PITCO VF SERIES INSTALLATION & OPERATIONAL MANUAL
L20-418 Rev 2 (5/16)
13
PILOT FLAME ADJUSTMENT
Perform this procedure with the pilot lit.
Note: This procedure requires a DC millivolt meter set to a scale of 0-1000 mV. Using test leads
with sharp probes will help in taking the required readings. Using test leads with sharp probes
will help in taking the required readings
1.
Locate the thermopile wires coming from the pilot to the
gas control valve.
2.
Connect the positive (+) test probe to the terminal with the
red wire. Then connect the negative (-) test probe to the
terminal with the white wire.
3.
Adjust the current reading to the required level by
adjusting the pilot flame. Remove the pilot adjustment cap
screw to expose the pilot adjustment screw. Turning the pilot
adjustment screw clockwise will decrease the size of the pilot
flame and flame sense current. Turning the pilot adjustment
screw counterclockwise will increase the pilot flame size and
the flame sense current.
4.
Turn the screw in or out as needed to achieve a reading
of 550 mV ± 50 mV.
Note: Allow 3 to 5 minutes between flame adjustments to
allow the reading to stabilize.
Once the pilot flame has been adjusted properly, remove
the millivolt meter and replace the pilot adjustment cap
screw.
BURNER SYSTEM ADJUSTMENT
For the burners to operate the gas control valve must be open and
the thermostat must be turned ON. The burners receive gas from
the main gas supply through the thermostatically controlled gas
control valve. When the oil temperature drops below the preset
temperature the gas control valve opens.
The burners must be adjusted to deliver optimum flame. Refer to the following procedure to adjust the
burners.
1. Ensure that the gas control valve is shut OFF, remove the burner
pressure tap plug and connect an accurate pressure gauge (range of
0-16 “W.C. (39.85mbar, 3.98kPa) in 0.1” (.25mbar, .02kPa)
increments) or manometer.
2. Turn on this and all appliances connected to the gas supply line and
light their burners. The pressure reading of the installed pressure
gauge should not drop from the required installation pressure. Any
loss of pressure indicates inadequate supply line installation, which
will cause poor performance of all appliances during peak usage.
3. The installed pressure gauge should be the same, ±0.1” W.C.
(.25mbar, .02kPa), as that marked on the data plate on the inside
door of the appliance. If the pressure is correct, go to step 6, if it is
not, adjust the pressure as outlined in step 4. To adjust the pressure,
remove the pressure regulator cap screw and, with a flat head
screwdriver, adjust the regulator screw until the proper burner
pressure is reached. Turning the screw clockwise will increase the
burner pressure. Turning the screw counterclockwise will decrease
the burner pressure. When the pressure is correct, replace the pressure regulator cap screw.
IF the pressure cannot be set to within these limits of the pressure stated on the data plate,
DO NOT operate the appliance. Contact an Authorized Service Company.
4. Turn off ALL appliances, turn OFF the gas control valve on your Pitco appliance and remove the
pressure gauge. Apply pipe joint compound to the burner pressure tap plug and reinstall it.
5. Check for leaks at the burner pressure tap.
Gas Control Valve / Millivolt
1. Pressure Regulator Cap
Screw
2. Pilot Adjustment Cap Screw
Burner Pressure Tap
Gas Control Valve / Millivolt
1. Pressure Regulator Cap
Screw
2. Pilot Adjustment Cap Screw
