Boiler Manual - Weil-McLain
Boiler Manual - Weil-McLain
Boiler Manual - Weil-McLain
Create successful ePaper yourself
Turn your PDF publications into a flip-book with our unique Google optimized e-Paper software.
GV90+ gas-fired water boiler — <strong>Boiler</strong> <strong>Manual</strong>Multiple boiler water piping (continued)Figure 33 Piping layout — typical for multiple GV90+ boilers, using <strong>Weil</strong>-<strong>McLain</strong> Easy-Fit manifolds (2-boiler system)1 Flow/check valve (each boiler)2 Isolation valves (when used)3 Caps4 Easy-Fit® Manifold (supply) — layout and size per page 245 Easy-Fit® Manifold (return) — layout and size per page 246 Primary circulator7 Expansion tank (diaphragm type)8 System air eliminator9 System automatic air vent16 Cold water fill line — see Figure 32, page 25 for typical componentsLegend — Figure 3317 3-way diverting valve (operated by DHW aquastat — valve endswitch connects across boiler thermostat terminals)18 System supply19 System return20 <strong>Boiler</strong> relief valve and discharge piping, installed per GV90+<strong>Boiler</strong> <strong>Manual</strong>21 Indirect-fired storage water heaters — Example is shown connectedto one boiler of the system. The indirect water heater couldalso be connected with a secondary connection off the mainheader, as in Figure 34, page 27.26Part number 550-142-054/1211