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gravity circulation of boiler water during the
operation of the cooling system.
d. If boiler is used with an Indirect-Fired Domestic
Water Heater, install the Indirect-Fired Domestic
Water Heater as a separate heating zone. Refer
to the Indirect-Fired Domestic Water Heater
Installation, Operating, and Service Instructions
for additional information.
e. A water boiler installed above radiation level
must be provided with a low water cutoff device
as part of the installation.
B
.
INSTALL SAFETY RELIEF VALVE. See Figures
5A or 5B and 8A or 8B. Safety 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.
WARNING
Installation is NOT complete unless a safety relief
valve is installed as shown in Figure 8A or 8B.
Safety (relief) valve discharge piping must be
piped near floor to eliminate potential of severe
burns. DO NOT pipe in any area where freezing
could occur. DO NOT install any shut-off valves,
plugs or caps.
IV. WATER PIPING AND TRIM (continued)
C.
INSTALL DRAIN VALVE in return piping. See
Figures 8A and 8B.
D
. OIL, GREASE, AND OTHER FOREIGN
MATERIALS which accumulate 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.
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.