Nordyne R-410A manuale d’uso

Outdoor Heat Pump T w o Stage R-410A Split System User’ s Man ual / Installation Instructions Please read this inf or mation thoroughly and become f amiliar with the capabilities and use of y our appliance bef ore attempting to operate or maintain this unit. K eep this liter ature where you ha v e easy access to it in the future . If a problem oc[...]

2[...]

3 Safety Inf ormation ........................................ 6 Pressures Within the System ..................... 6 Labels, T ags, and Precautions .................... 6 Brazing Operations ..................................... 6 General Information ..................................... 7 Outdoor Unit ...............................................[...]

4 ABOUT THE HEA T PUMP Y our heat pump is a unique, all weather comf or t- control appliance that will heat and cool your home year round and pro vide energy saving comf or t. It’ s an unknown f act that heat is always in the air , ev en when the outside temperature is below freezing. The heat pump uses this basic law of ph ysics to provide energ[...]

5 SYSTEM MAINTENANCE CA UTION: Shut off all electrical power to the unit before perf orming any maintenance or service on the system. Failure to compl y may result in per sonal injury or death. Proper maintenance is most impor tant to achiev e the best perf or mance from the appliance and should be perf or med by a qualifi ed ser vice technician a[...]

6 INST ALLER INFORMA TION SAFETY INFORMA TION IMPORT ANT : Saf ety markings are used frequently throughout this manual to designate a degree or le v el of seriousness and should not be ignored. W ARNING indicates a potentially hazardous situation that if not av oided, could result in personal injur y or death. CA UTION indicates a potentially hazar[...]

7 SITE PREP ARA TION Unpacking the Equipment Remov e the shipping car ton and User’ s Manual from the equipment. T ake care not to damage the tubing connections when removing the car ton. Inspect for Dama ge Inspect the equipment f or damage prior to installing the equipment at the job site. V er ify coil fi ns are straight. If necessar y , comb[...]

8 • The maximum recommended interconnecting refrigerant line length is 75 f eet, and the vertical ele vation diff erence between the indoor and outdoor sections should not e xceed 20 f eet. • If precise f or ming of refrigerant lines is required, a copper tubing bender is recommended. A v oid shar p bends and contact of the refrigerant lines wi[...]

9 COPPER WIRE SIZE — A WG (1% V oltage Dr op) Supply Wire Length-Feet Supply Cir cuit Ampacity 200 150 100 50 6 8 10 14 15 46 8 1 2 2 0 46 8 1 0 2 5 44 6 1 0 3 0 34 6 8 3 5 34 6 8 4 0 23 4 6 4 5 23 4 6 5 0 23 4 6 5 5 12 3 4 6 0 Wire Size based on N.E.C . for 60° type copper conductors. T able 1. Copper Wire Siz e • Connect the line-voltage lea[...]

10 again after the discharge pressure decreases to 460 psig. NO TE: When the switch opens and then closes, there will be a 3 min ute shor t cycling dela y bef ore the outdoor unit will energize . Under nor mal conditions the s witch is closed. Comfort Alert TM Diagnostics Module The Comf or t Aler t TM Diagnostics Module is a breakthrough innov ati[...]

11 FUNCTIONAL CHECK OUTS CA UTION: These units have a crankcase heater factory installed. W ait 24 hours prior to performing a function c heck out to allo w for heating of the compressor crankcase. Failure to compl y ma y result in damage and could cause premature failure of the system. Cooling Gradually lo wer the thermostat temperature setpoint b[...]

12 v erify system operation and compatibility with the heat pump . Ref er to the installation instructions f or this equipment and perf or m a functional check out in accordance with the manuf acturer’ s instructions. Indoor Blower 1. T urn the fan mode to ON. V er ify that the indoor blo wer is operating and that airfl o w is not restricted. 2.[...]

13 • If the REMO VE FOR NO DELA Y jumper is installed, the compressor will energize immediately f ollowing a 30-second dela y . Note : If the Y2 ther mostat input is energized (2 - stage system), the second stage will tur n on. If the abov e steps will not initiate a defrost, replace the defrost board. Anti Short Cycle Timer T est The 3-minute ti[...]

14 Cooling Charging Charts Figure 4. Charging Chart for 2 T on Units 250 275 300 325 350 375 400 425 450 475 70 75 80 85 90 95 100 105 110 115 120 125 Liquid T emperature (° F) Liquid Pressure (psig) Remov e refr igerant when abov e cur v e Add refrigerant when below curve Figure 5. Charging Chart for 3 T on Units Liquid T emperature (° F) Liquid[...]

15 Cooling Charging Charts (continued) Figure 6. Charging Chart for 4 T on Units Li q uid T em p erature ( ° F ) Liquid Pressure (psig) 250 275 300 325 350 375 400 425 450 475 500 70 75 80 85 90 95 100 105 110 115 120 12 5 Remov e refr igerant when abov e cur v e Add refrigerant when below curve Figure 7. Charging Chart for 5 T on Units Liquid T e[...]

16 Heating Charging Chart Figure 8. Heating Charging Chart Liquid T emperature (° F) Liquid Pressure (psig) 200 225 250 275 300 325 350 375 400 50 55 60 65 70 75 80 85 90 Remov e refr igerant when abov e cur v e Add refrigerant when below curve[...]

17 Status LED Status LED Description Status LED T r oubleshooting Information Green “PO WER” Module has power Supply v oltage is present at module ter minals Red “TRIP” Thermostat demand signal Y is present, but compressor is not running • Compressor protector is open • Check f or high head pressure • Check compressor supply v oltage [...]

18 Status LED Status LED Description Status LED T r oubleshooting Information Y ellow “ALER T” Flash Code 3 Shor t Cycling / Compressor is running only briefl y • Ther mostat demand signal is inter mittent • Low line v oltage (contact utility if v oltage at disconnect is low) • Excessive liquid refrigerant in compressor • Compressor be[...]

19 T able 5. Module Wiring T roub leshooting Miswired Module Indication Recommended T roubleshooting Action Green LED is not on, module does not pow er up • Deter mine if both R & C module ter minals are connected. • V er ify voltage is present at module’ s R & C ter minals. Green LED inter mittent, module pow ers up only when compres[...]

INST ALLER: PLEASE LEA VE THESE INST ALLA TION INSTR UCTIONS WITH THE HOMEO WNER. 708868A (Replaces 7088680) Specifi cations and illustr ations subject to change without notice t incurring obligations. Printed in U.S .A. (10/09) ¢708868b¤ 708868A O’F allon, MO[...]