INSTALLATION AND OPERATION MANUAL
PAC HEAT RECOVERY WATER HEATER
To avoid the repeated release of hot water by the pressure/temperature
relief valve, should be installed. Installation and operation instructions
for the above bypass system are included with these instructions for your
reference and the port size is large enough to allow unrestricted refrigerant
flow.
For maximum refrigeration unit efficiency and Fre-Heater heat
recovery, head pressure controls must be used.
On air-cooled refrigeration units, you must install head-pressure-
operated fan controls; and on water-cooled refrigeration units, you must
install a head-pressure-operated water valve, if they are not already on the
refrigeration units. On many low temperature applications, an auxiliary
cooling fan must be installed on the compressor if the condenser fan is
cycled to maintain head pressure. Consult the compressor manufacturer for
their recommendation if you are in doubt of sufficient air flow for compressor
cooling.
Refrigerant Charge
It may be necessary to add additional charge in some refrigeration
systems. Check the sight glass and, if necessary, add refrigerant to clear
the sight glass. Final charging of the system must be done after the water
in the Fre-Heater becomes warm.
Test Run
Turn on the water supply and fill the Model PAC Fre-Heater with
water. Ensure that all water and refrigeration connections are leak-
free. The unit is then ready for use. Refrigerant charge should be
checked after the system has achieved normal operating conditions.
Be sure to check for proper operation of any and all controls, valves,
etc., installed with or changed during the installation of the Fre-
Heater, both in the refrigeration and water systems.
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