Installation / Operation Instruction Manual

page 13
CK-81 CONTROL KIT WIRING FOR MILLIVOLT WATER
HEATER CONTROLS
Remove wiring harness from control kit box.1.
Remove top knockout from the thermostat. Push 2.
the snap bushing supplied over the knockout hole
created to prevent the wires from being chafed.
Insert wire harness through bushing hole in
thermostat top.
Disconnect the white and red leads from the 3.
thermostat terminals. Reconnect the white wire
from the gas valve to terminal #3 (lower left) on
the thermostat. Cut the tongue terminal from the
end of the red wire to the thermostat and strip
1
⁄2" of insulation to expose bare wire. Connect
to bare end of red wire from harness using wire
nut or crimp butt connector to join wires inside
thermostat housing.
Connect the black and yellow 24 volt wires from 4.
the Harness to the two (2) top terminals of
the thermostat.
Run the harness supplied along the water heater 5.
jacket and support with the clamps provided.
Install the GSK-3 spillage switch on the draft 6.
hood with the self-tapping sheet metal screw
supplied. The thermal element disc should hang just below the draft hood relief opening. (See Figure 10)
Run the two (2) red wires from the break in the top of the harness into the spillage switch through the 7.
plastic bushing opening and connect to the switch terminals.
Run the harness to the CK-81 junction box, which will be mounted in a convenient location near the 8.
power venter. Use clamps to support the wire harness to the joists at regular intervals to prevent sagging.
Run the harness wires through the hole with the plastic bushing in the control box and connect the wires 9.
as follows:
Connect the black wire to terminal T1, the yellow wire to T2, the blue wire to T3, and the red wire to
T4. (See Figure 16)
Follow the National Electrical Code and/or applicable local codes for running high voltage wires to the 10.
CK-81 control box and wire according to the diagram. Unit must be grounded. Check ground circuit
to make sure the unit has been properly grounded. Connect the flexible conduit from the blower to the
control box and wire according to the diagram.
Attach the appropriate self-adhesive wiring diagram label to the water heater jacket.11.
GAS VALVE
Figure 15