LP-179 Rev. 6.7.16
17
Figure 8 - Piping with Air Handler on Side
NOTES:
1. Minimum pipe size should match connection size. Upsize pipe
accordingly if greater ow is required.
2. A thermal expansion tank suitable for potable water must
be sized and installed within this piping system between the
backow preventer and the cold water inlet.
3. All circulators should have an integral ow check.
4. Drains and check valve between unit and storage tank will
assist in purging air from system.
5. These drawings are meant to demonstrate system piping
only. The installer is responsible for all equipment and detailing
required by local codes. In Massachusetts, you must install a
vacuum relief valve per 248 CMR.
6. Mixing valve application is optional, but recommended to
help prevent scalding.
7. Always shut o power to the water heater or isolate the heater
from the system if ANY plumbing work is to be done. Running
the water heater without water will result in dry-ring.
NOTES FOR AIR HANDLER APPLICATION:
1. MASSACHUSETTS STATE PLUMBING CODE
REQUIRES A DISTANCE NO GREATER THAN 50 FEET
FROM THE WATER HEATER 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 ONLY. THE INSTALLER IS RESPONSIBLE FOR ALL
EQUIPMENT AND DETAILING REQUIRED BY LOCAL CODES.
The piping will not support the weight of the water heater 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.
An ASSE 1017 thermostatic mixing valve MUST be installed when using outdoor reset. Failure to do so could result in substantial
property damage, serious injury, or death.
Figure 9 - Piping with Air Handlers
To Next Page
Loading...
Need help?
General
