TECHNICAL SPECIFICATIONS DESCRIPTION: - CENTAC COMPRESSOR 1 Description: The Centac 1 compressor is a multi-stage (2-stage) centrifugal air compressor. It has an output of approx 5000 to 6000 m3/hr (actual uncompensated volume displacement) at 550kPa. Major Component Breakdown:

Two - stage compressor unit Electric motor Lubrication pump Oil pre-lube pump Cooper Controller Motherboard PLC for switchgear interlocking control (Modicon Momentum 171CCC96030-IEC) Control panel HMI Screen for operations and diagnostics display Other auxiliaries The Compressor Base

Other Additional Technical Information: Multi-stage Centrifugal Compressor:

Figure 1 - Centrifugal Multistage Compressor

Make: Ingersoll Rand Model: Centac

Manufactured date: 1988 Type: C115MX2-2RH

Serial: V-2463 Discharge Pressure 98Psig Intake temperature: 35°C

Cooling water temperature: 25°C

Cooling water flow: 743 l.min-1 Intake humidity: 60% Stages: 3 Capacity: 118c3.min-1

Max Discharge Pressure: 800kPa Inlet Actuator Type: Pneumatic (Nitrogen or compressed air) BOV Actuator Type: Pneumatic (Nitrogen or compressed air) Starter Type: Full Voltage

Drive Type: Induction Motor Centac Control Panel: HMI Make: Cooper TurboCompressor HMI Type: Vantage HMI Part Number: P3798102-00010 System Part Number: CN-UIM2 Panel Serial Number: 3004021426 Assembly OEM: SCAE Energy Systems Automation Part Number: A3794930-11593 Voltage: 380Vac Amps: 45A

Frequency: 50Hz Reference Standard: IEC-60439-1

Figure 2 - Control Panel HMI

Controller motherboard make: Cooper TurboCompressor Controller motherboard type: Vantage

Motherboard Part number: Part Number: P3798102-00000 Main Logic Module part Number: CN-MLM2

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Figure 3 - Control Panel – Controller Board

PLC Control System:

Figure 4 - Modicon Momentum PLC Controller System

Make: Schneider Electric Modicon

Model: Momentum CPU Code: 171CCC96030-IEC IO types: DI (24Vdc), DO (24Vdc), AI (4-20mA IO Modules Map: 170AAI-140-00 x2 170ADM-350-10 x2 Software Compiler: Concept 2.5 Language Type: IEC FBD

Communication Protocol: Modbus Ethernet (Compatible with TCPIP) (Interbus communication used for interlinking between IO Modules.

Oil Circulation Pump:

Figure 5 - Prelube pump Motor Make: BMG Motor Model: Motoline Serial Number: 13112558 Power: 1.1kW Frequency: 50Hz

Voltage: 220Vac/380Vac Amps: 4.36A @220Vac /2.153A @380Vac Pole: 2 Phase: 3 Frame size: 80

RPM: 2810RPM Efficiency: 75%

Cos phi: 0.83 IP rating: 55 Bearings DE: 6204 Bearings NDE: 6204 Grease Type: MT47 Mass: 9kg Manufactured: 2013

Compressor Motor: Make: Schorch

Type: Squirrel Cage Induction Type Number: K85429G-AQ02 IM83 Serial Number: 44567711/1 Voltage: 3300Vac (star) Cos phi: 0.89 Frequency: 3phase 50Hz Stator Current: 159A

Size: UC355/112 Speed: 2974 RPM Output: 772kW Manufactured date: 1988 Ambient Air Temp: 40°C Enclosure Protection: IP23 Oil Volume per bearing: 2.4L

Figure 6 - Compressor Motor

Air Inlet Filters:

Figure 7 - Air Inlet Filter

Make: Donaldson Type: Air Cleaners Model: TTD-08 Serial Number: 1076-B

Operations Summary; This compressor was installed and commissioned in 2015. Being the latest addition to the family this compressor was regarded to be in the best condition, and has the lowest accumulated running hours. This compressor is situated in the Compressor house 1, which is located in the Highveld Steel Steelwork premises. It has been manufactured and assembled in 1988 (it contains auxiliaries being installed much later e.g. the oil pump, 2013). This compressor has an approximate running hours amount of 87000. (Being running for less than a year). The compressor recently showed signs of an oil leak from the compressor itself which probably implies the seal

between cooling circuit and oil has failed leading to oil and water mixing. The compressor would have to be stripped,

inspected and repaired before start-up. It is also advisable that the compressor be subjected to a major service (even

though it is still regarded as relatively new) as it has been offline for an extended period.

An additional note to consider: This compressor has its own controller system and HMI panel, independent of the

system infrastructure. However, the PLC system mentioned above controls the main breaker based on interlocks

such as system cooling water flow requirements etc.