Weil-McLain Ultra Manual page 28

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gas fired water boiler
Multiple boiler water piping
Figure 29
Piping layout — typical piping for multiple Ultra boilers, using isolation exchanger
1 Flow/check valve (each boiler)
2 Isolation valves (when used)
3 Cap
4 Easy-Fit® Manifold (supply) — layout
and size per page 24
5 Easy-Fit® Manifold (return) — layout
and size per page 24
6a Heating system circulator (exchanger
tube-side)
6b Heat exchanger shell-side circulator
7 Expansion tanks (diaphragm type)
8 System air eliminator
28
— Boiler Manual
Legend — Figure 29
9 System automatic air vent
13 Cold water supply connections
17 Boiler circulator (each boiler)
18 Heating system supply
19 Heating system return
20 Boiler relief valve and discharge piping,
installed per Ultra Boiler Manual
30 Strap system supply and return sensors to
lines as shown, at least 6 pipe diameters (but
no more than 3 feet) from boiler connec-
tion tees. For pipe sizes larger than 3-inch,
contact Weil-McLain for well-mounted
sensors.
(continued)
2. Systems exposed to untreated
3. Old systems severely contami-
4. Process applications.
5. Commercial service water ap-
6. High water pressure applications,
Notes:
1. Contact heat exchanger manufacturer for heat exchanger
shell-side and tube-side piping and circulator require-
ments. Tube-side flow and temperatures must meet
heating system requirements.
2. Contact heat exchanger manufacturer for sizing heat
exchanger.
3. Heat exchanger shell-side circuit requires its own expan-
sion tank as shown.
4. Heating system circuit requires its own expansion tank,
as shown, plus its own relief valve set to protect heating
system and heat exchanger piping and components.
5. When individual isolation valves are used, individual
boiler and level controls may be required.
Use isolation heat
exchanger for:
1. Large volume systems with high
mineral content in water.
quantities of makeup water.
nated with scale and rust buildup
inside piping and heat distribu-
tion units.
plications.
requiring pressure relief setting
in heating system more than 30
PSIG (tall buildings). See notes
below.
Part number 550-100-066/0608