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Part number 550-101-232/0703
10
GAS-FIRED WATER BOILER — Installation Manual — Multiple-boiler Systems
Figure 9 Typical piping for multiple Ultra boilers, using Weil-McLain Easy-Fit
®
Manifolds
Easy-Fit
®
Piping (continued)
1 Flow/check valve (each boiler)
2 Isolation valves (when used)
3 Caps
4 Easy-Fit
®
Manifold (supply), sized per Fig. 6
or Fig. 7, page 8
5 Easy-Fit
®
Manifold (return), sized per Fig. 6
or Fig. 7, page 8
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