6
Figure 4: Recommended Water Piping for Zone Valve Zoned Heating Systems
C. Install Safety Relief Valve. See Figure 4. Safety Relief
Valve must be installed with spindle in vertical position. Installation of the relief valve must be consistent with
the ASME Boiler and Pressure Vessel Code, Section IV.
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D. If boiler is used in connection with refrigeration
systems, boiler must be installed with chilled medium
piped in parallel with the heating boiler using
appropriate valves to prevent chilled medium from
entering boiler, see Figure 5. Also consult I=B=R
Installation and Piping Guides.
Refer to Figure 5a for a diagram of the water piping
system inside the Minuteman® II's jacket.
E. If boiler is connected to heating coils located in air
handling units where they may be exposed to
refrigerated air, boiler piping must be equipped with
fl ow control valves to prevent gravity circulation of
boiler water during operation of cooling system.
F. Use a boiler bypass if the boiler is to be operated in a
system which has a large volume or excessive radiation
where low boiler water temperatures may be
encountered (i.e. converted gravity circulation system,
etc.).