Vulcan-Hart ML-52163, Руководство по обслуживанию

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Fig. 13
B. Inspect the ceramic flame rod insulator for
cracks or evidence of exposure to extreme
heat, which can permit leakage to ground. If
either of these conditions exist, then replace
the pilot ignitor assembly.
C. Check the ignition cable for tightness or
damaged insulation.
3. Recheck unit for proper operation.
Manifold Pressure Adjustment
Measure the pressure as follows:
1. Open the front cabinet doors.
2. Turn the gas combination control valve (Step 2)
to OFF.
Fig. 14
3. Remove the 1/8 inch NPT plug (pressure tap) on
the outlet (manifold) side of the valve and attach
a manometer.
4. Turn the gas combination control valve and the
main power switch to ON.
5. Observe the manometer pressure reading and
compare to the pressure chart near the end of
this procedure.
6. If other appliances are connected to the same
gas line:
A. Turn them all ON.
B. Check manometer pressure reading again.
• If a pressure drop of ½ inch water
column or more is observed, then the
gas supply needs to be checked by the
gas line installer or the local gas
company for adequate sizing.
7. If no other gas appliances are connected to the
gas line and the manifold pressure still requires
adjustment, perform the steps below.
NOTE: Accurate gas pressure adjustments can only
be made with the gas ON and the burner lit.
A. Remove the adjustment screw cap to
access the pressure adjustment screw.
• To increase pressure, turn the screw
clockwise .
• To decrease pressure, turn the screw
counterclockwise .
NOTE: If the incoming line pressure is less than the
minimum stated, then the manifold pressure can not
be set correctly.
B. After the burner lights, set the pressure as
outlined below.
C. Once the correct pressure has been set:
1) Turn the power switch OFF.
2) Replace the adjustment screw cap and
1/8 inch NPT plug (pressure tap) on the
outlet side of the valve.
HEAT - ELECTRIC MODELS
VSX BOILER BASE SERIES CONVECTION STEAMERS - SERVICE PROCEDURES
F24627 (0916) Page 24 of 82