Manifold Pressure Adjustment - Vulcan-Hart VSX3E Service Manual

VSX SERIES STEAMER - SERVICE PROCEDURES AND ADJUSTMENTS
MANIFOLD PRESSURE
ADJUSTMENT
WARNING: DISCONNECT THE ELECTRICAL
POWER TO THE MACHINE AT THE MAIN
CIRCUIT BOX. PLACE A TAG ON THE CIRCUIT
BOX INDICATING THE CIRCUIT IS BEING
SERVICED.
WARNING: SHUT OFF THE GAS SUPPLY
BEFORE SERVICING THE UNIT.
1. Remove right side panel as outlined under
"COVERS AND PANELS".
2. Remove the 1/4" NPT pipe plug from the
manifold and attach a manometer.
3. Remove the adjustment screw cap to access the
pressure adjustment screw.
A. To increase pressure, turn the screw
clockwise
B. To decrease pressure, turn the screw
counterclockwise
4. Plug in the unit, turn "on" the gas and set the
power switch to "on". If adjusting pressure on a
double unit, both must be "on" before a pressure
adjustment is made.
NOTE: Accurate gas pressure adjustments can only
be made with the gas "ON" and the burner lit.
5. After the burner lights, set the pressure as
outline below:
PRESSURE READINGS
GAS TYPE MANIFOLD
NATURAL 3.5
PROPANE 5.0
* If the incoming line pressure is less than the
(INCHES W.C.)
LINE
RECOMMENDED MIN MAX
7.0 5.0
14
11.0 7.0
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minimum stated, then the manifold pressure can not
be set correctly.
6. Once the correct pressure has been set, turn the
power switch "off", replace the adjustment
screw cap and manifold pipe plug.
7. Check unit for proper operation.