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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 Printed in U.S.A. Form 40QA-7SI Pg 1 706 3-06 Replaces: 40QA-5SI
Book 1 4
Ta b 3 d 2 c
Installation, Start-Up and Service Instructions
CONTENTS
Page
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
• TO MOUNT UNIT
• TO INSTALL THERMOSTAT
Step 4 — Connect Refrigerant Piping. . . . . . . . . . . . . . . .7
Step 5 — Connect Condensate Drain Line. . . . . . . . . . .8
Step 6 — Make Electrical Connections . . . . . . . . . . . . .10
Step 7 — Install Thermostat . . . . . . . . . . . . . . . . . . . . . . . .12
Step 8 — Make Connections Between
Indoor and Outdoor Units . . . . . . . . . . . . . . . . . . . . . . . .15
• CHECK ACCURATOR METERING DEVICE
• COOLING ONLY SYSTEMS
• HEAT PUMP 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
•FAN OPERATION
• COOLING MODE OPERATION
• HEAT PUMP OPERATION
• DEFROST (Heat Pump Only)
• SYSTEM SAFETIES
• SPECIAL OPERATION, HEATING
CLEANING AND MAINTENANCE . . . . . . . . . . . . . . . . 19,20
Lubrication. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .19
Air Filters. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .19
• REMOVE AIR FILTERS
• CLEAN OR REPLACE FILTERS
Clean Indoor Unit Bottom Panel . . . . . . . . . . . . . . . . . . . .20
Clean Indoor Coil. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .20
Clean Outdoor Coil (Outdoor Unit). . . . . . . . . . . . . . . . . .20
Clean Condensate Drains . . . . . . . . . . . . . . . . . . . . . . . . . .20
• CLEAN OR REPLACE DRAIN PAN
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
SAFETY CONSIDERATIONS
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.
INSTALLATION
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.
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.
40QA024-060
Ceiling-Suspended Fan Coil Units
Fig. 1 — Ceiling-Suspended Fan Coil Unit