SIERRA
F
RYERS
S
ERVICE
WWW.MVPGROUPCORP.COM
17
S
E
R
V
IC
E
CHECKING AND ADJUSTING PRESSURE REGULATOR
The combination gas valve (includes pressure regulator) is factory set at 4" W.C. for natural gas and 10"
W.C. for propane gas. To check the manifold pressure, do the following:
1. Tu
rn thermostat “OFF” and combination gas valve knob to the “PILOT” setting.
2. Remove pressure tap plug from burner manifold located directly below the burners in the
cabinet.
3. Install a fitting appropriate to connect a manometer.
4. Turn combination gas valve to
“ON” position and thermostat to “ON.” The burners will ignite. Be
certain that sufficient oil is covering the tubes.
5. With burners on, read manometer.
6. If the manometer does not read 4" W.C. for natural gas, or 10" W.C. for propane gas, adjust
regulator.
7. Remove regulator adjustment screw cap (see diagram on page 15).
8.
With small screwdriver rotate adjustment screw “CLOCKWISE” to increase or
“COUNTERCLOCKWISE” to decrease pressure. Be sure to adjust with burners “ON.”
9.
Turn thermostat “OFF” and set combination gas valve knob to “PILOT” position.
10. Remove manometer and replace pressure tap plug.
11. Replace adjustment screw cap.
CHECKING AND ADJUSTING CALIBRATION OF THERMOSTAT
All thermostat controls are carefully calibrated at the factory (i.e., the dial is properly set to control appliance
temperatures accurately). Only a qualified appliance service technician should perform this adjustment.
1. To check appliance temperatures, use a thermocouple-type temperature test instrument or
reliable thermometer. Place the thermocouple of test instrument or thermometer in the center of
the frypot.
2. Turn the control dial to the temperature setting requiring the greatest accuracy. Allow enough
time for temperature to stabilize, or until several temperature readings are identical.
3. Recalibrate if setting and actual temperature differ by more than 10
F.
4.
Remove dial from dial shaft “B.” Be careful
that dial shaft does not rotate in either
direction (which would change the dial
setting).
5.
Hold dial shaft “B” steady and with a
screwdriver tur
n calibration screw “A”
clockwise to decrease the temperature, or
counterclockwise
to
increase
the
temperature.
6. Replace dial. Let the appliance operate
until the temperature has stabilized before
a final check is made to determine whether
or not the calibration has been corrected.
7. Once correct, seal the calibration screw
with glyptol.
