Installation Guide

Part number 550-100-066/0608
g a s -f i r e d w at e r b o i l e r — Boiler Manual
26
Multiple boiler water piping (continued)
Legend — Figure 27
1 Flow/check valve (each boiler)
2 Isolation valves (when used)
3 Caps
4 Easy-Fit® Manifold (supply) — layout and size per page 24
5 Easy-Fit® Manifold (return) — layout and size per page 24
6 Primary circulator
7 Expansion tank (diaphragm type)
8 System air eliminator
9 System automatic air vent
13 Cold water supply
17 Boiler circulator (each boiler)
18 System supply
19 System return
20 Boiler relief valve and discharge piping, installed per Ultra Boiler Manual
30 Strap system supply and return sensors to lines as shown, at least 6 pipe
diameters (but no more than 3 feet) from boiler connection tees. For pipe
sizes larger than 3-inch, contact Weil-McLain for well-mounted sensors.
Piping layout — typical piping for multiple Ultra boilers, using Weil-McLain Easy-Fit manifolds