Weil-McLain WM97+100 Manual page 61

WM97+ Series 2
Multiple boiler installations
Piping schematic — typical piping for multiple WM97+ boilers, using Weil-McLain Easy-Fit manifolds (shown
using WM97+155 boilers — adjust boiler connections as required for other boiler models)
Flow/check valve (integral to each boiler internal circulator).
Isolation valves (when used).
Cap.
Easy-Fit® Manifold (supply) — layout and size per page 60.
Easy-Fit® Manifold (return) — layout and size per page 60.
Primary circulator.
Expansion tank (diaphragm type).
System air eliminator.
System automatic air vent.
Pressure reducing valve.
Check valve or backflow preventer, as required by applicable codes.
Part number 550-142-204/0117
-
GAS FIRED WATER BOILER
for multiple boiler installations piped as shown in this manual. This allows the
boiler internal circulator to circulator water to and from the manifolds.
— Boiler Manual
(continued)
Isolation valve.
Cold water supply.
Supply water temperature control (when used).
Low water cutoff (when used) (place above primary header).
Water flow switch (when used).
Internal boiler circulator.
System supply.
System return.
Boiler P/T gauge, relief valve and discharge piping, installed per
WM97+ Boiler Manual.
DHW connections — pipe with drain valve and cap as shown
on page 14 if boiler is not directly connected to a DHW unit. For
Aqua Logic (CWH) installations, refer to the Aqua Logic (CWH)
manual for piping the Aqua Logic (CWH) to the WM97+ boiler
bottom connections.
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