B. THERMOPILE OUTPUT CHECK
(“B” Reading. Thermostat contacts OPEN - Main burner
OFF.)
1. Thermopile system - 325 millivolts minimum. If the mini-
mum millivolt reading is not obtainable, readjust ther-
mopile for maximum millivolt output. If millivolt reading is
still below minimum specified, replace thermopile.
C. THERMOSTAT RESISTANCE CHECK
(“C” Reading. Thermostat contacts CLOSED - Gas valve
knob “ON”. Main burner should be ON.)
1. If the “C” reading is above 80 millivolts, the resistance in
the system is excessive and must be reduced. To correct:
a. Clean and tighten thermostat leads and connections.
b. Shorten or replace thermostat lead wires.
c. Cycle thermostat rapidly (manually turn dial) to clean
contacts.
D. AUTOMATIC PILOT DROPOUT CHECK
1. Hold gas valve knob depressed in pilot position until max-
imum output is observed. Then extinguish pilot and
observe meter.
2. Dropout of automatic pilot magnet (sound should be audi-
ble) should occur between
120
millivolts and
30
millivolts. If
dropout occurs outside these limits, change the valve.
MILLIVOLT CONTROL VALVE
To check Resistance of the gas valve, connect one wire
to the valve as shown.
1.
Resistance between the THTP & TH terminals
must be 11.5
⍀
±0.2
⍀
2.
Resistance between the THTP & TP terminals
must be 10.0
⍀
±0.2
⍀
If resistance is outside of specifications listed, the gas
valve must be replaced.
BEFORE REPLACING THERMOPILE CHECK
MILLIVOLT READINGS
THERMOPILE READINGS
With all wires connected, with the pilot on and burners
off, the thermopile reading at the TP&THTP terminals
should be ~325mv. With the burners on, the millvolt
reading should be ~200mv.
WARNING AND OPERATING PLATES
All warning and operating plates on the Keating MIRA-
CLEAN
®
Griddle should be in place at all times. If
plates are damaged or lost, replace them immediately.
13
Summary of Contents for SERIES 2000
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