Burnham V8 Series Instructions.pdf - Heating Help

SECTION IV: WATER BOILER PIPING AND TRIMNOTICEFailure to pipe boiler as specified influctuations and water carry over.thismanual mayresult inexcessivesystem noise, water lineA. EVALUATE THE EXISTING WATERSYSTEM.Design a piping system and install boiler which willprevent oxygen contamination of boiler water andfrequent water additions.1. There are many possible causes of oxygencontamination such as:a. Addition of excessive make-up water as a resultof system leaks.b. Absorption through open tanks and fittings.c. Oxygen permeable materials in the distributionsystem.2. In order to insure long product life, oxygen sourcesmust be eliminated. This can be accomplished bytaking the following measures:a. Repairing system leaks to eliminate the need foraddition of make-up water.b. Eliminating open tanks from the system.c. Eliminating and/or repairing fittings which allowoxygen absorption.d. Use of non-permeable materials in thedistribution system.e. Isolating the boiler from the system water byinstalling a heat exchanger.WARNINGSystem supply and return piping mustbe connected to correct boiler pipe.Burnham recommends sizing thesystem circulator to supply sufficientflow (GPM) to allow a 20°F temperaturedifferential in the system. When sizingthe system circulator, the pressuredrop of all radiators, baseboard andradiant tubing and all connectingpiping must be considered.CAUTIONMaintain minimum ½ inch clearance fromhot water piping to combustible materials.B. CONNECT SYSTEM SUPPLY AND RETURNPIPING TO BOILER. See Figures 13A, 13B and13C. Also, consult I=B=R Installation and PipingGuides.1. If this boiler is used in connection with refrigerationsystems, the boiler must be installed so that thechilled medium is piped in parallel with the heatingboiler using appropriate valves to prevent the chilledmedium from entering the boiler. See Figure 12.Also, consult I=B=R Installation and Piping Guides.2. If this boiler is connected to heating coils located inair handling units where they may be exposed torefrigerated air, the boiler piping must be equippedwith flow control valves to prevent gravitycirculation of boiler water during the operation ofthe cooling system.3. If boiler is used with an Alliance Indirect-FiredDomestic Water Heater, install the Alliance as aseparate heating zone. Refer to the AllianceInstallation, Operating, and Service Instructions foradditional information.4. Use a boiler bypass if the boiler is to be operated ina system which has a large volume or excessiveradiation where low boiler water temperatures maybe encountered (i.e. converted gravity circulationsystem, etc.) The bypass should be the same size asthe supply and return lines with valves located in thebypass and return line as illustrated in Figures 13A,13B and 13C in order to regulate water flow formaintenance of higher boiler water temperature.WARNINGThe use of a low water cut-off device, whilenot required unless radiation level is belowthe boiler, is highly recommended.24