106636-04 - 8/22
13
X-2
Installation, Operating & Service Manual
7
Water Piping
(continued)
4. Connect system supply and return piping to
boiler. Refer to Figures 7-1, 7-2, and 7-3. Also
consult Residential Hydronic Heating Installation
and Design I=B=R Guide. Maintain minimum
½ inch clearance from hot water piping to
combustible materials.
5. If boiler is used in connection with refrigeration
systems, See Appendix: "Combination
Refrigeration/Heating System".
6. 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".
7. 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 7-1: Near Boiler Piping
