Bypass Piping - Weil-McLain PFG 7 Series Installation & Operation Manual

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Bypass piping

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.
. 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.
8
- W B
Fired ater oiler
Bypass piping is not normally required on
any baseboard system.
— B M
oiler anual
Figure 3
Figure 4
Part Number 550-110-641/0605