Vulcan-Hart ECONOFRY EF3 ML-52099, Руководство по обслуживанию

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— 12 — F35641 (02-05)
EF SERIES GAS FRYERS
MILLIVOLT CONTROLS TEST
1. Verify proper gas (natural or propane) is
present.
2. Check for correct wiring and secure
connections.
3. Verify the pilot flame is adjusted properly
as outlined in Pilot Adjustment.
4. If the pilot is not lit, light pilot as outlined
under Lighting Pilot. Allow the pilot to
burn for 3 to 4 minutes to stabilize.
A. If the pilot remains lit, proceed to
step 6.
B. If the pilot will not remain lit, proceed
to step 5.
5. Connect DC voltmeter to terminals
TH-PG and PG of combination valve.
Relight the pilot, hold the gas control
valve knob in and allow the pilot to burn
for 3 to 4 minutes to stabilize.
A. lf the voltage measures 450 millivolts
or greater and the pilot will not stay lit,
replace the combination valve.
B. lf the voltage is less than 450 millivolts,
measure the voltage at terminals NO
and C of high limit.
1) If the voltage is 500 millivolts or
more, replace the high limit.
2) If the voltage is less than 500
millivolts, disconnect the lead wire
from terminal TH-PG of the
combination valve and remeasure
voltage at the high limit.
a. If the voltage is less than 500
millivolts, replace the thermopile.
b. If the voltage is 500 millivolts or
more, replace the combination
valve.
6. Connect DC voltmeter to terminals PG
and TH of combination valve.
7. Turn gas control valve knob to ON. Turn
thermostat to a setting higher than the
shortening temperature.
A. If the voltage measures 150 millivolts
or more but the burners do not ignite,
replace the combination valve.
B. If the voltage is less than 150 millivolts,
measure the voltage between
terminals NO of the high limit and PG
of the combination valve.
1) If the voltage is 200 millivolts or
greater, replace the thermostat.
2) If the voltage is less than 200
millivolts, replace the combination
valve.
THERMOSTAT CALIBRATION
1. Place temperature tester in the fry tank
near the thermostat bulb.
2. Set the thermostat to 300°F and allow the
temperature to stabilize.
3. Check the temperature tester reading
against the thermostat dial reading. If
there is a variance of more than ±20°F
(280°F to 320°F), calibration is required.
Calibration Steps
1. Remove thermostat knob from shaft.
2. Using a small screwdriver, rotate the
setscrew inside the hollow shaft
counterclockwise to increase the
temperature or clockwise to decrease the
temperature (1/4 turn equals approx-
imately 18°F).
3. Allow temperature to stabilize and recheck
temperature. Repeat until the temperature
falls within the limits as stated in step 3
under Thermostat Calibration.
4. Install thermostat knob and set dial to
350°
SERVICE PROCEDURES AND ADJUSTMENTS