Vulcan-hart VHX24G5 User Manual download pdf (Page 34)

VHX SERIES STEAMER - SERVICE PROCEDURES AND ADJUSTMENTS

F24700 (October 2001) Page 34 of 68

c. Replace the orifice, pressure

switch and connect the lead

wires to the switch. Turn the

power switch ON and adjust the

pressure switch again as outlined

in steps 4A and 4B. Verify the

pilot gas valve is energizing.

d. If the pilot gas valve is not

energizing and power is

available to the pressure switch,

turn the power switch OFF.

Replace with a new air pressure

switch and adjust the switch as

outlined from step 3 thru the end

of this procedure.

5. Restart the ignition sequence by "rapidly"

turning the power switch OFF then back ON. A

rapid switching is needed to keep the boiler

from starting automatic blowdown.

A. Press the reset switch to start the ignition

process.

1) Listen for gas pilot ignition to verify

operation.

a. If gas pilot ignition is successful,

turn the ON/OFF knob for the

main gas valve back to ON.

b. Listen for main gas burner

ignition to verify operation.

B. Verify the pilot and main burner both ignite

in succession.

1) Restart the ignition sequence by

"rapidly" turning the power switch

OFF then back ON. A rapid switching

is needed to keep the boiler from

starting automatic blowdown.

2) Press the reset switch to start the

ignition process.

C. Listen for main gas burner ignition to

verify operation.

GAS PILOT 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 BEFORE

SERVICING THE UNIT.

1. Open the cabinet base door to access pilot gas

valve.

2. Remove the pilot pressure plug tap from the

outlet

side of valve.

A. Install a hose barb adaptor and attach a

gas pressure manometer.

3. Turn the gas supply and power switch ON.

A. Once the boiler fills, press the reset switch

to start the ignition process.

NOTE

: The reset switch can be pressed after

the green ready light on the switch comes ON.

This indicates the water level in the boiler is at

the minimum operating level.

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Vulcan-hart VHX24G5 User Manual Page 34

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