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40QA024-060
Ceiling-Suspended Fan Coil Units
Installation, Start-Up and Service Instructions
CONTENTS SAFETY CONSIDERATIONS
Page
Installing and servicing air-conditioning equipment can be
SAFETY CONSIDERATIONS . . . . . . . . . . . . . . . . . . . . . . . . .1
hazardous due to system pressure and electrical components.
INSTALLATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-17
Only trained and qualified service personnel should install or
Step 1 — Complete Pre-Instal
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Table 1 — System Matches SYSTEM TYPE INDOOR SECTION NUMBER OUTDOOR SECTION NUMBER 40QAC 38HDR-3,5,6 024* 018 024 024 Cooling Only 036 030 036 036 048 048 060 060 40QAQ 38QRR-3,5,6 024* 018 024 024 Heat Pumps 036 030 036 036 048 048 060 060 40QAQ 38HDR-3,5,6 024* 018 024 024 Heating/Cooling 036 030 036 036 048 048 060 060 1 *Units must be field reconfigured for 1 / ton (18,000 Btuh) operation. See Before Installation sec- 2 tion on page 3 for details. NOTE: Numbers in ( ) indicate quantities when
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Table 3A — Physical Data, Under Ceiling Cooling Only Units SYSTEM SIZE 018* 024 030 036 048 060 1 NOMINAL CAPACITY (tons) 1 / 23345 2 NOMINAL SIZE (Btuh) 18,000 24,000 30,000 36,000 48,000 60,000 OPERATING WEIGHT (lb) 108 108 117 117 149 179 MOISTURE REMOVAL WEIGHT 4.0 7.3 6.0 9.0 13.0 14.5 (Pints/Hr) FINISH GM Motorhome White with Black Trim REFRIGERANT R-410A Control (Cooling) AccuRater Control INDOOR FAN Direct Drive Centrifugal Rpm...Cfm High 862...500 1050…600 1275...840 1275...840 1435...
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Table 3B — Physical Data, Under Ceiling Heat Pump Units UNIT SIZE 018* 024 030 036 048 060 1 NOMINAL CAPACITY (tons) 1 / 23 345 2 NOMINAL SIZE (Btuh) 18,000 24,000 30,000 36,000 48,000 60,000 OPERATING WEIGHT (lb) 110 110 119 119 151 181 MOISTURE REMOVAL WEIGHT 4.0 7.3 6.0 9.0 13.0 14.5 (Pints/Hr) FINISH GM Motorhome White with Black Trim REFRIGERANT R-410A Control (Cooling) AccuRater Control TXV INDOOR FAN Direct Drive Centrifugal Rpm...Cfm High 900…480 1050…550 1275...840 1275...840 1435...11
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NOTES: 1. Dimensions in [ ] are in millimeters. 2. Direction of airflow. 3. Standard unit clearances are as follows: �0 ″ on top and rear �3 ″ on left side �12 ″ on right side �36 ″ on bottom (When facing unit discharge.) WEIGHT (lb) A B E F G UNIT SIZE Cooling Only Heat Pump ft-in. mm ft-in. mm ft-in. mm ft-in. mm ft-in. mm 15 5 5 024 108 110 4- 2 / 1294 3-10 1169 4- 1 / 1260 — — 1- 9 / 549 16 8 8 13 7 1 1 036 117 119 4-10 / 1493 4- 5 / 1368 4- 9 / 1459 — — 2- 1 / 648 16 8 2 2 9 5 1 7 1 048 149
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Fig. 4 — Fan Coil Unit Clearances 5. Run refrigerant piping as directly as possible and avoid any unnecessary turns or bends. 6. Condensate piping can be directed through the inside wall to an approved drain or straight outside. NOTE: The piping hole for condensate line must slope at a 1 minimum pitch of / in. per foot to ensure proper drainage. If 4 proper pitch cannot be achieved, install accessory condensate pump at this time. Step 3 — Mount Unit — Refer to Fig. 4 for clearances and dimensio
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TO INSTALL THERMOSTAT: 3 If there is at least / in. of space between the back of indoor 8 unit and wall: 1. Route thermostat wires (field-supplied) through slot in right side or rear panel of indoor unit (Fig. 3). 2. Route wires over refrigerant and drain piping as shown in Fig. 12. IMPORTANT: Do not route wires under the piping, or wires could impede air filter removal. Fig. 6 — Installing Hex-Head Mounting Bolts in Fan Coil Unit Step 4 — Connect Refrigerant Piping — Fan coil units may be conne
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f. Refer to the outdoor unit Installation, Start-Up and 2. To ensure regular flow of condensate water, the drain Service Instructions for additional information. pipe should be pitched toward an open drain or sump 1 g. Install a factory-supplied filter drier near the out- at a downward slope of at least / -in. per ft. 4 door unit. On heat pump systems, a bi-flow filter 3. Attach plate with screws under piping hole. drier must be used. 4. Attach drain pipe with nylon wire tie passing through 3. I
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Fig. 10 — Mounting Hanging Brackets NOTE: Teflon Seal must face toward the outdoor heat pump unit. Fig. 13 — AccuRater Metering Device at Service Valve (Bypass Type Components), Fig. 11 — Hanging Fan Coil Unit Heat Pump Systems Only *Field-supplied. Fig. 12 — Routing Wires Over Piping 9
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outdoor unit if disconnect can be locked; check local code Step 6 — Make Electrical Connections — Be sure before installing in this manner. field wiring complies with local building codes and NEC, and unit voltage is within limits shown in Table 5. 1. Route ground and power wires. Contact local power company for correction of improper line voltage. According to NEC and most local codes, the unit must have an uninterrupted, unbroken ground to minimize personal To avoid personal injury or damage t
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LEGEND NOTES: 1. All piping must follow standard refrigerant piping techniques. φ — Phase 2. All wiring must comply with the applicable local and national codes. NEC — National Electrical Code 3. Liquid line need not be insulated (cooling only units). Piping 4. Wiring and piping shown are general points-of-connection guides Line Voltage only and are not intended for a specific installation. 24 V 5. Insulate condensate line if run above a conditioned space. Thermistor 7. Metering device is provid
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Step 7 — Install Thermostat — These systems use a 3-speed thermostat. The thermostat monitors the system opera- tion and controls the operating mode. To change settings or re- fer to the thermostat Operating Instructions. Mount thermostat to a wall in the occupied space using 2 field-supplied screws. Locate the thermostat in an area that is not subjected to drafts or direct sunlight through windows. Locate thermostat on an interior wall whenever possible. Figure 18 shows available thermostats. L
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Route 2 wires of field-supplied 18-gage AWG (American Wire Gage) thermostat cable between the low-voltage terminal Step 8 — Make Connections Between Indoor block of the fan coil unit and the blue and brown low-voltage and Outdoor Units — The thermostat is wired between wires in the outdoor unit low voltage terminal block. Connect the indoor and outdoor units to make the system complete. the wires Y1 to Y and C to C. See Fig. 19. CHECK ACCURATER METERING DEVICE — The cor- HEAT PUMP SYSTEMS — The
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COOL AUTO HEAT FLAT THERMOSTAT (FLATSTAT) SLIMLINE THERMOSTAT CARRIER CARRIER COOLING ONLY HEAT PUMP HEAT & COOL COOLING ONLY (53DFS250-FS) HEAT & COOL (53DFS250-SL) COOL AUTO HEAT 5-1-1 PROGRAMMABLE THERMOSTAT CARRIER COOLING ONLY HEAT & COOL (53DFST2-NP) Fig. 18 — Thermostats 14
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The heat pump unit uses a timed defrost method. The timed Step 8 — Make Connections Between Indoor defrost can be field set for 30, 50, or 90 minutes. The timed de- and Outdoor Units — The thermostat is wired between frost is factory set for 90 minutes. the indoor and outdoor units to make the system complete. CHECK ACCURATER METERING DEVICE — The cor- rect AccuRater (bypass type) refrigerant control is required for system capacity optimization. An AccuRater device (see Fig. 19) is supplied with
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Fig. 20 — Cooling System Wiring Diagram 16
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Fig. 21 — Heat Pump Wiring Diagram 17
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START-UP Operating Sequence — Ceiling-suspended fan coil units have a relay board which controls system operation in re- sponse to a room thermostat. The user may manually select any one of 3 fan speeds for unit operation. Ceiling-suspended sys- tems may be equipped with an accessory power ventilation kit Never operate unit without a filter or with grille removed; and/or condensate pump. damage to the unit or personal injury may result. FAN OPERATION — Fan coils are capable of 3-speed opera-
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SPECIAL OPERATION, HEATING — Outdoor cooling units may be matched with heat pump ceiling-suspended fan coil units to provide supplemental electric heat. All other operation is the same as a cooling-only system, except these units have heating capability as follows: When the room thermostat initiates a call for heating, the electric heater is turned on. The indoor unit fan will start at the same time, if it was not already running. When the heating requirement is satisfied, the room thermo- stat
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Clean Indoor Unit Bottom Panel — If the bottom panel of the unit becomes dirty or smudged, wipe the outside of the panel with a soft dry cloth. Use a mild liquid detergent and wipe off carefully with a dry cloth. Clean Indoor Coil — To clean the coil, remove indoor unit bottom panel and vacuum the coil fins, using care not to bend or damage fins. Clean Outdoor Coil (Outdoor Unit) Some metal parts and sharp fins of outdoor unit coil can cause personal injury during cleaning. Clean coil carefull
