Bakers Pride 616 Manual - Manual (Page 22)

22
TROUBLE SHOOTING
TEMPERATURE CALIBRATION
Thermostats are calibrated at the manufacturer and field adjustments are seldom necessary. They
should not be made unless actual cooking experience indicates the control is not maintaining set tem-
perature. Breaking the seal on the calibration plate locking screws may void the manufacturer’s war-
ranty for the thermostat.
Use a digital thermometer.
Place a thermocouple along the capillary bulb in the oven cavity.
Close the door.
Light the main burner. Adjust temperature setting to 400ºF.
Allow oven to heat until burner flame drops to by-pass.
Check temperature reading at thermometer. If not within 25º of set
point adjust dial setting.
To adjust:
Pull knob straight off. Do NOT turn stem while removing knob.
Grasp calibration plate and hold in place while loosening two cali-
bration lock screws. Use a #1 Phillips screwdriver.
The calibration plate has markings and the name “ROBERT
SHAW” stamped in it. There are approximately 50º between each
letter.
Turn calibration plate counter-clockwise to lower set point.
Turn calibration plate clockwise to increase set point.
Tighten locking screws and replace dial.
TEST THERMOPILE AND VALVE
Use these test procedures to trouble shoot the thermopile and combination gas valve. Prior to perform-
ing any tests clean and tighten all wire connections at the combination valve.
Clean the pilot orifice and insure the Thermopile is not coated with soot from a high pilot flame.
Use a digital volt meter with a scale capable
of reading millivolts.
System Test - pilot lights, main burner does
not.
Connect volt meter leads between terminal 2
and terminal 3. Turn gas cock dial to “ON”.
If meter reading is greater than 100 mV re-
place valve. If meter reading is less than 100
mV run additional tests.
Thermopile Output Test - pilot won’t stay lit
or main burner won’t light.
Connect volt meter leads between terminal 1
and terminal 2. Remove jumper from termi-
nal 3. Gas cock dial in “PILOT” position. If
meter reading is less than 325 mV replace
Thermopile.
INDICATOR MARK
LOCK
SCREWS
CALIBRATION PLATE
1
2
3