Greenheck 473501 - Manuals

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 ...

6 Model ERCH-HP Energy Recovery Unit Heat Pump Module Every unit has an integral heat pump module that contains hermetic scroll-type compressor(s), a coaxial refrigerant-to-water heat exchanger(s), refrigerant flow reversing valve(s), expansion valve(s), liquid line filter drier, high pressure manua...

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 sho...

8 Model ERCH-HP Energy Recovery Unit Service Clearances Minimum clearances are required for access on all sides for routine maintenance. Filter replacement, drain pan inspection and cleaning, energy wheel cassette inspection, fan bearing lubrication and belt adjustment are examples of routine mainte...

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 extreme caution to prevent any damage from occurring to the refrigerant system. This unit contains a sys...

10 Model ERCH-HP Energy Recovery Unit E D C A B SIDE OF UNIT ROOF CURB BASE 1 INCH INSULATION Curb Outside Dimensions and Weights 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...

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...

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 rem...

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 energy recovery unit. o Check all fasteners, set-screws, and locking collars on the fans, bearings, drives, motor bases and accessories for ...

14 Model ERCH-HP Energy Recovery Unit Line Voltage. Check at unit disconnect. L1-L2 Volts L2-L3 Volts L1-L3 Volts 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 rotation direction? Supply Fan Yes ...

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 s...

16 Model ERCH-HP Energy Recovery Unit Most factory-supplied electrical components are prewired. To determine what electrical accessories require additional field-wiring, refer to the unit-specific wiring diagram located on the inside of the control center access door.The low voltage control circuit ...

17 Model ERCH-HP Energy Recovery Unit Optional Remote Control Panel and Wiring 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 Terminal ...

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 Typical Control 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 starte...

19 Model ERCH-HP Energy Recovery Unit Electrical Controls Optional Frost Control Extremely cold outdoor air temperatures can cause moisture condensation and frosting on the enthalpy wheel. Frost control is an optional feature that will prevent/control wheel frosting. Three options are available: 1. ...

20 Model ERCH-HP Energy Recovery Unit Optional Economizer The energy wheel operation can be altered to take advantage of economizer operation (free cooling). Two modes are available: 1. De-energizing the wheel. 2. Modulating the wheel. A field-supplied call for cool (Y1) is required. De-energizing t...

21 Model ERCH-HP Energy Recovery Unit Optional Rotation Sensor The rotation sensor monitors energy wheel rotation. 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 co...

22 Model ERCH-HP Energy Recovery Unit Energy Wheel Start-Up If selected, the energy wheel is installed in the unit’s airstream with one half of the wheel in the intake airstream and one half in the exhaust airstream. Air leakage between the two airstreams has to be kept to a minimum and the wheel ha...

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 w...

24 Model ERCH-HP Energy Recovery Unit Every unit has a complete, sealed refrigeration system that is ready for connection to a water source.The heat pump has all the typical DX components and also has refrigerant reversing valve(s) to enable the system to work in both heating and cooling modes. Fact...

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-off 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...

26 Model ERCH-HP Energy Recovery Unit Refrigeration System Schematic Typical Operating Conditions Location Refrigerant State Temperature Pressure Superheat/Subcool Cooling Mode / Refrigerant Properties Before water-to-refrigerant heat exchanger Hot Vapor 150°F 330 PSIG 50°F Superheat After water-to-...

27 Model ERCH-HP Energy Recovery Unit Unit Protection Module (UPM) Fault Indications Each unit includes one Unit Protection Module (UPM) printed circuit board and each UPM has two LED indictor lights. LED Color LED Fault Indication Green Power LED indicates 18-30 VAC present at the board Red Dual or...

28 Model ERCH-HP Energy Recovery Unit Troubleshooting - Controller Alarms The first step in troubleshooting the unit is to check the on-board alarm indicators. Several of the electronic controls in the unit monitor the system for faults and will go into alarm, shutting down the unit or a single func...

29 Model ERCH-HP Energy Recovery Unit Symptom Possible Cause Corrective Action Blower fails to operate Blown fuse or open circuit breaker. Replace fuse or reset circuit breaker and check amps. Defective motor or capacitor. Replace. Motor starter overloaded. Reset starter and check amps. Electrical. ...

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 breaker. Close switch and / or breaker. Compressor contactor not closing. Check voltage to contactor coil, transformer, slave relay, syste...

36 Model ERCH-HP Energy Recovery Unit This unit requires minimal maintenance to operate properly. To ensure proper operation and longevity, the following items should be completed. The items in this list assume a relatively clean air environment, and may require attention more frequently in a dirty ...

37 Model ERCH-HP Energy Recovery Unit Belt Span Deflection = Belt Span 64 When replacing belts on multiple groove 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...

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 ensure proper airflow through the unit. Replacem...

39 Model ERCH-HP Energy Recovery Unit Maintenance Log Date ___________________Time _____________ AM/PMNotes: _______________________________________________________________________________________________________________________________________________________________________________________________...

40 Greenheck warrants this equipment to be free from defects in material and workmanship for a period of one year from the shipment date. The energy recovery wheel is warranted to be free from defects in material and workmanship for a period of five years from the shipment date. Any units or parts w...