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INSTALLATION AND OPERATION MANUAL
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Table 1 for the per circuit condensing unit capacity range of the various
PAC Fre-Heater units. To assure proper condensing unit operation, stay
within the capacity range specified.
A refrigeration unit exceeding the single circuit capacity of a specific PAC
Fre-Heater may be connected to two or more Fre-Heater circuits on one
or more Fre-Heaters having a combined circuit capacity equal to the
refrigeration unit
When making multiple Fre-Heater circuit connections to a single
refrigeration unit, the piping to the Fre-Heater circuits should be in parallel.
Series (through one circuit into another) piping of the Fre-Heater should not
be used.
A refrigerant line discharge muffler is not necessary for proper operation
or warranty coverage in a Fre-Heater installation. However, if the Fre-Heater
is to be installed in an area where any machine noise would be
objectionable, a discharge muffler should be considered as a method of
eliminating the normal compressor pulsation noise present in all
refrigeration systems.
Typical refrigeration unit piping is shown in Figures
If there is a hot gas defrost valve, an oil separator, and/or a discharge
muffler in the compressor discharge line, the Fre-Heater must be installed
downstream of it/them. See Figure for an illustration of this.
In the event of extended compressor operation with little or no water
usage, it is possible to generate water temperatures which exceed the
100°C setting of the pressure-temperature relief valve. This will result in
repeated dumping of hot water through the relief valve.
PAC HEAT RECOVERY WATER HEATER
Tubing must be routed such that no possibility of contacting
moving parts occurs.
Provide protection for tubing if the likelihood of accidental
damage occurring exists.
Always use a gear-type tubing bender when making bends
tubes. A conduit bender will flatten the tubing and restrict
the flow of refrigerant.
When installing tubing through walls or along a structural
member, be sure the tubing is isolated from these members
to avoid any transmissions or vibrations that might occur.
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