VSX SERIES STEAMER - SERVICE PROCEDURES
Page 18 of 80
High Limit Thermostat
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.
Remove thermostat (bi-metallic disk type) and
inspect flat surface of thermostat for corrosion or
rust. Replace if rusted.
Clean thermostat mounting and thermostat surfaces
before remounting or replacing. A good
metal-to-metal contact is essential for proper
functioning of the thermostat. This service must be
performed at least once a year.
On gas boilers, the high limit thermostat is located
on the face of the boiler close to the sight glass on
the right side. For access, remove the small metal
cover placed over the thermostat.
On electric boilers, the high limit thermostat is
located behind the contactor box cover. On electric
boilers with two heating elements, the thermostat is
connected to one of the heating element lugs. On
electric boilers with four heating elements, the
thermostat is located between the center pair of
elements at the top of the elements.
Removing The Boiler Assembly
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.
WARNING:
ALL GAS JOINTS DISTURBED
DURING SERVICING MUST BE CHECKED FOR
LEAKS. CHECK WITH A SOAP AND WATER
SOLUTION (BUBBLES). DO NOT USE AN OPEN
FLAME.
A. CHECK ALL JOINTS PRIOR TO THE
GAS VALVE (SOLENOID) BEFORE
LIGHTING UNIT.
B. CHECK ALL JOINTS BEYOND GAS
VALVE (SOLENOID) AFTER UNIT IS LIT.
Newer Steamer Models
-
Blow down the boiler and
allow to cool, if necessary. Ensure that all utilities to
the steamer are off. Drain any excess water from
the boiler. Disconnect the steam supply line, power
leads and drain lines from the cooking compartment
top to the boiler base. Remove the cooking
compartment top by unscrewing the bolts holding
the cooking compartment top to the boiler base. The
bolts are located behind the small louvered access
panels on the left and right side of the steamer. Lift
the top off the boiler base and place to the side.
Remove the remaining plumbing and electrical
connections from the boiler to the controls. Remove
the bolts securing the boiler to the frame and lift it
out. Reverse procedure to install a new boiler.
Older Steamer Models
- Blow down the boiler and
allow to cool, if necessary. Turn off all utilities to the
steamer and disconnect supply lines. Drain any
excess water from the boiler. Remove the screws
holding any control box that would obstruct removal
of the boiler through the front of the base.
Disconnect the 1/4 inch diameter water inlet tubing.
Disconnect the wire and conduit from the low water
cut-off probes, high limit thermostat, and the
automatic blowdown valve (if so equipped).
Uncouple the union on the steam outlet and blow
down the lines.
Remove all the screws holding the flue and flue
collector to the base. Remove the anchor screws
holding the boiler to the frame. Slide the boiler
forward. The burner box, anchored only by the
boiler, must be prevented from sliding forward with
the boiler.
Fill and Cold Water Solenoid Valves
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.
Removal
1. Turn off the water supply to the steamer.
2. Open the base doors and remove the two
screws from the top of the boiler control box.
3. Pull the quick connect power leads off the
solenoid valve being serviced.
4. Disconnect the water lines for the valve being
serviced and remove the valve from the unit.
5. Reverse procedure to install.
Disassembly
NOTE:
It is recommended that the valve be
removed from the unit for cleaning to prevent
damage to the lines and fittings when the stem is
removed from the body.
1. Remove the coil assembly from the valve stem
by lifting up on the retaining cap at the top of
the solenoid valve and sliding the metal cover
plate off.
2. Clamp the body of the valve in a vise.
3. Mark a scribe line on the stem nut to the valve
body for proper retightening.
