Enertech VC Series Engineering Data And Installation Manual
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Enertech VC Series Engineering Data And Installation Manual

Vertical packaged water-to-air heat pumps
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  • Page 2: Table Of Contents

    I. CONTENTS Key & Legend ................................... 4 Key to Model Numbers ............................... 4 Legend for Tables ................................4 III. Warnings & Cautions ............................... 5 IV. General Information ................................ 5 Inspection .................................... 5 Storage ....................................6 Protection .................................... 6 Pre-Installation Preparation ..............................6 V.
  • Page 3 3 TON Part load Heating Performance Data ........................20 4 TON FULL LOAD Heating & Cooling Performance Data ....................21 4 TON PART load Heating Performance Data ........................ 22 5 TON FULL load Heating & Cooling Performance Data ....................23 5 TON PART load Heating Performance Data ........................

  • Page 5: Key & Legend

    II. KEY & LEGEND KEY TO MODEL NUMBERS LEGEND FOR TABLES BTU/hr Heating or cooling capacity Gallons Per Minute Capacity Heat Extracted Coefficient of performance (BTU/hr out : BTU/hr in) Heat Rejected Cubic feet per minute Hydronic Dry-bulb entering air temperature Kilowatt DEWT Demand Entering Water Temperature...

  • Page 6: Warnings & Cautions

     Note – These units feature braze-plate heat PROPERLY GROUNDED! exchangers. Enertech requires that a strainer be The main electrical service must be protected by a fuse or circuit breaker and be capable of installed on the water inlet of the source circuit. A...

  • Page 7: Storage

    damage and ensure that the carrier makes pump in a cold environment may flush lubricant notation of any damage or missing packages on from the compressor resulting in compressor bill of lading records. Pictures of any damage are damage and ultimately, unit failure. recommended.

  • Page 8: Ground Sources And Design Water Temperatures

    15 F freeze protection. See Figure 3 ° Enertech’s proprietary Geothermal Transfer  Note – If a heat pump is installed with ground Fluid (GTF) is methanol-based antifreeze and water, it should have a Cupro-Nickel (CuNi) should be mixed 50% with water to achieve freeze water coil.

  • Page 9: Ground Water Installation

     Note – These units feature braze-plate heat calculated proper amount of antifreeze to give a exchangers. Enertech requires that a strainer be 12°F to 15°F freeze protection. Always pump installed on the water inlet of the source circuit. A away from coil or into the earth loop.

  • Page 10: Application Diagrams

    but they do show important principles that can be  Important – It is highly recommended that applied to any system. Pressure/Temperature (P/T) ports be placed in the supply and discharge lines so that thermometers UNIT LOCATION/MOUNTING or pressure gauges can be inserted into the water stream.

  • Page 11: Electrical

    functions of geothermal heat pumps with space  CAUTION – Always use plastic male fittings heating, space cooling, desuperheater into plastic female or into metal female fittings. dedicated domestic water heating. This controller Never use metal male fittings into plastic female switches control devices by reviewing the various fittings.
  • Page 12 Main Board Fan Operation Dipswitch The fan has an extended run time of 2 minutes. If Designator Description Dipswitch On the thermostat/fan has an internal fan extended Freeze Protection 17°F 35°F run time, the fan could potentially run for longer Single or Two Two Stage Single Stage...

  • Page 13: Led Lights

    Staging Control mode is waiting to run for the anti-short cycle period the LED will be flashing. In the space heating mode, as fluid temperature declines in the winter, more flow (gpm) is Heating - Space Heating or Electric Heat required to provide more heat transfer from the Operation ground to the heat pump.

  • Page 14: Heat Pump Commissioning

    “t” in Enertech. is shut down and soft lockout is triggered. The unit will be shut down for 15 minutes. At which VII.

  • Page 15: Maintenance

    (compressor, etc.). data will be stored in the controller. 1. Reset Power. The Enertech controller (and a room thermostat, if 2. Hold the TEST button for 15 seconds. part of the system installation) will display a PWR & Cooling LED will begin flashing.

  • Page 16: Desuperheater

    wires required or other questions, please refer to 140°F. tank temperatures become the installation manual that was sent with the uncomfortably hot, move this switch to the thermostat. leaving water line, which will reduce the tank maximum temperatures 10°F to 15°F. DESUPERHEATER CAUTION–...
  • Page 17 Desuperheater must be plumbed in copper tubing. The built-in desuperheater pump can provide the proper flow to the desuperheater if the total equivalent length of straight pipe and connections is kept to a maximum of 90 feet of 1/2-inch type L copper tubing (or a combination of approximately 60 feet with typical elbows and fittings).

  • Page 18: Engineering Specifications

    IX. ENGINEERING SPECIFICATIONS PERFORMANCE RATINGS 3 TON PERFORMANCE RATINGS Heating Performance Data (Tested in accordance with ASHRAE/AHRI/ ISO Standard 13256-1) Operating Source Entering GPM Total Heat Application Mode EWT (°F) (source) Output (MBH) Ground Water 50°F 45,400 1100 Full Load Ground Loop 32°F * 37,200...

  • Page 19: Ton Performance Data

    5 TON PERFORMANCE DATA Heating Performance Data (Tested in accordance with ASHRAE/AHRI/ ISO Standard 13256-1) Operating Source Entering GPM Total Heat Application Mode EWT (°F) (source) Output (MBH) Ground Water 50°F 60,300 1700 Full Load Ground Loop 32°F * 52,500 1700 Ground Water 50°F...

  • Page 20: Performance Data

    PERFORMANCE DATA 3 TON FULL LOAD HEATING & COOLING PERFORMANCE DATA Cooling Heating Ground EAT 80.6°F DB & 66.2°F WB EAT 68°F DB Airflow Total Sensible Suction Discharge Airflow Total Sensible Suction Discharge dP ft °F psig Capacity Capacity Pressure Pressure Capacity Capacity...

  • Page 21: Ton Part Load Heating Performance Data

    3 TON PART LOAD HEATING PERFORMANCE DATA Heating Ground EAT 68°F DB Airflow Total Sensible Suction Discharge dP ft °F psig Capacity Capacity Pressure Pressure 20.6 15.9 21.7 16.7 12.2 22.9 17.6 24.6 18.9 25.9 19.9 12.2 27.3 21.0 28.8 22.2 30.4 23.4...

  • Page 22: Ton Full Load Heating & Cooling Performance Data

    4 TON FULL LOAD HEATING & COOLING PERFORMANCE DATA Cooling Heating Ground EAT 80.6°F DB & 66.2°F WB EAT 68°F DB Airflow Total Sensible Suction Discharge Airflow Total Sensible Suction Discharge dP ft °F psig Capacity Capacity Pressure Pressure Capacity Capacity Pressure Pressure...

  • Page 23: Ton Part Load Heating Performance Data

    4 TON PART LOAD HEATING PERFORMANCE DATA Heating Ground EAT 68°F DB Airflow Total Sensible Suction Discharge dP ft °F psig Capacity Capacity Pressure Pressure 1100 27.2 20.0 1100 27.5 20.2 12.2 1100 27.8 20.4 1100 32.3 23.7 1100 32.6 23.9 12.2 1100...

  • Page 24: Ton Full Load Heating & Cooling Performance Data

    5 TON FULL LOAD HEATING & COOLING PERFORMANCE DATA Cooling Heating Ground EAT 80.6°F DB & 66.2°F WB EAT 68°F DB Airflow Total Sensible Suction Discharge Airflow Total Sensible Suction Discharge dP ft °F psig Capacity Capacity Pressure Pressure Capacity Capacity Pressure Pressure...

  • Page 25: Ton Part Load Heating Performance Data

    5 TON PART LOAD HEATING PERFORMANCE DATA Heating Ground EAT 68°F DB Airflow Total Sensible Suction Discharge dP ft °F psig Capacity Capacity Pressure Pressure 1400 39.0 29.2 1400 39.6 29.7 12.2 1400 40.1 30.0 1400 42.6 31.9 1400 43.3 32.4 12.2 1400...

  • Page 26: Physical Data

    PHYSICAL DATA 3 TON 4 TON 5 TON Nominal Rated CFM 1100 1400 1700 Air Coil Face Area (ft2) Tube O.D. 7/8 OD 7/8 OD 7/8 OD Fins per Inch 14 FPI 14 FPI 14 FPI Coil Rows Filter Height and Width 1" Thick 21 5/8”...

  • Page 27: Electrical Data

    ELECTRICAL DATA Total 60 Hz Power Compressor Voltage Model Pump Pump Unit Circuit Fuse Code Motor FLA* AMPS HACR Volts Phase 208/230 21.2 32.0 37.3 3 TON 208/230 21.2 28.0 33.3 208/230 152.9 27.1 39.7 46.5 4 TON 208/230 152.9 27.1 34.2 41.0...

  • Page 28: Water Coil Pressure Drop Ratings

    WATER COIL PRESSURE DROP RATINGS Pressure drops (PSI) with pure water. 3 TON GPM Water Flow Source Water Pressure Drop(BPHE) Source Water Pressure Drop(CuNi) 4 TON GPM Water Flow Source Water Pressure Drop(BPHE) Source Water Pressure Drop(CuNi) 5 TON GPM Water Flow Source Water Pressure Drop(BPHE) Source Water Pressure Drop(CuNi)

  • Page 29: Figure

    FIGURE 1 – GROUND LOOP WATER PLUMBING Note – These units feature braze-plate heat exchangers. Enertech requires that a strainer be installed on the water inlet of the source circuit. A strainer with a size of 16-20 mesh minimum should be used. For your convenience a strainer and connection hardware have been included with the unit.
  • Page 30 FIGURE 3 –DESUPERHEATER INSTALLATION FIGURE 4 – ALTERNATE DESUPERHEATER INSTALLATION...

  • Page 31: Troubleshooting

    XI. TROUBLESHOOTING If the heat pump goes into lockout on a high or low pressure switch or discharge refrigerant temperature, the cause of the lockout can be narrowed down by knowing the operating mode and which switch the unit locked out on. The following table will help track down the problem once this information is known. ...
  • Page 32 Low ambient temperature at the heat pump. Undercharged/overcharged refrigerant circuit. Cooling Mode Expansion valve/sensing bulb malfunction. Excessively low fluid temperature in the ground side heat exchanger. HIGH PRESSURE INDICATOR Check if High Pressure switch is open. Thermostat Heating Check electrical connections between Mode High Pressure switch and Controller.
  • Page 33 CHECKS AND CORRECTIONS PROBLEM POSSIBLE CAUSE Tripped Breaker Reset circuit breaker (check for correct size). Broken or Loose Wires Replace or tighten the wires. Voltage Supply Low If voltage is below minimum voltage on data plate, contact power company. Low Voltage Circuit Check 24-volt transformer for burnout, blown fuse or voltage less than 18 V.
  • Page 34 CHECKS AND CORRECTIONS PROBLEM POSSIBLE CAUSE Check continuity of the compressor windings with an ohmmeter. If the windings are Compressor Windings Open open, replace the compressor. Try an auxiliary capacitor in parallel with the run capacitor momentarily. If the Seized Compressor compressor still does not start, replace it.
  • Page 35 CHECKS AND CORRECTIONS PROBLEM POSSIBLE CAUSE Excessive water through water-cooled heat exchanger will cause squealing sound. Water and Airborne Noises Ensure adequate flow for good operation but eliminating the noise. Purge air from ground loop. Cavitating Pumps Squealing Sound from Inside Purge air from the water side of the desuperheater heat exchanger or defective the Cabinet desuperheater heat exchanger.
  • Page 36 ECM Motor CHECKS AND CORRECTIONS PROBLEM Motor rocks slightly when starting This is normal start-up for ECM Wait for completion of ramp-up at start Check power at motor Check low voltage (24 VAC R to X) at motor Motor won’t start Check low voltage connections (G, Y, W2, R, X) at motor •No movement Check for unseated pins in connectors on motor harness...

  • Page 37: Wiring Diagram

    XII. WIRING DIAGRAM STANDARD MODELS WITH OPTIONAL DESUPERHEATER CONTROL BOARD DIP SWITCHES Acronym Description Blower Motor (ECM) Freeze protection Hot Water 33ºF 15 ºF 1-Stage or 2-Stage 1-Stage 2-Stage Optional Slide Desuperheater Enable Disable In Heater Pumps operate separately or together Enable ** Disable W2 E...

  • Page 38: Warranty Claim And Registration Forms

    XIII. WARRANTY CLAIM AND REGISTRATION FORMS...

  • Page 40: Equipment Start Up Form And Process

    XIV. EQUIPMENT START UP FORM AND PROCESS...
  • Page 43 Greenville, IL & Mitchell, SD info@enertechgeo.com www.gogogeo.com 20D152-01NN | Rev.: January 2014 | ©2012 Enertech Global, LLC. | All Rights Reserved...

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