Greenheck Fan 473501 manual

1 Model ERCH-HP Energy Recovery Unit ® Installation, Operation and Maintenance Manual Please read and save these instructions. Read car efully before attempting to assemble, install, operate or maintain the product described. Pr otect yourself and others by observing all safety information. Failure to comply with instructions could result in perso[...]

2 Model ERCH-HP Energy Recovery Unit Receiving Upon receiving the pr oduct, check to make sure all items are accounted for by r eferencing the bill of lading to ensure all items wer e 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 d[...]

3 Model ERCH-HP Energy Recovery Unit T able of Contents General Safety Information .................... 1 Receiving, Handling and Storage ............... 2 Product Overview ............................ 4 Models and Capacities ........................ 4 Subassemblies Coils ...................................... 5 Dampers ............................[...]

4 Model ERCH-HP Energy Recovery Unit Models and Capacities This unit is manufactured in four dif ferent platform sizes; 20, 45, 55 and 90. Each platform has multiple options for heating and cooling capacities. All 4, 5 and 6 ton capacity units have a single scroll type compressor and all other units have two scr oll type compressors and use a split[...]

5 Model ERCH-HP Energy Recovery Unit Coils The airside coil is connected to the heat pump compressor(s) and is the primary vehicle for heating and cooling of the building. A reheat coil is optionally available and is installed in the supply airstream adjacent to the airside coil. The reheat coil is also connected to the heat pump but is used only w[...]

6 Model ERCH-HP Energy Recovery Unit Heat Pump Module Every unit has an integral heat pump module that contains hermetic scroll-type compr essor(s), a coaxial refrigerant-to-water heat exchanger(s), r efrigerant flow reversing valve(s), expansion valve(s), liquid line filter drier , high pressure manual r eset cutout, crankcase heater(s) and vari[...]

7 Model ERCH-HP Energy Recovery Unit Installation Model Overall Exterior Dimensions Width (including Lifting Lugs) Overall Width (with Exhaust Hood) Overall Length (with Outdoor Air Hood) ERCH-HP 20 59.5 75 116 ERCH-HP 45 69.5 86 122 ERCH-HP 55 79.5 101 134 ERCH-HP 90 99.5 123 147 All dimensions shown are in inches. Unit Size U V Approximate W eigh[...]

8 Model ERCH-HP Energy Recovery Unit Service Clearances Minimum clearances are r equired for access on all sides for r outine maintenance. Filter r eplacement, drain pan inspection and cleaning, ener gy wheel cassette inspection, fan bearing lubrication and belt adjustment are examples of routine maintenance that must be performed. Blower and motor[...]

9 Model ERCH-HP Energy Recovery Unit Handling While this unit was constructed with quality and dependability in mind, damage still may occur during handling of the unit for installation. Exercise extr eme caution to prevent any damage fr om occurring to the refrigerant system. This unit contains a system pressurized with r efrigerant that, if damag[...]

10 Model ERCH-HP Energy Recovery Unit E D C A B SIDE OF UNIT ROOF CURB BASE 1 INCH INSULA TION Curb Outside Dimensions and W eights Curb Cap Dimensions Unit Size A B C D E ERCH-HP 20 2.00 2.00 1.00 0.88 0.75 ERCH-HP 45 2.00 4.25 2.00 1.31 0.50 ERCH-HP 55 2.00 4.25 2.00 1.31 0.50 ERCH-HP 90 2.00 4.25 2.00 1.31 0.50 All dimensions are in inches. Curb[...]

11 Model ERCH-HP Energy Recovery Unit Rail Mounting Unit Size A B ERCH-HP 20 5.0 41.0 ERCH-HP 45 7.0 41.9 ERCH-HP 55 5.5 53.0 ERCH-HP 90 6.0 59.0 All dimensions are in inches. Rail Mounting / Layout • Rails designed to handle the weight of the unit should be positioned as shown on the diagram (rails by others). • Make sure that rail positioning[...]

12 Model ERCH-HP Energy Recovery Unit Start-Up Unit DANGER Electric shock hazard. Can cause injury or death. Before attempting to perform any service or maintenance, turn the electrical power to unit to OFF at disconnect switch(es). Unit may have multiple power supplies. CAUTION Use caution when removing access panels or other unit components, espe[...]

13 Model ERCH-HP Energy Recovery Unit Pre-Start-Up Checklist o Disconnect and lock-out all power switches. o Remove any foreign objects that are located in the ener gy recovery unit. o Check all fasteners, set-screws, and locking collars on the fans, bearings, drives, motor bases and accessories for tightness. o Rotate the fan wheels and energy [...]

14 Model ERCH-HP Energy Recovery Unit Line V oltage. Check at unit disconnect. L1-L2 V olts L2-L3 V olts L1-L3 V olts Motor Amp Draw Supply Motor Amps L1 Amps L2 Amps L3 Amps Exhaust Motor Amps L1 Amps L2 Amps L3 Amps Fan RPM Supply Fan RPM Exhaust Fan RPM Correct fan r otation direction? Supply Fan Y es / No Exhaust Fan Y es / No Energy Wheel Moto[...]

15 Model ERCH-HP Energy Recovery Unit Electrical Information Determine the Size of the Main Power Lines The unit’ s nameplate states the voltage and the unit’ s MCA. The main power lines to the unit should be sized accordingly . The nameplate is located on the outside of the unit on the control panel side. Determine the Size of Electric Heater [...]

16 Model ERCH-HP Energy Recovery Unit Most factory-supplied electrical components are prewir ed. T o determine what electrical accessories requir e additional field-wiring, refer to the unit-specific wiring diagram located on the inside of the control center access door . The low voltage control cir cuit is 24 V AC and contr ol wiring should not [...]

17 Model ERCH-HP Energy Recovery Unit Optional Remote Contr ol Panel and W iring Schematics Indicator Lights powered by the ER Unit Dirty Filter Indicator (power by others) Heating/Cooling Switches and Night Setback Switch/Timer 7-Day Timer or On/Off Switch G C R 7-Day Timer S1 - Unit On/Off T erminal Block in Unit Control Center For 7-Day Timer , [...]

18 Model ERCH-HP Energy Recovery Unit 1 8 7 5 6 17 16 15 14 13 12 11 10 18 2 3 4 9 T ypical Contr ol Center Components - individual components and locations will vary Refer to “Heat Pump System” section for components in compressor compartment 1. Main disconnect (non-fusible, lockable) 2. Motor starter - exhaust air fan 3. Motor starter - outdo[...]

19 Model ERCH-HP Energy Recovery Unit Electrical Contr ols Optional Frost Contr ol Extremely cold outdoor air temperatur es can cause moisture condensation and fr osting on the enthalpy wheel. Frost contr ol is an optional feature that will prevent/contr ol wheel frosting. Thr ee options ar e available: 1. Timed Exhaust frost control 2. Electric pr[...]

20 Model ERCH-HP Energy Recovery Unit Optional Economizer The ener gy wheel operation can be altered to take advantage of economizer operation (free cooling). T wo modes are available: 1. De-energizing the wheel. 2. Modulating the wheel. A field-supplied call for cool (Y1) is requir ed. De- ener gizing the wheel is accomplished with a signal from [...]

21 Model ERCH-HP Energy Recovery Unit Optional Rotation Sensor The rotation sensor monitors ener gy wheel r otation. If the wheel should stop rotating, the sensor will close a set of contacts in the unit control center . Field-wiring of a light (or other alarm) between terminals R and 12 in the unit control center will notify maintenance personnel [...]

22 Model ERCH-HP Energy Recovery Unit Ener gy Wheel Start-Up If selected, the ener gy wheel is installed in the unit’ s airstream with one half of the wheel in the intake airstream and one half in the exhaust airstr eam. Air leakage between the two airstreams has to be kept to a minimum and the wheel has air seals that must be adjusted for that p[...]

23 Model ERCH-HP Energy Recovery Unit Energy Wheel Maintenance Inspection The wheel should be inspected semiannually in accordance with the maintenance schedule. Maintenance of the wheel consists mainly of inspecting the wheel for cleanliness and then checking the drive motor , belt, and pulley for wear . If the wheel layers appear dirty , the whee[...]

24 Model ERCH-HP Energy Recovery Unit Every unit has a complete, sealed refrigeration system that is ready for connection to a water sour ce. The heat pump has all the typical DX components and also has refrigerant r eversing valve(s) to enable the system to work in both heating and cooling modes. Factory-Installed Heat Pump System Components: Ther[...]

25 Model ERCH-HP Energy Recovery Unit Crankcase Heater A crankcase heater is installed around the base of each compressor in the unit to boil-of f any liquid refrigerant that may be absorbed into the oil during idle periods. It is recommended the heater operate 24 hours prior to the compressors being started. Heat Pump Contr ols Each unit is factor[...]

26 Model ERCH-HP Energy Recovery Unit Refrigeration System Schematic T ypical Operating Conditions Location Refrigerant State T emperature Pr essure Superheat/Subcool Cooling Mode / Refrigerant Properties Before water -to-refrigerant heat exchanger Hot V apor 150°F 330 PSIG 50°F Superheat After water -to-r efrigerant heat exchanger W arm Liquid 8[...]

27 Model ERCH-HP Energy Recovery Unit Unit Pr otection Module (UPM) Fault Indications Each unit includes one Unit Protection Module (UPM) printed circuit boar d and each UPM has two LED indictor lights. LED Color LED Fault Indication Green Power LED indicates 18-30 V AC present at the board Red Dual or Single Compressor # of blinks Status Dual Comp[...]

28 Model ERCH-HP Energy Recovery Unit T r oubleshooting - Contr oller Alarms The first step in troubleshooting the unit is to check the on-board alarm indicators. Several of the electr onic controls in the unit monitor the system for faults and will go into alarm, shutting down the unit or a single function within the unit. DDC Controller Check th[...]

29 Model ERCH-HP Energy Recovery Unit Symptom Possible Cause Corrective Action Blower fails to operate Blown fuse or open circuit br eaker . Replace fuse or reset cir cuit breaker and check amps. Defective motor or capacitor . Replace. Motor starter overloaded. Reset starter and check amps. Electrical. Check for On/Off switches. Check for corr ect [...]

30 Model ERCH-HP Energy Recovery Unit T r oubleshooting – Unit Symptom Possible Cause Corrective Action Motor over amps CFM too high. Check cfm and adjust drives if needed. Static pressur es are higher or lower than design. If higher , ductwork should be improved. If lower , fan rpm should be lower . Blower rotation is incorr ect. Check rotation [...]

31 Model ERCH-HP Energy Recovery Unit Symptom Possible Cause Corrective Action Compressor will not run or does not try to start Open disconnect switch or circuit br eaker . Close switch and / or breaker . Compressor contactor not closing. Check voltage to contactor coil, transformer , slave relay , system. Replace parts as necessary . Blown fuse or[...]

32 Model ERCH-HP Energy Recovery Unit T r oubleshooting – Refrigeration Cir cuit Symptom Possible Cause Corrective Action Compressor starts but cuts out on high pressur e switch High pressur e activates at 600 PSIG for R410A Refrigerant overchar ge. Check pressur es, char ge by subcooling. Condenser fan motor defective. Check fan motor . Condense[...]

33 Model ERCH-HP Energy Recovery Unit T r oubleshooting – Refrigeration Cir cuit Symptom Possible Cause Corrective Action Compressor noisy or vibrating Refrigerant overchar ge. Check pressur es and subcooling. Liquid floodback. Check thermal expansion valve setting. Check for refrigerant over char ge. T ubing rattle. Dampen tubing vibration by ta[...]

34 Model ERCH-HP Energy Recovery Unit T r oubleshooting – Refrigeration Cir cuit Symptom Possible Cause Corrective Action Low suction pressur e Refrigerant underchar ge. Check pressur es and subcooling. Blower running backward. Interchange any two wir es from 3 phase disconnect. Loose blower , pulley or belts. Check drive pulley alignment, belt t[...]

35 Model ERCH-HP Energy Recovery Unit T r oubleshooting – Refrigeration Cir cuit Symptom Possible Cause Corrective Action Low or no oil pressur e Low oil level (trapped oil in evaporator or suction line). Thoroughly defr ost evaporator . After defrost, observe level, add oil. Check for leaks. Check lines for proper slope and traps. Excessive liqu[...]

36 Model ERCH-HP Energy Recovery Unit This unit requir es minimal maintenance to operate properly . T o ensure proper operation and longevity , the following items should be completed. The items in this list assume a relatively clean air envir onment, and may requir e attention more fr equently in a dirty or dusty area. If this unit contains an ind[...]

37 Model ERCH-HP Energy Recovery Unit Belt Span Deflection = Belt Span 64 When replacing belts on multiple gr oove drives, all belts should be changed to provide uniform drive loading. Do not pry belts on or off the sheave. Loosen belt tension until belts can be removed by simply lifting the belts of f the sheaves. After replacing belts, insur e th[...]

38 Model ERCH-HP Energy Recovery Unit Internal Filter Maintenance The unit will typically be provided with 2-inch, pleated filters in the supply airstream. These filters should be checked per a routine maintenance schedule and replaced as necessary to ensur e proper airflow through the unit. Replacement filters shall be of same performance and [...]

39 Model ERCH-HP Energy Recovery Unit Maintenance Log Date ___________________Time _____________ AM/PM Notes: ___________________________________________ _________________________________________________ _________________________________________________ _________________________________________________ ______________________________________________[...]

40 Greenheck warrants this equipment to be fr ee from defects in material and workmanship for a period of one year from the shipment date. The ener gy r ecovery wheel is warranted to be free fr om defects in material and workmanship for a period of five years from the shipment date. Any units or parts which pr ove defective during the warranty per[...]