III. Water Piping and Trim

WARNING

Failure to properly pipe boiler may result in improper operation and damage to boiler or structure.

Oxygen contamination of boiler water will cause corrosion of iron and steel boiler components, and can lead to boiler failure. Burnham’s Standard Warranty does not cover problems caused by oxygen contamination of boiler water or scale (lime) build-up caused by frequent addition of water.

A.Design a piping system and install boiler which will prevent oxygen contamination of boiler water and frequent water additions.

1.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.

2.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.

WARNING

System supply and return piping must be connected to correct boiler pipe.

Burnham recommends sizing the system circulator to supply sufficient flow (GPM) to allow a 20°F temperature differential in the system. When sizing the system circulator, the pressure drop of all radiators, baseboard and radiant tubing and all connecting piping must be considered.

3.Connect System supply and return piping to boiler. See Figures 8 and 9. Also, consult I=B=R Installation and Piping Guides. Maintain minimum ½ inch clearance from hot water piping to combustible materials.

a.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 7. Also, consult I=B=R Installation and Piping Guides.

Figure 7: Recommended Piping for Combination

Heating and Cooling (Refrigeration) System

b.If this boiler is connected to heating coils located in air handling units where they may be exposed to refrigerated air, the boiler piping must be equipped with flow control valves to prevent gravity circulation of boiler water during the operation of the cooling system.

c.If boiler is used with an Alliance™ Indirect-Fired Domestic Water Heater, install the Alliance™ as a separate heating zone. Refer to the Alliance™ Installation, Operating, and Service Instructions for additional information.

d.Use a system bypass 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 bypass should be the same size as the supply and return lines with valves located in the bypass

RSA specifications

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Burnham RSA manual III. Water Piping and Trim

Models: RSA