GF - D 17
Gas Valves
i. Allow 5 minutes to pass before attempting to adjust
the 100% manifold pressure. This will insure that
the learning routine is complete and that the heat
rise is stable.
j. Read the 100% manifold pressure.
k. If needed, remove the high heat manifold adjustment
cover and adjust to obtain the correct manifold
pressure. See Figure 40.
100% (HIGH) HEAT ADJUSTMENT:
COUNTERCLOCKWISE TO DECREASE MANIFOLD
PRESSURE OR CLOCKWISE TO INCREASE
MANIFOLD PRESSURE.
l. Use Manifold Pressure Settings. See Table 9 for the
correct manifold pressure setting in Inches of Water
Column.
m. Replace and tighten the adjustment cover for the
high heat and read the manifold pressure again. This
procedure may need to be repeated until the correct
manifold pressure is obtained.
NOTE: The adjustment cover over the high heat
must be in place during manifold gas pressure
readings. See Figure 41.
n. If the firing rate cannot be obtained with the manifold
pressures specified in Table 9, the orifices must be
changed. If a change of orifices is required to correct
the furnace input rating, refer to Table 10.
o. Once the 100% manifold pressure has been
adjusted; push the Enter button on the user interface.
This will stop the gas valve setup mode and take
you back to the home screen.
WARNING! EXPLOSION HAZARD REPLACE AND/
OR TIGHTEN ALL PLUGS REMOVED OR
LOOSENED WHEN ADJUSTING GAS PRESSURE
LEAK CHECK THE FITTINGS BEFORE PLACING
INTO REGULAR SERVICE. FAILURE TO FOLLOW
THIS WARNING COULD RESULT IN SERIOUS
PERSONAL INJURY, PROPERTY DAMAGE, OR
DEATH.
p. Remove all field supplied tubing and measurement
devices. Reinstall and tighten all covers and outlet
pressure tap screw.
q. Leak test all gas fittings using a leak detection
solution or soap suds.
r. Turn comfort control to home owners desired
temperature.
Table 9
To Next Page
Loading...
