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Figure 7: Recommended Piping for Combination Heating and Cooling (Refrigeration) System
B. Install Pressure Relief Valve. See Figures 8 and 9.
Pressure Relief Valve must be installed with spindle in
the vertical position. Installation of the relief valve
must be consistent with ANSI/ASME Boiler and
Pressure Vessel Code, Section IV.
E. After the boiler and system have been cleaned and
flushed, and before refilling the entire system add
appropriate water treatment chemicals, if necessary, to
bring the pH between 7 and 11.
D. Oil, grease, and other foreign materials which accumu-
late in new hot water and a new or reworked system
should be boiled out, and then thoroughly flushed. A
qualified water treatment chemical specialist should be
consulted for recommendations regarding appropriate
chemical compounds and concentrations which are
compatible with local environmental regulations.
C. Install Drain Valve in return piping. See Figures 8
and 9.