GMVC9 GCVC9 Installation Instructions
35
6. During test mode, if both push buttons are pressed for
greater than 1 second, the display will blank to indicate push
buttons are pressed. If both push buttons are released within
5 seconds, the test mode will terminate and the system will
return to normal operation. Otherwise, the test mode will
continue uninterrupted.
7. After completion of the 5-minute timer or test mode ter-
mination, whichever is earlier, the system will return to nor-
mal operation, either continuing an existing heat demand
or going to the idle state.
White-Rodgers Model 36J54 (Two-Stage)
Figure 46A
Inlet
Pressure
Boss
Low Fire
Regulator
Adjust
M
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t
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r
M
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m
e
t
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r
H
o
s
e
High Fire Regulator
Adjust
Regulator
Vent
Outlet
Pressure Boss
Open to
Atmosphere
O
n
/
O
f
f
S
w
i
t
c
h
H
i
g
h
F
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r
e
C
o
i
l
T
e
r
m
i
n
a
l
(
H
I
)
C
o
a
x
i
a
l
C
o
i
l
T
e
r
m
i
n
a
l
(
M
)
Common
Terminal(C)
White-Rodgers Model 36J54 Connected to Manometer
Figure 46B
Gas Valve On/Off
Selector Switch
Regulator
Vent
Low Fire
Regulator
Adjust
High Fire
Regulator
Adjust
Honeywell Model VR9205 (Two-Stage)
Figure 47A
i
M
a
n
o
m
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t
e
r
M
a
n
o
m
e
t
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r
H
o
s
e
Common
Terminal(C)
High Fire Coil
Terminal (HI)
Low Fire Coil
Terminal (LO)
Inlet Pressure Tap
1/8 NPT
O
p
e
n
t
o
A
t
m
o
s
p
h
e
r
e
Honeywell Model VR9205 Connected to Manometer
Figure 47B
Outlet Pressure Tap
1/8 NPT
Figure 47C
Natural Gas Minimum: 4.5" w.c. Maximum: 10.0" w.c.
Propane Gas Minimum: 11.0" w.c. Maximum: 13.0" w.c.
INLET GAS SUPPLY PRESSURE
CAUTION
T
O
PREVENT
UNRELIABLE
OPERATION
OR
EQUIPMENT
DAMAGE
,
THE
INLET
GAS
SUPPLY
PRESSURE
MUST
BE
AS
SPECIFIED
ON
THE
UNIT
RATING
PLATE
WITH
ALL
OTHER
HOUSEHOLD
GAS
FIRED
APPLIANCES
OPERATING
.
The line pressure supplied to the gas valve must be within the
range specified below. The supply pressure can be measured at
the gas valve inlet pressure tap or at a hose fitting installed in
the gas piping drip leg. The supply pressure must be measured
with the burners operating. To measure the gas supply pressure,
use the following procedure.
1. Turn OFF gas to furnace at the manual gas shutoff valve
external to the furnace.
2. Connect a calibrated water manometer (or appropriate
gas pressure gauge) at either the gas valve inlet pressure
tap or the gas piping drip leg. See Honeywell VR9205 gas
valve figure or White-Rodgers 36J54 gas valve figure for
location of inlet pressure tap.