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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

Amps

Exhaust Motor Amps

Amps

Fan RPM

Supply Fan RPM

Exhaust Fan RPM

Correct fan rotation direction?

Supply Fan

Yes / No

Exhaust Fan

Yes / No

Energy Wheel Motor

Amps

Compressors

Compressor 1

Amps

Crankcase Heater

Amps

Compressor 2

Amps

Crankcase Heater

Amps

Condensing Fans

Condensing Fan 1

Amps

Condensing Fan 2

Amps

Condensing Fan 3

Amps

Outdoor Air Temperature

Deg F

Return Air Temperature

Deg F

Outdoor Air Relative Humidity

% RH

Return Air Relative Humidity

% RH

Superheat

Deg F

Should be between 8º and 12ºF

Subcooling

Deg F

Should be between 12º and 17ºF

Discharge Pressure

PSIG

Should be between 200 and 280 PSIG for R22 or 300 and 500 PSIG for R410a

Suction Line Pressure

PSIG

Should be between 60 and 80 PSIG for R22 or 100 and 135 PSIG for R410a

Liquid Line Temp

Deg F

Suction Line Temp

Deg F

Moisture Indicating Sight Glass

Liquid Visible? Yes / No

Color of Center Dot: Green / Yellow

Hot Gas Bypass Operational

Yes / No

Unit Start-Up Checklist

Содержание ERCH-HP

Страница 1: ...n Electric Code CEC in Canada 2 All moving parts must be free to rotate without striking or rubbing any stationary objects 3 Unit must be securely and adequately grounded 4 Do not spin fan wheel faster than maximum cataloged fan RPM Adjustments to fan speed significantly affect motor load If the fan RPM is changed the motor current should be checked to make sure it is not exceeding the motor namep...

Страница 2: ...to keep from scratching or chipping the coating Damaged finish may reduce ability of the 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 manufact...

Страница 3: ... Plumbing Piping Overview Condensate Drain Trap 16 Optional Remote Control Panel and Wiring Schematics 17 Typical Control Center Components 18 Electrical Controls Optional Frost Control 19 Optional Economizer 20 Phase Monitor 20 Variable Frequency Drive 20 Optional Rotation Sensor 21 Dirty Filter Sensor 21 Energy Wheel Start Up 22 Sequence of Operation 22 Maintenance 23 Troubleshooting 24 Heat Pum...

Страница 4: ...thus reclaiming energy already expended to heat the building air In addition to the energy wheel this unit incorporates a packaged water source heat pump The heat pump system comes from the factory fully charged with refrigerant and is ready for connection to a water source upon arrival For purposes of providing temporary emergency heat an optional secondary heating source such as indirect gas fur...

Страница 5: ...ments which can be removed for servicing Motorized Recirculating Air Damper Motorized Outdoor Air Intake Damper Wheel Cassette Coil Section Exhaust Hood Ooutdoor Air Hood Exhaust Air Intake Electrical Box Filters Filters Indirect Gas Heater Motorized Exhaust Air Damper Gravity Type Exhaust Damper Dampers There are four locations where dampers are optionally installed Optional Heat Pump Reheat Coil...

Страница 6: ...larm conditions and also power status A unit specific schematic for electrical circuits is located in the control center and another unit specific schematic for heat pump circuitry is located in the heat pump module Unit Protection Module UPM Refrigerant Reversing Valves Water Intake and Discharge Connections Coaxial Refrigerant to Water Heat Exchangers High Efficiency Scroll Type Compressors Heat...

Страница 7: ...n with weatherhoods filters outdoor air damper six row DX coil integral condensing section and an indirect gas fired furnace Supply Discharge Exhaust Intake U V 1 2 inch 1 2 inch 1 2 inch Position the unit roof opening such that the supply discharge and exhaust inlet of the unit will line up with the corresponding ductwork Be sure to allow for the recommended service clearances when positioning op...

Страница 8: ...H HP 90 Clearances for service and component removal on ERCH HP 20 and ERCH HP 45 Clearance for energy wheel removal on ERCH HP 20 Clearance for energy wheel removal on ERCH HP 45 Clearances for service and component removal on ERCH HP 55 and ERCH HP 90 WHEEL CASSETTE COIL SECTION ACCESS PANEL ACCESS PANEL ACCESS PANEL ACCESS PANEL ACCESS PANEL ACCESS PANEL ACCESS PANEL EXHAUST HOOD OUTDOOR AIR HO...

Страница 9: ...on Unit Weights and Recommended Roof Opening section of this manual 3 Unit must be lifted by all lifting lugs provided on base structure 4 Rigger to use suitable mating hardware to attach to unit lifting lugs 5 Spreader bar s must span the unit to prevent damage to the cabinet by the lift cables 6 Always test lift the unit to check for proper balance and rigging before hoisting to desired location...

Страница 10: ...embers of the building Factory Supplied Roof Curbs Roof curbs are Model GKD which are shipped in a knockdown kit includes duct adapter and require field assembly by others Assembly instructions are included with the curb Install Curb Locate curb over roof opening and fasten in place Reference Installation Unit Weights and Recommended Roof Openings in this manual Check that the diagonal dimensions ...

Страница 11: ... 36 ERCH HP 45 10 20 x 20 36 ERCH HP 55 12 20 x 20 36 ERCH HP 90 15 28 x 28 60 All dimensions shown in inches Recommended duct sizes are based on velocities across the cfm range of each model at approximately 800 feet per minute FPM at minimum airflow and up to 1600 fpm at maximum airflow Recommended duct sizes are only intended to be a guide and may not satisfy the requirements of the project Ref...

Страница 12: ...erature is below 40ºF Do not short cycle the compressor Allow 5 minutes between on cycles to prevent compressor damage Prior to starting up the unit power must be energized for 24 hours without a call for cooling to allow the compressor crankcase heaters time to boil off any liquid refrigerant present in the compressor DX system is charged with refrigerant Start up must be performed by EPA Certifi...

Страница 13: ...his unit refer to the maual provided with this unit for Pre Start Up information o This unit contains a crankcase heater for each compressor which needs power supplied to it 24 hours prior to start up If start up is scheduled in 24 hours unlock the disconnect power and energize unit SPECIAL TOOLS REQUIRED Voltage Meter with wire probes Amperage Meter Pressure Gauges refrigerant Tachometer Thermome...

Страница 14: ...g Fan 1 L1 Amps L2 Amps L3 Amps Condensing Fan 2 L1 Amps L2 Amps L3 Amps Condensing Fan 3 L1 Amps L2 Amps L3 Amps Outdoor Air Temperature Deg F Return Air Temperature Deg F Outdoor Air Relative Humidity RH Return Air Relative Humidity RH Superheat Deg F Should be between 8º and 12ºF Subcooling Deg F Should be between 12º and 17ºF Discharge Pressure PSIG Should be between 200 and 280 PSIG for R22 o...

Страница 15: ... MOP Unit s Total MCA SUP HP MCA EXH HP MOP VOLTS HZ PH Voltage Hertz Phase Electrical Nameplate Remote Panel Room Temperature Sensor Room Dehumidistat Discharge Temperature Sensor WARNING The roof lining contains high voltage wiring To prevent electrocution do not puncture the interior or exterior panels of the roof WARNING To prevent injury or death due to electrocution or contact with moving pa...

Страница 16: ...sure proper drainage of condensate while maintaining internal static pressures A P trap assembly kit is supplied with each unit and is to be assembled and installed as local conditions require and according to the assembly instructions provided with the P trap If local and area codes permit the condensate may be drained back onto the roof but a drip pad should be provided beneath the outlet If loc...

Страница 17: ...The remote panel is a series of junction boxes ganged together and includes a stainless steel faceplate The remote panel is available with a number of different alarm lights and switches to control the unit The remote panel ships loose and requires mounting and wiring in the field The remote panel is available with the following options Unit on off switch Unit on off light 7 day time clock Hand of...

Страница 18: ...tor starter outdoor air fan 4 Motor contactor energy wheel 5 24 VAC control transformer 6 24 VAC terminal strip 7 Fuses for blower motors 8 Grounding lug 9 Distributor block 10 Compressor fuse blocks 11 Terminal block Optional Control Center Components 12 DDC controller 13 Dirty filter pressure switches 14 Economizer module 15 Thermostats for Economizer module Energy recovery wheel frost control 1...

Страница 19: ...mer Scale Dip Switch Timer Turn the temperature sensor up as high as possible The supply blower should cycle on for one minute then turn off for one minute After testing set the Timer Scale as follows T1 10 minutes T2 1 hour Set the Timer Settings as follows T1 0 5 T2 0 5 The timer is now set for 5 minutes off and 30 minutes on Remember to remove the jumper Electric preheat frost control includes ...

Страница 20: ...hould not rotate Turn unit power off Reconnect 620 ohm resistor to terminal Sr on the enthalpy controller Turn unit power on The LED on the enthalpy controller should not light and the energy recovery wheel should energize and rotate If the steps above provide the results described the enthalpy economizer is working properly Turn unit power off Reconnect C7400 solid state enthalpy sensor to termin...

Страница 21: ...compartment next to the unit control center or in unit control center To adjust the switch the unit must be running with all of the access doors in place except for the compartment where the switch is located exhaust intake compartment The adjusting screw is located on the top of the switch Open the filter compartment and place a sheet of plastic or cardboard over 50 of the filter media Replace th...

Страница 22: ... the outside air is 40 F 2 F hysteresis adjustable the unit is operating in dehumidification mode or there is a call for heating Stop Wheel When economizer mode is enabled and there is a signal for cooling the wheel will stop rotating to allow free cooling Modulate Wheel When economizer mode is enabled and there is a signal for cooling the wheel VFD modulates wheel speed to maintain the discharge ...

Страница 23: ... If the wheel should rotate when a clip is open the clip will jam against the bearing support bar and could cause damage Cleaning Maintenance or cleaning of the wheel segments should be done with the segments removed from the wheel cassette to avoid splashing liquids or cleaning agents inside the cabinet If the energy wheel appears excessively dirty it should be cleaned to ensure maximum operating...

Страница 24: ...ng the thermal expansion valve It is located in the compressor compartment Hot Gas Bypass Valve On units equipped with hot bypass hot gas from the compressor is injected into the liquid line of the airside coil after the TXV This process starts when suction gas temperatures drop below 28ºF which is 32º 34ºF coil surface temperature Hot gas helps the airside coil from freezing up and the compressor...

Страница 25: ...out protection in the UPM board will shut down the unit if the incoming power falls below 18 VAC The unit will remain off until a minimal incoming power of 18 VAC is detected Once proper power is restored the unit will start up within the random start time period Malfunction Output The controller has a set of wet contacts for remote fault indication or dry contacts for communication with a DDC con...

Страница 26: ...or 55 F 145 PSIG 10 F Superheat Water entering the coaxial heat exchanger is warmed by the heat it absorbs from the refrigerant and leaves about 10 F warmer Location Refrigerant State Temperature Pressure Superheat Subcool Heating Mode Refrigerant Properties Before Airside Coil Hot Vapor 130 F 250 PSIG 50 F Superheat After Airside Coil Warm Liquid 65 F 250 PSIG 15 F Subcool After Thermostatic Expa...

Страница 27: ...AC voltage to R and C terminals below 18 VAC Intelligent Reset If a fault condition is initiated the five minute delay on break time period and the random start timer is initiated and the unit will restart after these delays expire During this period the fault LED will indicate the cause of the fault If the fault condition occurs 2 or 4 times depending on 2 or 4 setting for Lockout dip switch befo...

Страница 28: ...odes and see the unit specific wiring diagram Phase Monitor The phase monitor has two LED indicator lights one red and one green Green indicates proper operational status red indicates the unit has detected a fault and is in alarm condition Variable Frequency Drive VFD Variable frequency drives have a display screen that will show an alarm condition If a fault such as a voltage spike occurs the VF...

Страница 29: ...upply power or use a special control transformer which is sized for the actual supply power Always have a completed Pre Start Up Checklist and Unit Start Up Checklist prior to requesting parts or service information Troubleshooting Unit Troubleshooting Airflow The Test and Balance Report TAB is utilized to determine whether the appropriate amount of outdoor air and exhaust air is being supplied an...

Страница 30: ...k Belt slippage Adjust belt tension High airflow cfm Blower fan speed too high Check for correct fan rpm Decrease fan speed if necessary Filter s not in place Install filters Insufficient static pressure Ps airflow resistance Induce Ps into system ductwork Make sure grilles and access doors are installed Decrease fan speed if necessary Excessive noise or vibration Fan wheel rubbing on inlet Adjust...

Страница 31: ... proper wait for thermostat to close Loose wiring Check all wire terminals and tighten as necessary Compressor starts but cuts out on low pressure Low pressure switch activates at 50 PSIG for R 410A Low refrigerant charge Check refrigerant pressures Airflow restricted Check for dirty evaporator coil dirty filters dampers closed iced evaporator coil improper belt check motor amps check duct design ...

Страница 32: ...ge Check voltage Sustained high discharge pressure Check running amperage and conditions described under Low suction pressure symptoms High suction and discharge pressures Check thermal expansion valve setting check for air in system Defective compressor overload If compressor is hot allow compressor to cool for two hours Recheck for open circuit Improper refrigerant charge Check subcooling Improp...

Страница 33: ... If superheat is high then valve is out of control and pegged wide open Check bulb for contact Adjust valve for superheat Replace valve powerhead or valve Thermostatic expansion valve pressure limit feature incorrect or inoperative Overfeeding Check bulb location and clamping Adjust superheat Replace expansion valve power head Room load too large Reduce the load or add more equipment Overcharged C...

Страница 34: ...echarge Low discharge pressure Insufficient refrigerant charge Check subcooling check for leak Repair leak and add refrigerant Defective or improperly adjusted expansion valve Check superheating and adjust thermal expansion valve Low suction pressure See Low suction pressure Faulty condenser temperature controls Check condenser controls and reset to obtain desired condensing temperature Compressor...

Страница 35: ...y filter or evaporator coil Check filter coil and airflow Dirty or clogged condenser coil Check coil and airflow Air or other non condensables in system Check equalized high side pressure with equivalent outdoor temperature Defective compressor See High suction pressure Restriction in suction and liquid line Check for restrictions in refrigerant circuit Control contacts stuck Check wiring Excessiv...

Страница 36: ... components can be heavy and serious injury may occur 3 Motors Check for cleanliness 4 Fan Belts Check for wear tension alignment 5 Blower Wheel Fasteners Check for cleanliness Check all fasteners for tightness Check for fatigue corrosion wear 6 Bearings Lubricate per the schedule in the Fan Bearings section 7 Door Seal Check if intact and pliable 8 Wiring Connections Check all connections for tig...

Страница 37: ...gned into the fan Fan Bearings Most bearings are permanently lubricated and require no further lubrication under normal use Normal use being considered 20ºF to 120ºF 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 zerk fittings to find out what type of bearing you have If your fan is not being ...

Страница 38: ... with caution by qualified personnel only Care must be taken not to damage the coils including the fins while cleaning Caution Fin edges are sharp 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 drai...

Страница 39: ...___________________________ _________________________________________________ _________________________________________________ Date____________________Time______________ AM PM Notes ____________________________________________ _________________________________________________ _________________________________________________ _________________________________________________ ______________________...

Страница 40: ...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 Phone 715 359 6171 Fax 715 355 2399 E mail gfcinfo greenheck com Web site www greenheck com Warranty AMCA Publication 410 96 Safety Practices for Users and Installers of Industrial ...

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Greenheck ERCH-HP, Инструкция по установке, эксплуатации и обслуживанию

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