GT-PX Indoor Split Series (50YDS Models) GT-PE Outdoor Split Series (50YPS Models) Installation, Operation and Maintenance Instructions Residential Split Geothermal Heat Pumps 97B0048N02 Revised: 6 Dec.
This page was intentionally left blank.
Residential Split Units - 60Hz Puron® R e v. : 6 D e c .
Residential Split Units - 60Hz Puron® R e v. : 6 D e c . , 2 0 1 1 Safety Safety Warnings, cautions and notices appear throughout this manual. Read these items carefully before attempting any installation, service, or troubleshooting of the equipment. DANGER: Indicates an immediate hazardous situation, which if not avoided will result in death or serious injury. DANGER labels on unit access panels must be observed.
Residential Split Units - 60Hz Puron® R e v. : 6 D e c . , 2 0 1 1 General Information Storage Pre-Installation Inspection Upon receipt of the equipment, carefully check the shipment against the bill of lading. Make sure all units have been received. Inspect the packaging of each unit, and inspect each unit for damage. Insure that the carrier makes proper notation of any shortages or damage on all copies of the freight bill and completes a common carrier inspection report.
Residential Split Units - 60Hz Puron® R e v. : 6 D e c . , 2 0 1 1 Equipment Selection Air Coil Match-ups The installation of geothermal heat pump units and all associated components, parts, and accessories which make up the installation shall be in accordance with the regulations of ALL authorities having jurisdiction and MUST conform to all applicable codes. It is the responsibility of the installing contractor to determine and comply with ALL applicable codes and regulations.
Residential Split Units - 60Hz Puron® R e v. : 6 D e c . , 2 0 1 1 Equipment Selection Air Coil Match-ups Table 1b: GT-PX & GT-PE Air Handler Characteristics for Brands other than Above Models Nominal Tons* Evaporator Temp (ºF) CFM Capacity (MBtuh)** 026 - Part Load 1.5 50 530 19.2 - 22.4 026 - Full Load 2.0 52 880 24.2 - 28.2 038 - Part Load 2.5 51 700 25.2 - 29.2 038 - Full Load 3.0 50 1200 34.5 - 40.1 049 - Part Load 3.5 47 1000 34.3 - 39.9 049 - Full Load 4.
Residential Split Units - 60Hz Puron® R e v. : 6 D e c . , 2 0 1 1 Equipment Selection Air Handler Selection Air Handler Selection Example Figure 1 shows a typical performance table for a heat pump air handler. Suppose the evaporator temperature required is 50ºF, the capacity required is 35,000 Btuh and the airÅow required is 1,200 CFM. Each evaporator temperature listed in the table shows three wet bulb temperatures. As recommended in the table notes above, select the 67ºF WB column.
Residential Split Units - 60Hz Puron® R e v. : 6 D e c . , 2 0 1 1 Installation The installation of water source heat pump units and all associated components, parts and accessories which make up the installation shall be in accordance with the regulations of ALL authorities having jurisdiction and MUST conform to all applicable codes. It is the responsibility of the installing contractor to determine and comply with ALL applicable codes and regulations.
Residential Split Units - 60Hz Puron® R e v. : 6 D e c . , 2 0 1 1 Installation Figure 2: GT-PX Installation Figure 3: GT-PE Installation ([LVWLQJ 3DG ODUJHU WKDQ [ > [ FP@ %RWWRP 9LHZ RI 8QLW µ [ µ [ FP µ > FP@ $LU 3DG :LWK $FFHVV +ROH µ > FP@ µ > FP@ External Flow Controller Mounting The Flow Controller can be mounted beside the indoor unit as shown in Figure 7. Review the Flow Controller installation manual for more details.
Residential Split Units - 60Hz Puron® R e v. : 6 D e c . , 2 0 1 1 Installation Internal Flow Controller Connections (50YPS Series) The 50YPS series outdoor compressor section includes a factory built-in circulator, as shown in Ägure 3. Figure 5: Hose Connections (GT-PE Series) The circulator in the 50YPS unit is three speed (shipped on high speed). Lower circulator speeds may be chosen where appropriate to lower pumping power and match the Åow rate to the unit’s requirements.
Residential Split Units - 60Hz Puron® R e v. : 6 D e c . , 2 0 1 1 Installation Figure 6: Pump Curves for GT-PE internal pump(s) - Double Pump 70 60 Head (ft) 50 40 Speed 3 30 Speed 2 20 Speed 1 10 0 0 5 10 15 20 25 30 GPM Ground-Loop Heat Pump Applications ѥ CAUTION! ѥ CAUTION! The following instructions represent industry accepted installation practices for closed loop earth coupled heat pump systems.
Residential Split Units - 60Hz Puron® R e v. : 6 D e c . , 2 0 1 1 Ground-Loop Heat Pump Applications Earth loop temperatures can range between 25 and 110°F [-4 to 43°C]. Flow rates between 2.25 and 3 gpm per ton [2.41 to 3.23 l/m per kW] of cooling capacity is recommended in these applications. Test individual horizontal loop circuits before backÄlling. Test vertical U-bends and pond loop assemblies prior to installation. Pressures of at least 100 psi [689 kPa] should be used when testing.
Residential Split Units - 60Hz Puron® R e v. : 6 D e c . , 2 0 1 1 Ground-Loop Heat Pump Applications Table 2: Approximate Fluid Volume (U.S. gal. [L]) per 100' of Pipe Figure 7: Loop Connection (Indoor Compressor Section) Fluid Volume (gal [liters] per 100’ [30 meters) Pipe) Pipe Copper Rubber Hose Polyethylene Size Volume (gal) [liters] 1” 4.1 [15.3] 1.25” 6.4 [23.8] 2.5” 9.2 [34.3] 1” 3.9 [14.6] 3/4” IPS SDR11 2.8 [10.4] 1” iPS SDR11 4.5 [16.7] 1.25” IPS SDR11 8.0 [29.8] 1.
Residential Split Units - 60Hz Puron® R e v. : 6 D e c . , 2 0 1 1 Ground-Water Heat Pump Applications “Indoor” Compressor Section Only Open Loop - Ground Water Systems Typical open loop piping is shown in Figure 8. Shut off valves should be included for ease of servicing. Boiler drains or other valves should be “tee’d” into the lines to allow acid Åushing of the heat exchanger.
Residential Split Units - 60Hz Puron® R e v. : 6 D e c . , 2 0 1 1 Ground-Water Heat Pump Applications Water Coil Low Temperature Limit Setting For all open loop systems the 30°F [-1.1°C] FP1 setting (factory setting-water) should be used to avoid freeze damage to the unit. See “Low Water Temperature Cutout Selection” in this manual for details on the low limit setting.
Residential Split Units - 60Hz Puron® R e v. : 6 D e c . , 2 0 1 1 Water Quality Standards Table 4: Water Quality Standards Water Quality Parameter HX Material Closed Recirculating Open Loop and Recirculating Well Scaling Potential - Primary Measurement Above the given limits, scaling is likely to occur. Scaling indexes should be calculated using the limits below pH/Calcium Hardness Method All - pH < 7.
Residential Split Units - 60Hz Puron® R e v. : 6 D e c . , 2 0 1 1 Refrigeration Installation ѥ CAUTION! ѥ CAUTION! Puron® systems operate at higher pressures than R-22 systems. Be certain that service equipment (gauges, tools, etc.) is rated accordingly. Some R-22 service equipment may not be acceptable. ѥ CAUTION! ѥ CAUTION! Installation of a factory supplied liquid line bi-directional Älter drier is required. Never install a suction line Älter in the liquid line.
Residential Split Units - 60Hz Puron® R e v. : 6 D e c .
Residential Split Units - 60Hz Puron® R e v. : 6 D e c . , 2 0 1 1 Refrigeration Installation • 3/4” diameter suction lines: 1/4 lb. per foot of line set + 1 lb. per ton for indoor coil. • 7/8” diameter suction lines: 1/3 lb. per foot of line set + 1 lb. per ton for indoor coil • 1-1/8” diameter suction lines: 1/2 lb. per foot of line set + 1 lb. per ton for indoor coil. Example: 3-ton system with 40 ft. long line set and 3/4” suction line. Line set: 1/4 lb./ft. x 40 ft. = 10 lb. Indoor coil: 1 lb.
Residential Split Units - 60Hz Puron® R e v. : 6 D e c . , 2 0 1 1 Refrigeration Installation 7. 8. 9. 10. 11. 12. 13. 14. the existing refrigerant Åow control oriÄce or thermal expansion valve prior to Åushing is highly recommended to assure proper Åushing. Use a Äeld-provided Ätting or piece of copper tubing to reconnect the lines where the thermal expansion valve was removed. Remove the pressure tap valve cores from the outdoor unit’s service valves.
Residential Split Units - 60Hz Puron® R e v. : 6 D e c . , 2 0 1 1 Refrigeration Installation FP2 Sensor Installation An FP2 sensor with violet wiring is shipped loose with the compressor section. This is the air coil low temperature protection sensor. Install this sensor on the refrigerant line between the indoor expansion valve and the air coil using thermal compound and the supplied mounting clips. Ensure that the sensor makes good thermal contact with the refrigerant line and insulate the sensor.
Residential Split Units - 60Hz Puron® R e v. : 6 D e c . , 2 0 1 1 Refrigeration Installation Determining Superheat: 1. Measure the temperature of the suction line at a point near the expansion valve bulb. 2. Determine the suction pressure by attaching refrigeration gauges to the suction schrader connection at the compressor. 3. Convert the pressure obtained in step 2 to saturation temperature (boiling point) by using the pressure/ temperature conversion table on the gauge set. 4.
Residential Split Units - 60Hz Puron® R e v. : 6 D e c .
Residential Split Units - 60Hz Puron® R e v. : 6 D e c . , 2 0 1 1 Refrigeration Installation Evacuation Of The Lineset And Coil The line set and coil must be evacuated to at least 500 microns to remove any moisture and noncondensables. Evacuate the system through both service ports in the shipping position (full CW in - see table 6) to prevent false readings on the gauge because of pressure drop through service ports.
Residential Split Units - 60Hz Puron® R e v. : 6 D e c . , 2 0 1 1 Hot Water Generator The HWG (Hot Water Generator) or desuperheater option provides considerable operating cost savings by utilizing excess heat energy from the heat pump to help satisfy domestic hot water requirements. The HWG is active throughout the year, providing virtually free hot water when the heat pump operates in the cooling mode or hot water at the COP of the heat pump during operation in the heating mode.
Residential Split Units - 60Hz Puron® R e v. : 6 D e c . , 2 0 1 1 Hot Water Generator Installation The HWG is controlled by two sensors and a microprocessor control. One sensor is located on the compressor discharge line to sense the discharge refrigerant temperature. The other sensor is located on the HWG heat exchanger’s “Water In” line to sense the potable water temperature.
Residential Split Units - 60Hz Puron® R e v. : 6 D e c . , 2 0 1 1 Hot Water Generator For Indoor Compressor Section Only Warning! The HWG pump Is fully wired from the factory. Use extreme caution when working around the microprocessor control as it contains line voltage connections that presents a shock hazard that can cause severe injury or death! The heat pump, water piping, pump, and hot water tank should be located where the ambient temperature does not fall below 50°F [10°C].
Residential Split Units - 60Hz Puron® R e v. : 6 D e c . , 2 0 1 1 Hot Water Generator Module Refrigeration Installation For Outdoor Compressor Section Only General Information The HWG Module consists of an all-copper, vented doublewall heat exchanger and a water-cooled water circulating pump. The pump is controlled by a microprocessor in the HWG module. Power for the pump is provided from a remote 115 vac power source.
Residential Split Units - 60Hz Puron® R e v. : 6 D e c . , 2 0 1 1 Hot Water Generator Module Refrigeration Installation Outdoor Compressor Section Only Figure 16a: Outdoor Compressor Section HWG Installation Table 8: HWG Refrigerant Line Sizing Capacity Refr to HWG Line Set Size 1/2” OD 5/8” OD 3/4” OD 2 Ton Up to 16 ft. [4.9m] Up to 30 ft. [9.1m] N/A 3 Ton Up to 9 ft. [2.7m] Up to 25 ft. [7.6m] Up to 30 ft. [9.1m] 4 Ton Up to 5 ft. [1.5m] Up to 13 ft. [4.0m] Up to 30 ft. [9.
Residential Split Units - 60Hz Puron® R e v. : 6 D e c . , 2 0 1 1 Electrical - Line Voltage All final electrical connections must be made with a length of flexible conduit to minimize vibration and sound transmission to the building. ѥ WARNING! ѥ WARNING! To avoid possible injury or death due to electrical shock, open the power supply disconnect switch and secure it in an open position during installation.
Residential Split Units - 60Hz Puron® R e v. : 6 D e c . , 2 0 1 1 Electrical - Power Wiring Figure 18: Indoor Compressor Section Line Voltage Field Wiring Unit Power Supply (see electrical table for wire and breaker size) Figure 19: Outdoor Compressor Section Line Voltage Field Wiring Consult Electrical Table for wire and fuse size.
Residential Split Units - 60Hz Puron® R e v. : 6 D e c . , 2 0 1 1 Electrical - Low Voltage Wiring Thermostat Connections (Indoor Compresor Section) The thermostat should be wired directly to the CXM board. Figure 21 show low voltage wiring. Note that the air handler or furnace transformer will be used to power the CXM board in the compressor section. See “Electrical – Thermostat” for speci¿c terminal connections.
Residential Split Units - 60Hz Puron® R e v. : 6 D e c .
Residential Split Units - 60Hz Puron® R e v. : 6 D e c . , 2 0 1 1 Electrical - Low Voltage Wiring Note: This valve can overheat the anticipator of an electromechanical thermostat. Therefore, only relay or triac based thermostats should be used. Figure 23: FP1 Limit Setting CXM PCB JW3-FP1 jumper should be clipped for low temperature operation Accessory Connections A terminal paralleling the compressor contactor coil has been provided on the CXM control.
Residential Split Units - 60Hz Puron® R e v. : 6 D e c . , 2 0 1 1 Electrical - Low Vo Voltage Wiring WIRING Figure 27: Two-Stage Piping Solenoid Valve Figure 28a: Typical Thermostat Wiring, TAH AHU with AHU32U03/4 Flow Regulator T-Stat ATP32U03 ATP32U04 Fan Control Board Y2 Stage 2 To Discharge OUT TAH Air Handler Y2 Terminal Blocks in Compressor Section Y2 Stage 1 IN From Water Source NOTE: Shut-off valves, strainers and other required components not shown.
Residential Split Units - 60Hz Puron® R e v. : 6 D e c .
Residential Split Units - 60Hz Puron® R e v. : 6 D e c . , 2 0 1 1 CXM Controls CXM Control For detailed control information, see CXM Application, Operation and Maintenance (AOM) manual (part #97B0003N12). Field Selectable Inputs Test mode: Test mode allows the service technician to check the operation of the control in a timely manner. By momentarily shorting the test terminals, the CXM control enters a 20 minute test mode period in which all time delays are sped up 15 times.
Residential Split Units - 60Hz Puron® R e v. : 6 D e c . , 2 0 1 1 CXM Controls Safety Features – CXM Control The safety features below are provided to protect the compressor, heat exchangers, wiring and other components from damage caused by operation outside of design conditions. Anti-short cycle protection: The control features a 5 minute anti-short cycle protection for the compressor. Note: The 5 minute anti-short cycle also occurs at power up.
Residential Split Units - 60Hz Puron® R e v. : 6 D e c . , 2 0 1 1 CXM Controls CXM Control Start-up Operation Table 12: Nominal resistance at The control will not operate until all inputs and safety controls various temperatures are checked for normal conditions. The compressor will have a Temp Temp Resistance Temp 5 minute anti-short cycle delay at power-up.
Residential Split Units - 60Hz Puron® R e v. : 6 D e c . , 2 0 1 1 Unit Starting and Operating Conditions Operating Limits Environment – GT-PX units are designed for indoor installation only. Never install in areas subject to freezing or where humidity levels could cause cabinet condensation (such as unconditioned spaces subject to 100% outside air). Power Supply – A voltage variation of +/– 10% of nameplate utilization voltage is acceptable.
Residential Split Units - 60Hz Puron® R e v. : 6 D e c . , 2 0 1 1 Unit Starting and Operating Conditions Unit and System Checkout BEFORE POWERING SYSTEM, please check the following: UNIT CHECKOUT φ Balancing/shutoff valves: Insure that all isolation valves are open and water control valves are wired. φ Line voltage and wiring: Verify that voltage is within an acceptable range for the unit and wiring and fuses/ breakers are properly sized. Verify that low voltage wiring is complete.
Residential Split Units - 60Hz Puron® R e v. : 6 D e c . , 2 0 1 1 Unit Start-Up Procedure b. Check for cool air delivery at the unit grille within a few minutes after the unit has begun to operate. Note: Units have a Äve minute time delay in the control circuit that can be bypassed on the CXM/ DXM control board as shown below in Figure 20. See controls description for details. c.
Residential Split Units - 60Hz Puron® R e v. : 6 D e c . , 2 0 1 1 Unit Operating Conditions Table 12: Two-Stage Puron® Compressor Section Coax Water Pressure Drop Model 026 038 049 064 GPM 4.0 6.0 7.0 8.0 4.0 6.0 8.0 9.0 5.5 8.3 11.0 12.0 7.0 10.5 14.0 15.0 Table 15: Water Temperature Change Through Heat Exchanger Pressure Drop (psi) 30°F 50°F 70°F 90°F 1.5 3.1 4.1 5.1 1.2 2.6 4.5 5.7 1.1 2.2 3.9 4.5 0.5 1.9 3.9 4.8 1.3 2.6 3.4 4.3 1.0 2.5 4.2 5.2 0.9 2.1 3.6 4.2 0.3 1.8 3.5 4.3 1.1 2.3 3.
Residential Split Units - 60Hz Puron® R e v. : 6 D e c . , 2 0 1 1 Unit Operating Conditions Table 14c: Size 049 Two-Stage Puron® Typical Unit Operating Pressures and Temperatures Full Load Cooling - without HWG active Entering Water Temp °F Water Flow GPM/ ton Suction Pressure PSIG Discharge Pressure PSIG Superheat Subcooling 30* 1.5 2.25 3 112-122 111-121 111-121 187-207 167-187 147-167 18-23 18-23 18-23 50 1.5 2.25 3 125-135 123-133 122-132 245-265 227-247 208-228 1.5 2.
Residential Split Units - 60Hz Puron® R e v. : 6 D e c . , 2 0 1 1 Preventive Maintenance Water Coil Maintenance (Direct ground water applications only) If the system is installed in an area with a known high mineral content (125 P.P.M. or greater) in the water, it is best to establish a periodic maintenance schedule with the owner so the coil can be checked regularly. Consult the well water applications section of this manual for a more detailed water coil material selection.
Residential Split Units - 60Hz Puron® R e v. : 6 D e c . , 2 0 1 1 Troubleshooting General If operational difÄculties are encountered, perform the preliminary checks below before referring to the troubleshooting charts. • Verify that the unit is receiving electrical supply power. • Make sure the fuses in the fused disconnect switches are intact. After completing the preliminary checks described above, inspect for other obvious problems such as leaking connections, broken or disconnected wires, etc.
Residential Split Units - 60Hz Puron® R e v. : 6 D e c . , 2 0 1 1 CXM Process Flow Chart ѥ WARNING! ѥ WARNING! HAZARDOUS VOLTAGE! DISCONNECT ALL ELECTRIC POWER INCLUDING REMOTE DISCONNECTS BEFORE SERVICING. Failure to disconnect power before servicing can cause severe personal injury or death.
Residential Split Units - 60Hz Puron® R e v. : 6 D e c . , 2 0 1 1 Functional Troubleshooting Fault Main power problems HP Fault Code 2 Htg Clg Possible Cause Air temperature out of range in heating Overcharged with refrigerant Bad HP Switch Insuf¿cient charge X Compressor pump down at start-up Check charge and start-up water Àow.
Residential Split Units - 60Hz Puron® R e v. : 6 D e c . , 2 0 1 1 Functional Troubleshooting Only Compressor Runs X X X X X X X X Fan motor X X Thermostat wiring X Reversing valve X X Thermostat setup Thermostat wiring X Thermostat wiring Unit Doesn’t Operate in Cooling Thermostat wiring Fan motor relay Check G wiring at heat pump. Jumper G and R for fan operation Jumper G and R for fan operation. Check for Line voltage across BR contacts.
Residential Split Units - 60Hz Puron® R e v. : 6 D e c .
3OHDVH UHIHU WR WKH &DUULHU ,QVWDOODWLRQ 2SHUDWLRQ DQG 0DLQWHQDQFH 0DQXDO IRU RSHUDWLQJ DQG PDLQWHQDQFH LQVWUXFWLRQV 5HY 3DUW 1R &$ 127( 6RPH VWDWHV RU &DQDGLDQ SURYLQFHV GR QRW DOORZ OLPLWDWLRQV RQ KRZ ORQJ DQ LPSOLHG ZDUUDQW\ ODVWV RU WKH OLPLWDWLRQ RU H[FOXVLRQV RI FRQVHTXHQWLDO RU LQFLGHQWDO GDPDJHV VR WKH IRUHJRLQJ H[FOXVLRQV DQG OLPLWDWLRQV PD\ QRW DSSO\ WR \RX 7KLV ZDUUDQW\ JLYHV \RX VSHFLÀF OHJDO ULJKWV DQG \RX PD\ DOVR KDYH RWKHU ULJKWV ZKLFK YDU\ IURP VWDWH WR VWDWH
Residential Split Units - 60Hz Puron® R e v. : 6 D e c .
Residential Split Units - 60Hz Puron® R e v. : 6 D e c . , 2 0 1 1 Revision History Date Page # Description 6 Dec.
