Specifications

ACCESSORIES (FIELD INSTALLED) (cont)
OUTDOOR UNITS
Low-ambient kit includes a solid-state head pressure controller
designed to control condenser fan cycling, and is activated by
a pressure sensor. It is specifically designed to control fan-
motor cycles in response to saturated condensing pressure.
This device maintains a constant saturated condensing tem-
perature of 100F±10Fatoutdoor-air temperatures between
55 F and –20 F, and can be used on all outdoor units without
changing the outdoor-fan motor.
Liquid solenoid valve is an electrically operated shutoff valve
that is installed at the outdoor unit to stop and start refrigerant
flow in response to compressor operation. The valve maintains
a column of refrigerant in the liquid line between compressor
operating cycles and is required for certain long-line applica-
tions and to improve system performance. The valve should be
used with all long-line applications (over 100 ft).
Crankcase heater is available for units with scroll compressors.
Heater clamps onto compressor oil sump. Recommended for
low-ambient applications.
FIELD FABRICATED ACCESSORIES — Field fabricated
accessories including the stacking kit, snow or ice stand, wind
baffles, and wall mount brackets must be constructed in the field
using field-supplied materials.
Stacking rails allow stacking of equally-sized units or permit
smaller units to be stacked on top of larger units. These field
fabricated rails can be used for stacking all size 018 and larger
units.
Snow or ice stands raise the outdoor unit above snow and ice
surfaces to permit normal air circulation, condensate drainage,
and maintenance clearances in areas where prolonged sub-
freezing temperatures or heavy snowfalls occur. The snow rack/
ice stand must be field fabricated and can be used on all
size 018 and larger outdoor units.
Wind baffle is a field fabricated sheet metal wrapper used to
provide improved unit operation during high winds, and is rec-
ommended for size 018 or larger outdoor units whenever the
low-ambient accessory is used.
Wall mount brackets are mounted to the outside of the struc-
ture to raise unit from ground level, or to mount the unit on a wall
adjacent to a sloping roof. Wall mounts are also useful in areas
of heavy snowfall or where space is at a premium. Wall mounts
must be field fabricated and can be used with any size 018 or
larger outdoor unit.
FAN COILS
Indoor guard is a decorative wire guard for the ceiling-
suspended (619C) fan coils. The guard mounts over the fan coil
discharge to prevent objects from entering the unit and air
sweep.
Electronic programable thermostats are available for in-
ceiling cassette (619F) and ceiling-suspended (619C) fan coils.
These commercial-grade thermostats provide 7-day, 4 event-
per-day scheduling. The integral subbase provides 3-speed fan
switchover capability, air sweep, auto changeover, and non-
volatile memory (no battery required).
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