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IV. Water Piping and Trim
CAUTION
Failure to properly pipe boiler may result in
improper operation and damage to boiler or
structure.
1. Design and install boiler and system piping to
prevent oxygen contamination of boiler water and
frequent water additions.
CAUTION
Oxygen contamination of boiler water will
cause corrosion of iron and steel boiler
components, and can lead to boiler fail-
ure. Thermal Solutions Standard Warranty
does not cover problems caused by oxy-
gen contamination of boiler water or scale
(lime) build-up cause by frequent addition of
water.
CAUTION
All piping either new or existing must be
cleaned with a tri sodium phosphate (TSP)
solution to remove mill scale and oils from
the system. Failure to do so could result in
premature failure of the heat exchanger (not
covered by Thermal Solutions warranty.)
CAUTION
On an existing or retrofit system, a filter or
strainer must be installed on the system
return prior to the boilers.
CAUTION
When using Glycol products, all Glycol
manufacturers' requirements, including
rust inhibitors, must be adhered. Max 50%
Glycol.
a. There are many possible causes of oxygen con-
tamination such as:
i.
Addition of excessive make-up water as a
result of system leaks.
ii. Absorption through open tanks and fittings.
0
iii. Oxygen permeable materials in the distribu-
tion system.
b. In order to insure long product life, oxygen
sources must be eliminated. This can be accom-
plished by taking the following measures:
i.
Repairing system leaks to eliminate the need
for addition of make-up water.
ii. Eliminating and/or repairing fittings which
allow oxygen absorption.
iii. Using non-permeable materials in the distri-
bution system.
iv. Isolating the boiler from the system water by
installing a heat exchanger.
vi. Using properly designed and operating air
elimination devices in water piping.
2. Design and install system piping to prevent return
water temperatures below 130°F. Refer to Table 2
for boiler flow and pressure drop requirements.
3. Connect system supply and return piping to boiler.
Refer to Figure 12. Also consult I=B=R Installation
CAUTION
Return water temperature below 130°F
will cause flue gas condensation inside the
boiler. Flue gas condensate can lead to
boiler failure. Thermal Solutions Standard
Warranty does not cover problems caused
by flue gas condensation.
WARNING
Supply and return water temperature differ-
ences greater than 40°F can lead to boiler
failure. Thermal Solutions Standard War-
ranty does not cover problems caused by
temperature difference greater than 40°F.
and Piping Guides. Maintain ½" minimum distance
between water piping and combustible material.
Consult Thermal Solutions for unusual system
requirements.
4. A pressure relief valve is supplied with each appli-
ance. No valve is to be placed between the relief
valve and appliance. No reducing coupling or other
restriction shall be installed in the discharge line.
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