Gas Manifold Pressurem - Amana CEC96 Series Manual

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 White-Rodgers 36J54
gas valve figure for location of inlet pressure tap.
NOTE: If measuring gas pressure at the drip leg, a field-supplied
hose barb fitting must be installed prior to making the hose
connection. If using the inlet pressure tap on the White-Rodgers
36J54 gas valve, then use the 36G/J Valve Pressure Check Kit,
Part No. 0151K00000S.
3. Turn ON the gas supply and operate the furnace and all
other gas consuming appliances on the same gas supply
line.
4. Measure furnace gas supply pressure with burners firing.
Supply pressure must be within the range specified in the
Inlet Gas Supply Pressure table.
If supply pressure differs from table, make the necessary adjust-
ments to pressure regulator, gas piping size, etc., and/or con-
sult with local gas utility.
5. Turn OFF gas to furnace at the manual shutoff valve and
disconnect manometer. Reinstall plug before turning on
gas to furnace.
6. Turn OFF any unnecessary gas appliances stated in step
3.
G M P M
AS ANIFOLD RESSURE
T
O PREVENT UNRELIABLE OPERATION OR EQUIPMENT DAMAGE
GAS MANIFOLD PRESSURE MUST BE AS SPECIFIED ON THE UNIT RATING
. O
PLATE NLY MINOR ADJUSTMENTS SHOULD BE MADE BY ADJUSTING
THE GAS VALVE PRESSURE REGULATOR
Only small variations in gas pressure should be made by adjust-
ing 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 the outlet pressure tap
(White-Rodgers valve).
5. Turn ON the gas supply.
6. Turn on power and close thermostat "R" and "W1"
contacts to provide a call for low stage heat.
7. Measure the gas manifold pressure with burners firing.
Adjust manifold pressure using the Manifold Gas Pressure
table shown below.
A
EASUREMENT AND DJUSTMENT
CAUTION
.
Natural
Propane
8. Remove regulator cover screw from the low (LO) outlet
pressure regulator adjust tower and turn screw clockwise
to increase pressure or counterclockwise to decrease
pressure. Replace regulator cover screw.
9. Close thermostat "R", "W1" and "W2" contacts to provide
a call for high stage heat.
10. Remove regulator cover screw from the high (HI) outlet
pressure regulator adjust tower and turn screw clockwise
to increase pressure or counterclockwise to decrease
pressure. Replace regulator cover screw.
11. Turn off all electrical power and gas supply to the system.
12. Remove the manometer hose from the hose barb fitting
or outlet pressure tap.
13. Replace outlet pressure tap:
White-Rodgers 36J54 valve: Turn outlet pressure test screw
in to seal pressure port (clockwise, 7 in-lb minimum).
14. Turn on electrical power and gas supply to the system.
15. Close thermostat contacts "R" and "W1/W2" to energize
the valve.
Using a leak detection solution or soap suds, check for leaks at
outlet pressure tap plug (Honeywell valve) or screw (White-Rodgers
valve). Bubbles forming indicate a leak. SHUT OFF GAS AND
,
THE
REPAIR ALL LEAKS IMMEDIATELY!
NOTE: For gas to gas conversion, consult your dealer for
appropriate conversion.
INLET
Gas Valve On/Off
Selector Switch
33
Manifold Gas Pressure
Gas
Range
Low Stage 1.6 - 2.2" w .c.
High Stage 3.2 - 3.8" w .c.
Low Stage 5.7 - 6.3" w .c.
High Stage 9.7 - 10.3" w .c.
White-Rodgers Model 36J54 (Two-Stage)
Figure 39A
Nom inal
1.9" w .c.
3.5" w .c.
6.0" w .c.
10.0" w .c.
OUTLET