Install Water Boiler Controls - Weil-McLain 80 Manual

Weil-McLain 80 Boiler For Gas, Light Oil, Gas/Light Oil Fired Burners
11

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:
• – set according to design requirements.
Low
• High – at least 20° higher than low limit, 240°F
maximum.
6. Install optional controls per control manufacturer's
instructions.
Figure 27
Water control locations
28
Table 11
Water control tappings (see Figure 27)
Part No. 550-141-935/0602