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MAINTENANCE
l.fcusaaer
MC-8
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9_75_] .
MANUAL
SUPERHEAT CHECK FITTING
(Driver's Evaporator)
SUPERHEAT CHECK FITTING
{Main Evaporator)
reading according to temperature chart. EXAMPLE:
Suction pressure 30 P.S.I. converted to 32° on chart.
If temperature reading is 40°, subtract 32° and the
result will be 8° of superheat
CAUTION -
Before adjusting expansion valve,
check for restricti~n• on suction side for plugged
dehydrator and partially opened valves. These con-
ditions will give a high superheat.
MAINTENANCE
1) Pump down the system as directed earlier in this
section.
2) Disconnect the external equalizer line from the
under side of the power head and unclamp. the
remote control bulb from the evap'orator coil
outlet line.
3) Remove the two cap screws holding the power
assembly to the valve body flange. Lift off the
power assembly and remove the cage assembly.
When reassembling, replace with new gaskets in
proper place. Be sure the two lugs on the cage assem-
bly fit into grooves provided in the power assembly.
DO NOT force the valve together. The cage must fit
properly before tightening the body flange. Tighten
bolts evenly.
CAUTION- If necessary to make a soldered con-
nection, first remove the power and cage assemblies
and all gaskets. Keep heat away from all parts except
the body flange, particularly the remote control bulb.
SOLDERING
Before soldering any part of the system, make
sure the area is well ventilated. Use (Stay Clean) flux
sparingly and apply solder (95-5 round wire 1/8")
After completing repairs, test for leaks.
When using heat at or near a valve, wrap with a
water saturated rag to prevent over-heating of vital
parts.
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