Indoor Ventilation Kit
Indoor Installation Kit • Therma Grow
5
FIG. 4
FIG. 5
Therma Grow ™ 120 Plus or 220 Plus
Heaters
Connect the wiring from the junction box to the heater’s
control box as follows:
a. Black and white wires to wiring labeled TO VENTILA-
TION MOTORS. See Fig 5
-- Use wire nuts provided in the kit.
b. Green ground wire to ground screw.
-- Use the spade terminal from the kit.
Proceed to Section E.
Therma Grow™ 120 or 220 Heaters
1. Disconnect the black motor wire at the ignition control
terminal marked IND. See Fig.6.
FIG. 6
2. Connect the kit’s 8 1/2 in. black wire and the motor
wire to the kit’s three way terminal. See Fig.7. Connect
this assembly to terminal IND on the ignition control.
FIG. 7
3. Connect the wiring from the junction box to the
heater’s control box as follows. Use wire nuts supplied
for a. and b.:
a. Black wire to the stripped end of the black 8 1/2 in.
wire.
b. White wire to the white wire in the control box labeled
TO VENTILATION MOTORS.
c. Green ground wire to the ground screw.
-- Use the spade terminal from the kit. Proceed to
Section E.
E. Wiring the Air Proving Switch at Air Inlet
to the Heater’s Contol Box
1. Disconnect the blue wire from terminal PSI on the igni-
tion control. Remove the terminal from this lead and
strip back its insulation about 1/4 in. See Fig. 8.
FIG. 8
DRILLED PILOT
HOLES
INNER WALL
HOLE PLUG
WIRE CAPS
3 WAY TERMINAL
MOTOR WIRE
8 1/2 IN.
BLACK WIRE
#10 X 1/2
SCREW
