLLECTOR END

LOW FLOW

HO-2974

OFF

CASE

HV-2978

COLLECTOREND

OFF

PURGE

HV-2983

COLLECTOREND

HO-2971

HIGH FLOW

TURBINE

DIFFERENTIAL


LOW FLOW

OFF

HV-2971

HO-2972

TURBINE ENDLINE

TURBINEEND

HV-2987

CONFIRMATION


FAN

GAGEPDI-292

PRESSURE

OFF

HV-2972


HIGH FLOW

OFF

CARBON

CALIBRATION GASES

CASE - CAL / PURGE

OFF

HV-2974

OFF

NITROGEN

HV-2985

DIOXIDE

OFF

HV-2986

HYDROGEN

HV-2984

HO-2973

OFF


ENDLOW FLOW

HV-2973

OFF

HO-2974

OFF

CASE

HV-2978

OFF

LINECOLLECTOR END

COLLECTOREND

Printable Area

HV-2978

CASE

HV-2978

CASE

HV-2983HV-2984HV-2985 HV-2986PDI-292

TURBINE END-CASE/CAL/PURGE COLLECTOR END-CASE/CAL/PURGE CASE - CAL / PURGE


HV-2971

TURBINE ENDLINE

TURBINE ENDLINE

HV-2971

LOW FLOW

OFF

ENDTURBINE

HO-2972

HIGH FLOW

GAGE

FANDIFFERENTIAL

PRESSURE

ENDTURBINE

HO-2971

LOW FLOW

OFF

END

HO-2972

TURBINE

HIGH FLOW

PDI-292

PRESSUREGAGE

DIFFERENTIALFAN

TURBINE

HO-2971

END

HV-2974


CARBONDIOXIDE

CALIBRATION GASES

HV-2974

CALIBRATION GASES

DIOXIDECARBON



CONFIRMATION

HV-2972

OFF

NITROGEN

OFF

HV-2987

OFF

CONFIRMATION


HV-2972


OFF

HV-2985

CASE - CAL / PURGE

NITROGEN

OFF

HV-2987

OFF

OFF

COLLECTOR

HIGH FLOW

HO-2973

OFF

OFF

HYDROGEN PURGE

END ENDLOW FLOW

COLLECTOR

HO-2974

OFF

HO-2973

HIGH FLOW

COLLECTOR

OFF

HV-2984HV-2986

OFF

OFF

HYDROGEN

HV-2983

PURGE

END END

HO-2974

COLLECTOR

LOW FLOW

OFF

OFF

COLLECTOR ENDLINE

HV-2973

OFF

OFF

COLLECTOR END

HV-2973

LINE

OFF

Printable Area

HO-2974

END

END

HO-2974

LOW FLOW

COLLECTOR

COLLECTOR

LOW FLOW

HV-2983HV-2986 HV-2984HV-2985PDI-292

TURBINE END-CASE/CAL/PURGE CASE - CAL / PURGECOLLECTOR END-CASE/CAL/PURGE

DIFFERENTIAL

DIFFERENTIAL


LOW FLOW

TURBINE

HO-2972

OFF

TURBINE ENDLINE

HV-2971

END ENDHIGH FLOW

TURBINE

HO-2971

GAGE

FAN

PRESSURE

HO-2972

TURBINE

LOW FLOW

OFF

TURBINE END

HV-2971

LINEEND END

TURBINE

HIGH FLOW

HO-2971

GAGEPDI-292

FAN

PRESSURE

COLLECTOR END

HV-2974

CONFIRMATION

OFF

CASE - CAL / PURGE

OFF

HV-2974


CONFIRMATION

OFF

TURBINE END

HV-2972

CONFIRMATION

HV-2987

NITROGEN

OFF

OFF

CONFIRMATION


TURBINE END

HV-2972

HV-2985

HV-2987

CONFIRMATION

NITROGEN

OFF

HYDROGENDIOXIDECARBON

CALIBRATION GASES

OFF

OFF

COLLECTOR

HIGH FLOWEND

OFF

HO-2973

OFF

PURGE

HYDROGEN

HV-2984HV-2986

CARBONDIOXIDE

CALIBRATION GASES

OFF

OFF

HV-2983

HIGH FLOW

COLLECTOR

HO-2973

END

OFF

PURGE

OFF

HV-2978

COLLECTOR END

OFF

HV-2973

CASE

LINE

OFF

HV-2978

HV-2973

COLLECTOR END

OFF

CASE

OFF

LINE

Printable Area

PURGE

HV-2983

PURGE

HV-2983

COLLECTOR

LOW FLOW

LOW FLOW

COLLECTOR

HV-2984HV-2986HV-2985PDI-292

TURBINE END-CASE/CAL/PURGE CASE - CAL / PURGECOLLECTOR END-CASE/CAL/PURGE


FAN

GAGE

GAGEPDI-292


FANDIFFERENTIAL

PRESSURE

TURBINE

LOW FLOW

TURBINE ENDLINE

HV-2971

OFF

END

HO-2972

TURBINE

HIGH FLOWEND

HO-2971

LOW FLOW

TURBINETURBINE END

LINE

HV-2971

OFF

END

HO-2972

END

HO-2971

HIGH FLOW

TURBINE

NITROGEN

NITROGEN

HV-2985

CASE - CAL / PURGE

HV-2972


CONFIRMATION

OFF

HV-2987

OFF


HV-2972


CONFIRMATION

OFF OFF

HV-2987

CONFIRMATION

HV-2974

CARBONDIOXIDE

CALIBRATION GASES

COLLECTOR END

OFF OFF

OFF

ENDHIGH FLOW

COLLECTOR

OFF

HO-2973

HYDROGEN

HV-2986

HV-2974

DIOXIDECARBON

CONFIRMATION

CALIBRATION GASES

COLLECTOR END

OFF

OFF

OFF

HV-2984

COLLECTOR

HIGH FLOWEND

HO-2973

OFF

HYDROGEN

HV-2978

OFF

COLLECTOR END

CASE

END

OFF

HO-2974

LINE

OFF

HV-2973

OFF

COLLECTOR END

HV-2978

CASE

END

HO-2974

OFF

LINE

HV-2973

OFF

Printable Area

COLLECTOR

HV-2983

PURGE


DIFFERENTIAL

TURBINE

HIGH FLOW

HO-2971

END

OFF

TURBINE END

HV-2971

LINETURBINE

LOW FLOW

HO-2972

ENDCONFIRMATION

HV-2987



PRESSURE

PDI-292GAGE

FAN

HV-2972

OFF

CALIBRATION GASES

CARBON

OFF

HV-2985 HV-2986

CASE - CAL / PURGE

COLLECTOR END

HV-2974

CONFIRMATION

OFF

NITROGEN

OFF OFF

DIOXIDE

HV-2984

HYDROGEN

HO-2973

END

OFF

HIGH FLOW

COLLECTOR ENDLINE

HV-2973

OFF

HV-2978

COLLECTOR

LOW FLOW

HO-2974

END

OFF

CASE

OFF

48HA0156P01 Rev. D

Figure 26 - Parts ListIt

em D

escr

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on

Tag

Su

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Man

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Man

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HV

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14H

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Mat

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49 HA0156P01 Rev. D

Item

Des

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up

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anu

fact

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fact

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use

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0045

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Cro

use

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240M

0766

dual

cha

nnel

, iso

latio

n ba

rrie

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2-4

HA

0045

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Cro

use

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dsS

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dual

cha

nnel

, iso

latio

n ba

rrie

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lam

e A

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tor

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sing

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-18P

1-1

HB

0018

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Env

ironm

ent O

neH

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01fla

me

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esto

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usin

gF

lam

e A

rres

tor

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sing

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0018

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ent O

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Arr

esto

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usin

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lam

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HA

0065

P01

Leed

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Nor

thru

p85

104

flam

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ctor

HA

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2-5

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ther

mos

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220

VA

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form

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A01

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AC

Tra

nsfo

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50HA0156P01 Rev. D

Environment One Corporation2773 Balltown RoadNiskayuna, New York USA 12309–1090

Tel: (01) 518.346.6161FAX: 518.346.6188

www.eone.com

A PCC Flow Technologies, Inc. Company

Documents

Dual Hydrogen Control Panel (DHCP) · HA0156P01 Rev. D 6 Introduction Modern high capacity turbine generators use hydrogen gas as a cooling medium. Two reasons for using hydrogen