Use and Care Manual

5. If this boiler is used in connection with refrigeration

systems, the boiler must be installed so that the

chilled medium is piped in parallel with the heating

boiler using appropriate valves to prevent the

chilled medium from entering the boiler, see Figure

5. Also, consult Residential Hydronic Heating

Installation and Design I=B=R Guide.

6. A hot water boiler installed above radiation level

must be provided with a low water cutoff device as

part of the installation. See Section X, Low Water

Cut-Off for additional details.

7. Oxygen Contamination:

a. There are many possible causes of oxygen

contamination such as:

i. Addition of excessive make-up water as a

result of system leaks.

ii. Absorption through open tanks and ttings.

Figure 4: Recommended Boiler Piping for Series Loop Hot Water System

iii. Oxygen permeable materials in the

distribution system.

b. In order to insure long product life, oxygen

sources should be eliminated. This can be

accomplished by taking the following measures:

i. Repairing system leaks to eliminate the need

for addition of make-up water.

ii. Eliminating open tanks from the system.

iii. Eliminating and/or repairing ttings which

allow oxygen absorption.

iv. Use of non-permeable materials in the

distribution system.

v. Isolating the boiler from the system water by

installing a heat exchanger.

See Section VI, Paragraph B for additional details.