Greenheck Fan LFC User's Manual
Contents
1. Date Time AM PM Date Time AM PM Notes Notes Date Time AM PM Date Time AM PM Notes Notes Date Time AM PM Date Time AM PM Notes Notes Date Time AM PM Date Time AM PM Notes Notes Date Time AM PM Date Time AM PM Notes Notes Date Time AM PM Date Time AM PM Notes Notes A Model LFC Low Profile Fan Coil EE Maintenance Log Date Time AM PM Date Time AM PM Notes Notes Date Time AM PM Date Time AM PM Notes Notes Date Time AM PM Date Time AM PM Notes Notes Date Time AM PM Date Time AM PM Notes Notes Date Time AM PM Date Time AM PM Notes Notes Date Time AM PM Date Time AM PM Notes Notes ET Model LFC Low Profile Fan Coil Maintenance Log Date Time AM PM Date Time AM PM Notes Notes Date Time AM PM Date Time AM PM Notes Notes Date Time AM PM Date Time AM PM Notes Notes Date Time AM PM Date Time AM PM Notes Notes Date Time AM PM Date Time AM PM Notes Notes Date Time AM PM Date Time AM PM Notes Notes2. A Model LFC Low Profile Fan Coil ET Warranty Greenheck warrants this equipment to be free from defects in material and workmanship for a period of one year from the shipment date Any units or parts which prove defective during the warranty period will be replaced at our option when returned to our factory transportation prepaid Motors are warranted by the motor manufacturer for a period of one year Should motors furnished by Greenheck prove defective during this period they should be returned to the nearest authorized motor service station Greenheck will not be responsible for any removal or installation costs As a result of our commitment to continuous improvement Greenheck reserves the right to change specifications without notice Greenheck Catalog IAH Series MSCF FC e MSCF BI e AMCA Publication 410 96 Safety Practices for Users and LFC C e VFC FC e VFCD FC provides additional information Installers of Industrial and Commercial Fans provides describing the equipment fan performance available additional safety information This publication can be accessories and specification data obtained from AMCA International Inc at www amca org RB GREENHECK Building Value in Air Phone 715 359 6171 e Fax 715 355 2399 e E mail gfcinfo greenheck com Web site www greenheck com I 464496 LFC Low Profile Fan Coil Rev 1 August 2004 Copyright 2004 Greenheck Fan Corporation
3. F 43 C wide temperature swings may cause condensation and sweating of metal parts All accessories must be stored indoors in a clean dry atmosphere Remove any accumulations of dirt water ice or snow and wipe dry before moving to indoor storage To avoid sweating of metal parts allow cold parts to reach room temperature To dry parts and packages use a portable electric heater to get rid of any moisture build up Leave coverings loose to permit air circulation and to allow for periodic inspection EM Mode LFC Low Profile Fan Coil The unit should be stored at least 3 in 89 mm off the floor on wooden blocks covered with moisture proof paper or polyethylene sheathing Aisles between parts and along all walls should be provided to permit air circulation and space for inspection Inspection and Maintenance during Storage While in storage inspect fans once per month Keep a record of inspection and maintenance performed If moisture or dirt accumulations are found on parts the source should be located and eliminated At each inspection rotate the fan wheel by hand ten to fifteen revolutions to distribute lubricant on motor Every three months the fan motor should be energized If paint deterioration begins consideration should be given to touch up or repainting Fans with special coatings may require special techniques for touch up or repair Machined parts coated with rust preventive should be restored to good
4. H GREENHECK Building Value in Air Part 464496 Low Profile Fan Coil Installation Operation and Maintenance Manual Please read and save these instructions Read carefully before attempting to assemble install operate or maintain the product described Protect yourself and others by observing all safety information Failure to comply with instructions could result in personal injury and or property damage Retain instructions for future reference Model LFC General Safety Information Only qualified personnel should install this unit Personnel should have a clear understanding of these instructions and should be aware of general safety precautions Improper installation can result in electric shock possible injury due to coming in contact with moving parts as well as other potential hazards Other considerations may be required if high winds or seismic activity are present If more information is needed contact a licensed professional engineer before moving forward 1 Follow all local electrical and safety codes as well as the National Electrical Code NEC the National Fire Protection Agency NFPA where applicable Follow the Canadian Electric Code CEC in Canada DANGER Always disconnect power before working on or near a unit Lock and tag the disconnect switch or breaker to prevent accidental power up CAUTION When servicing the unit motor may be hot enough to cause pain or injury Allow motor to
5. Right side connection shown Hot Water 4 Row B Copper Sweat Airflow F Lolo 3 75 A i a Outlet 0 75 7 1 Drain Connection 0 25 vent and drain supplied Right side connection shown Steam 1 and 2 Row B Steel MPT Airflow n A 97 I tolo 1 1 21 1 5 Right side connection shown Outlet 0 75 0 1 Drain Connection 15 res 075 20 1013 075 25 1263 0875 30 1513 0875 45 1513 0875 5 1763 1125 65 2263 1375 85 2263 1375 All dimensions are in inches NOTE Fluid enters the coil from the bottom connection Inlet and exits from the top Outlet as s qp B 35 res ors 20 013 os 25 1263 0 875 30 1513 0875 45 1513 0 875 so raze 1375 es raze 1378 as 2263 1375 All dimensions are in inches With airflow from left to right the fluid enters the coil from the bottom connection Inlet and exits from the top Outlet The other two coil connections should be capped off Cap 65 1319 25 356 F 85 1319 25 356 All dimensions are in inches NOTE Steam enters the coil from the center connection Inlet and exits from the bottom Outle
6. air venting 3 Bucket traps are recommended for use with on off control only 4 Locate traps at least 12 inches below the coil return connection Controls 1 On high pressure installations a two position steam valve with a face and bypass arrangement is preferred where modulating control is required 2 Modulating valves must be sized properly DO NOT UNDERSIZE E Model LFC Low Profile Fan Coil Freezing Conditions entering air below 35 F 1 5 PSI steam must be supplied to the coil at all times 2 Modulating valves are not recommended Control should be by means of face and bypass dampers 3 Provision should always be made to thoroughly mix fresh air and return air before it enters the coil on return air units Also temperature control elements must be properly located to obtain true air mixture temperatures 4 As additional protection against freeze up the trap should be installed sufficiently far below the coil to provide an adequate hydrostatic head to ensure removal of condensate during an interruption in the steam pressure Estimate 3 feet for each 1 PSI of trap differential required 5 On start up admit steam to coil ten minutes before admitting outdoor air 6 Provision must be made to close fresh air dampers if steam supply pressure falls below minimum specified Drain Pan Drain Trap Drain lines and traps should be run full size from the drain pan connection Drain pans should have drain
7. all joints are tight and free of leakage 4 Dual circuits are recommended to be run by two compressors One compressor with the appropriate valves and piping can be used but is not recommended Greenheck does not supply compressor or condensing units for further instruction on DX coil installation and operation contact your compressor and or condenser manufacturer DXI coils have dual connections and should be used with two compressors WARNING Standard unit insulation of 1 5 Ibs density has an insulation R value of 3 7 For applications where the unit discharge temperatures are below 55 F and the unit is installed in a warm humid environment additional insulation may need to be applied to the exterior of the unit to prevent condensation Steam Coils Application Recommendations Satisfactory operation and service life are best ensured when coils are installed with proper piping trap and support arrangement The following LL notes and drawing are L recommended for the coil unit installation and operation General 1 Provide separate supports and hangers for the unit and the piping j geat No FS Strainer Float 8 Thermostat Trap py Gate Valve Control Valve Modulating Two Position Check Valve Vacuum Breaker 2 Be certain that adequate piping flexibility is provided Stresses resulting from expansion of closely coupled piping and coil arrangemen
8. coil connections should be capped off Cap Direct Expansion DXI Dual Circuit with 50 50 Face Interlaced Construction e 4 6 or 8 Row Airflow C Copper Sweat D Copper Sweat Outlet Drain Connection Distributor hookup is done inside module through 2 inch access hole Right side connection shown El Mode LFC Low Profile Fan Coil All dimensions are in inches The first suction header on the entering air side of the coil is circuited to the top distributor With airflow from left to right the fluid enters the coil from the center connection Inlet and exits from the bottom Outlet The other coil connections should be capped off Cap System Start Up For proper unit function and safety follow everything in this start up procedure in the order presented This is to be done after the electrical connections are complete PRE START CHECK LIST 1 Disconnect and lock out all power switches to fan 2 Check all fasteners set screws and locking collars on the fan bearings drive motor base and accessories for tightness 3 Rotate the fan wheel by hand and assure no parts are rubbing 4 Check the V belt drive for proper alignment and tension SPECIAL TOOLS REQUIRED Voltage Meter Tachometer e Amperage Meter 1 Check Voltage Before starting the unit compare the supplied voltage with the unit s nameplate voltage and the motor voltage Units are not provided w
9. condition promptly if signs of rust occur Immediately remove the original rust preventive coating with petroleum solvent and clean with lint free cloths Polish any remaining rust from surface with crocus cloth or fine emery paper and oil Do not destroy the continuity of the surfaces Wipe thoroughly clean with Tectyl 506 Ashland Inc or the equivalent For hard to reach internal surfaces or for occasional use consider using Tectyl 511M Rust Preventive or WD 40e or the equivalent REMOVING FROM STORAGE As units are removed from storage to be installed in their final location they should be protected and maintained in a similar fashion until the equipment goes into operation Prior to installing the unit and system components inspect the unit assembly to make sure it is in working order 1 Check all fasteners set screws on the fan wheel bearings drive motor base and accessories for tightness 2 Rotate the fan wheel s by hand and assure no parts are rubbing Service Clearance Units require service clearance for e filter replacement coil and drain pan inspection cleaning and replacement motor and drive inspection maintenance and replacement Access panels are provided for inspection and cleaning of unit components Allow service clearance of 26 inches for removal of filters Allow a service clearance equal to the unit width for removal of coils and drain pan Table of Contents Installation Unit Lay
10. lines and traps to permit the condensate from the coils to drain freely On all units with drain pans the trap depth and the distance between the trap outlet and the drain pan outlet should be twice the static pressure P in the drain pan section under normal operation to assure the trap remains sealed i 2P minimum f 2P minimum Drain Pan Drain Trap Fan Maintenance Greenheck recommends these procedures to ensure trouble free operation of this unit It is especially important to maintain heater units for clean and efficient operation Most unit failures can be attributed to poor setup or poor maintenance A record of maintenance performed on this unit should be kept This information will provide essential information if problems are encountered A section at the back of this manual is provided for recording the unit s maintenance history CAUTION When performing any maintenance on this unit be sure that the power is disconnected and cannot be accidentally turned on The control center disconnect can be locked in the off position Two Weeks after Start Up Belts Belts tend to stretch after a period of time They should be periodically checked for wear and tightness Approximately 3 8 inch of deflection per ft of span between sheaves is standard for belt tightness When replacing belts use the same type as supplied with the unit Matched belts should always be used on units w
11. opened during system start up to release all of the air from the coil To maintain heat transfer capacity periodically vent any air in the coil Vent is to be located behind the connections side access door Water coils are not normally recommended for use with entering air temperatures below 40 F No control system can be depended on to be 100 safe against freeze up with water coils Glycol solutions or brines are the only safe media for operation of water coils with low entering air conditions WARNING Continuous water circulation through the coil at all times is highly recommended Pipe sizes for the system must be selected on the basis of the head pressure available from the circulation pump Piping should be in accordance with accepted industry standards For chilled water coils the condensate drain pipe should be sized adequately to ensure the condensate drains properly See Drain Pan Traps section and related drawing Direct Expansion DX Coils 1 Piping should be in accordance with accepted industry standards Pipework should be supported independently of the coils Undue stress should not be applied at the connection to coil headers 2 The condensate drain pipe should be sized adequately to ensure the condensate drains properly See Drain Pan Traps section and related drawing 3 When connecting suction and liquid connections make sure the coil is free from all foreign material Make sure
12. Weights Fan w Drain Pan 8 Row 2 in Vertical 4 in Vertical Fan Motor Tota Se Pas 128 so ws 2 3 4 rU RR m S UR RT UR m i 25 vs e 235 3s st 7 1 5s 8 nn 30 199 e 250 45 o oa 129 105 9 15 Pas 25 7s 325 s 70 to 19 195 no v so s 7s a se so 1m is 25 12 wo es aos 75 40 ea oo 143 199 25 14 2 as ao 100 sso zi 100 160 21 25 15 a All weights are shown in pounds Ibs Motor weights may vary depending on enclosure type and horsepower Mounting Dimensions Filter Sizes and Quantity A suec on Horizontal Hanging o fao 9 i9 as fas 1 9 25 40 19 19 38 43 ET 30 45 19 24 a8 48 1 45 as 19 24 so 55 50 48 19 27 50 55 1 Em En 24 x 24 All dimensions are in inches 65 52 19 31 50 55 85 52 19 31 62 67 All dimensions are in inches EN 25 2 S c BA 45 2 50 2 65 MEN ET a 2 EM Model LFC Low Profile Fan Coil H Coil Dimensions Hot Water 1 and 2 Row B Copper Sweat 4 Airflow li A e tolo 3 75 1 1 at 1 5 Outlet 0 75 L 1 Drain Connection 0 25 vent and drain supplied
13. cool before servicing EM Model LFC Low Profile Fan Coil The rotation of the wheel is critical It must be free to rotate without striking or rubbing any stationary objects Motor must be securely and adequately grounded Do not spin fan wheel faster than the maximum cataloged fan rpm Adjustments to fan speed significantly affects motor load If the fan RPM is changed the motor current should be checked to make sure it is not exceeding the motor nameplate amps Do not allow the power cable to kink or come in contact with oil grease hot surfaces or chemicals Replace cord immediately if damaged Verify that the power source is compatible with the equipment Never open blower access doors while the fan is running Receiving Upon receiving the product check to make sure all items are accounted for by referencing the bill of lading to ensure all items were received Inspect each crate for shipping damage before accepting delivery Notify the carrier if any damage is noticed The carrier will make notification on the delivery receipt acknowledging any damage to the product All damage should be noted on all the copies of the bill of lading which is countersigned by the delivering carrier A Carrier Inspection Report should be filled out by the carrier upon arrival and reported to the Traffic Department If damaged upon arrival file claim with carrier Any physical damage to the unit after acceptance is not t
14. demand more energy from the fan and create an environment for odor and bacteria to grow and spread through the conditioned zone High pressure water 400 psi or less may be used to clean coils with fin thickness over 0 006 inches thick Test the spray pressure over a small corner of the coil to determine if the fins will withstand the spray pressure For coils with fragile fins or high fin density foaming chemical sprays and washes are available Many coil cleaners contain harsh chemicals so they must be used with caution by qualified personnel only Care must be taken not to damage the coils including fins while cleaning CAUTION Fin edges are sharp Winterizing Coils Coil freeze up can be caused by such things as air stratification and failure of outdoor air dampers and or preheat coils Routine draining of water cooling coils for winter shutdown cannot be depended upon as insurance against freeze up Severe coil damage may result It is recommended that all coils be drained as thoroughly as possible and then treated in the following manner Fill each coil independently with an antifreeze solution using a small circulating pump and again thoroughly drain Check freezing point of antifreeze before proceeding to next coil Due to a small amount of water always remaining in each coil there will be diluting effect The small amount of antifreeze solution remaining in the coil must always be concentrated enough to prevent fre
15. ers to prevent damage from occurring to the equipment see Figure 1 Avoid twisting or uneven lifting of equipment Do not lift equipment by coil connections or headers The unit must remain upright during lifting All access doors and panels must be closed during lifting to avoid damage Spreader Bar Frame Rails EX NN J X Figure 1 Hanging Instructions The LFC should be hung by the factory supplied lifting lugs or field supplied frame rails as shown respectively in Figures 2 and 3 All hanging brackets must be used to mount the unit The LFC is available with both external neoprene and spring isolation options Figure 2 Figure 3 Model LFC Low Profile Fan Coil IE Unit Dimensions A y O ol J IE J IL Y o 000000 LOOM Top View Elevation View inet ome 35 40 4 4 j a o 3 oo 36 49 675 20 40 4 a ito o 39 120 65 75 l 25 40 4 a 130 160 39 140 89 85 39 a 49 iss 185 39 165 36 90 90 Las 45 4 49 142385 so 165 4 90 100 so 4 s s 1675 210 so 190 48 1025 100 es 5 54 5e 2175 260 so 240 48 120 1275 as 5 54 s airs 20 62 20 oo 120 159 All dimensions are in inches
16. eze up NOTE Carefully read instructions for mixing antifreeze solution used Some products will have a higher freezing point in their natural state than when mixed with water Drain Pan Maintenance Drain pans in any air conditioning unit will have some moisture in them therefore algae and other organisms will grow due to airborne spores and bacteria Periodic cleaning is necessary to prevent this buildup from plugging the drain and causing the drain pan to overflow Inspect twice a year to avoid the possibility of overflow Also drain pans should be kept clean to prevent the spread of disease Cleaning should be performed by qualified personnel EP Model LFC Low Profile Fan Coil Start Up Documentation Job Information Job Name Address City State Zip Phone Number Contact Person Start Up Company Information Service Oranization Address City State Zip Phone Number Fax Number Start Up Date Start Up Personnel Name Nameplate Information Unit Model Number Volts Amps Hertz Mark Phase Fan rpm Unit Serial Number Field Start Up Documentation O Check blower rotation O Check air volume cfm Design Actual O Actual motor voltage O Actual motor hertz O Actual motor phase O Actual motor amps Drive L Fan RPM Range Minimum Maximum Volts Hertz Phase Amps Maintenance Log
17. he responsibility of Greenheck Fan Corporation Unpacking Verify that all required parts and the correct quantity of each item have been received If any items are missing report shortages to your local representative to arrange for obtaining missing parts Sometimes it is not possible that all items for the unit be shipped together due to availability of transportation and truck space Confirmation of shipment s must be limited to only items on the bill of lading Handling Units are to be rigged and moved by the lifting brackets provided or by the skid when a forklift is used Location of brackets varies by model and size Handle in such a manner as to keep from scratching or chipping the coating Damaged finish may reduce ability of unit to resist corrosion Storage Units are protected against damage during shipment If the unit cannot be installed and operated immediately precautions need to be taken to prevent deterioration of the unit during storage The user assumes responsibility of the unit and accessories while in storage The manufacturer will not be responsible for damage during storage These suggestions are provided solely as a convenience to the user INDOOR The ideal environment for the storage of units and accessories is indoors above grade in a low humidity atmosphere which is sealed to prevent the entry of blowing dust rain or snow Temperatures should be evenly maintained between 30 F 7 C and 110
18. ith multigroove pulleys Replacement of belts can be accomplished by loosening the motor to the point where the belts can be removed by hand Do not force belts on or off as this may cause breakage of cords leading to premature belt failure Belts should be adjusted as above Every Three 3 Months Filters The filter in the unit should be inspected at least every three 3 months Depending on the environment filters could require changing or cleaning more or less often The filters can be slid out of either side of the unit Ifwashable filters are installed they can be washed in warm soapy water An adhesive spray can be applied to increase filter efficiency If disposable filters are installed check by holding up to a light source If light cannot pass through the filter it should be replaced Replacement filters should be of the same manufacturer and size When reinstalling filters be sure to install with the airflow in the correct direction indicated on the filter Deflection Belt Span 64 Belt Span NOTE For motors of 1 hp or less a smaller sliding base bracket is used to attach to blower Yearly Bearings Most bearings are permanently lubricated and require no further lubrication under normal use Normal use being considered 20 F to 120 F and in a relatively clean environment Some bearings are relubricatable and will need to be regreased depending on fan use Check your bearings for grease fittings
19. ith thermal overload protection unless a control center has been ordered with the unit or the motor has been selected with thermal overload protection 2 Check Blower Rotation If the blower is rotating in the wrong direction the unit will move some air but will not perform properly To check the rotation open the blower access door and run the blower momentarily to determine the rotation ON pt o AIRFLOW To reverse the rotation turn the power off and use the following procedure e For single phase units rewire the motor per the instructions on the motor e For three phase units interchange any two power leads This can be done at the motor starter 3 Check for Vibration Check for unusual noise vibration or overheating of bearings Excessive vibration maybe experienced during initial start up Left unchecked excessive vibration can cause a multitude of problems including structural and or component failure Many conditions can be discovered by careful observation If the problem is wheel unbalance in place balancing can be done providing there is access to the fan wheel Generally fan vibration and noise is transmitted to other parts of the building by the ductwork If noise is an issue we recommend using heavy canvas connections on the inlet of the fan Refer to the Troubleshooting section of this manual if a problem develops IB 4 Air Volume Check and Measurement Along with the building balance
20. ould be lower Blower rotation is incorrect Check rotation and correct Motor overamps Motor voltage incorrect Check motor nameplate and supplied voltage Motor horsepower too low See specifications and catalog for fan curves to determine if horsepower is sufficient Shorted windings in motor Replace motor Mixing box damper not fully open Adjust damper linkage or replace damper motor System static pressure too high Improve ductwork to eliminate losses using good duct practices Blower speed too low Check for correct drives and RPMs with catalog data Mixing box dampers closed Open and adjust Insuficient euro Dirty or clogged filters Clean or replace Leaks in ductwork Repair Elbows or other obstructions may restrict fan outlet Correct or improve ductwork Belt slippage Adjust belt tension Blower fan speed too high Check for correct fan RPM Too mush aitlow Filter s not in place Install filters Insufficient static pressure airflow resistance Induce static pressure into system ductwork Wheel rubbing on housing Center wheel Loose wheel on shaft Tighten wheel setscrew Loose motor or blower sheave Belts too loose Tighten sheave setscrew Adjust belt tension after 24 hours of operation Loosen to maintain 3 8 inch deflection per ft of span Beltstoo tight between sheaves Worn belt Replace Exces
21. out eR hne 3 Lifting Hanging Instructions 3 Dimensions Weights 4 Filter Sizes Quantity 4 Coil Dimensions 5 6 Start Up System Start Up 7 Troubleshooting BIOWOEN 2 25 css arr RR AREE daaraan 8 Motor Overamps 8 Insufficient Too Much Airflow 8 Excessive Noise or Vibration 8 Start Up Coil Module 9 10 Drain Pan Drain Trap 10 Maintenance Fark sss w b mh ke ay AAA ave su s ma 11 GOU iiss ao oe a no een Saale be 12 Drain Pan Rx ERE ERE 12 Reference Start Up Documentation 12 Maintenance Log 13 15 Warranty s aa nnn Backcover Unit Layout Airflow 4 n PO 1 Fan Section 2 Coil Section e Chilled Water e Hot Water e DX Coils e Steam Coils 3 Inlet Filter Vertical inlet filter with quarter turn fasteners 4 Lifting Lugs Hanging Brackets Six 6 lifting lugs for each unit 5 Side Access Panels Right and left access to each unit Image shows panels removed 6 1 inch knockout is provided for the recommended electrical wiring penetration or disconnect switch Lifting Instructions Greenheck s Low Profile Fan Coil LFC should be lifted by the factory supplied lifting lugs or frame rails and a spreader bar by oth
22. sive noise or vibration Motor base or blower loose Tighten mountings bolts Worn bearings Replace Bearing and drive alignment Realign Motor out of balance Replace Wheel out of balance Replace or rebalance Sheaves eccentric or out of balance Replace or rebalance Accumulation of material on wheel Clean wheel and housing EM Mode LFC Low Profile Fan Coil Start Up of Coil Module Hot Water Chilled Water Coils 1 Piping should be in accordance with accepted industry standards Pipework should be supported independently of the coils Water pipes are copper with sweat connections USE WET TOWEL TO AVOID BURNING COIL CONNECTION GROMMETS When installing coupling do not apply undue stress to the connection extending through the unit Use a back up pipe wrench to avoid breaking the weld between coil connection and header Connect the water supply to the bottom connection on the air leaving side and the water return to the top connection on the air entering side The extra bottom connection can be used for an auxiliary manual drain connection and the extra top connection may be used for an automatic air vent or the extra connections can be capped To ensure proper venting an external air vent in the piping is recommended Connecting the supply and or return in any other manner will result in very poor performance CAP UNUSED CONNECTIONS The air vent at the uppermost point should be temporarily
23. t Model LFC Low Profile Fan Coil JJ Chilled Water 4 6 or 8 Row B Copper Sweat Airflow 3 Outlet 0 75 t h 1 5 Drain Connection 0 25 vent and drain supplied Right side connection shown Direct Expansion DX Single Circuit 4 6 or 8 Row B Copper Sweat C Copper Sweat Outlet L 0 75 O0 zu L aa ap Drain Connection Distributor hookup is done inside module through 2 inch access hole Right side connection shown 15 763 075 075 1375 20 1013 075 075 1375 25 1263 0 875 0 875 1375 30 1513 0875 0 875 1 375 50 1763 1375 1375 1625 65 2263 1375 1375 1625 85 2263 1375 1375 1625 All dimensions are in inches With airflow from left to right the fluid enters the coil from the bottom connection Inlet and exits from the top Outlet The other two coil connections should be capped off Cap 0 625 0 625 0 625 0 625 0 625 1 375 20 7 0 0 625 0 625 0 625 0 625 0 625 1 375 50 10 75 0 875 1 375 1 125 1 375 0 875 1 625 65 13 00 1 125 1 375 1 125 1 375 1 125 1 625 85 13 00 1 125 1 375 1 125 1 375 1 125 1 625 All dimensions are in inches With airflow from left to right the fluid enters the coil from the center connection Inlet and exits from the bottom Outlet The other
24. t can cause serious damage Model LFC Low Profile Fan Coil lE Steam Coils General continued 3 Standard steam coils are pitched in the casings when installed for horizontal airflow The casing must be level after the unit is installed for proper condensate drainage If condensate is not removed the coil will suffer from water hammering and will have a shortened life On vertical airflow applications the coils must be pitched when installed 4 Do not reduce pipe size at the coil return connection Carry return connection size through the dirt pocket making the reduction at the branch leading to the trap 5 It is recommended that vacuum breakers be installed on all applications to prevent retaining condensate in the coil Generally the vacuum breaker is to be connected between the coil inlet and the return main The vacuum breaker should be open to the atmosphere and the trap design should allow venting of large quantities of air 6 Do not attempt to lift condensate when using modulating or on off control 7 Do not reduce the pipe size leaving the coil Traps 1 Size traps in accordance with the manufacturer s recommendations Be certain that the required pressure differential will always be available DO NOT UNDERSIZE 2 Float and thermostatic or bucket traps are recommended for low pressure steam On high pressure systems bucket traps are normally recommended The thermostatic traps should be used only for
25. the unit s air volume cfm should be measured and compared with its rated air volume This unit is flexible for varying air volume but the actual air volume should be known for making final adjustments The most accurate way to measure the air volume is by using the pitot traverse method in the ductwork away from the blower Other methods can be used but should be proven and accurate To adjust the air volume change the fan rpm or the system losses See Troubleshooting section in this guide 5 Measure Motor Voltage Amperage and Fan RPM All access doors must be installed Measure and record the input voltage and motor amperage s To measure the fan RPM the blower door will need to be removed Minimize measurement time because the motor may over amp with the door removed Compare measured amps to the motor nameplate full load amps and correct if over amping See the Troubleshooting section in this guide Model LFC Low Profile Fan Coil Troubleshooting Symptom Possible Cause Corrective Action Blown fuse or open circuit breaker Replace fuse or reset circuit breaker and check amps Blower fails to Broken fan belt Replace operate Defective motor or capacitor Replace Motor starter overloaded Reset starter and check amps Airflow too high Check airflow and adjust drives if needed Static pressures are higher or lower than design If higher ductwork should be improved If lower fan RPMs sh
26. to find out what type of bearing you have If your fan is not being operated under normal use bearings should be checked monthly for lubrication Motors Motor maintenance is generally limited to cleaning and lubrication where applicable Cleaning should be limited to the exterior surfaces only Removing dust and grease buildup on motor housing assures proper motor cooling Greasing of motors is intended only when grease fittings are provided Many fractional motors are permanently lubricated and require no further lubrication Motors supplied with grease fittings should be greased in accordance with manufacturer s recommendations When motor temperature does not exceed 104 F 40 C the grease should be replaced after 2000 hours of running time as a general rule Wheels Wheels require very little attention when moving clean air Occasionally oil and dust may accumulate on the wheel causing imbalance When this occurs the wheel and housing should be cleaned to assure smooth and safe operation Inspect fan impeller and housing for fatigue corrosion or wear Routinely check all fasteners set screws and locking collars on the fan bearing drive motor base and accessories for tightness Model LFC Low Profile Fan Coil KE Coil Maintenance Coils must be clean to obtain maximum performance Check once a year under normal operating conditions and if dirty brush or vacuum clean Soiled fins reduce the capacity of the coil
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