Boreal ACDX-45 Installation Manual

Direct expansion geothermal heat pumps

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ACDX 45-55-65

High Efficiency Direct Expansion

Geothermal Heat Pumps

Boreal GEOTHERMAL Inc.

Tel : 514 – 886 – 0682

Fax : 514 – 221 – 3448

2005 Boreal Geothermal Inc.

Energy Efficient Solutions

Email : info@boreal-geothermal.com

Web :

www.boreal-geothermal.com

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Page 1 2005 Boreal Geothermal Inc. www.boreal-geothermal.com Installation Manual ACDX 45-55-65 High Efficiency Direct Expansion Geothermal Heat Pumps Energy Efficient Solutions Boreal GEOTHERMAL Inc. Tel : 514 – 886 – 0682 Email : info@boreal-geothermal.com Fax : 514 – 221 – 3448 Web :...
Page 2 2005 Boreal Geothermal Inc. www.boreal-geothermal.com CAUTION! CAUTION! To avoid equipment damage, DO NOT use these units as a source of heating or cooling during the con- struction process. The mechanical components and filters will quickly become clogged with construction dirt and de- bris, which may cause system damage.
Page 3: Table Of Contents
2005 Boreal Geothermal Inc. www.boreal-geothermal.com Table of Contents Section Page • Heat Pump System Requirements • Optimum Placement • Installing ACDX line sets • Vacuuming & Charging • Built-in refrigerant safety controls • Theory of Operation • Vertical Case Dimensions •...
Page 4 Note: These are minimum loop field requirements based on an earth temperature of 45° F. Boreal® ACDX-45 could have up to 16 hot air grills. Boreal® ACDX-55 could have up to 19 hot air grills. moisture present in the loop field area during the Boreal®...
Page 5 2005 Boreal Geothermal Inc. www.boreal-geothermal.com BOREAL® “ACDX” Series — Plumbing and Ductwork NOTE: Boreal® ACDX (All Models) ♦ Hot water lines are 1/2” ID copper. If (2) valves are installed on the hot water lines as shown in this diagram then a pressure relief valve (set at 75 - 100 ♦...
Page 6 2005 Boreal Geothermal Inc. www.boreal-geothermal.com Introduction to “ACDX” Technology The BOREAL® solution has been to start with a clean 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 “ACDX”...
Page 7 BOREAL® Vertical Style ACDX — Typical Loop design Attention! Layout for one borehole shown below. Actual installation requires one borehole per ton. (I.E. (3) holes for a ACDX-45, Boreal ® ACDX-to-Air (4) holes for a ACDX-55 and (5) for a ACDX-65...
Page 8: Optimum Placement
BOREAL® ACDX Heat Pump Materials supplied by BOREAL® Installation Instructions BOREAL® supplies the ACDX heat pump with all inter- nal valving and headering preassembled, pressure tested and ready to be installed to the customers duct system and under- Unpacking ground copper exchanger loops.
Page 9 2005 Boreal Geothermal Inc. www.boreal-geothermal.com Piping Layout of a BOREAL® Vertical ACDX Heat Pump System...
Page 10 2005 Boreal Geothermal Inc. www.boreal-geothermal.com insulation. There will be two 1/2" OD copper tubes for each Horizontal Trench Requirements 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.
Page 11 2005 Boreal Geothermal Inc. www.boreal-geothermal.com BOREAL® ACDX Horizontal Trench Design...
Page 12 (or alternately the tubing can be "swaged") and the joints sil- ver soldered with 5% silfos. BOREAL® absolutely requires Condensate Drain that dry nitrogen be bled through the system during all silver...
Page 13 2005 Boreal Geothermal Inc. www.boreal-geothermal.com BOREAL® Horizontal ACDX Heat Pump System (Plan View)
Page 14 .2 inches of water total. Return ducts should ide- ally be placed in every room and be sized 50% larger than The BOREAL® heat pump has two built in safety con- corresponding supplies. In some instances the number of floor...
Page 15 ⇒ Loops should be buried approxi- mately 6 ft. underground for best performance. Example: Boreal ACDX-45 should have (3) loops as shown at left, a ACDX-55 (4) loops and a ACDX-65 (5) loops. Other configurations would work as well such as a 50 ft. x 50 ft. pattern or a 60 ft.
Page 16: Theory Of Operation
Further sub-cooling of the refrigerant liquid BOREAL® unit has it’s heat exchanger embedded in the takes place as the refrigerant reaches the bottom of the coil ground.
Page 17 2005 Boreal Geothermal Inc. www.boreal-geothermal.com remain closed at port “G” however flow is “OPEN” between ports “F” and “H” allowing refrigerant to be “scavenged” from the ground loops not in use. Within a few minutes all the liquid refrigerant in the idle cooling loops is rerouted to the one, or more cooling loops that are in use at the time.
Page 18 2005 Boreal Geothermal Inc. www.boreal-geothermal.com BOREAL® Series ACDX-45-55-65 Engineering and Performance Data...
Page 19 2005 Boreal Geothermal Inc. www.boreal-geothermal.com Direct Expansion-to-Air Heat Pumps Cabinet & Piping Layout (vertical) Supply & Return Duct Sizes • Basic cabinet design is the same for all ACDX mod- els 45-55-65. • Cold air return measures 27” x 30.5”...
Page 20 2005 Boreal Geothermal Inc. www.boreal-geothermal.com Direct Expansion-to-Air Heat Pumps Cabinet & Piping Layout (horizontal) 2.50 4.22 1.25 18.00 26.07 DOOR Refrigerant Air Coil Filter rack area Electric BACK SIDE (Return Air Side) 52.00 22.00 28.00 1.00 BLOWER DOOR FRONT DOOR SIZE 28"W x 31"H...
Page 21 2005 Boreal Geothermal Inc. www.boreal-geothermal.com Electrical Supply and Thermostat Wire Sizes Model ACDX-45 ACDX-55 ACDX-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 Thermostat wire size...
Page 22 2005 Boreal Geothermal Inc. www.boreal-geothermal.com BOREAL® “ACDX” - Series Premium Features - Direct Expansion-to-Air Units ⇒ Return Air Filter ⇒ Domestic Hot Water (IN) ⇒ Oversize high efficiency air coil. ⇒ Domestic Hot Water ⇒ Belt drive blower with ball (OUT) ⇒...
Page 23 2005 Boreal Geothermal Inc. www.boreal-geothermal.com Capacity Data * Model ACDX-45-HAC (nominal 3.5 ton) Heating Ground Heat of Diff Btu's Comp Comp Blower Blower Total Suct Disc Temp. Absorption Amps Watts Amps Watts Watts Pres 45163 70.2 109.0 38.8 59556 19.4...
Page 24: Cfm Available
2005 Boreal Geothermal Inc. www.boreal-geothermal.com Capacity Data Model ACDX-65-HAC (nominal 5 ton) Heating Ground Heat of Diff Btu's Comp Comp Blower Blower Total Suct Disc 62860 114.7 44.9 84730 31.8 6551 6965 3.56 80.4 274.0 60207 113.5 43.5 82080 30.5...
Page 25: Trouble Shooting Guide
2005 Boreal Geothermal Inc. www.boreal-geothermal.com BOREAL® ACDX Heat Pump Trouble Shooting Guide Fault Possible Cause Verification Recommended Action Compressor not Power Failure Electric circuit test shows no voltage Check for blown fuse at heat pump’s operating on the line side of compressor con- disconnect box or blown fuse tactor.
Page 26 2005 Boreal Geothermal Inc. www.boreal-geothermal.com Fault Possible Cause Verification Recommended Action • Compressor not Open control circuit. Locate open control and determine Thermostat not calling for heat. operating cause. Replace faulty control if nec- • High or low pressure limit open.
Page 27 2005 Boreal Geothermal Inc. www.boreal-geothermal.com Fault Possible Cause Verification Recommended Action Low or “no” air Open control circuit Thermostat not set to signal opera- Turn room thermostat down. conditioning tion Reduced air flow or return Check for: air temperature too cold.
Page 28 2005 Boreal Geothermal Inc. www.boreal-geothermal.com BOREAL® “ACDX” Series - Schematic Wiring Diagram Package Unit Schematic Shown...
Page 29: Plenum Heater Wiring
2005 Boreal Geothermal Inc. www.boreal-geothermal.com BOREAL® “ACDX” Series Electrical Box Connections Low Voltage (24v) Wiring Use an (18-8) thermostat cable. Connect C,G, Y/Y , R, L, W/W , O/W B in terminal box to the corresponding letters on the thermostat supplied.
Page 30: Heat Pump
“F” in the heat pump’s electrical box to “F” and “F” in the plenum heater. Thermostat Operation The BOREAL® heat pump comes supplied with a 2-stage heating / 1-stage cooling auto change-over digital thermostat. The heat pump is already prewired for this stat and requires only the connections mentioned above for full operation.
Page 31: Duct Sizing Guide
2005 Boreal Geothermal Inc. www.boreal-geothermal.com Duct Sizing Guide Required Diameter Return Air Required Rectangular Equivalents 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 32: Electronic Control Board
The Boreal ACDX heat pump operates on the principle The BCB has all the time delay functions of a conven- of a buried multi loop condenser / evaporator assembly to...
Page 33 2005 Boreal Geothermal Inc. www.boreal-geothermal.com BOREAL® ACDX Solid State Control Board Diagram A Thermostat Connection Block Selects the No. of loops that The board controls (2 – 5) Restore Jumper if no “B” Defaults Short Pins to Reset terminal Loop Switch...
Page 34 2005 Boreal Geothermal Inc. www.boreal-geothermal.com The BCB has another terminal block on the middle left 2. Cooling Loop # 2 side which accepts inputs from the high & low refrigerant 3. Cooling Loop # 3 pressure controls as well as the loop maximum pressure 4.
Page 35 2005 Boreal Geothermal Inc. www.boreal-geothermal.com A short cycle timer will keep compressor OFF for 2 minute solenoid and # 1 ground loop will activate followed by the (adjustable) blower. High / Low Pressure control operation If the system has been in the HEAT mode there will be a delay as the MODE switch timer keeps the compressor OFF for 5 minutes (adjustable).
Page 36 2005 Boreal Geothermal Inc. www.boreal-geothermal.com...
Page 37: Limited Warranty
This warranty is subject to the following conditions: 1. The BOREAL® heat pump must be properly installed and maintained in accordance with Boreal Geothermal Inc.'s installation and maintenance instruct ions.

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Boreal ACDX-45 Installation Manual

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