Gas Pressure Adjustment (Units Up To February 2015) - Vulcan-Hart VC4G Service Manual

VC4G & VC6G SERIES FULL SIZE CONVECTION OVENS - SERVICE PROCEDURES AND ADJUSTMENTS
type. As temperature increases the resistance value
decreases.
1. Remove the Right Side Panel.
NOTE: If right side panel is not accessible, this
component can be serviced by removing the Control
Panel.
2. Place a shielded thermocouple in the geometric
center of the oven cavity and determine the
temperature in the oven cavity.
3. Remove the probe lead wires from the solid state
temperature control.
4. Test the probe with an ohmmeter.
A. If the measured resistance values are inside
the given tolerance then the probe is
functioning properly.
B. If the measured resistance values are
outside the given tolerance then replace the
probe and retest.
1) Check oven for proper operation.
5. Reverse procedure to install.
TEMP (°F) OHMS*
77 90,000
240 4,077
260 3,016
280 2,266
300 1,726
320 1,332
340 1,041
(*) Resistance in ohms ± 10%
GAS PRESSURE ADJUSTMENT
(units up to February 2015)
electrical power to the machine and
follow lockout / tagout procedures.
1. Turn gas supply off at manual shutoff valve.
2. Remove the Right Side Panel.
NOTE: If right side panel is not accessible, this
component can be serviced by removing the Control
Panel.
3. Remove the plug from the manifold pressure
port.
F24682 Rev. D (1016)
TEMP (°F) OHMS*
360 822
380 656
400 529
425 424
450 334
475 266
Disconnect the
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FIRST GENERATION UNIT SHOWN (Before April
2005)
SECOND GENERATION UNIT SHOWN (After April
2005 thru February 2015)
4. Install hose barb adapter and attach manometer
tube.