P.13
Low voltage wire shall be rated for the full
range of temperatures expected in the location,
typically wire is rated up to 160°F. The low
voltage sensor wire must not be in direct contact
with the pipe as the wire insulation may melt
when in contact with a hot pipe. Low voltage
sensor wire must be run OUTSIDE the pipe
insulation. Where the low voltage wire is run in
an exposed location, it should be run OUTSIDE
the pipe insulation but UNDER the insulation
jacket or wrap to protect the wire from UV
exposure.
4.7 Installing the Solar Tank
The solar tank is heated indirectly through a
coiled heat exchanger that is integral to the tank.
The heat exchanger is immersed in the solar
storage tank.
In plumbing the solar storage tank and expan-
sion tank make sure that all the components are
accessible and easy to reach. Provide for clear
access to the storage tank, pump, expansion
tank, mixing valve and other key components.
If a component in the potable water side of the
system may require future service or mainte-
nance make the connections with brass unions
or other approved methods. Use only brass,
copper and stainless steel fittings in plumbing
the solar storage tank and expansion tank. The
use of galvanized fittings, CPVC, PVC or other
REXRACK
(FOR MULTIPLE COLLECTORS WITH PORTRAIT TILT)
fig. 11
