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Installation, start-up and
619CNF
619CNQ
service instructions
Sizes 024-060
CEILING-SUSPENDED
FAN COIL UNITS
Cancels: II 619C-24-3 II 619C-24-4
4/15/06
CONTENTS
performed by trained service personnel. When working on
air-conditioning equipment, observe precautions in literature
Page
and on tags and labels attached to unit.
SAFETY CONSIDERATIONS . . . . . . . . . . . . . . . . . . . . . . . . . 1
Follow all safety codes. Wear safety glasses and work gloves.
INSTALLATION . . . . . . . . . . . . .
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Table 1 — System Matches SYSTEM TYPE INDOOR SECTION NUMBER OUTDOOR SECTION NUMBER 619CNF 538ANR,APR,AER 024* 018 024 024 Cooling Only 036 030 036 036 048 048 060 060 619CNQ 538BNR,BPR,BER 024* 018 024 024 Heat Pumps 036 030 036 036 048 048 060 060 619CNQ 538ANR,APR,AER 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 section on page 3 for details. 2 NOTE: Numbers in ( ) indicate quant
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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 / 23 345 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 / 23345 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...113
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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.) b40-437 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
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a40-929 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. 4 If proper pitch cannot be achieved, install accessory conden- sate pump at this time. III. STEP 3 — MOUNT UNIT Refer to Fig. 4 for clearances
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F. 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 a40-620 could impede air filter removal. Fig. 6 — Installing Hex-Head Mounting Bolts IV. STEP 4 — CONNECT REFRIGERANT PIPING in Fan Coil Unit Fan coil units
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3. Attach plate with screws under piping hole. 3. Insulate and caulk wall openings to reduce air infil- tration and refrigerant pipe vibrations on structure. 4. Attach drain pipe with nylon wire tie passing through hole (Fig. 15). 4. Evacuate piping, if necessary. If either refrigerant piping or the indoor coil is exposed to atmospheric NOTE: Do not fasten nylon wire ties tight enough to conditions, it must be evacuated to 1000 microns to deform the insulation, as this affects its performance. e
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a40-625 Fig. 10 — Mounting Hanging Brackets MOUNTING SLOT a40-531 NOTE: Teflon Seal must face toward the outdoor heat pump unit. HEX-HEAD a40-933 Fig. 13 — AccuRater Metering Device at Service Valve BOLT (Bypass Type Components), Fig. 11 — Hanging Fan Coil Unit Heat Pump Systems Only a40-940 *Factory-supplied. Fig. 12 — Routing Wires Over Piping —9—
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VI. STEP 6 — MAKE ELECTRICAL CONNECTIONS 440-14 of NEC. Some codes allow indoor unit to share discon- nect with outdoor unit if disconnect can be locked; check Be sure field wiring complies with local building codes and local code before installing in this manner. 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. WARNING: According to NEC and most local WARNING: To avoid personal injur
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a40-1635 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
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VII. STEP 7 — INSTALL THERMOSTAT These systems use a 3-speed thermostat. The thermostat monitors the system operation and controls the operating mode. To change settings or refer to the thermostat Operat- ing 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.
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a40-941 LEGEND ASM — Air Sweep Motor NEC — National Electrical Code Terminal Block ASR — Air Sweep Relay PL — Plug EQUIP GND — Equipment Ground TB — Terminal Board Factory Wiring FL — Fuse Link TRAN — Transformer FPT — Freeze Protection Thermostat Field Power Wiring Terminal (Marked) HP — Heat Pump Field Control Wiring HR — Heater Relay Terminal (Unmarked) HTR — Heater Printed Circuit Board Splice HTT — Heater Temp. Thermostat Accessory or Optional Wiring IFM — Indoor-Fan Motor NOTES: 1. If any
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COOL AUTO HEAT a40-1385 a40-1384 SLIMLINE THERMOSTAT FLAT THERMOSTAT (FLATSTAT) HEAT PUMP COOLING ONLY COOLING ONLY HEAT & COOL HEAT & COOL (53DFS250-FS-BRY) (53DFS250-SL-BRY) a40-1386 COOL AUTO HEAT 5-1-1 PROGRAMMABLE THERMOSTAT COOLING ONLY HEAT & COOL (53DFST2-NP-BRY) Fig. 18 — Thermostats —14—
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VIII. STEP 8 — MAKE CONNECTIONS BETWEEN INDOOR to Y, R to R, O to O, W2 to W2, and C to C with the wires. See AND OUTDOOR UNITS Fig. 21. The thermostat is wired between the indoor and outdoor The heat pump unit uses a timed defrost method. The timed units to make the system complete. defrost can be field set for 30, 50, or 90 minutes. The timed defrost is factory set for 90 minutes. A. Check AccuRater Metering Device The correct AccuRater (bypass type) refrigerant control is required for system
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538A 619CNF,CNQ 619CNF,CNQ 538A a40-1636 Fig. 20 — Cooling System Wiring Diagram —16—
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538B 619CNQ 619CNQ 538B a40-1637 Fig. 21 — Heat Pump Wiring Diagram —17—
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START-UP cooling to heating (heat pump system only) depending on the selected temperature. Auto. mode also controls fan speed if not manually overridden. WARNING: Never operate unit without a filter or with grille removed; damage to the unit or personal NOTE: Between the cooling cycle and the heating cycle there injury may result. is a neutral zone of approximately 2° F above and 2° F below the selected temperature when only the fan is operating. Make the following checks and complete the Start
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The DFB logic checks the 10-minute defrost timer and the DFT. If the DFT opens in less than 10 minutes, the DFB switches the unit back to normal heating operation. If the DFT remains closed, the DFB switches the unit back to heating operation after 10 minutes. When the DFB changes back to heating mode, the RVR (reversing valve relay) is deenergized and the reversing valve switches back to heating operation. Both the outdoor and indoor fans come back on, and if necessary, the electric heater also
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III. 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. IV. CLEAN INDOOR COIL To clean the coil, remove indoor unit bottom panel and vac- uum the coil fins, using care not to bend or damage fins. V. CLEAN OUTDOOR COIL (OUTDOOR UNIT) WARNING: Some metal parts and sharp fins of outdoor unit coil can cause personal injury during cleaning.
