Gas Pressure Adjustment - Vulcan-Hart VC4GC Service Manual

FULL SIZE GAS CONVECTION OVENS - SERVICE PROCEDURES AND ADJUSTMENTS
5. Reverse procedure to install.
TEMP (°F) OHMS*
77 90000
240 4077
260 3016
280 2266
300 1726
320 1332
340 1041
(*) Resistance in ohms ± 10%

GAS PRESSURE ADJUSTMENT

Shut off the gas before servicing
the unit.
1. Remove the right side panel as outlined under
COVERS AND PANELS in REMOVAL AND
REPLACEMENT OF PARTS.
NOTE: If right side panel is not accessible, this
component can be serviced by removing the control
panel as outlined under COVERS AND PANELS.
2. Remove the plug from the manifold pressure
port.
F24682 (Rev. B, October 2007)
TEMP (°F) OHMS*
360 822
380 656
400 529
425 424
450 334
475 266
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3. Install hose barb adapter and attach manometer
tube.
4. Remove adjustment screw cap from the gas
valve and turn gas supply to the oven back on.
5. Plug the unit in and turn the power switch ON.
6. Set the temperature control to its highest setting
and allow burner to ignite.
NOTE: Accurate gas pressure adjustments can only
be made with the gas on and the burner lit.
7. Turn the set screw to obtain the proper gas
pressure (clockwise = pressure increase;
counterclockwise = pressure decrease).
PRESSURE READINGS (IN W.C.)
GAS
MANIFOLD
TYPE
RECOMMENDED MIN MAX
Natural 3.5
Propane 10
NOTE: If the incoming line pressure to the valve is
less than the minimum stated, then the manifold
pressure can not be set correctly.
LINE
7 5
14
11 11