Weil-McLain 80 - Manual (Page 28)

Weil-McLain 80 Boiler For Gas, Light Oil, Gas/Light Oil Fired Burners
28 Part No. 550-141-935/0602
Install water boiler controls
Install controls:
1. Install furnished controls where shown in Table 11 and
Figure 27.
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.
2. Relief valve must be installed with spindle in vertical
position. Use fittings provided with boiler. Do not make
any other connection in that piping.
Relief valve discharge line must be piped
using rigid material suitable for 375°F,
threaded one end, near floor close to 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.
3. When installing low water cuttoff
a. Must be installed if boiler is located above radiation
level.
b. May be required on water boilers by certain state,
local or territorial codes or insurance companies.
c. Install low water cutoff designed for water
installations where shown in Table 11 and Figure 27.
4. If installation is to comply with ASME installation
requirements, an additional high temperature limit is
needed. Purchase and install in supply line between
boiler and isolation valve or in tapping “A.”
5. Dual limit control settings:
• Low – set according to design requirements.
• High – at least 20° higher than low limit, 240°F
maximum.
6. Install optional controls per control manufacturer’s
instructions.
11
Table 11 Water control tappings (see Figure 27)
Figure 27 Water control locations