1.
Detach, remove, and thoroughly clean the water
level probe and canister assembly to remove
scalants and lime build up.
2.
If cleaning does not resolve the problem, replace
the water level probes and canister assembly.
3.
Perform a boiler clean-out and deliming
procedure. Refer to BOILER INSPECTION /
CLEANING for detailed instructions.
Water Solenoid Valve
NOTE:
An open boiler blowdown solenoid valve as
will allow water to drain as quickly as it’s fed to the
boiler.
Check for the following:
•
Loose / damaged wiring.
•
Burned out coil.
•
Dirty / damaged valve seat.
Newer Steamer Models
NOTE:
Newer steamer models use a plunger type rod
that raises and lowers to permit steam/water flow out
of boiler.
1.
Inspect the water orifice.
2.
If required, clean the water orifice.
3.
If valve still leaks:
A.
Remove and disassemble the valve. Refer
to FILL AND COLD WATER SOLENOID
VALVES for detailed instructions.
B.
Remove any debris found on the sealing
surfaces.
C.
Reassemble and reinstall the valve.
D.
If valve still malfunctions, replace it and
recheck for proper operation.
Older Steamer Models
NOTE:
Older steamer models have a movable blade.
When closed, the blade reacts as a guillotine that
should be free to move fully down into the valve pocket
(projection at bottom of valve) so that the pierced hole
in the blade aligns perfectly with the body opening.
1.
Remove the valve. Refer to FILL AND COLD
WATER SOLENOID VALVES for detailed
instructions.
2.
Remove the two assembly bolts and separate the
brass valve body parts.
3.
Remove the loose internal parts from the valve
body portion.
4.
Remove any debris found on the sealing
surfaces.
5.
Reassemble and reinstall the valve.
6.
If valve still malfunctions, replace it and recheck
for proper operation.
BLOWDOWN SOLENOID VALVE DOES NOT
DRAIN
The pressurized water contained in the boiler should
be blown through this valve and be noticeably visible
exhausting out the steamer drain.
NOTE:
The automatic blowdown solenoid valve is not
present on all models.
Older Models.
These steamers have a blowdown
timer button. When this button is pressed, the boiler
blowdown valve opens and pressure is released.
Newer Models.
These steamers have a normally
open solenoid valve. When the main power switch is
turned ON, the valve energizes (closes) to allow
pressure to build up. When the main power switch is
turned OFF, the solenoid valve de-energizes and
pressure is released.
If the blowdown operation appears to function
sluggishly or not at all, considerable scalants may be
lodged in the drain pipe and/or the valve.
1.
Disconnect the valve from the drain line.
2.
Inspect both the valve and the drain pipe fixed to
the boiler.
If considerable scalants or lime build up is apparent,
both the valve and the boiler must be cleaned. Refer
to BOILER INSPECTION / CLEANING and FILL AND
COLD WATER SOLENOID VALVES for detailed
cleaning instructions.
SLOW PRESSURE BUILD UP
If the boiler requires more than 15 minutes (20 minutes
for regenerated models) to achieve normal operating
pressure as listed in below, then check the conditions
listed in the table below.
Normal Operating Pressures
Unit
Range (PSI)
Gas
8 - 10
Electric
11 - 13
Direct
10 - 12
Regenerated
10 - 12
All Models (With Boiler)
NOTE:
A heavy build-up of scalants will hamper heat
transfer.
VSX BOILER BASE SERIES CONVECTION STEAMERS - SERVICE PROCEDURES
Page 19 of 82
F24627 (0916)
