YGFC Fan Coil Unit - Blueair Technologies DE... · 4 When air handling unit is non-use, the coil should be filled with water in sum-mer so as to avoid rust corrosion; wa-ter in coil

YGFC Installation, Operation & Maintenance Manual

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Installation, Operation &Maintenance Manual

YGFC Fan Coil Unit

FORM NO.:YGFC-08IOM(YGF)(1208)

Ceiling Concealed Type

Vertical exposed Type

Vertical Concealed Type

Ceiling Exposed Type

Licence XK06-135-00028


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Contents

Catalogue

Overview of Product 1Installation & Transportation of Product 7Startup & Running of Product 8Maintenance & Service of Product 8Warnings 8Pressure Test & Adding Water 9Troubleshooting 9


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1.Explanation of Models

YORK Corporation can supply many types and models of fan coil unit. Users canselect applicable products according to their own taste, the installation space andposition, etc. Detailed types and models are explained as follows:

Overview of Product

Overview ofProduct


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2. Outlines & Dimensions & Weight

Overview of Product(continued)


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Weight Sheet:



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3. Characteristics of Air HandlingUnit

Special hyperbolic windowed-finsand Y-type heat-exchange copper pipeare adopted, which strengthens dis-turbance of air current. Fins spacingis regulated to optimize pipeline set-ting and promote heat exchange effi-ciency of coil comprehensively.According to the performance curveof fan, optimize structure of motor tomake the performance curve of fancomply with that of motor with whichthe deviation of air volume can be re-duced to maximum extent when fanload changes.

Water separating&collecting headermade of single forged molding brassmakes refrigerant water inflow and out-flow coil be arranged more equally andmake water pressure drop be smallerwhich greatly raise heat-exchange effi-ciency and reduces water pressure dropin water system.Optimal design of drainage port of condensate drain pan can drain condensatewater thoroughly which can reduces thegrowth of bacterium and microbial.TiO2 sterilizer (optional component)is installed on unit, which can kill mostof bacterium and virus in air and im-prove air quality completely.The external casing made of galvanized steel plate with high ten-sion and excellent anti-corrosionperformance is formed by punch-ing and bending process. primaryhot-press molded PE thermal insu-lation fiber is pressed and adheredon inner wall of panel, which avoidscold bridge. Base surface of drainpan is packaged and adheredstrictly by primary hot-press moldedPE thermal insulation fiber, whichavoids secondary cold bridge.Single-phase3-speed permanent-magnet capacitance -driven asynchro-nous motor is the important powerdrive part. Motor central rotor has beenhardened and tempered, chrome-

plated and antiseptic-treated. Equippedwith high-precision permanent-lubrica-tion Japan NSK rolling sealing bearingto meet the requirement of high efficiencyand hyper-low noise level.Starting capacitance is completelysealed in metallic casing. The externalpower supply cable of motor is packagedby flexible metal tube, which meets in-ternational f ire-prevention safetystandards.Lengthened drain pan makes externalpipeline valve joint be placed in drainpan, which avoids leakage of conden-sate water.Double intake centrifugal fan with forward-curved impeller made of galva-nized steel plate is regulated and testedby static and dynamic equilibrium test-ing strictly, the processed air is stream-line sent out which reduces vortex air cur-rent and greatly reduces noise causedby air current friction. The unit will runmore stably and calmly.Volute terminal plate and guide plate arejoggled which overcomes the shortcom-ing of air leakage and easy rustiness ofspot welding connection. Before ex-factory, operation test, high-voltage test and insulation test areperformed. All terminals of unit are setin metallic box so as to guarantee moresecurity operation.Each coil is leak-detected by 2.8MpaWater press and overpressure gas-tighttest. The maximum working pressure al-lowed is 1.6Mpa so as to guarantee per-formance and quality of each unit.

4. Pplicable Environment of AirHandling Unit

The temperature of refrigerant watershould not be lower than 5 , so as toavoid dewing. And hot water tempera-ture should not be higher than 80 (usually 60 ).Clean and soft water quality is required.Running temperature 40 and relative humidity 95%

ProductConveyance/Install


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Transportation & Installation ofProduct Transportation1 During the course of transportation,

the unit should not be knocked, fallen,crushed and suffered from rain andsnow.

2 The unit should be placed in clean,dry, fire-protection and ventilated site,without any corrosive gas around it

3 Please handle the unit with care. Donot stretch your hands into fan volute tocarry it so as to avoid distortion ofimpellers.

Installation1 Air handling unit should be installed

by personnel who knows well aboutsuch products and local relativeregulations.

2 In order to confirm the unit is notdamaged during transportation, leakageinspection (1.0Mpa) for coil is requiredbefore installation.

3 Before installation, please confirmprior prepa ration be ready or not, suchas air duct, water pipe, wiring interfaceand clamping screws, etc.

4 Vertical-exposed type unit should beinstalled on horizontal ground. Ceiling-exposed type unit should be lifted. 6-8MM full-thread screws and plainwasher, spring washer and nuts areadopted to hold it. Lifting should be firmand hard. The lifting point should betightened and it should have enoughstrength to bear weight of uni tandvibration when unit runs. When lift-ing unit,please keep drain pan has 5lope angel against drainage pipe so asto drain condensate water.

5 When installing unit, water pipes andunit should be connected by flexible pipeand adhesive tape. Torque should notexceed 205.6N.M so as to avoid waterleakage.

6 A water filter should be installed oninlet water pipe so as to avoid coil beingblocked by contamination. Inflow watershould be softening so as to guaranteeheat exchange efficiency of coil.

7 Valves should be installed in inletand drainage duct, which can regulateflow volume and cut off water sourcewhen maintaining and inspecting. Pipe-line should be pre-heat preservation soas to avoid leakage of condensatewater.

8 Filter should be installed in inlet ofcondensate water pump so as to avoidcoil being blocked by contamination. Forthe unit without air filter, please installfilter screen in return inlet so as to avoiddust blocking coil fins.

9 Before wiring, please check voltage,frequency and phase and confirmwhether they accord with requirementof unit or not. Deviation of voltage shouldnot exceed 10% of rated voltage. Powerand switches connection should be in-stalled according to electric schematicdiagram strictly. Earth lead should beconnected credibly. Wiring diagram isas follows:

10 Several different models of unitshare one temperature controller isstrictly prohibited.

11 Installation of CC series-ceilingconcealed type unit: Insert the reservedscrews on ceiling to the four kidney-shaped holes. Fix them by plain washer,spring washer and nuts.



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12 Installation of VC series- verticalconcealed type unit: This kind of unitcan be fixed from the rear of unit byinstalling 6-8MM embedded full-threadscrew, equipped with plain washer,spring washer and nuts. About 50angle of inclination should be left byadjusting the foundation so as to draincondensate water freely.

13 CE model installation:The unit is fastened through four ellip-tical holes on the unit to the lifting rodby metal washer and nut; Whennecessary, use shims to obtain theproper level of 5 slope , This will en-sure that the condensate will drainfrom the unit.Remove the filter by pushing it upabout 10mm,then pulling it down to-wards inlet.VE model installation:When necessary, use shims to obtainthe proper level of 5 slope , This willensure that the condensate will drainfrom the unit. mounting location mustallow enough clearance to access tothe coil, drain connections and elec-trical junction box.Remove the filter by pushing the fas-tener back about 10mm ,then pullingit down

Startup & Running of Product1 After finishing installation of unit,

please rotate wind wheel manually. Ifthere is no mechanical friction sound,switch on power and inspect the rota-tion direction of wind wheel.

2 Before operating the unit, pleaseeliminate foreign matters in drain pan,in air duct and around coil. Check theinstallation points, such as waterpipes, electrical wiring, and so on.

3 Before operating the unit primarily,please close inlet and drainage valves.After cleaning refrigerant water pipe-line system, open the inlet and drain-age valves.

4 Release valve on outflow water pipeshould be opened in initial running so

as to exhaust air in pipeline. Do notclose valve until water outflows.

Maintenance & Service of Product1 Air conditioning unit should be main

tained by professional staff. Dailymonitoring and periodical mainte-nance for the unit are required. Strictposition guide system and operatinginstructions should be established.Regular maintenance, service, exami-nation and repair should be done.

2 Filter screen should be cleaned onceevery three months.

3 Pipes should be cleaned periodically.Eliminate collected dust outside pipesand scale crust in pipes so as not toaffect heat exchange and ventilation.

4 When air handling unit is non-use, thecoil should be filled with water in sum-mer so as to avoid rust corrosion; wa-ter in coil should be drained out in win-ter so as to avoid copper pipescracking.

5 When examining and repairing airhandling unit, power should be shuto f f a n d c a u t i o n b o a r d w i t hMaintaining...........Please do not

switch on should be set in the placeof power so as to avoid danger.

Warnings1 Screw down connecting pipelines with

right force. Otherwise it will causestructural destruction of coil.

2 Null line should be connected in connecting point of null line. Otherwisemotor will be burnt out.

3 It is not allowed that several fan coilunit share one thermostat. Otherwiseit will burn out motor.

4 Establishing pressure test plan shouldfollow the principle as follows: Waterflows from lower place to higher place;water inflows storey by storey andabiding by the attentions which pres-sure testing and adding water arerequired. Otherwise it will probablycause structural destruction of fan coilunit and system pipelines.


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Pressure Test & Adding WaterBefore pressure test is operated, firstly,pressure testing plan should be estab-lished , applicable pump is selected andreasonable waterway is set up. Duringthe course of pressure test, pleaserecord the condition of pressure testcarefully and inspect the changing ofpressure at any moment. The followingitems must be considered when pres-sure test plan is drawn up:1 Open the release valve on drain

header before adding water into coil.Close valve after air in coil isexhausted.

2 Hydraulic testing should be operated with temperature above 50. Oth-erwise antifreezing measurementshould be taken.

3 Hydraulic testing should be performed with pressure increasing stepby step. pressure should be in-creased slowly and equally. Afterwater pump stops running and hy-draulic pressure is stable, pleasecheck all joints carefully so as toconfirm water leakage exists or not.Mending can not be done under hy-draulic pressure.

4 Adding water, exhausting and testing storey by storey are required.

5 If pipelines have no leakage, thermal insulation treatment for pipelinesis necessary according to settingplan.

Troubleshooting1 Over-high Noise:

Possible Reasons:a. Motor shaft is destroyed.

Suggestion: Replace motor.b. Clamping screws of fan are loosened.

Suggestion: Tighten screws.c. Volute distorts and impeller knocks.

Suggestion: Replace fan.

2 Condensate water doesn't dis-charge freely:

Possible Reasons:a. Pipes block..

Suggestion: Check pipe valves tofind whether they are open or thereis any foreign matters in it or not.

b. Inclination degree is not enough.Suggestion: Regulate the height ofunit to set angle of inclination.

3 Motor is burnt out:Possible Reasons:

a. Incorrect wiring.Suggestion: Replace motor and wir-ing according to wiring diagramstrictly.

4 Air volume is not enough:Possible Reasons:

a. Resistance of duct exceeds the set-ting value.

Suggestion: Reduce resistance ofduct or re-select unit.

b. Incorrect unit type.Suggestion: Re-select unit.

c. Low voltage.Suggestion: Regulate voltage or re-select unit



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FORM NO.:YGFC-08IOM(YGF)(1208)SUPERSEDES:YGFC-07IOM(YGF)(0608)

Documents

YGFC Fan Coil Unit - Blueair Technologies DE... · 4 When air handling unit is non-use, the coil should be filled with water in sum-mer so as to avoid rust corrosion; wa-ter in coil