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The procedures provided in this section are
arranged in order to make specific adjustment
and removal and replacement information easy
to locate.
Read the instructions throughly before performing
any adjustment or removal or replacement
procedures.
1. ADJUSTMENT OF THE AUTOMATIC
EXPANSION VALVE
The end to end frost on evaporator drum is the
result of the correct expansion valve setting.
This valve may be manually regulated by means
of the adjusting stem.
Turning the adjustment to the left counter-
clockwise, will increase the rate if refrigerant
flow.
Turning the adjustment to the right clockwise, the
refrigerant flow to the evaporator is reduced.
Use hex head wrench for manual adjusting
operations.
WARNING - Be sure the electrical power
supply and water supply are OFF, before
starting any of the following REMOVAL
AND REPLACEMENT procedures as a
precaution to prevent possible personal
injury or damage to equipment.
SECTION V
MAR SPLIT
ADJUSTMENT & REMOVAL & REPLACEMENT PROCEDURES
2. REMOVE AND REPLACEMENT OF
EVAPORATOR DRUM REFRIGERANT
SEALING DEVICES
1. Before removing the refrigerant manifold it is
necessary - at first - to close the valve on
liquid line. Upon low pressure switch cut-off,
the main switch must be put in "OFF" position,
then it is necessary to purge the refrigerant
system.
After these operations, the flare fitting at the
inlet of refrigerant manifold can be
disconnected as shown.
2. Remove the 4 allen screws of refrigerant
outlet fitting to manifold.
3. Unloose and remove the 6 nuts with respective
washers that secure the refrigerant manifold (1).
4. When removed the refrigerant manifold
unloose and remove one of the three screws
(11) securing the seal mechanism ring to the
drum shaft journal.
5. Fit in place of it the screw of 4 MA supplied in
the kit then tighten its nut.
6. Gradually unloose the two remaining screws
and the nut till release the spring of seal
mechanism.
7. Unloose the last screw to remove the seal
mechanism ring as well as the seal
mechanism S.S. ring and its spring.
8. Withdraw entirely the stainless steel ring (6)
that houses the graphitic seal ring.
