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FIELD-INSTALLED ACCESSORIES
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.
Two models available: Two stage cool/two stage heat and 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 compres-
sor from restarting for 5 minutes after shutdown.
Electric Heaters —
A wide range of models available from 5 to
30 kW, 208-, 240- and 480-v, single- and 3-ph units. Mount eas-
ily on 502A discharge opening. Heater control box 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 damp-
ening any unit vibration so that vibrating sounds are not
transmitted to building structure. Isolators are spring, ceiling
type.
88EN ELECTRIC HEAT MODULE
ACCESSORY
DIMENSIONS (in.)
UNIT
502A
ABCD
DUCT
OPENING
024,036
13
1
/
2
16 2
1
/
2
8
1
/
2
7
1
/
8
x 14
048,060
24 21
3
/
4
3197
1
/
8
x 20
7
/
8
HEAD PRESSURE CONTROL DAMPER (in.)