PB Heat DE User Manual download pdf (Page 9)

A. BOILER SUPPLY AND RETURN

1. Size the supply and return to suit the system. A

typical piping arrangement is shown in Figure 3.1.

Refer also to the I=B=R Guide to Residential

Hydronic Heating Installation/Design and the PB

Heat, LLC Water Survey for additional guidance

during water piping installation.

2. Return Piping:

a. 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. Supply Piping:

Pipe the supply to the 1-1/2 NPT supply tapping at

the top of the boiler.

4. When system return water temperature will be below

130°F (54°C), pipe the boiler with a bypass

arrangement to blend the system return and hot

supply to obtain at least 130°F (54°C) entering the

boiler. For more information on bypass piping,

consult the PB Heat, LLC Water Survey.

5. If desired, install the circulator in the alternate

location shown in Figure 3.1. Consult the PB Heat,

LLC Water Survey for more information on

circulator location.

3. WATER PIPING AND CONTROLS

Figure 3.1: Supply and Return Piping

WATER PIPING AND CONTROLS

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PB Heat DE User Manual Page 9