Weil-McLain 80 manual Install steam boiler controls, Install controls where shown in and Figure

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12 Install steam boiler controls

Install controls: Table 12 Steam control tappings (see Figure 28)

1. Install controls where shown in Table 12 and Figure 28.

Failure to properly install, pipe and wire boiler controls can result in severe damage to boiler, building and personnel; and is not covered by boiler warranty.

a. Install steam pressure operating and high limit controls and pressure gauge. See Figure 28,this page, and Figure 29, page 30.

Pressure limit control settings:

• Low – set according to design requirements.

•High – set at least 2 psi higher than low limit,

15 psi maximum.

b. Relief valve must be installed with spindle in vertical position. Use fittings provided with boiler. Do not make any other connection in that piping.

Pipe relief valve discharge through vertical piping to atmosphere. Use rigid material suitable for 375°F, threaded one end only. Install drain pan elbow to drain condensate. Pipe near floor close to floor drain to eliminate potential of severe burns. Do not pipe to any area where freezing could occur. Do not plug, valve or place any obstruction in discharge line.

c. Install water level controls and gauge glass as shown in Figure 30 and Table 13, page 30.

1. Fittings for controls to be furnished by others.

2. If water level control is not shown in Table 13, page 30, locate casting mark on control and install per manufacturer’s instructions.

Do not use water level controls with quick hook-up fittings. Nuisance shutdowns will occur.

Figure 28 Steam control locations

Part No. 550-141-935/0602 29