PFG Series 7 Gas-fired Water Boiler — Boiler Manual

Bypass piping

Bypass piping is not normally required on any baseboard system.

Bypass piping should be used for the following instal- lations. (Bypass, supply, and return piping should be same size.)

1.Use the piping shown in Figure 3 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.Use the piping shown in Figure 4 to protect boiler from condensation formed by low water temperature returned from large water content converted gravity systems, etc.

Figure 3

Figure 4

Part Number 550-110-641/0605

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Weil-McLain PFG-7 manual Bypass piping