King Electrical Mfg. Co. 9131 10th Ave South, Seattle WA 98108 ph: 206-762-0400 fax: 206-763-7738
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MODEL CK PLENUM INSTALLATION INSTRUCTIONS
TESTED AND APPROVED BY ETL TESTING LABORATORIES No 500505
Control Wiring:
Connect thermostat to terminals R
and W for heating, and to R and G for cool air only.
This can be done with a single stage heat-cool ther-
mostat or a single stage heat only thermostat and a
separate fan only switch to control the fan-relay (op-
tional). Some models have two stage operation (op-
tional) and are provided with terminals W1 and W2.
If a single stage thermostat is used it should be con-
nected to terminals R and W1 and a jumper wire
installed from terminals W1 to W2; see enclosed
control circuit wiring diagram.
The model CK Air Heater plenum installation is a special application heater for use in the space
created between a finished concrete ceiling and a drop type t-bar ceiling, an area normally hidden
from view.
The heater is mounted horizontally with the integral suspension bracket provided in an area where
service access can be readily maintained.
Safety screens are provided at both the air intake and discharge aperture. Fixed air directional louvers
are standard.
A 24 volt control thermostat with a maximum temperature setting of 100º F will prevent operation of
the unit should the ambient rise above 100º F. - the maximum ambient for which the heater is intended
to operate.
CAUTION
: Turn off power source for the heater before attempting installation, maintenance or
repairs. Lock, tape or tag circuit breaker or fuse so that power cannot be turned on by accident.
Failure to do so could result in personal injury or shock.
INSPECT HEATER:
Remove heater from carton and check to be sure blower wheel is free-turning,
and that element assemblies are in place. Be sure filter is in proper position and not torn or dam-
aged.
