F.
Lift the top off the boiler base and place to
the side.
G. Remove the remaining plumbing and
electrical connections from the boiler to the
controls.
2.
Reverse the steps above to install the boiler.
Older Steamer Models
1.
Remove the boiler as follows:
A.
Check / ensure that all utilities to the
steamer are off.
B.
Blow down the boiler and allow to cool, if
necessary.
C.
Drain any excess water from the boiler.
D.
Remove the screws holding any control box
that would obstruct removal of the boiler
through the front of the base.
E.
Disconnect the 1/4 inch diameter water inlet
tubing.
F.
Disconnect the wire and conduit from the
low water cut-off probes, high limit
thermostat, and the automatic blowdown
valve (if so equipped).
G. Uncouple the union on the steam outlet and
blow down the lines.
H.
Remove all the screws holding the flue and
flue collector to the base.
I.
Remove the anchor screws holding the
boiler to the frame.
CAUTION
The burner box, anchored only by the
boiler, must be prevented from sliding forward with the
boiler.
J.
Slide the boiler forward and set aside
2.
Reverse the steps above to install the boiler.
FILL AND COLD WATER SOLENOID VALVES
1.
Remove the solenoid valve as follows:
A.
Turn off the water supply to the steamer.
B.
Open the base doors and remove the two
screws from the top of the boiler control box.
C.
Pull the quick connect power leads off the
solenoid valve being serviced.
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.
2.
Disassemble the solenoid valve as follows:
A.
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.
B.
Clamp the body of the valve in a vise.
C.
Mark a scribe line on the stem nut to the
valve body for proper retightening.
D.
Remove the stem locking nut to remove the
stem from the valve body.
3.
Inspect the solenoid valve (Fig. 10) as follows:
•
Check rubber seal on bottom of plunger.
•
Check plunger spring.
•
Check plunger spring.
•
Check ports in valve body.
Fig. 10
4.
Reverse Step 2 to reassemble the solenoid
valve.
5.
Reverse Step 1 to reinstall the solenoid valve.
WATER NOT BEING SUPPLIED TO BOILER
1.
Check that water is connected / supplied to
steamer.
2.
Turn the steamer on.
3.
If, after approximately 10 minutes, no water is
observed in the water level gauge sight glass,
check the following components:
•
Water level control probes.
•
Water solenoid valves.
Water Level Control Probe
NOTE:
This condition indicates extremely poor water
quality being supplied to the boiler and/or boiler clean
out/and deliming has not been performed. Scalants
may be covering the water level control probe giving
a false indication of a sufficient water level in the
boiler.
VSX BOILER BASE SERIES CONVECTION STEAMERS - SERVICE PROCEDURES
F24627 (0916)
Page 18 of 82
