INSTALLATION AND OPERATION MANUAL
PAC HEAT RECOVERY WATER HEATER
Page
24
Figure 7 : Installing PAC Fre-Heater in parallel series
4.
Refrigerant system installations
Heat Recovery Water Heaters are shipped with a dry nitrogen holding charge
that must be removed from the Heat Recovery Water Heater piping before installation
of refrigerant piping.
Good refrigeration practices must be used while installing the heat Recover
Water Heater. These practices are of commom knowledge to the experienced
refrigeration serviceman should undertake the refrigeration connection portion of a
Heat Recovery Water Heater installation.
Inlet and outlet stubs are copper tube for Freon applications and stainless steel
male pipe thread for ammonia applications. The sizes of refrigeration connections for
various PAC Heat Recovery Water Heater are shown in Table 1.
On runs 8 meters or less, refrigeration lines to and from the Heat Recovery
Water Heater should be the same size as the compressor discharge line.
Avoid long runs whenever possible. However, If necessary to have runs of
more than 8 meters, the lines should be upsized by one tube size. Should there be
any question about refrigeration line size, the equipment manufacturer’s
recommendation should be followed.
