Q5RF SERIES 15 SEER USER’s MANUAL & INSTALLATION INSTRUCTIONS Single Package Heat Pump - 2 Stage, R-410A IMPORTANT Please read this information thoroughly and become familiar with the capabilities and use of your appliance before attempting to operate or maintain this unit. Keep this literature 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.
USER INFORMATION About the Heat Pump ................................... 3 Operating Instructions ................................ 3 Cooling Operation .................................... 3 Heating Operation.................................... 3 Emergency Heat ...................................... 3 Defrost ..................................................... 3 System Shutdown .................................... 3 INSTALLER INFORMATION Safety Information ........................................
USER INFORMATION ABOUT THE HEAT PUMP Your heat pump is a unique, all weather comfortcontrol appliance that will heat and cool your home year round and provide energy saving comfort. It’s an unknown fact that heat is always in the air, even when the outside temperature is below freezing. The heat pump uses this basic law of physics to provide energy saving heat during the winter months. For example, If the outdoor temperature is 47° F (8° C), your heat pump can deliver approximately 3.
INSTALLER INFORMATION SAFETY INFORMATION WARNING: The information listed below must be followed during the installation, service, and operation of this unit. Unqualified individuals should not attempt to interpret these instructions or install this equipment. Failure to follow safety recommendations could result in possible damage to the equipment, serious personal injury or death. • The installer must comply with all local codes and regulations which govern the installation of this type of equipment.
Air Duct System Air ducts must be installed in accordance with the standards of the National Fire Protection Association “Standard for Installation of Air Conditioning and Ventilation Systems” (NFPA 90A), “Standard for Installation of Residence Type Warm Air Heating and Air Conditioning Systems” (NFPA 90B), these instructions, and all applicable codes. NFPA publications are avaialable by writing to: National Fire Protection Association, Batterymarch Park, Quincy, ME 02269 or visit www.NFPA.org on the web.
24" TOP OF UNIT TO BE UNOBSTRUCTED 12" 12" Transition Du ct Screws 14” Duct Dim ples 0" Figure 3. Minimum Unit Clearances Supply Air Return Air Figure 4. Return and Supply Air Fittings Installing Return & Supply Air Fittings The supply and return fittings are included with the unit and located in the supply duct. They attach to the unit openings (Figure 4) with a flange and bead arrangement and may be, secured with two sheet metal screws.
NOTE: The return air box with grille and filter (Figure 6) should not be located in heavy traffic areas like hallways or center of rooms. A good spot is in a corner or under a table, if a minimum two inch clearance is available. 1. Start the installation from under the home by cutting a small hole in the subfloor. Determine how the floor joist location will affect cutting the opening needed for the return air box. NOTE: Floor joists are generally located on 16” centers, leaving 14-3/8” between joists. 2.
ELECTRICAL CONNECTIONS WARNING: To avoid electric shock, personal injury, or death, turn off the electric power at the disconnect or the main service panel before making any electrical connections. • E l e c t r i c a l c o n n e c t i o n s mu s t b e i n compliance with all applicable local codes and ordinances, and with the current revision of the National Electric Code (ANSI/NFPA 70).
Overcurrent Protection Overcurrent protection must be provided at the branch circuit distribution panel and sized as shown on the unit rating label and according to applicable local codes. Generally, the best fuse or breaker for any heat pump is the smallest size that will permit the equipment to run under normal usage and provide maximum equipment protection. Properly sized fuses and breakers also prevent nuisance trips during unit startup. If a fuse blows or a breaker trips, always determine the reason.
Demand Defrost Control The demand defrost board controls the defrost cycle in response to ambient temperature, outdoor coil temperature and accumulated compressor run time.The heat pump is allowed to operate in the heating mode until the combination of outdoor ambient and outdoor coil temperatures indicate that defrosting is necessary, based on the programmed defrost curve. There are four preprogrammed defrost curves on the board. A jumper pin is used to switch between the different curves.
Green (from blower relay) M SW REV VALVE INDOOR THERMOSTAT SUB-BASE Blower Relay PRESS Y2 FAN O W2 W2 IN OUT E Accessory Heat Plug COND Y O AMBIENT C Y1 AMBG R C COILG L R W1 = 1st Stage Auxillary Heat DEMAND DEFROST CONTROL BOARD W1 COIL TEST G Y1 = 1st Stage Heat Pump Y2 = 2nd Stage Heat Pump AMBIENT SENSOR COIL SENSOR Outdoor Thermostat (optional) Compressor Solenoid ECM Motor (if applicable) Demand Defrost Board 1 2 3 4 5 6 7 8 9 Brown Orange Typical Wiring (Field
STARTUP & ADJUSTMENTS Pre-Start Checklist The following check list should be observed prior to starting the unit. Is the unit level? Unit should be level or slightly slanted toward the drain for proper condensate drainage. Is the unit installed with the proper clearances as listed in Figure 3 (page 6)? Is the wiring correct according to the wiring diagram and electrical codes? Are all the wiring connections tight? Check the condenser fan to make sure it turns freely.
Cooling Mode When the TEST pins are shorted together for more than 1 second, the Anti Short Cycle Timer will be bypassed. Adjustment of Refrigerant Charge CAUTION: This heat pump contains liquid and gaseous refrigerant under pressure. Adjustment of refrigerant charge should only be attempted by qualified, trained personnel thoroughly familiar with the equipment and safe responsible refrigerant handling procedures. Under no circumstances should the homeowner attempt to install and/or service this equipment.
Refrigerant Charging Charts for Cooling Mode of Operation Q5RF-X24K CHARGING CHART 600 575 550 525 500 R em ove refrigerant w hen above c urve LIQUID PRESSURE (PSIG) 475 450 425 400 375 350 325 Add refrigerant w hen below c urve 300 275 250 225 200 70 75 80 85 90 95 100 105 110 115 120 125 130 135 140 135 140 LIQUID TEMPERATURE (F) Figure 11.
Refrigerant Charging Charts for Cooling Mode of Operation - Continued Q5RF-X48K CHARGING CHART 600 575 550 525 500 R em ove refrigerant w hen above c urve LIQUID PRESSURE (PSIG) 475 450 425 400 375 350 325 Add refrigerant w hen below c urve 300 275 250 225 200 70 75 80 85 90 95 100 105 110 115 120 125 130 135 140 135 140 LIQUID TEMPERATURE (F) Figure 13.
10 Disch. Suc. Liquid Temp. Press. Press. 102 50 224 100 51 230 98 236 52 96 53 242 54 94 248 92 55 254 90 56 260 0 Suc. Liquid Press Press. 37 188 38 195 202 39 40 209 41 216 42 223 43 230 20 Disch. Suc. Liquid Temp. Press. Press. 114 63 261 112 64 265 110 270 65 108 66 275 67 106 280 104 68 284 102 69 289 20 Disch. Suc. Liquid Temp. Press. Press. 128 67 247 126 68 252 124 257 69 122 70 261 71 120 266 118 72 271 116 73 276 50 Disch. Suc. Liquid Temp. Press. Press.
10 Disch. Suc. Liquid Temp. Press. Press. 104 46 229 102 47 235 100 241 48 98 49 247 50 96 253 94 51 258 92 52 264 0 Suc. Liquid Press Press. 31 205 32 212 219 33 34 226 35 233 36 240 37 247 20 Disch. Suc. Liquid Temp. Press. Press. 113 61 253 111 62 258 109 262 63 170 64 267 65 105 272 103 66 277 101 67 282 20 Disch. Suc. Liquid Temp. Press. Press. 157 61 272 155 62 277 153 282 63 151 64 286 65 149 291 147 66 296 145 67 301 50 Disch. Suc. Liquid Temp. Press. Press.
Figure 15.
Figure 16.
COMPONENT FUNCTIONS Low Pressure Switch The low pressure switch is factory installed and located in the suction line internal to the unit. The switch is designed to protect the compressor if a loss of charge occurs. Under normal conditions, the switch is closed. High Pressure Switch The high pressure switch is factory installed and located in the compressor discharge line internal to the unit. The switch is designed to deenergize the system when very high pressures occur during abnormal conditions.