Specifications

24
 Verify that the TX Valve and solenoid
valves are free of debris. Clean or
replace them as necessary.
 Replace the suction filter with a suction
line filter-drier designed specifically for
cleaning system burnouts (Sporlan “HH”
series or equivalent). Select filters that
are equipped with a tap for measuring
the pressure drop across the filter.
Remove the old liquid line filter-drier and
replace it with a new filter one size
larger than the original.
 Remove the old compressor if you have
not already done so. Install the new
compressor.
 Evacuate the system to 250 microns or
lower.
 Replace all compressor contactors, start
capacitors, run capacitors, and starting
relays.
 Check the piping and joints for leaks,
and recharge the system.
 Operate the unit for an hour in all
modes. (The duct heater may have to
operate to maintain the space
temperature while operating in air
conditioning mode. Contact Seresco for
instructions.)
It is critical that the unit be run in
AC mode for cleaning system
burnouts. The entire system must
clean and acid free.
 Monitor the pressure drop across the
suction filter. If the pressure drop is 3 psi
or less after one hour, continue to run
the system for 24 hours, then take an oil
sample. If the oil sample is dirty or
acidic, or if the one-hour pressure drop
is greater than 3 psi, then recover the
system charge and replace both the
suction and liquid filter-dryers.
 Repeat the previous step until your oil
sample tests negative.
Seresco will require a copy of the acid test
result if there is a warranty replacement
request.
6. Service References
6.1. Nameplate/Factory Label. The unit
nameplate (Figure 24) and is attached to the
outside of the electrical box door. You will
require the rating plate information when you
install and service the dehumidifier.
The serial number will be required
should you ever require information
to a specific unit.
Figure 24 – Unit Nameplate/Factory Label