Nordyne Two Stage R-410A Split System User's Information/Installation Instructions
Outdoor heat pump
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Outdoor Heat Pump
User's Information/Installation Instructions
Two Stage R-410A Split System
These units have been designed and tested for capacity and effi ciency in accordance with A.R.I.
Standards. Split System Heat Pump units are designed for use with a wide variety of fossil fuel
furnaces, electric furnaces, air handlers, and evaporator coil combinations.
These instructions are primarily intended to assist qualifi ed individuals experienced in the proper
installation of heating and/or air conditioning appliances. Some local codes require licensed
installation/service personnel for this type of equipment. Read all instructions carefully before
starting the installation.
USER'S INFORMATION
Read this owner information to become familiar with the capabilities and use of your appliance.
Keep this with literature on other appliances where you have easy access to it in the future. If a
problem occurs, check the instructions and follow recommendations given. If these suggestions
don't eliminate your problem, call your servicing contractor.
Heat Pump Principle of Operation
WINTER HEATING
1. Outdoor air enters heat pump.
2. Cold, heat-transfer section (outdoor coil)
extracts heat from outdoor air as refrigerant
evaporates from a liquid to a gas.
3. Refrigerant, compressed to a hot gas by
heat pump, carries the heat to the hot heat-
transfer section (indoor coil).
4. Hot, heat-transfer section (indoor coil)
releases the heat to indoor air as refrigerant
condenses from a gas to a liquid.
5. Air handler circulates the heat throughout
the home.
6. Refrigerant returns to outdoor coil and
evaporates once again to absorb more
heat.
IMPORTANT
SUMMER COOLING
1. Indoor air enters the air handler section.
2. Cold, heat-transfer section (indoor coil)
extracts heat from indoor air as refrigerant
evaporates from a liquid to a cold gas.
3. Refrigerant, drawn to heat pump and
compressed to a hot gas by heat pump,
carries the heat outdoors.
4. Hot, heat-transfer section (outdoor coil)
releases the heat as refrigerant condenses
from a gas to a liquid.
5. Heat pump (outdoor fan) discharges the
heat to outside air.
6. Refrigerant returns to indoor coil and
evaporates once again to absorb more
heat.
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Table of Contents
Related Manuals for Nordyne Two Stage R-410A Split System
Summary of Contents for Nordyne Two Stage R-410A Split System
- Page 1 Outdoor Heat Pump User’s Information/Installation Instructions Two Stage R-410A Split System These units have been designed and tested for capacity and effi ciency in accordance with A.R.I. Standards. Split System Heat Pump units are designed for use with a wide variety of fossil fuel furnaces, electric furnaces, air handlers, and evaporator coil combinations.
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Page 2: Operating Instructions
OPERATING INSTRUCTIONS 2. Set the thermostat temperature to the desired temperature level using the temperature selector. Please refer to TO OPERATE YOUR HEAT PUMP the separate detailed thermostat user’s manual for complete instructions regarding FOR COOLING — thermostat programming. The outdoor unit and indoor blower will both cycle on and off 1. - Page 3 The continuous indoor blower operation can be of snow and ice on the heat transfer coil. obtained with the thermostat system switch set This is normal, and the unit will periodically in any position, including OFF. defrost itself. At the beginning of the defrost cycle, both the outdoor condenser fan The continuous indoor blower operation is and compressor will de-energize.
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Page 4: General Information
Read Your Warranty and gaseous refrigerant under pressure. Installation and servicing of this equipment Please read the separate warranty document should be accomplished by qualifi ed, trained completely. It contains valuable information personnel thoroughly familiar with this type of about your system. equipment. -
Page 5: Installing The Outdoor Unit
Facility Prerequisites — Electrical power General — Once outdoor and indoor unit supplied must be adequate for proper operation placement has been determined, route refrigerant of the equipment. The system must be wired and tubing between the equipment in accordance with provided with circuit protection in accordance sound installation practices. -
Page 6: Startup And Checkout
greater than that indicated on the outdoor unit Wiring Diagram/Schematic — A wiring rating label. Refer to the unit wiring diagram for diagram/schematic is located on the inside cover connection details. of the electrical box of the outdoor unit. The installer should become familiar with the wiring Minimum Circuit Ampacity —... -
Page 7: Air Handler
Thermostat G R W2 C E O Y1 W1 W3 NOTE: Jumper W1 and W2 together. O Y1 Yellow/ Black Air Handler Heat Pump OD Section Typical 2-Stage Cooling Heat Pump with Optional Indoor Thermostat and Variable Speed Air Handler... -
Page 8: Functional Checkout
Outdoor Unit — Ensure the outdoor coil and compressor from abnormal temperatures that top of the unit are free from obstructions and may occur if there is a loss of charge. Under debris, and all equipment access/control panels normal conditions, the switch is closed. If the are in place. - Page 9 NOTE: This module does not provide safety 24 VAC Power Wiring — The Comfort Alert protection! The Comfort Alert module is a module requires a constant nominal 24 VAC monitoring device and cannot control or shut power supply. The wiring to the module’s R and down other devices.
- Page 10 Status LED Status LED Description Status LED Troubleshooting Information Green “POWER” Module has power Supply voltage is present at module terminals 1. Compressor protector is open Red “TRIP” Thermostat demand signal Y is present, but the • Check for high head pressure compressor is not •...
- Page 11 Status LED Status LED Description Status LED Troubleshooting Information 1. Outdoor unit power disconnect is open Yellow “ALERT” Open Circuit 2. Compressor circuit breaker or fuse(s) is open Flash Code 5 3. Compressor contactor has failed open • Check compressor contactor wiring and connectors •...
- Page 12 Miswired Module Indication Recommended Troubleshooting Action Green LED is not on, Determine if both R and C module terminals are module does not power up connected. Verify voltage is present at module’s R and C terminals. Review 24VAC Power W iring (page 4) for R and C wiring.
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Page 13: Adjustment Of Refrigerant Charge
through the test function, this delay is cancelled Adjustment of Refrigerant Charge: and the compressor will not de-energize. This 2- stage unit will defrost in whichever stage is called for by the thermostat. If only Y1 is energized, then CAUTION: the unit will defrost in low stage. - Page 14 If the pressure measured in step 1 is less System Charge than the required liquid refrigerant pressure Tonnage R-410A oz. determined in step 4, then there is too little charge in the system. Add refrigerant and 2 Ton repeat steps 1 through 3 until the system 3 Ton is correctly charged.
- Page 15 Remove refrigerent when above Add refrigerent when below curve 95 100 105 110 115 120 125 Liquid Temperature (F) Figure 4. Charging Chart for 3 ton R-410A HP unit in cooling mode with TXV Remove refrigerent when above curve Add refrigerent when below curve 100 105 110 115 120 125 Liquid Temperature (F) Figure 5.
- Page 16 Remove refrigerent when above curve Add refrigerent when below curve 100 105 110 115 120 125 Liquid Temperature (F) Figure 6. Charging Chart for 5 ton R-410A HP unit in cooling mode with TXV INSTALLER: PLEASE LEAVE THESE INSTALLATION INSTRUCTIONS WITH THE HOMEOWNER.