SMARTVALVE™ SYSTEM CONTROLS
69-1059—01
10
reduce the pilot flow if necessary. The pilot adjustment is
shipped at the full pilot gas flow rate. If pilot adjustment
is necessary, proceed as follows:
1.
Remove pilot adjustment cover screw. See Fig. 4.
2.
Pilot adjustment is shipped at full flow rate. Turn
the inner adjustment screw clockwise if the inlet
pressure is too high. Turn the inner adjustment
screw clockwise to decrease or counterclockwise
to increase pilot flame.
3.
Replace the cover screw after the adjustment to
prevent gas leakage.
Fig. 11. Proper flame adjustment.
Check and Adjust Gas Input and
Burner Ignition
CAUTION
1. Do not exceed input rating stamped on
appliance nameplate, or manufacturer’s
recommended burner orifice pressure for size
orifice(s) used. Make certain primary air supply
to main burner is properly adjusted for
complete combustion. Follow instructions of
appliance manufacturer.
2. IF CHECKING GAS INPUT BY CLOCKING GAS
METER: Make certain there is no gas flow
through the meter other than to the appliance
being checked. Other appliances must remain
off with the pilots extinguished (or that
consumption must be deducted from the meter
reading). Convert flow rate to Btuh as
described in form 70-2602, Gas Controls
Handbook, and compare to Btuh input rating
on appliance nameplate.
3. IF CHECKING GAS INPUT WITH MANOM-ETER:
Make sure the ignition system control is in the
OFF position before removing outlet pressure
tap plug to connect manometer (pressure
gauge). Also move the ignition system control
switch to the OFF position when removing the
gauge and replacing the plug. Before removing
inlet pressure tap plug, shut off gas supply at
the manual valve in the gas piping to the
appliance or, for LP, at the tank. Also shut off
gas supply before disconnecting manometer
and replacing plug. Repeat Gas Leak Test at
plug with main burner operating.
NOTE:
Check the inlet pressure before adjusting the
pressure regulator.
1.
Carefully check the main burner lightoff. Make sure
that the main burner lights smoothly and that all
ports remain lit.
2.
Check the full rate manifold pressure listed on the
appliance nameplate. Ignition system control full
rate outlet pressure should match this rating.
3.
With main burner operating, check the ignition sys-
tem control flow rate using the meter clocking
method or check pressure using a manometer con-
nected to the outlet pressure tap on the ignition
system control. See Fig. 4.
4.
If necessary, adjust the pressure regulator to
match the appliance rating. See Tables 7 and 8 for
factory-set nominal outlet pressure and adjust-
ment range.
a. Remove the pressure regulator adjustment cap
screw.
b. Using a screwdriver, turn the inner adjustment
screw clockwise to increase or counterclock-
wise to decrease the gas pressure to the
burner.
c. Always replace the cap screw and tighten
firmly to prevent gas leakage.
5.
If the desired outlet pressure or flow rate cannot be
achieved by adjusting the ignition system control,
check the ignition system control inlet pressure
using a manometer at the ignition system control
inlet pressure tap. If the inlet pressure is in the
nominal range (see Tables 7 and 8), replace the
ignition system control. Otherwise, take the neces-
sary steps to provide proper gas pressure to the
control.
PROPER FLAME
ADJUSTMENT
HOT SURFACE
IGNITER
FLAME ROD
M3350A
GROUND
ELECTRODE
3/8 TO 1/2 IN.
(10 TO 13 MM)
NOTE: GROUND ELECTRODE MUST NOT TOUCH FLAME
ROD (.050 IN. MINIMUM CLEARANCE). BEND GROUND
ELECTRODE IF NECESSARY. DO NOT BEND FLAME ROD.