Amtrol OWB Series User Manual
Page 21
d)
Remove the circulating pump from its carton in the crate and mount it to the
pump flange on the end of the return manifold.
2.
Bare Boiler:
a)
The pressure relief valve and temperature/pressure gauge are supplied with the
boiler and should be mounted as shown in Figure 13.
b)
The bare boiler does not include the return manifold. The installer must make up
his own manifold to connect to the 2 x 1 1/4 inch bushing which is supplied in the
boiler supply and return ports, and must provide his own boiler drain and
circulating pump.
1.
Accessories for Boilers OWB-35 and OWB-50:
Figure 14. Supply Manifold Assembly
Figure 15. Return Diffuser Installation
a) Attach supply manifold as shown in Figure 14.
b) Install return port diffuser and attach return flange as shown in Figure 15. Make
sure diffuser SLOTS face upward.
c) Screw threading used on these parts are metric. There is no english thread
equivalent to the nuts or studs supplied. Attempts to use any english threaded
stud in place of those supplied will damage the boiler block.
Installation, Operation, And Service Instructions
21