106636-02 - 12/19
10
X-2
Installation, Operating & Service Manual
6
Water Piping
WARNING
Failure to properly pipe boiler may result in
improper operation and damage to boiler or
building.
A. Design and install boiler and system piping to
prevent oxygen contamination of boiler water.
Oxygen contamination sources are system leaks
requiring addition of makeup water, fittings,
and oxygen permeable materials in distribution
system. Eliminate oxygen contamination by
repairing system leaks, repairing fittings, and
using non-permeable materials in distribution
system.
B. Install circulator with flanges, gaskets and bolts
provided.
C. Install Safety Relief Valve. See Figure 6-1. Safety
Relief Valve must be installed with spindle in
vertical position.
WARNING
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 between:
1. Safety relief valve and boiler
2. Safety relief valve and discharge
Union may be installed in safety relief valve
piping.
D. Connect system supply and return piping to
boiler. Refer to Figures 6-1, 6-2, and 6-3. Also
consult Residential Hydronic Heating Installation
and Design I=B=R Guide. Maintain minimum
½ inch clearance from hot water piping to
combustible materials.
E. If boiler is used in connection with refrigeration
systems, See Appendix: "Combination
Refrigeration/Heating System".
F. Use a boiler bypass if 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.). See Appendix: "Low Return Water
Temperatures".
G. Perform a long term pressure test of hydronic
system, isolate boiler to avoid a pressure loss due
to escape of air trapped in boiler.
To perform a long term pressure test including the
boiler, ALL trapped air must first be removed from
the boiler.
A loss of pressure during such a test, with no
visible water leakage, is an indication that the
boiler contained trapped air.
Figure 6-1: Near Boiler Piping
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