Vulcan-Hart ML-52163, Руководство по обслуживанию

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SERVICE PROCEDURES
Cabinet Bases
Certain procedures in this section
require electrical test or measurements while power is
applied to the machine. Exercise extreme caution at
all times. If test points are not easily accessible,
disconnect power and follow lockout / tagout
procedures, attach test equipment and reapply power
to the test.
BOILER INSPECTION / CLEANING
CAUTION
To ensure proper steamer operation,
periodic service must be performed as outlined in
these procedures.
It is recommended that the boiler be thoroughly
inspected for excessive scale and lime build up on a
quarterly basis. In hard water areas or for units heavily
used, a more frequent interval should be used. This
inspection consists of an internal examination and
cleaning of the boiler shell, an examination and
possible replacement of the descaler, a check of lime
build up on the water level sensing probes, and a
check of all boiler controls, including the pressure
switches.
Read and follow the instructions on
the CLR bottle. Use plastic or rubber gloves to avoid
skin contact. If CLR liquid comes in contact with the
skin, rinse with clean water.
Clean-Out (All Boiler Models)
1. Turn steamer OFF and drain boiler.
2. Remove hand hole plate and gasket (top front)
from the boiler by removing the nut and clamp,
then tapping the cover lightly to free it while
holding the cover stud. This prevents the cover
from dropping into boiler.
3. Remove old descaler retaining springs if present.
4. With a wire brush, or equivalent, dislodge and
remove all loose scale from boiler shell. The
loose material must be either scooped from the
boiler or flushed through the drain.
5. Check probe canister and float valve assembly
(regenerated models) for a scale build up and
clean as necessary.
6. Check drain hole for obstructions.
7. Install two new descalers.
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.
8. Mix the deliming solution according to the
instructions for the chemical in use then add
solution to boiler as follows.
• Models with Blowdown Timer. Mix the
solution in accordance with the instructions
on its container. Pour deliming solution into
boiler shell. Proceed to Step 9.
• 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. Pour deliming solution into boiler
shell. Proceed to Step 9.
• Models with Deliming Port Assembly.
Before mixing and pouring deliming solution
into boiler, clean the seating surfaces for the
hand hole gasket and then install a new
gasket. Position the hand hole plate and
tighten down. 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 (Fig. 9). Close
the deliming assembly valve and proceed to
Step 10.
Fig. 9
VSX BOILER BASE SERIES CONVECTION STEAMERS - SERVICE PROCEDURES
F24627 (0916) Page 14 of 82