Installation Manual

whl-007 Rev. 1.14.15
9
I. Applications
INDIRECT
Figure 4 - Zoning with Zone Valves Figure 5 - Zoning with Circulators
Figure 6 - Typical Expansion Tank Application with Auxiliary Line
PIPING NOTES:
The following notes are applicable to all of
the piping applications demonstrated on
this page.
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
backow 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. This drawing is 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.
See Part 3 for more information.