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f. Boiler Drain Valve - Install with a 3” x ¾” bushing into one of the two return tappings “B”. The drain valve
may also be installed in the return piping, but it must be installed in the leg of a tee so that it is directly opposite
and as close as possible to the return tapping. The leg of the tee must be at least 1½” pipe size.
A bottom blowoff using a valve must also be connected to one of the return tappings (B). The ¾” Drain Valve
maybe used for a bottom blowoff for the boiler model 32-570 or smaller boilers. Bottom blowoff piping and
valves for the boiler models 32-665 through the 32-1520 must be at least 1”. Bottom blowoff piping and valves
for the boiler models 32-1615 through the 32-2850 must be at least 1¼”.
g. Install the “Lowest Permissible Water Level Plate” using the holes provided in the jacket panel near the
LWCO.
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Figure 23: Pressuretrol / Gauge Installation
Figure 24: CG450 Installation