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Cancels: II 619C-24-3 II 619C-24-4
4/15/06
CONTENTS
Page
SAFETY CONSIDERATIONS . . . . . . . . . . . . . . . . . . . . . . . . . 1
INSTALLATION. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-17
I. Step 1 — Complete Pre-Installation
Checks . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
II. Step 2 — Select Location . . . . . . . . . . . . . . . . . . . . . 4
III. Step 3 — Mount Unit . . . . . . . . . . . . . . . . . . . . . . . . . 6
IV. Step 4 — Connect Refrigerant Piping . . . . . . . . . . . 7
V. Step 5 — Connect Condensate Drain Line . . . . . . . 8
VI. Step 6 — Make Electrical Connections . . . . . . . . . 10
VII. Step 7 — Install Thermostat . . . . . . . . . . . . . . . . . . 12
VIII. Step 8 — Make Connections Between
Indoor and Outdoor Units. . . . . . . . . . . . . . . . . . . . 15
START-UP . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .18,19
I. After Extended Shutdown. . . . . . . . . . . . . . . . . . . . 18
II. Seasonal Changeovers . . . . . . . . . . . . . . . . . . . . . . 18
III. Adjusting Airflow. . . . . . . . . . . . . . . . . . . . . . . . . . . 18
IV. Operating Mode Memory. . . . . . . . . . . . . . . . . . . . . 18
V. Automatic Operation (Auto.) Mode. . . . . . . . . . . . . 18
VI. Operating Sequence . . . . . . . . . . . . . . . . . . . . . . . . 18
CLEANING AND MAINTENANCE . . . . . . . . . . . . . . . . . .19,20
I. Lubrication . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
II. Air Filters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
III. Clean Indoor Unit Bottom Panel. . . . . . . . . . . . . . . 20
IV. Clean Indoor Coil. . . . . . . . . . . . . . . . . . . . . . . . . . . 20
V. Clean Outdoor Coil (Outdoor Unit). . . . . . . . . . . . . 20
VI. Clean Condensate Drains . . . . . . . . . . . . . . . . . . . . 20
SERVICE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
I. Before Calling for Service. . . . . . . . . . . . . . . . . . . . 20
FRESH AIR INSTALLATION OPTION . . . . . . . . . . . . . . . . . 20
I. Ventilation-Air Accessory . . . . . . . . . . . . . . . . . . . . 20
TROUBLESHOOTING. . . . . . . . . . . . . . . . . . . . . . . . . . . .20,21
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 instal-
lation of the complete system. Note that the outdoor units are
shipped with installation and service instructions for basic
installation of the outdoor section. Be sure to make the con-
nections in Cooling Only Systems and Heat Pump Systems
sections on page 15 of this literature so that the unit will
operate properly.
Refer to Table 1 for proper system matches.
WARNING: Before installing or servicing system,
always turn off main power to system. There may be
more than one disconnect switch. Turn off accessory
heater power if applicable. Electrical shock can cause
personal injury.
Installation, start-up and
service instructions
CEILING-SUSPENDED
FAN COIL UNITS
619CNF
619CNQ
Sizes 024-060
Fig. 1 — Ceiling-Suspended Fan Coil Unit
a40-267