Install Steam Boiler Controls - Weil-McLain 80 Manual

• Installation
12

Install steam boiler controls

Install controls:
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.
• – set at least 2 psi higher than low limit,
High
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
• Start-Up • Maintenance
Table 12
• Parts
Steam control tappings (see Figure 28)
29