Maritime Geothermal nordic dx-45 Installation Manual
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Maritime Geothermal nordic dx-45 Installation Manual

High efficiency direct expansion geothermal heat pumps
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Maritime
Geothermal Ltd.
NORDIC® models DX-45-55-65
High Efficiency Direct Expansion
Optimum Placement ...........................
Instaling DX linesets ..........................
Vacuuming & Charging ...................
Theory of Operation............................
Refrigerant Filled Copper Heat Exchanger Loop
Maritime Geothermal Ltd.
P.O. Box 413
Petitcodiac, N.B.
Geothermal Heat Pumps

Table of Contents

3
7
9
11
Component Layout ................
13
Performance Ratings ...............
15
CFM available .........................
E0A 2H0
Installation
Manual
Revision 1.4
Trouble Shooting Guide ..............
19
Electrical Schemetic .....................
20
Installer Wiring .............................
21
Plenum Heater Wiring ...................
22
Duct sizing Guide .......................
23
Warranty ...................................
Email:nordic@auracom.com
www.discribe.ca/nordic
12-Feb-00
24
27
28
29
30
31

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Summary of Contents for Maritime Geothermal nordic dx-45

  • Page 1: Table Of Contents

    Plenum Heater Wiring ....Built-in refrigerant safety ctrls.... Performance Ratings ....Duct sizing Guide ....... Theory of Operation......CFM available ......Warranty ........Refrigerant Filled Copper Heat Exchanger Loop Maritime Geothermal Ltd. Email:nordic@auracom.com P.O. Box 413 www.discribe.ca/nordic Petitcodiac, N.B. E0A 2H0...
  • Page 2 12-Feb-00 Maritime Geothermal Ltd. A NORDIC® Direct Expansion Heat Pump System Energy Input: Storage System: Earth’s Mass HEATING COOLING Extraction & Heat Distribu- NORDIC® DX-to-Water NORDIC® DX-to-Air Page ..2...

  • Page 3: Heat Pump System Requirements

    Req’d Layout Nordic® DX-45 models 1600 cfm Nordic® DX-55 models 1900 cfm Nordic DX-45 (3) x 350’ 8,000 ft² 4’x 175’ Nordic® DX-65 models 2100 cfm Nordic DX-55 (4) x 350’ 10,000 ft² 4’ x 175’ @ 80°F DB / 67°F WB and static pres of .2” H Nordic DX-65 (5) x 350’...
  • Page 4 12-Feb-00 Maritime Geothermal Ltd. NORDIC® “DX” Series Typical Plumbing & Ductwork NOTE: Nordic® DX (All Models) • Hot water lines are 1/2” ID copper. If (2) valves are installed on the hot water lines as • Insulate both hot lines and all refrigerant lines.
  • Page 5 Maritime Geothermal Ltd. 12-Feb-00 7. Difficulty in providing an easy to install system of earth Introduction to “DX” exchanger loops. The NORDIC® solution has been to start with a clean Technology new concept and to design a unit from the ground up. We started by developing an evaporator system that would yield Direct earth coupled heat pump or “DX”...
  • Page 6 12-Feb-00 Maritime Geothermal Ltd. NORDIC® Vertical Style DX - Typical Loop design NOTE: Layout for one borehole shown below. Actual installation re- quires one borehole per ton. (I. E. (3) holes for a DX-45, (4) NORDIC® DX-to- holes for a DX-55 and (5) for a...

  • Page 7: Optimum Placement

    Maritime Geothermal Ltd. 12-Feb-00 located at one end of the structure and the warm air is trans- “DX” systems can be installed in a more confined area mitted with uninsulated metal ductwork. than a conventional groundloop system, primarily because the...
  • Page 8 12-Feb-00 Maritime Geothermal Ltd. Piping Layout of Vertical Style DX Heat Pump System HOME 120 ft max 100 ft. typical Page ..8...

  • Page 9: Instaling Dx Linesets

    Maritime Geothermal Ltd. 12-Feb-00 nominal ton of capacity of the heat pump being installed. For example a 3-ton unit would have 3 groundloops and thus 6 ends to go through the concrete wall. We recommend that you Horizontal Trench Requirements...
  • Page 10 12-Feb-00 Maritime Geothermal Ltd. NORDIC® DX Horizontal Trench Design Page ..10...

  • Page 11: Vacuuming & Charging

    Maritime Geothermal Ltd. 12-Feb-00 Once the outside loops have been installed it is necessary Vacuum the system until the reading on an electronic vac- to interconnect the "gas" and liquid lines of each loop coming uum gauge stays below 500 microns for a period of 5 minutes into the building to its corresponding line on the heat pump.
  • Page 12 12-Feb-00 Maritime Geothermal Ltd. NORDIC® Horizontal DX Heat Pump System (Plan View) Page ..12...

  • Page 13: Built-In Refrigerant Safety Ctrls

    25° to 35° °F. Maritime Geothermal Ltd. recommends that the static pres- 6. At the electrical disconnect switch place the amprobe...
  • Page 14 Loops should be buried approxi- mately 6 ft. underground for best performance. Example: Nordic DX-45 should have (3) loops as shown at left, a DX-55 (4) loops and a DX-65 (5) loops. Other configurations would work as well such as a 50 ft. x 50 ft. pattern or a 60 ft.

  • Page 15: Theory Of Operation

    Maritime Geothermal Ltd. 12-Feb-00 • jaws around the supply wires and record the current in Prevents the heat pump from tripping out on a high pres- each. sure limit if all the heating TX valves decide to close at 7. Place the thermostat function selector in the COOL posi- the same time.
  • Page 16 12-Feb-00 Maritime Geothermal Ltd. by the controller board, allow refrigerant to flow into the earthloops to which they are attached. Valves which are de- energized remain closed at port “G” however flow is “OPEN” between ports “F” and “H” allowing refrigerant to be “scavenged”...
  • Page 17 Maritime Geothermal Ltd. 12-Feb-00 NORDIC® Series DX-45-55-65 Engineering and Performance Data June 1997 Page ..17...

  • Page 18: Vertical Case Dimensions

    12-Feb-00 Maritime Geothermal Ltd. Maritime Geothermal Ltd. Revision 1.35 Color: Caissie Grey Direct Expansion-to-Air Heat Pumps Models: DX-45-55-65 Style: Vertical Date: June 1997 Drawn By: G.Kaye Title: Cabinet & Piping Layout Supply & Return Duct Sizes • Basic cabinet design is the same for all DX models 45-55-65.

  • Page 19: Horizontal Dimensions

    Maritime Geothermal Ltd. 12-Feb-00 Maritime Geothermal Ltd. Revision 2.35 Color: Caissie Grey Direct Expansion-to-Air Heat Pumps Models: DX-45-55-65 Style: Horizontal Date: June 1997 Drawn By: G.Kaye Title: Cabinet & Piping Layout 2.50 4.22 1.25 18.00 26.07 DOOR Refrigerant Air Coil...

  • Page 20: Electrical Requirements

    12-Feb-00 Maritime Geothermal Ltd. Thermostat Disconnect Switch Electrical Supply and Thermostat Wire Sizes Model DX-45 DX-55 DX-65 Nominal BTU output 45,000 55,000 65,000 Min. circuit ampacity Minimum wire size # 8-3 # 6-3 # 6-3 Max. Fuse Size Max. breaker size...

  • Page 21: Component Layout

    Maritime Geothermal Ltd. 12-Feb-00 Maritime Geothermal Ltd. NORDIC® “DX” - Series Premium Features - Direct Expansion-to-Air Units • Return Air Filter sion valve. • • Oversize high effi- Domestic Hot Water ciency air coil. (IN) • • Belt drive blower with Domestic Hot Water ball bearings.

  • Page 22: Performance Ratings

    12-Feb-00 Maritime Geothermal Ltd. Capacity Data Model DX-45-HAC (nominal 3.5 ton) Heating Ground Heat of Diff Btu's Comp Comp Blower Blower Total Suct Disc Temp. Absorbtion Amps Watts Amps Watts Watts Pres 45163 70.2 109.0 38.8 59556 19.4 3640 4045 40104 70.5...

  • Page 23: Cfm Available

    Maritime Geothermal Ltd. 12-Feb-00 Capacity Data Model DX-65-HAC (nominal 5 ton) Heating Ground Heat of Diff Btu's Comp Comp Blower Blower Total Suct Disc Temp. Absorbtion Amps Watts Amps Watts Watts Pres 62860 114.7 44.9 84730 31.8 6551 6965 3.56 80.4...

  • Page 24: Trouble Shooting Guide

    12-Feb-00 Maritime Geothermal Ltd. NORDIC® DX Heat Pump Trouble Shooting Guide Fault Possible Cause Verification Recommended Action Compressor not Power Failure Electric circuit test shows no Check for blown fuse at heat voltage on the line side of pump’s disconnect box or operating compressor contactor.
  • Page 25 Maritime Geothermal Ltd. 12-Feb-00 Fault Possible Cause Verification Recommended Action • Thermostat not calling for Compressor not Open control circuit. Locate open control and deter- operating mine cause. Replace faulty heat. • High or low pressure limit control if necessary.
  • Page 26 12-Feb-00 Maritime Geothermal Ltd. Fault Possible Cause Verification Recommended Action Low or “no” air Open control circuit Thermostat not set to signal Turn room thermostat down. conditioning operation Reduced air flow or re- Check for: turn air temperature too 1. Dirty air filter.

  • Page 27: Electrical Schemetic

    Maritime Geothermal Ltd. 12-Feb-00 NORDIC® “DX” Series - Schematic Wiring Diagram Package Unit Schemetic Shown Page ..27...

  • Page 28: Installer Wiring

    12-Feb-00 Maritime Geothermal Ltd. NORDIC® “DX” Series Electrical Box Connections Low Voltage (24v)Wiring Use an (18-8) thermostat cable. Connect C,G, Y/Y , R, L, W/W , O/ B in terminal box to the corre- sponding letters on the thermostat sup- plied.

  • Page 29: Plenum Heater Wiring

    Maritime Geothermal Ltd. 12-Feb-00 NORDIC® Thermolec® Plenum Heater Connections Electrical Connection to a NORDIC® Heat Pump 1. Connect the proper electrical supply with a suitable breaker to the main ter- minal block shown. (“A”at left) 2. Using 2 conductors in a length of 18-4 thermostat wire, Connect “I”...

  • Page 30: Duct Sizing Guide

    12-Feb-00 Maritime Geothermal Ltd. Duct Sizing Guide Required Diameter Rectangular Equivalents Return Air Required in inches Diameter 2.25 x 10 3 x 8 3.5 x 6 4 x 5.5 5 x 5 2.25 x 10 3 x 8 3.5 x 6 4 x 5.5...

  • Page 31: Warranty

    7. L – Lock-out indicator light. 1. R - has 24v hot signal continuously. To accomplish this Maritime Geothermal Ltd. has de- 1. C – common signed an electronic control board to monitor and control all aspects of the DX heat pump operation.
  • Page 32 12-Feb-00 Maritime Geothermal Ltd. NORDIC® DX Solid State Control Board Selects the No. of loops that Diagram A Thermostat Connection Block The board controls (2 – 5) Short Pins to Reset Restore Jumper if no “B” Defaults terminal Loop Switch...
  • Page 33 Maritime Geothermal Ltd. 12-Feb-00 The NCB has another terminal block on the middle left 3. Cooling Loop # 3 side which accepts inputs from the high & low refrigerant 4. Cooling Loop # 4 pressure controls as well as the loop maximum pressure 5.
  • Page 34 12-Feb-00 Maritime Geothermal Ltd. gin to cool using only 1 of the possible loops available. High / Low Pressure control operation (MODE 1) The controller board keeps track of the actual run- time hours and stores this information in non-volatile mem- If a high or low pressure situation occurs within the sys- ory.
  • Page 35 Maritime Geothermal Ltd. 12-Feb-00 Page ..35...
  • Page 36 2. The installer must complete the “Installation Data Sheet”, have it en- dorsed by the owner and return it to Maritime Geothermal Ltd. within 21 days after the installation of the unit. 3. It is the responsibility of the building or general contractor to supply temporary heat to the structure prior to occupancy.

This manual is also suitable for:

Nordic dx-55Nordic dx-65

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