Gas Valve Pressure Check; Verification Of Spark At Ignitor - Vulcan-Hart SG SERIES Service Manual

SG SERIES GAS CONVECTION OVENS - SERVICE PRODCEDURES AND ADJUSTMENTS
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 VALVE PRESSURE CHECK

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.
GAS TYPE
Natural 5.0
Propane 10.0
NOTE: If the incoming line pressure to the valve is
less than the minimum stated, then the manifold
pressure will not be maintained
TEMP (°F) OHMS*
360 822
380 656
400 529
425 424
450 334
475 266
Disconnect the
PRESSURE READINGS (IN W.C.)
MANIFOLD
8.0
11.0
Page 19 of 31
3. Remove the plug from the manifold pressure
port.
4. Install hose barb adapter and attach manometer
tube.
5. Turn gas supply to the oven back on.
6. Plug the unit in and turn the power switch ON.
7. Set the temperature control to its highest setting
and allow burner to ignite.
NOTE: The burner must be lit during test.
NOTE: Accurate gas pressure readings can only be
made with the gas on and the burner lit.
LINE
RECOMMENDED
VERIFICATION OF SPARK AT
IGNITOR
electrical power to the machine and
follow lockout / tagout procedures.
Fig. 42
MIN MAX
6.0
14.0
11.0
Disconnect the
F45525 (0814)