Table of Contents
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CONTENTS
SAFETY CONSIDERATIONS . . . . . . . . . . . . . . . . . . . . . . . . .1
INSTALLATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-17
Step 1 - Complete Pre-Installation
Checks . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3
• UNPACK UNIT
• INSPECT SHIPMENT
• BEFORE INSTALLATION
Step 2 - Select Location . . . . . . . . . . . . . . . . . . . . . . . . . . . .4
Step 3 - Mount Unit. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6
• WOODEN STRUCTURE
• NEWLY BUILT CONCRETE SLAB
• METAL STRUCTURE
• PREVIOUSLY BUILT CONCRETE SLAB
Step 4 - Connect Refrigerant Piping. . . . . . . . . . . . . . . .7
Step 5 - Connect Condensate Drain Line . . . . . . . . . . .8
Step 6 - Make Electrical Connections . . . . . . . . . . . . .10
Step 7 - Install Thermostat . . . . . . . . . . . . . . . . . . . . . . . .12
Indoor and Outdoor Units . . . . . . . . . . . . . . . . . . . . . . . .15
• CHECK ACCURATOR METERING DEVICE
• COOLING ONLY SYSTEMS
START-UP . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18,19
After Extended Shutdown . . . . . . . . . . . . . . . . . . . . . . . . . .18
Seasonal Changeovers . . . . . . . . . . . . . . . . . . . . . . . . . . . . .18
Adjusting Airflow . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .18
Operating Mode Memory . . . . . . . . . . . . . . . . . . . . . . . . . . .18
Automatic Operation (Auto.) Mode. . . . . . . . . . . . . . . . . .18
Operating Sequence. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .18
• SPECIAL OPERATION, HEATING
CLEANING AND MAINTENANCE . . . . . . . . . . . . . . . . 19,20
Lubrication . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .19
Air Filters. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .19
• REMOVE AIR FILTERS
Clean Indoor Unit Bottom Panel . . . . . . . . . . . . . . . . . . . .20
Clean Indoor Coil . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .20
Clean Outdoor Coil (Outdoor Unit). . . . . . . . . . . . . . . . . .20
Clean Condensate Drains . . . . . . . . . . . . . . . . . . . . . . . . . .20
SERVICE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .20
Before Calling for Service . . . . . . . . . . . . . . . . . . . . . . . . . .20
• IF SYSTEM FAILS TO OPERATE
FRESH AIR INSTALLATION OPTION . . . . . . . . . . . . . . . .20
Ventilation-Air Accessory . . . . . . . . . . . . . . . . . . . . . . . . . .20
TROUBLESHOOTING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .20
START-UP CHECKLIST . . . . . . . . . . . . . . . . . . . . . .CL1, CL-2
Manufacturer reserves the right to discontinue, or change at any time, specifications or designs without notice and without incurring obligations.
Catalog No. 02-40QA0007-SI
Book 1 4
Tab 3d 2c
Ceiling-Suspended Fan Coil Units
Page
Installing and servicing air-conditioning equipment can be
hazardous due to system pressure and electrical components.
Only trained and qualified service personnel should install or
service air-conditioning equipment.
Untrained personnel can perform basic maintenance, such
as cleaning and replacing filters. All other operations should be
performed by trained service personnel. When working on air-
conditioning equipment, observe precautions in literature and
on tags and labels attached to unit.
Follow all safety codes. Wear safety glasses and work
gloves. Use quenching cloth for brazing operations. Have fire
extinguisher available. Read these instructions thoroughly.
Consult local building codes and National Electrical Code
(NEC) for special installation requirements.
Before installing or servicing system, always turn off
main power to system. There may be more than one dis-
connect switch. Turn off accessory heater power if appli-
cable. Electrical shock can cause personal injury.
Installation instructions for fan coil units (Fig. 1) are con-
tained in this manual. Refer to this manual for proper installa-
tion of the complete system. Note that the outdoor units are
shipped with installation and service instructions for basic in-
stallation of the outdoor section. Be sure to make the connec-
tions in Cooling Only Systems and Heat Pump Systems sec-
tions on page 15 of this literature so that the unit will operate
properly.
Refer to Table 1 for proper system matches.
Fig. 1 - Ceiling-Suspended Fan Coil Unit
Printed in U.S.A.
Form 40QA-7SI
40QA024-060
SAFETY CONSIDERATIONS
INSTALLATION
Pg 1
706
3-06
Replaces: 40QA-5SI
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Summary of Contents for Carrier 40QA024-060
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Page 1: Table Of Contents
15 of this literature so that the unit will operate properly. Refer to Table 1 for proper system matches. Fig. 1 — Ceiling-Suspended Fan Coil Unit Printed in U.S.A. Form 40QA-7SI 40QA024-060 INSTALLATION Pg 1 3-06 Replaces: 40QA-5SI... - Page 2 SYSTEM TYPE Cooling Only Heat Pumps Heating/Cooling *Units must be field reconfigured for 1 ton (18,000 Btuh) operation. See Before Installation sec- tion on page 3 for details. NOTE: Numbers in ( ) indicate quantities when there is more than one fan coil unit in the system. Ensure unit operation within the application guidelines shown in Table 2.
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Page 3: Installation
Table 3A — Physical Data, Under Ceiling Cooling Only Units SYSTEM SIZE NOMINAL CAPACITY (tons) NOMINAL SIZE (Btuh) OPERATING WEIGHT (lb) MOISTURE REMOVAL WEIGHT (Pints/Hr) FINISH REFRIGERANT Control (Cooling) INDOOR FAN Rpm...Cfm High 862...500 Rpm...Cfm Medium 690...400 Rpm...Cfm Low 552...320 High Speed Watts Motor Quantity Blowers —... -
Page 4: Step 2 - Select Location
Table 3B — Physical Data, Under Ceiling Heat Pump Units UNIT SIZE NOMINAL CAPACITY (tons) NOMINAL SIZE (Btuh) OPERATING WEIGHT (lb) MOISTURE REMOVAL WEIGHT (Pints/Hr) FINISH REFRIGERANT Control (Cooling) INDOOR FAN Rpm...Cfm High 900…480 Rpm...Cfm Medium Rpm...Cfm Low High Speed Watts Motor Quantity Blowers —... - Page 5 WEIGHT (lb) UNIT SIZE Cooling Only Heat Pump ft-in. 4- 2 4-10 5-11 7- 8 Fig. 3 — Base Unit Dimensions NOTES: 1. Dimensions in [ ] are in millimeters. 2. Direction of airflow. 3. Standard unit clearances are as follows: •...
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Page 6: Step 3 - Mount Unit
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 minimum pitch of in. -
Page 7: To Install Thermostat
Fig. 6 — Installing Hex-Head Mounting Bolts in Fan Coil Unit DIMENSIONS (in.) UNIT SIZE Fig. 7 — Fan Coil Unit Hanging Dimensions DIMENSIONS (in.) UNIT SIZE *Exposed mounting holes. †Reverse bracket holes (concealed mounting). Fig. 8 — Mounting Included with Fan Coil Unit Fig. -
Page 8: Step 5 - Connect Condensate Drain Line
f. Refer to the outdoor unit Installation, Start-Up and Service Instructions for additional information. g. Install a factory-supplied filter drier near the out- door unit. On heat pump systems, a bi-flow filter drier must be used. 3. Insulate and caulk wall openings to reduce air infiltra- tion and refrigerant pipe vibrations on structure. - Page 9 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.
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Page 10: Step 6 - Make Electrical Connections
Step 6 — Make Electrical Connections — field wiring complies with local building codes and NEC, and unit voltage is within limits shown in Table 5. Contact local power company for correction of improper line voltage. To avoid personal injury or damage to unit, do not make electrical connections until all power sources are shut down, locked out, and tagged off. - Page 11 LEGEND φ — Phase NEC — National Electrical Code Piping Line Voltage 24 V Thermistor *Standard. †Accessory item. **Field supplied. ††Insulate for heat pump application. Fig. 14 — Component Location (Typical Ceiling-Suspended System) NOTES: 1. All piping must follow standard refrigerant piping techniques. 2.
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Page 12: Step 7 - Install Thermostat
These systems use a Step 7 — Install Thermostat — 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. -
Page 13: Step 8 - Make Connections Between
Step 8 — Make Connections Between Indoor The thermostat is wired between and Outdoor Units — 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. - Page 14 FLAT THERMOSTAT (FLATSTAT) CARRIER COOLING ONLY HEAT & COOL (53DFS250-FS) 5-1-1 PROGRAMMABLE THERMOSTAT Fig. 18 — Thermostats AUTO SLIMLINE THERMOSTAT CARRIER HEAT PUMP COOLING ONLY HEAT & COOL (53DFS250-SL) COOL AUTO HEAT CARRIER COOLING ONLY HEAT & COOL (53DFST2-NP) COOL...
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Page 15: Indoor And Outdoor Units
Step 8 — Make Connections Between Indoor The thermostat is wired between and Outdoor Units — 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. - Page 16 Fig. 20 — Cooling System Wiring Diagram...
- Page 17 Fig. 21 — Heat Pump Wiring Diagram...
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Page 18: Start-Up
START-UP Never operate unit without a filter or with grille removed; damage to the unit or personal injury may result. Make the following checks and complete the Start-Up Checklist on page CL-1 before system start-up. Also refer to the condensing unit Installation, Start-Up and Service Instruc- tions for system start-up instructions and refrigerant charging methods. -
Page 19: Cleaning And Maintenance
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. -
Page 20: Clean Indoor Unit Bottom Panel
Clean Indoor Unit 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. - Page 21 PROBLEM System Does Not Start. Blown fuse or circuit breaker tripped at building power entry. Indoor and/or outdoor unit disconnect switch is off. Thermostat is set to night mode. Power failure. Unit is in off mode. Three-minute time delay is running. Temperature is above or below the selected temperature.
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Page 22: Start-Up Checklist
Course descriptions and schedules are in our catalog. [ ] Packaged Service Training Copyright 2006 Carrier Corporation Manufacturer reserves the right to discontinue, or change at any time, specifications or designs without notice and without incurring obligations. Catalog No. 02-40QA0007-SI... - Page 23 *FIELD PIPING AND ALL TUBING CONNECTIONS MUST BE LEAK TESTED BY THE PRESSURE METHOD DE- SCRIBED IN CARRIER GENERAL TRAINING FOR AIR CONDITIONING MANUAL (GTAC2), MODULE 5. USE R-22 AT APPROXIMATELY 25 PSIG BACKED UP WITH AN INERT GAS TO REACH A TOTAL SYSTEM PRESSURE NOT TO EXCEED 245 PSIG.
- Page 24 STALLED IN SIGHT FROM THE UNIT? IS THE LOW-VOLTAGE CABLE (INDOOR TO OUTDOOR UNIT) RUN AND CONNECTED PROPERLY? Copyright 2006 Carrier Corporation Manufacturer reserves the right to discontinue, or change at any time, specifications or designs without notice and without incurring obligations.