VSX SERIES STEAMER - SERVICE PROCEDURES
Page 20 of 80
Steamer Achieves Pressure Slower Than Normal
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
following conditions.
NORMAL OPERATING
STEAM PRESSURES
UNIT RANGE (PSI)
Gas 8 - 10
Electric 11 - 13
Direct 10 - 12
Regenerated 10 - 12
1.
All Models (With Boiler)
A. A heavy build-up of scalants has possibly
coated the interior of the boiler. The
insulating effect of the scalants hampers
heat transfer. Unbolt and remove the hand
hole cover plate and gasket assembly.
Examine interior of boiler and if scalants
and/or lime build up is apparent, perform a
boiler clean-out and deliming procedure.
See “BOILER”. If considerable scalants
are evident, then both the boiler blowdown
solenoid valve and the water level control
must also be examined.
2.
Gas Models
A. Low incoming gas pressure causes
reduced BTU output. Check incoming line
and manifold gas pressures as outlined in
“MANIFOLD PRESSURE ADJUSTMENT.”
B. Gas combination control valve
malfunction. Check incoming and manifold
gas pressures as outlined in “MANIFOLD
PRESSURE ADJUSTMENT.” If pressure
adjustments are made and manifold
pressure remains low, replace the
combination valve and test unit for proper
operation.
C. Gas burner ports clogged or obstruction
around air shutter. After a period of time,
gas burners can accumulate carbon in
their ports or become clogged by food and
grease debris from kitchen cleaning,
restricting performance. To clean burners,
remove them from burner box and boil in
water for 10 -15 minutes to dislodge clog.
Clean-out any remaining debris from the
gas ports using a wire brush, scribe or pic
type metal instrument. Remove any other
foreign objects that appear to be
obstructing the gas ports or air shutters.
D. Gas orifice clogged or obstructed around
air shutter. It is possible for debris to
become lodged in the small gas orifice
opening over time. Clean-out the gas
orifice using a round metal instrument of
the same hole diameter or slightly smaller.
Clean as needed. If clogging reappears,
the orifice should be removed, cleaned
and reinstalled. Remove any other foreign
objects that appear to be obstructing the
gas orifice or air shutters.
3.
Electric Models
A. Heavy scale build up on heating element
causes reduced heating.
B. One or more electric heating elements
malfunctioning.
C. One or more magnetic contactors not
pulling in, to power heating elements.
D. If unit operates under three phase power,
then one of the phases might be lost.
4.
Direct Steam Models
A. Building steam supply pressure low.
B. Cooking compartment steam solenoid
valve malfunction.
C. Steam pressure regulator adjusted too
low.
D. Clogging in the steam line reduces steam
supply.
5.
Regenerated (Steam Coil) Steamers
A. Heavy scale build up inside copper steam
coil.
B. Building steam supply pressure low
C. Cooking compartment steam solenoid
valve malfunction.
