Product data

FAN COIL UNITS
CONDITION 40QN 40QA 40QK 40CG 40CS 40HD
Maximum Room Temperature (F) 84 84 95
Minimum Room Temperature (F) 64 64 55
Maximum Return Air (F)
Dry-Bulb 85 85 85
Wet-Bulb 72 72 72
Minimum Return Air (F) Heat Pump 28 28 28
Maximum Saturated Suction Temperature (F) 55 55 55
Minimum Saturated Suction Temperature (F) 27 27 27
8. Low-ambient operation
Units can operate in cooling down to 55 F under all conditions without a low-ambient kit. Units equipped with accessory
low-ambient kits should also be equipped with wind baffle, isolation relay, and crankcase heater (scroll units). NOTE: Not
available on Console Systems.
Winter Start Kit ---
The use of a winter start control may extend the operating range, generally to 35 F or 40 F, without
the addition of the Low Ambient Kit. Winter Start bypasses the low pressure switch for 3 minutes and is not required on
38AN units. NOTE: Not available on Console Systems.
Freezestat —
Freeze-up protection is provided on all duct-free fan coil units.
Crankcase heater
—
Scroll compressor units with low-ambient control or scroll compressor units in long-line
applications should be equipped with crankcase heaters to prevent refrigerant migration during compressor off cycle.
Heaters are factory installed on Console Heat Pump Systems.
9. Metering devices
38AN/BK units —
The38AN & BK 009 & 012 units have capillary tubes for refrigerant metering (in both cooling and
heating) located in the outdoor unit. These units may only be used with 40QN fan coils of the same size.
38CG,CS,SB, & SC
--- The 38CG,CS,SB, and SC units have capillary tubes for refrigerant metering (in both cooling
and heating) located in the outdoor unit.
38HD, QR & 38BK 018 & 024 units —
These units use a piston-type metering device located in the
indoor unit (for cooling) and in the outdoor liquid service valve (for heating). Pistons function as
check valves in addition to being metering devices.
NOTE:
All duct-free split systems that use Chattleff style AccuRater pistons use Type ‘‘B’’.
DO NOT
mix Type ‘‘A’’
and Type ‘‘B’’ pistons. See Long-Lines Applications Section #15 for changes in piston sizes due to long lines.
10. Drain connections
Install drains to meet local sanitation codes. If adequate gravity drainage cannot be provided, unit should be equipped with
accessory condensate pump.
NOTE:
The 40QK & 40HD units have a condensate pump installed as standard from the factory. High wall fan coil
units may use either standard or high lift condensate pumps. High lift pumps have a 10 ft lift, and standard high wall and
all other fan coil unit condensate pumps have a lift capability of 20 in. lift above the condensate pan level. See base unit
dimensional drawings Section#17 for drain locations and sizes.
NOTE:
High wall fan coil units have internal condensate traps. All other fan coil units require a field supplied external
condensate trap. Drain connections may be routed through alternate locations on most fan coils. See base unit
dimensional drawings Section #17 for possible alternate locations.
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