34
Figure 49: Gas Control Valve and Optional Thermostat Wiring.
e
LectRicaL
R
equiRements
F
oR
g
as
v
aLve
anD
o
PtionaL
b
LoweR
:
The ENVIRO WESTPORT will operate without electrical power. This model has a millivolt gas control, which
uses the pilot flame to generate enough electricity to operate the main burners. The appliance when equipped
with an optional blower must be electrically connected and grounded in accordance with local codes or in
the absence of local codes, with the current CSA C22.1 CANADIAN ELECTRICAL CODE Part 1, SAFETY
STANDARDS FOR ELECTRICAL INSTALLATIONS, OR THE NATIONAL ELECTRICAL CODE ANSI / NFPA 70 in
the U.S.
Fan
White
Black
Fan
temperature
sensor
White
Black
Fan
controller
Power
Supply
Figure 50: Wiring Diagram For Fan Control.
CAUTION: Label all wires prior to
disconnection when servicing controls.
Wiring errors can cause improper and
dangerous operation. Verify proper
operation after servicing.
T
P
T
H
T
P
T
H
IN
OU
T
N
L
O
IH
T
O
P
L
O
I
F
OF
C
CO
OO
OL
L // H
HE
EA
AT
T
P
PR
RO
OG
GR
RA
AM
M
D
DO
OW
WN
N
U
UP
P
7
70
0 °° F
F
7
70
0 °° F
F
T
O
L
I P
O
O
N
N
O
O
FFFF
Optional
Remote
Control
ON/OFF/Remote
Thermostat Switch
Purple
Thermocouple
Blue
Thermopile
Grey
Inlet
Pressure
Tap
Gas Control
Valve
Manifold
Pressure Tap
Pilot Adjustment
Screw
Optional
Wall Switch
Optional
Thermostat
WARNING: Electrical grounding instructions. This appliance is equipped with a three-prong (grounding)
plug for your protection against shock hazard, and must be plugged directly into a properly grounded three-
prong outlet.
DO NOT cut or remove the grounding prong from this plug.
Initial Installation
QUALIFIED INSTALLERS ONLY
Table 7: Recommended Thermostat Wire Size
Wire Size
Max. Length
14 gauge
100 ft (30.48 m)
16 gauge
60 ft (18.29 m)
18 gauge
40 ft (12.00 m)
20 gauge
25 ft (7.62 m)
22 gauge
18 ft (5.49 m)
