2 | EG, PEG, EGH |
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Piping connections
Pipe before installing controls. Connect return piping after jacket is attached. Connect supply piping before or after jacket is attached.
Failure to properly pipe the boiler may result in improper operation and damage to the boiler or building.
Forced hot water boilers and gravity hot water boilers
1.To protect:
•radiant panels, plaster, etc. from high temperature water supplied from boiler, or
•boiler from condensation caused by low temperature water returned from system.
2.To protect boiler from condensation formed by low water temperature returned from large water content converted gravity systems, etc., see Figure 4, page 6.
Refer to tables and Figures 11a and 11b.
1.Circulator must be selected and sized according to the design requirements of the system. Size expansion tank to handle the volume of water in the system.
2.Small expansion tanks cause system water to be lost from relief valve.
Figure 11a Recommended piping connections forced hot water boilers with closed type expansion tanks
through fill valve. Eventual section failure can result. Expansion tank installation:
a)Closed type expansion tank - connect from the 3/4" N.P.T. tapping on left end section to expansion tank using 3/4" N.P.T. piping. Any horizontal piping must pitch upward toward tank at least 1 inch per 5 feet of piping.
b)Diaphragm type expansion tank - may be located anywhere in the system, preferably near the boiler. Install automatic air vent as shown in Figure 11b.
3.Install water relief valve vertically in“E” tapping.
Relief valve discharge piping must be piped near floor close to floor drain to eliminate potential of severe burns. Do not pipe to any area where freezing could occur. Do not plug, valve or place any obstruction in discharge line.
4.Connect system return piping to left end for EG - right or left for EGH. Supply and return must be on same end of EGH boiler, for proper flow and disposition of water throughout the sections.
5.Installer must provide drain cock(s).
6.Connect cold water fill supply piping close to boiler.
7.Plug all unused tappings.
Figure 11b Recommended piping connections forced hot water boilers with diaphragm type expansion tanks
Part Number | 9 |
