Gas Valve Details Hi/Lo - Calcana CAL Series Installation, Operation, Service, And Parts Manual

CAL-SERIES

24.2 GAS VALVE DETAILS HI/LO

Check and Adjust Gas input and Burner Ignition
IMPORTANT:
1) Do not exceed input rating stamped on appliance nameplate, or manufacturer recommended burner
orifice pressure for size orifice(s) used.
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 deduct the consumption from the meter reading) Convert flow rate to BTUH and
compare BTUH input rating on appliance nameplate.
3) IF CHECKING GAS INPUT WITH MANOMETER: Make sure the gas control knob or the ignition control
switch is in the OFF position before removing outlet pressure tap plug to connect manometer
(pressure gauge). Also move the gas control knob or the ignition system control switch to the OFF
position when removing the gauge and replacing the plug. Before removing the inlet pressure tap
plug, shut off the gas supply at the manual valve in the gas piping to the appliance or, for Propane,
at the tank. Also shut off the gas supply before disconnecting the manometer and replacing the plug.
Repeat the Gas Leak Test at the plug with the main burner operating.
NOTE: Check the inlet pressure before adjusting the pressure regulation.
Two-stage regulator models require that you check and adjust both high and low pressure regulator
settings. Two-stage appliance operating sequences vary, consult the appliance manufacturer instructions
for the specific operating sequence and regulator adjustment procedures for the appliance in which the
control is installed: The regulator adjustment instruction is as Follows:
1) Turn ON/OFF switch to ON. Set HI/LO switch to HI.
2) Carefully check the main burner light-off. Make sure that the main burner lights smoothly and that
all ports remain lit.
3) Wait for control to move to high pressure (second stage) and then check the full rate manifold
pressure listed on the appliance nameplate for high pressure. The gas control full rate outlet pressure
should match this rating.
4) With main burner operating, check the gas control flow rate using the meter clocking method or
check pressure using a manometer connected to the outlet pressure tap on the control.
5) If necessary, adjust the high pressure regulator to match the appliance rating.
a) Remove the pressure regulator adjustment cap.
b) Using a screwdriver, turn the inner adjustment screw for HI pressure clockwise
increase or counterclockwise
6) After high pressure is checked; check low pressure regulation by setting HI/LO switch to LO.
to decrease the gas pressure to the burner.
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