LAARS Heating Systems
Page 32
Check
Val
ve
Circu
lator
Pressure
Rel
ief
Valve
Expansi
on
Back-flow
Preventer
Tank
Full
-port
Ball Val
ve
Mixin
g
Valve
Gas
Domestic
Cold Water
Domestic
Hot Water
To
Fixtures
Circulator Requirement:
Refer to air handler
manufacturer
for proper sizing.
Air Handler
Expansion Tank suitable
for use on DHW.
Lead Free Bronze
or Stainless Steel
Condensate
M
C
H
C
H
G
NOTES: 1.
The thermal expansion tank must be suitable for
potable water and between the backflow preventer and the cold water inlet. 2. Drawings are for piping reference only
. The installer is
responsi
ble for all equipment and detailing required by
local codes. 3. In Massachuset
ts, a vacuum relief valve must be
installed per 248 CMR. 4. In Massachuset
ts, state plumbing code requires a
distance no greater than 50 feet from the water heater to the fail coiler in the air handler
.
6.
The air handler must be suitable for use with
Domestic Hot W
ater
.
5. In Massachuset
ts, state plumbing code requires an
electronically timed circulator pump to activate every six hours for 60 seconds.
Circulator pump must be lead free
bronze or stainless steel.
Auto Fill Valve
and Backflow Preventer Valves are NOT
included (Field Supplied).
CAUTION
Scalding Risk: Manufacturer
strongly recommends the
use of an anti-scald mixing
valve at domestic hot water
outlet (boiler location) to
reduce potential for scalding.
Contact Manufacturer for
recommended models.
Check with local codes.
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