page 20 TC42_B2
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10
20
30
TH
TP
TH
TP
L
O
I
H
F
F
O
N
O
P
I
L
O
T
T
O
LI
P
A
E
I
N
DICATOR
O
N
OFF
GAS SUPPLY
Caution: The gas line should be installed by a qualifi ed
service person in accordance with all building codes. This
section is intended as a guide for qualifi ed technicians
installing this appliance. Consult local and/or national
building codes before proceeding.
A gas supply line access hole is located at the bottom right
side of the Control Box. Gas valve inlet accepts a 3/
8
"
N
.P.T.
fi tting. Correct gas line diameter must be used to assure
proper operation.
The gas control is equipped with a capture screw type pres-
sure test port, therefore it is not necessary to provide an 1/
8
inch
N
.P.T. plugged tapping pressure port for checking gas
pressure immediately upstream of the gas supply connection
to the appliance.
Correct gas pressure requirement:
Natural
Gas Propane
Min. Pressure
5.0" wc
12.5" wc
(For purpose of input adjustment)
Max. Pressure
13.9" wc
13.9" wc
Manifold
Pressure
Maximum
3.8" wc
11.0" wc
Minimum
1.75" wc
5.5" wc
THERMOPILE
OPTIONAL
WALL SWITCH
INLET
PRESSURE
TEST POINT
MANIFOLD
PRESSURE
TEST POINT
PILOT FLAME
ADJUSTMENT
SCREW
* BURNER
ROCKER
SWITCH
OR
OR
GAS VALVE
OPTIONAL WALL SWITCH
OR THERMOSTAT (Canada Only)
Note: Use of a wall thermostat is only permitted in
Canada
.
WARNING: Do not connect 110 - 120 VAC to the gas control
valve or control wiring system of this unit.
Manual Millivolt Valve Only:
N
o electrical connection is re-
quired for the gas system operation. The self-generating pilot
provides current for the remote wall switch or wall thermostat
(not provided).
The installation of a wall switch allows for manual remote
operation of fi replace, and automatic operation with a wall
thermostat. Use a switch or thermostat that is millivolt rated.
Position the wall switch or thermostat so that a minimum length
of wire is used from the switch to the fi replace. Use appropri-
ate wire gauge for length of wire. Connect the wall switch to
the valve as shown in fi gure #26.
Fig # 26
Recommended Thermostat Wire Size
Wire Size
Max. Length
14
ga.
............................ 100 ft.
16
ga.
............................. 60 ft.
18
ga.
............................. 40 ft.
20
ga.
............................. 25 ft.
22
ga.
............................. 18 ft.
OPTIONAL
WALL THERMOSTAT
Canada Only
(GASC.THERMO)
OPTIONAL
REMOTE
CONTROL
MANUAL MILLIVOLT VALVE
* NOTE: ROCKER SWITCH MUST BE IN OFF POSITION WHEN USING OPTIONAL WALL SWITCH OR THERMOTSTAT
