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Thermostat and subbase — Attractive wall-mounted
24-v accessory provides precise temperature control.
Automatic and Manual changeover models available. A
thermostat subbase is available that works with Cycle-
LOC™ circuitry. If a safety device trips, compressor locks
out and subbase warning light (LK OUT) alerts occupant.
Three models available: One stage cool/two stage heat;
two stage cool/two stage heat; one stage cool/one stage
heat.
Time Guard® II circuit (standard on single-phase
units) — Time Guard II device prevents short cycling of
compressor if thermostat is rapidly changed; automatically
prevents compressor from restarting for 5 minutes after
shutdown.
Electric heaters — A wide range of models is available
from 5 to 30 kW, 208-, 240- and 480-v, single- and 3-ph
units. The heaters mount easily on 50AH discharge open-
ing. The heater control box is accessible from the bottom
of heater.
Condensate pump — The condensate pump is used
when the distance and slope to the nearest drain is far
enough to prevent the natural drainage of unit. The pump
is mounted remotely from the unit and includes a signal
light (field-installed) which illuminates when the reservoir
rises beyond a certain level. The unit automatically shuts
down when this reservoir level is achieved.
Head pressure control damper — This accessory is
duct mounted and allows unit to mechanically cool down to
0° F.
Damper dimensions fit 024, 036 sizes.
NOTE: For use with 048 and 060 size units, ductwork
from unit to damper must be reduced in size to fit damper
dimensions.
Vibration isolators — Package of four isolators used for
dampening any unit vibration so that vibrating sounds are
not transmitted to building structure. Isolators are spring,
ceiling type.
Field-installed accessories
88EN ELECTRIC HEAT MODULE
ACCESSORY
DIMENSIONS (in.)
UNIT
50AH
ABCD
DUCT
OPENING
024,036 13
1
/
2
16 2
1
/
2
8
1
/
2
7
1
/
8
x14
048,060 24 21
3
/
4
3197
1
/
8
x20
7
/
8
HEAD PRESSURE CONTROL DAMPER (in.)