10
1. For Forced Circulation HOT WATER HEATING,
refer to Figure 6 for recommended boiler piping.
Consult I=B=R ,"Residential Hydronic Heating
Installation and Design Guide".
2. Plug lower rear 1½" tapping if it is not to be used.
3. Install relief valve and fittings in top of front section,
see Figure 1.
4. Install drain valve and return piping in lower front
1-1/2" return tapping. If using return side circulator,
mount circulator on 18" return piping nipple
provided, otherwise mount circulator in supply side
piping, see Figure 1 and Figure 6.
CAUTION: OXYGEN CORROSION
Oxygen contamination of the boiler water will cause
corrosion of the iron and steel boiler components,
which can lead to failure. As such, any system
must be designed to prevent oxygen absorption in
the first place or prevent it from reaching the boiler.
Problems caused by oxygen contamination of boiler
water are not covered by U.S. Boiler Company's
standard warranty.
There are many possible causes of oxygen
contamination such as:
a. Addition of excessive make-up water as a result
of system leaks.
b. Absorption through open tanks and fittings.
c. Oxygen permeable materials in the distribution
system.
In order to insure long product life, oxygen sources
should be eliminated. This can be accomplished by
taking the following measures:
a. Repairing system leaks to eliminate the need for
addition of make-up water.
b. Eliminating open tanks from the system.
c. Eliminating and/or repairing fittings which allow
oxygen absorption.
d. Use of non-permeable materials in the
distribution system.
e. Isolating the boiler from the system water by
installing a heat exchanger.
5. 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.) the use of
a boiler water bypass is recommended to maintain
optimum operation.
III: INSTALLATION INSTRUCTIONS (continued)
Figure 6: Recommended Water Piping for Zone Valve Zoned Heating Systems
