LP-314 Rev. 012 Rel. 003 Date 9.27.19
19
Figure 11 - Piping with Zone Circulators
NOTES:
1. Minimum pipe size should
match connection size
on appliance. Upsize pipe
accordingly if greater flow is
required.
2. A thermal expansion tank
suitable for potable water
must be sized and installed
within the piping system
between the check valve
and cold water inlet of the
appliance.
3. Gas line must be rated to
the maximum capacity of the
unit. Unit must have 10 feet
of pipe after gas regulator.
4. All circulators shall have an
integral flow check.
NOTES FOR AIR HANDLER
APPLICATION (APPLIES TO
DOMESTIC WATER OUTLET
CONNECTIONS ONLY):
1. MASSACHUSETTS STATE
PLUMBING CODE REQUIRES
A DISTANCE NO GREATER
THAN 50 FEET FROM THE
APPLIANCE TO THE FAN COIL
IN THE AIR HANDLER.
2. MASSACHUSETTS STATE
PLUMBING CODE REQUIRES
AN ELECTRONICALLY TIMED
CIRCULATOR PUMP TO
ACTIVATE EVERY SIX HOURS
FOR 60 SECONDS. THIS
CIRCULATOR IS REQUIRED TO
BE BRONZE OR STAINLESS.
3. ALL WATER PIPING MUST
BE INSULATED.
4. YOU MUST INSTALL A
VACUUM RELIEF VALVE PER
248 CMR.
NOTE: THIS DRAWING IS
MEANT TO DEMONSTRATE
SYSTEM PIPING CONCEPT
ONLY. THE INSTALLER
IS RESPONSIBLE FOR
ALL EQUIPMENT AND
DETAILING REQUIRED BY
LOCAL CODES.
The piping will not support the weight of the appliance circulator pump. Refer to the pump manufacturer’s installation instructions to
properly support the circulator pump. Failure to comply with these instructions could result in substantial property damage, severe personal
injury, or death.
DO NOT use the heat pack for high temperature (over 160
o
F) applications. Failure to comply will result in substantial overworking of the
appliance, and possibly lead to early appliance failure. Use of the heat pack for high temperature applications WILL VOID the warranty.
Figure 12 - Piping with Recirculation
CAUTION