GT-PCS Digital Indoor Split Series (50YGS Models) GT-PCS Digital Outdoor Split Series (50YGP Models) Installation, Operation and Maintenance Instructions Residential Split Geothermal Heat Pumps 97B0048N06 Created: 29 Aug.
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G T- P C S S p l i t U n i t s - 6 0 H z P u r o n ® Created: 29 Aug.
G T- P C S S p l i t U n i t s - 6 0 H z P u r o n ® Created: 29 Aug., 2013 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.
G T- P C S S p l i t U n i t s - 6 0 H z P u r o n ® Created: 29 Aug., 2013 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.
G T- P C S S p l i t U n i t s - 6 0 H z P u r o n ® Created: 29 Aug., 2013 Equipment Selection 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.
G T- P C S S p l i t U n i t s - 6 0 H z P u r o n ® Created: 29 Aug., 2013 Installation 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.
G T- P C S S p l i t U n i t s - 6 0 H z P u r o n ® Created: 29 Aug., 2013 Installation Figure 1: 50YGS Installation Figure 3: 50YGP Installation Stainless Steel Braided Connecting Hoses Air Pad With Access Hole Water Connections The TTS models utilize swivel piping fittings for water connections that are rated for 450 psi (3101 kPa) operating pressure.
G T- P C S S p l i t U n i t s - 6 0 H z P u r o n ® Created: 29 Aug., 2013 Integrated Variable-Speed Water Flow Control Heat Pump Applications Overview Integrated Variable-Speed Water Flow Control is a revolutionary new, intelligent, and efficient way to circulate water (or water plus antifreeze) using INTERNAL, variable water flow control. The factory-installed high-efficiency variable-speed pump uses 60%-80% less wattage than a traditional fixed speed pump.
G T- P C S S p l i t U n i t s - 6 0 H z P u r o n ® Created: 29 Aug., 2013 Closed Loop Heat Pump Applications with Internal Flow Controller Units with internal flow control come with a built-in variable speed pump, an expansion tank, flushing ports and threeway valves (used to flush the unit). The variable speed pump is controlled by the Communicating DXM2 board based on the difference between the entering and leaving water temperature (ΔT).
G T- P C S S p l i t U n i t s - 6 0 H z P u r o n ® Created: 29 Aug., 2013 Flushing the Earth Loop Once piping is completed between the unit and the ground loop, final purging and charging of the loop is needed. A flush cart (at least a 1.5 hp [1.1kW] pump) is needed to achieve adequate flow velocity in the loop to purge air and dirt particles from the loop itself. Antifreeze solution is used in most areas to prevent freezing.
G T- P C S S p l i t U n i t s - 6 0 H z P u r o n ® Created: 29 Aug., 2013 Flushing the Earth Loop NOTICE: Actual flushing time require will vary for each installation due to piping length, configuration, and flush cart pump capacity. 3/8” or less fluid level drop is the ONLY indication that flushing is complete. Figure 8b: Valve Position B - Unit Fill / Flush Loop Valve Position Switch valves to Position B to flush the unit. Flush through the unit until all air pockets have been removed.
G T- P C S S p l i t U n i t s - 6 0 H z P u r o n ® Created: 29 Aug., 2013 Flushing the Earth Loop the flush cart from the Internal Flow Controller. Install Flow Controller caps to ensure that any condensation/leakage remains contained within the Flow Controller package. If the loop pressure is between 50 and 75 psi [345 to 517 kPa] upon completion of flushing, pressures should be sufficient for all seasons.
G T- P C S S p l i t U n i t s - 6 0 H z P u r o n ® Created: 29 Aug., 2013 Multiple Unit Piping and Flushing Often projects require more than one heat pump. Where possible, it makes sense for multiple units to share a common ground loop. Common ground loops for multiple units bring new challenges including the need to avoid backward flow through inactive units, increased pumping requirements, and more complex flushing needs.
G T- P C S S p l i t U n i t s - 6 0 H z P u r o n ® Created: 29 Aug., 2013 Multiple Unit Piping and Flushing Again, flush the loop through the internal flushing valves. This is important as there may be air/debris in the lines from this unit to the common piping. Once flushing begins the air will be move into the loop and will need to be flushed out. After the loop is flushed through the second unit, change the flushing valves to flush the second unit.
G T- P C S S p l i t U n i t s - 6 0 H z P u r o n ® Created: 29 Aug., 2013 Multiple Unit Piping and Flushing - Indoor Split (50YGS Only) Multiple Units with Internal Modulating Valves and Central Pump This is an application where multiple units are used in conjunction with a central, variable speed pump. In this case, units with closed loop modulating valves are used (do not use open loop modulating valves on a closed loop system). External flushing valves are required.
G T- P C S S p l i t U n i t s - 6 0 H z P u r o n ® Created: 29 Aug., 2013 Ground Loop Heat Pump Applications Antifreeze Selection - General In areas where minimum entering loop temperatures drop below 40°F [4.4°C] or where piping will be routed through areas subject to freezing, antifreeze is needed. Alcohols and glycols are commonly used as antifreeze solutions. Your local representative should be consulted for the antifreeze best suited to your area. Freeze protection should be maintained to 15°F [8.
G T- P C S S p l i t U n i t s - 6 0 H z P u r o n ® Created: 29 Aug., 2013 Ground Loop Heat Pump Applications Chart 1a: Methanol Specific Gravity Specific Gravity 1.000 0.995 0.990 0.985 0.980 0.975 0.970 0.965 0.960 -50°F -40°F -30°F -20°F -10°F 0°F 10°F 20°F 30°F 40°F 50°F -45.6°C -34.4°C -23.3°C -12.2°C -1.1°C 10°C -40°C -28.9°C -17.8°C -6.7°C 4.4°C Low Temperature Protection Chart 1b: Propylene Glycol Specific Gravity 1.07 Specific Gravity color of the discharge fluid.
G T- P C S S p l i t U n i t s - 6 0 H z P u r o n ® Created: 29 Aug.
G T- P C S S p l i t U n i t s - 6 0 H z P u r o n ® Created: 29 Aug., 2013 Open Loop or Ground-Water Heat Pump Applications Once flushing is complete, press the lock release again and return the valve handle to its normally closed position.
G T- P C S S p l i t U n i t s - 6 0 H z P u r o n ® Created: 29 Aug., 2013 Open Loop or Ground-Water Heat Pump Applications The pump should be sized to handle the home’s domestic water load (typically 5-9 gpm [23-41 l/m]) plus the flow rate required for the heat pump. Pump sizing and expansion tank must be chosen as complimentary items. For example, an expansion tank that is too small can cause premature pump failure due to short cycling.
G T- P C S S p l i t U n i t s - 6 0 H z P u r o n ® Created: 29 Aug., 2013 Refrigeration Installation CAUTION! CAUTION! Puron® systems operate at higher pressures than R-22 systems. Be certain that service equipment (gauges, tools, etc.) is rated for Puron®. Some R-22 service equipment may not be acceptable. CAUTION! CAUTION! Installation of a factory supplied liquid line bi-directional filter drier is required. Never install a suction line filter in the liquid line.
G T- P C S S p l i t U n i t s - 6 0 H z P u r o n ® Created: 29 Aug.
G T- P C S S p l i t U n i t s - 6 0 H z P u r o n ® Created: 29 Aug., 2013 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.
G T- P C S S p l i t U n i t s - 6 0 H z P u r o n ® Created: 29 Aug., 2013 Refrigeration Installation 7. 8. 9. 10. 11. 12. 13. 14. the existing refrigerant flow control orifice or thermal expansion valve prior to flushing is highly recommended to assure proper flushing. Use a field-provided fitting 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.
G T- P C S S p l i t U n i t s - 6 0 H z P u r o n ® Created: 29 Aug., 2013 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.
G T- P C S S p l i t U n i t s - 6 0 H z P u r o n ® Created: 29 Aug.
G T- P C S S p l i t U n i t s - 6 0 H z P u r o n ® Created: 29 Aug., 2013 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.
G T- P C S S p l i t U n i t s - 6 0 H z P u r o n ® Created: 29 Aug., 2013 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.
G T- P C S S p l i t U n i t s - 6 0 H z P u r o n ® Created: 29 Aug., 2013 Hot Water Generator Installation The HWG is controlled by two sensors and the DXM2 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.
G T- P C S S p l i t U n i t s - 6 0 H z P u r o n ® Created: 29 Aug., 2013 Hot Water Generator For Indoor and Outdoor Compressor Section 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].
G T- P C S S p l i t U n i t s - 6 0 H z P u r o n ® Created: 29 Aug., 2013 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.
G T- P C S S p l i t U n i t s - 6 0 H z P u r o n ® Created: 29 Aug.
G T- P C S S p l i t U n i t s - 6 0 H z P u r o n ® Created: 29 Aug., 2013 Electrical - Line Voltage WARNING! 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. CAUTION! CAUTION! Use only copper conductors for field installed electrical wiring. Unit terminals are not designed to accept other types of conductors.
G T- P C S S p l i t U n i t s - 6 0 H z P u r o n ® Created: 29 Aug., 2013 Electrical - Power Wiring Figure 22: Indoor Compressor Section (50YGS) Line Voltage Field Wiring Unit Power Supply (see electrical table for wire and breaker size) Figure 23: Outdoor Compressor Section (50YGP) Line Voltage Field Wiring Consult Electrical Table for wire and fuse size.
G T- P C S S p l i t U n i t s - 6 0 H z P u r o n ® Created: 29 Aug., 2013 Electrical - HWG Wiring Remote HWG Kit Wiring Installation 1. Disconnect power to outdoor unit and HWG kit module. 2. Open access panel to locate factory-installed terminal block inside the HWG module. 3. Connect four T-stat field-supplied wires on the opposite side of terminal block where thermistors are connected. Next, route T-stat wires thru HWG module kit cabinet to the outdoor unit. 4.
G T- P C S S p l i t U n i t s - 6 0 H z P u r o n ® Created: 29 Aug., 2013 Electrical - Thermostat Wiring Figure 26: Connection to thermostat and Air Handler/ Furnace Non CLM Typical Thermostat Compressor Compressor Stage 2 Y1 Reversing Valve 24Vac Hot O Fan 24Vac Common Alarm G C L Electric Heat Electric Heat W E Non CLM Typical Air Handler DXM2 Board Compressor Section Y1 Y2 O Y1 Y2 O R G C R G C Y2 R AL1 W1 W2 LT2 Air Coil Freeze LT2 Protection Sensor LT2 GT-PCS on both TES unit.
G T- P C S S p l i t U n i t s - 6 0 H z P u r o n ® Created: 29 Aug., 2013 DXM2 Controls DXM2 Controller The DXM2 is capable of 2-way communications with the Internal Flow Controller pump and the ACDU01A Configuration/Diagnostic tool. For most residential applications, configuration, monitoring and diagnostics can all be done from the Configuration/ Diagnostic tool so there’s no need to read LEDs and change DIP switches.
G T- P C S S p l i t U n i t s - 6 0 H z P u r o n ® Created: 29 Aug., 2013 DXM2 Layout and Connections shown in Figure 30 to change the setting to 10°F [-12.2°C] refrigerant cutout or fallout temperature, a more suitable temperature when using an antifreeze solution. All residential units include water/refrigerant circuit insulation to prevent internal condensation, which is required when operating with entering water temperatures below 59°F [15°C].
G T- P C S S p l i t U n i t s - 6 0 H z P u r o n ® Created: 29 Aug.
G T- P C S S p l i t U n i t s - 6 0 H z P u r o n ® Created: 29 Aug.
G T- P C S S p l i t U n i t s - 6 0 H z P u r o n ® Created: 29 Aug.
G T- P C S S p l i t U n i t s - 6 0 H z P u r o n ® Created: 29 Aug.
G T- P C S S p l i t U n i t s - 6 0 H z P u r o n ® Created: 29 Aug.
G T- P C S S p l i t U n i t s - 6 0 H z P u r o n ® Created: 29 Aug.
G T- P C S S p l i t U n i t s - 6 0 H z P u r o n ® Created: 29 Aug.
G T- P C S S p l i t U n i t s - 6 0 H z P u r o n ® Created: 29 Aug.
G T- P C S S p l i t U n i t s - 6 0 H z P u r o n ® Created: 29 Aug., 2013 Unit Starting and Operating Conditions Operating Limits Environment – 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.
G T- P C S S p l i t U n i t s - 6 0 H z P u r o n ® Created: 29 Aug., 2013 Unit Start-Up and Operating Conditions WARNING! WARNING! Polyolester Oil, commonly known as POE oil, is a synthetic oil used in many refrigeration systems including those with Puron® refrigerant. POE oil, if it ever comes in contact with PVC or CPVS piping, may cause failure of the PVC/CPVC.
G T- P C S S p l i t U n i t s - 6 0 H z P u r o n ® Created: 29 Aug., 2013 Unit Start-Up Procedure SERVICE MODE NOTE: Units have a five minute time delay in the control circuit that can be bypassed on the DXM2 control board by placing the unit in the “Test” mode as shown in the unit IOM. Check for normal air temperature rise of 20°F to 30°F (heating mode).
G T- P C S S p l i t U n i t s - 6 0 H z P u r o n ® Created: 29 Aug., 2013 Unit Operating Conditions Table 14: Coax Water Pressure Drop Model 026 038 049 064 GPM 2.3 3.0 3.4 4.5 6.0 3.0 4.5 6.0 6.8 9.0 4.5 6.0 6.8 9.0 12.0 6.0 7.5 9.0 11.3 12.0 15.0 Table 15: Water Temperature Change Through Heat Exchanger Pressure Drop (psi) 30°F 0.7 1.1 1.3 2.0 3.1 0.7 1.1 1.3 2.0 3.1 0.7 1.1 1.3 2.0 3.1 0.9 1.7 2.5 3.7 4.1 6.1 50°F 0.4 0.7 0.9 1.4 2.3 0.9 1.7 2.7 3.2 5.2 0.6 1.1 1.4 2.5 4.2 0.2 0.9 1.5 2.6 3.
G T- P C S S p l i t U n i t s - 6 0 H z P u r o n ® Created: 29 Aug., 2013 Unit Operating Conditions Table 16c: Size 049 Typical Unit Operating Pressures and Temperatures Entering Water Temp °F Water Flow GPM 30* Full Load Cooling - without HWG active Suction Pressure PSIG Discharge Pressure PSIG Superheat Subcooling 3.1 3.1 3.1 117-127 117-127 117-127 222-242 222-242 222-242 16-21 16-21 16-21 50 6 6.2 6.
G T- P C S S p l i t U n i t s - 6 0 H z P u r o n ® Created: 29 Aug., 2013 Table 18a: Performance Data — 50YGS/50YGP Model 026 Full Load 850 CFM Nominal (Rated) Airflow Cooling, 850 CFM Nominal (Rated) Airflow Heating Cooling - EAT 80/67°F EWT °F GPM 20 30 40 50 60 70 80 90 100 110 120 WPD Heating - EAT 70°F TC SC kW HR EER LWT 1.20 33.6 PSI FT 1.3 0.6 1.4 29.5 20.6 1.7 1.7 1.7 2.2 2.2 2.2 3.0 3.4 3.4 3.0 4.5 6.0 3.0 4.5 6.0 3.0 4.5 6.0 3.0 4.5 6.0 3.0 4.5 6.0 3.0 4.5 6.0 3.0 4.5 6.
G T- P C S S p l i t U n i t s - 6 0 H z P u r o n ® Created: 29 Aug., 2013 Table 18b: Performance Data — 50YGS/50YGP Model 038 Full Load 1250 CFM Nominal (Rated) Airflow Cooling, 1250 CFM Nominal (Rated) Airflow Heating Cooling - EAT 80/67°F EWT °F GPM 20 30 40 50 60 70 80 90 100 110 120 WPD Heating - EAT 70°F TC SC kW HR EER LWT WPD YGS YGP GPM HWC HWC PSI FT kW HE COP LAT LWT YGS YGP HWC HWC PSI FT 2.1 1.5 3.4 45.7 31.2 1.88 52.2 24.4 70.0 1.9 1.8 9.0 8.3 19.2 24.7 1.
G T- P C S S p l i t U n i t s - 6 0 H z P u r o n ® Created: 29 Aug., 2013 Table 18c: Performance Data — 50YGS/50YGP Model 049 Full Load 1500 CFM Nominal (Rated) Airflow Cooling, 1500 CFM Nominal (Rated) Airflow Heating Cooling - EAT 80/67°F EWT °F GPM 20 30 40 50 60 70 80 90 100 110 120 WPD Heating - EAT 70°F WPD YGS YGP GPM HWC HWC PSI FT TC SC kW HR EER LWT 0.6 58.4 39.0 2.55 67.1 22.9 70.0 2.3 2.2 12.0 5.3 0.6 0.6 0.6 1.1 1.1 1.1 2.0 2.6 2.6 1.9 4.7 8.4 1.8 4.5 8.1 1.8 4.4 7.8 1.
G T- P C S S p l i t U n i t s - 6 0 H z P u r o n ® Created: 29 Aug., 2013 Table 18d: Performance Data — 50YGS/50YGP Model 064 - Full Load 1850 CFM Nominal (Rated) Airflow Cooling, 1850 CFM Nominal (Rated) Airflow Heating Cooling - EAT 80/67°F EWT °F GPM 20 30 40 50 60 70 80 90 100 110 120 WPD Heating - EAT 70°F TC SC kW HR EER LWT WPD YGS YGP GPM HWC HWC PSI FT kW HE COP LAT LWT YGS YGP HWC HWC PSI FT 3.1 0.1 0.1 67.5 46.6 3.24 78.6 20.8 70.0 2.8 2.7 15.0 7.3 16.8 40.0 3.
G T- P C S S p l i t U n i t s - 6 0 H z P u r o n ® Created: 29 Aug., 2013 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.
G T- P C S S p l i t U n i t s - 6 0 H z P u r o n ® Created: 29 Aug., 2013 Troubleshooting General If operational difficulties 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.
G T- P C S S p l i t U n i t s - 6 0 H z P u r o n ® Created: 29 Aug., 2013 Troubleshooting Outputs The compressor and reversing valve relays are 24VAC and can be verified using a voltmeter. The alarm relay can either be 24VAC as shipped or dry contacts for use with DDC controls by clipping the JW1 jumper. Electric heat outputs are 24VDC “ground sinking” and require a voltmeter set for DC to verify operation.
G T- P C S S p l i t U n i t s - 6 0 H z P u r o n ® Created: 29 Aug., 2013 DXM2 Process Flow Chart WARNING! 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.
G T- P C S S p l i t U n i t s - 6 0 H z P u r o n ® Created: 29 Aug.
G T- P C S S p l i t U n i t s - 6 0 H z P u r o n ® Created: 29 Aug., 2013 Functional Troubleshooting (cont.
G T- P C S S p l i t U n i t s - 6 0 H z P u r o n ® Created: 29 Aug.
G T- P C S S p l i t U n i t s - 6 0 H z P u r o n ® Created: 29 Aug., 2013 Performance Troubleshooting (cont.
G T- P C S S p l i t U n i t s - 6 0 H z P u r o n ® Created: 29 Aug.
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G T- P C S S p l i t U n i t s - 6 0 H z P u r o n ® Created: 29 Aug.
G T- P C S S p l i t U n i t s - 6 0 H z P u r o n ® Created: 29 Aug., 2013 Revision History Page # 29 Aug., 13 All Description First Published R AI BR I HE AT P U M P S A TO NE WATER TO IFIED TO ARI A RT S C CE NG WITH LYI MP O IR MANUFACT UR ER Date IS O ST AND 3 ARD 1 ISO 9001:2008 Certified -1 R 25 6 Quality: First & Always 7300 S.W.
