PEERLESS MI SERIES - Boiler Supply and Return; Water Piping and Controls

3. WATER PIPING AND CONTROLS
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1. Size the supply and return to suit the system. A
t_pical piping arrangement is shown in Figure 5.
Refer also to the I-B-R Installation Guide No. 200
and the Peerless Water Survey for additional
guidance during water piping installation.
2. Return Piping:
a. For boilers equipped with a factory mounted
circulator, pipe the return to the inlet connection
of the circulator.
b. For boilers equipped with a separate, unmounted
circulator, pipe the outlet connection of the
circulator to a tee, provided with a drain valve, at
the 1-1/4 NPT return tapping near the bottom of
the left section. Pipe the return to the inlet
connection of the circulator.
3
4.
5.
Supply Piping:
Pipe the supply to the I i/2 NPT supply tapping at
the top and rear of the boiler.
When system return water temperature will be below
130°E pipe the boiler with a bypass arrangement to
blend the system return and hot supply to obtain at
least 130°F entering the boiler. For more information
on bypass piping, consult the Peerless Water Survey.
If desired, install the circulator in the alternate
location shown in Figure 5. Consult the Peerless
Water Survey for more information on circulator
location.
COLD
WATER
FILL
VAL VE
DRAIN
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TO
DRAIN
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Figure 5: Supply and Return Piping