SERVICING
52
Gas Manifold Pressure Measurement and Adjustment
Natural Gas Adjustments
WARNING
HIGH
VOLTAG
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IS
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ALL
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L
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AND
SHUT
OFF
GAS
SUPPLY
B
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FO
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VI
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INSTALLING
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NOTE:
Use adapter kit #0151K00000S to measure gas
pressure on White-Rodgers 36J54 gas valves.
Only small variations in gas pressure should be made by
adjusting the gas valve pressure regulator. The manifold
pressure must be measured with the burners operating. To
measure and adjust the manifold pressure, use the following
procedure.
1. Turn OFF gas to furnace at the manual gas shutoff valve
external to the furnace.
2. Turn off all electrical power to the system.
3. Outlet pressure tap connections: White-Rodgers 36J54
valve: Back outlet pressure test screw (inlet/outlet
pressure tap) out one turn (counterclockwise, not more
than one turn).
4. Attach a hose and manometer to outlet pressure tap.
5. Turn ON the gas supply.
Follow this procedure to test the gas valve pressure at
100% firing rate.
Run High Fire
It is recommended that the CoolCloud phone application be
used for all functional tests. If a manual test is preferred there
are two methods available.
Method 1 (Temporary Test):
1. Using the on board push button switches, enter the
Gas Pressure Test menu (7 segment display “gPt”) and
select YES to enable the Gas Pressure Test. The system
will operate in high fire for 5 minutes or until the test is
terminated by pressing any of the 3 on board push button
switches.
Method 2 (Longer Term Test):
1. Turn off the furnace
2. If installing a communicating fossil fuel system, make
sure the 1,2,R,C terminal is either removed or there are
no wires connected. If utilizing an accessory module to
control a non-communicating heat pump, disconnect the
RJ12 jack from the furnace.
3. Provide power to the furnace.
4. Provide a thermostat W call. The system will continuously
run at 100% firing rate.
5. When test is complete, remove the W (heat) call to the
furnace. The system will shut down.
Run Low Fire
1. Turn off the furnace
2. If installing a communicating fossil fuel system, make
sure the 1,2,R,C terminal is either removed or there are
no wires connected. If utilizing an accessory module to
control a non-communicating heat pump, disconnect the
RJ12 jack from the furnace.
3. Provide power to the furnace.
4. Provide a thermostat W call and allow furnace to begin
its ignition sequence.
5. Remove thermostat W call and allow furnace to enter idol
state (7 segment display IdL).
6. Provide the thermostat W call again. The furnace will now
operate in low stage for greater than 5 minutes (assuming
the target run time has been set to something greater than
10 minutes).
7. When test is complete, remove the W (heat) call to the
furnace. The system will shut down.
Manometer
Manometer
Hose
High Fire Regulator
Adjust
Regulator
Vent
On/Off Switch
High Fire Coil
Terminal (HI)
Coaxial Coil
Terminal (M)
Common
Terminal(C)
White-Rodgers Model 36J54 Connected to Manometer
3.5
Measuring Manifold Gas Pressure
(36J54 Valve)
WARNING
HIGH
VOLTAG
E
D
IS
C
ONN
EC
T
ALL
E
L
EC
T
R
I
C
AL
POW
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AND
SHUT
OFF
GAS
SUPPLY
B
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FO
RE
S
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VI
C
ING
O
R
INSTALLING
.
Gas
Rate
Range
Nominal
High Stage
3.2 to 3.8" w.c.
3.5" w.c.
Low Stage
1.6 to 2.2" w.c.
1.9" w.c.
Manifold Gas Pressure
Natural Gas
WARNING
HIGH
VOLTAG
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ALL
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GAS
SUPPLY
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VI
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INSTALLING
THIS
UNIT
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WARNING
HIGH
VOLTAG
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SHUT
OFF
GAS
SUPPLY
B
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FO
RE
S
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VI
C
ING
O
R
INSTALLING
.
