Install Instructions

39
6. Turn OFF any unnecessary gas appliances stated in step
three.
GAS MANIFOLD PRESSURE MEASUREMENT AND ADJUSTMENT
T O PREVENT UNRELIABLE OPERATION OR EQUIPMENT DAMAGE , THE
GAS MANIFOLD PRESSURE MUST BE AS SPECIFIED ON THE UNIT RATING
PLATE . O NLY MINOR ADJUSTMENTS SHOULD BE MADE BY ADJUSTING
THE GAS VALVE PRESSURE REGULATOR .
CAUTION
Only small variations in gas pressure should be made by ad-
justing the gas valve pressure regulator. The manifold pres-
sure must be measured with the burners operating. To mea-
sure and adjust the manifold pressure, use the following pro-
cedure.
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.
NOTE: Follow this procedure to test the gas valve pressure
at 100% firing rate.
Run High Fire
NOTE: the Cool Cloud phone application be used to assist
with all functional tests. See the quick start guide section
for details.
The furnace should be inspected by a qualified installer,
or service agency at least once per year. This check should
be performed at the beginning of the heating season. This
will ensure that all furnace components are in proper work-
ing order and that the heating system functions appropri-
ately. Pay particular attention to the following items. Repair
or service as necessary.
Measuring Inlet Gas Pressure (Alt. Method)
Figure 63
NOTE: When converting from natural gas to L.P. consult
your distributor for proper conversion kit.
Range Nominal
Low Stage 1.6 - 2.2" w.c. 1.9" w.c.
High Stage 3.2 - 3.8" w.c. 3.5" w.c.
Low Stage 5.7 - 6.3" w.c. 6.0" w.c.
High Stage 9.7 - 10.3" w.c. 10.0" w.c.
Ma n i fol d Ga s P r e ssu r e
Gas
Natural
Propane
GAS INPUT RATE MEASUREMENT (NATURAL GAS ONLY)
The actual gas input rate to the furnace must never be greater
than that specified on the unit rating plate. To measure natu-
ral gas input using the gas meter, use the following proce-
dure.
1. Turn OFF the gas supply to all other gas-burning
appliances except the furnace.
2. While the furnace is operating at high fire rate, time
and record one complete revolution of the gas meter
dial, measuring the smallest quantity, usually the
dial that indicates 1/2 cu. ft. per revolution. You
will use this number to calculate the quantity of
gas in cubic ft. if the furnace would consume if it
ran steadily for one hour (3600 seconds).
3. If the 1/2 cu. ft. dial was used, multiply your number
by two. EXAMPLE: If it takes23 seconds to complete
one revolution of the 1/2 ft. dial (23 x 2 = 46).