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VHX SERIES STEAMER - SERVICE PROCEDURES AND ADJUSTMENTS
F24700 (October 2001) Page 24 of 68
WARNING
: READ AND FOLLOW THE
INSTRUCTIONS FOR THE DE-LIMING CHEMICAL
BEING USED. USE PLASTIC OR RUBBER
GLOVES TO AVOID SKIN CONTACT. IF THE
CHEMICAL COMES IN CONTACT WITH SKIN,
RINSE WITH CLEAN WATER.
5. Mix deliming solution according to the
instructions for the chemical being used.
NOTE:
Boiler water capacity is approximately seven
gallons.
NOTE:
If deliming solution comes in contact with
steamer components, lightly rinse off with clean
water.
A. Turn OFF water supply.
B. Turn power switch ON to close the drain
valve.
C. Pour deliming solution into the boiler shell.
6. Install a new gasket on the hand hole plate then
position and tighten the plate to the boiler.
7. Ensure cooking compartment timers are OFF.
8. Turn power switch ON and open water supply
valve.
9. Allow the boiler to reach operating pressure
and run for 90 minutes or per the instructions
for the deliming chemical in use.
A. Turn power switch OFF and allow the
boiler to completely drain.
B. Turn power switch ON to refill boiler and
allow to heat until fully pressurized.
10. Steps 9A and 9B
must
be repeated three times
to thoroughly rinse the boiler.
11. Steamer is now ready for normal operation.
Descaler (Cathodic Protector)
Two descalers are installed inside the boiler shell
and are used to as a preventative measure to:
• Reduce scale deposit buildup
• Help remove existing scale deposits
• Inhibit boiler and component corrosion
The type of descaler used has a coiled wire
(Cathode) wrapped around a solid cylindrical core
(Anode) that hangs by an open loop from the front
horizontal support rod inside the boiler.
The descaler materials serve as a sacrificial
"Anode" and "Cathode" combination that chemically
reacts with the contents of the boiler to meet the
three objectives outlined above.
If the coiled wire has eroded away or if the
cylindrical core of the descaler has eroded away to
approximately half its original diameter, a new
descaler should be installed. The size of a new
descaler is approximately: 1 3/8" diameter and 3
3/4" long at the core.
NOTE:
While the diameter of the descaler
decreases through erosion, the length of the
descaler will increase. If the descaler has increased
to a length that is touching the bottom of the boiler
shell, the descaler should be replaced.
The descalers are accessible through the "heat
exchanger" opening in the boiler only. For removal
of the heat exchanger refer to "HEAT
EXCHANGER" under "REMOVAL AND
REPLACEMENT OF PARTS".
To install a new descaler, stretch the coiled wire at
the top to elongate the wire and form an open loop.
Hang the descaler on the front horizontal support
rod so that its core will be completely below the
minimum
water level in the boiler but hanging free.
The descaler must not
contact the boiler shell or the
heat exchanger casting.
WATER LEVEL PROBE
HOUSING BLOWDOWN
The water contained in the probe housing, being
under pressure, should be "blown through" this
manual valve and be noticeably visible exhausting
out the steamer drain. The probe housing blowdown
should be performed in a time frame dependant on
the quality of the local water supply and steamer
usage. In hard water areas or for steamers heavily