9.
Clean the seating surfaces for the hand hole
gasket and then install a new gasket. Position
and tighten the hand hole plate.
10. Cooking compartment timers are to be in the OFF
position. Turn the boiler switch ON and open
water valve if necessary.
11. Allow boiler to operate under pressure for 90
minutes or per the instructions for the chemical
in use.
12. Drain boiler by normal methods. Refill boiler and
allow heat until fully pressurized.
13. Repeat Step 12 three times.
14. The steamer is now ready for normal operation.
Deliming Only (Models with Deliming Port
Assembly
)
NOTE:
Boiler deliming should be performed on a
weekly, bi-weekly or monthly basis, depending on the
quality of the local water supply.
On steamers using a water purification system, follow
the instructions for that system to delime the boiler.
Only use the type of chemical recommended or
described in the instructions for deliming with this type
of system.
1.
Turn steamer OFF and drain boiler.
2.
Mix the deliming solution according to the
instructions for the chemical in use then add
solution to boiler.
NOTE:
Boiler water capacities vary between seven to
nine gallons for both gas and electric models
depending on the boiler size and BTU/KW rating.
NOTE:
If deliming solution accidently comes in
contact with steamer components, lightly rinse off with
clean water.
•
Models with Blowdown Timer.
Mix the
solution in accordance with the instructions
on its container. Open the deliming
assembly valve and pour the deliming
solution into the port. Close the deliming
assembly valve and proceed to Step 3.
•
Models without Blowdown Timer.
Turn off
the incoming water supply. Turn the unit ON
to close the drain valve. Mix the solution in
accordance with the instructions on its
container. Open the deliming assembly
valve and pour the deliming solution into the
port. Close the deliming assembly valve and
proceed to Step 3.
3.
Top compartments are to be in the OFF position.
Turn the boiler switch ON and open water valve
if necessary.
4.
Allow boiler to operate under pressure for 90
minutes or per the instructions for the chemical
in use.
5.
Drain boiler by normal methods. Refill boiler and
allow to heat up and build steam pressure.
6.
Repeat Step 5 three times.
7.
Unit is now ready for normal operation.
Descaler
NOTE:
The descaler is accessible through the hand
hole opening. It is a coiled wire wound around a solid
cylindrical core. It hangs by an open loop from the
shell's horizontal stay rod, about 4 inches from the
front of the shell.
If the wire is eaten through, or if the core of the
descaler is eaten away to half its original size, a new
descaler should be installed.
CAUTION
The descaler must not contact the
bottom of the boiler shell, electric heating elements, or
the regenerating steam coils on units so equipped.
To install a new descaler, stretch its wire coil so that
the descaler hangs with its core completely below the
minimum water level in the boiler, but hanging free.
WATER LEVEL CONTROLS
The steamer incorporates both low level cut-off and
differential controls. These controls can be either solid
state or electro-mechanical.
Solid State Controls
1.
Ensure that water is filling the boiler.
2.
Check for correct voltage being applied to the
board.
3.
Verify the water level control board operation as
outlined in Water Level Controls and as follows:
A.
The HL LED turns on and the HL relay
energizes to change the contact state at
power on.
B.
As the boiler fills the LLCO LED turns on and
the LLCO relay energizes to change the
contact state after the water level reaches
the LLCO probe.
C.
The HL LED turns off and the HL relay de-
energizes. This allows the contact state to
switch back to its starting condition after the
water level reaches the HL probe.
VSX BOILER BASE SERIES CONVECTION STEAMERS - SERVICE PROCEDURES
Page 15 of 82
F24627 (0916)
