Rheem RS120-64BP Use & Care Manual page 20

COLLECTOR PLUMBING - VERTICAL MOUNT
We recommend the use of a 115 volt differential
control with a factory installed six foot line cord. The
installation requires one 115 volt outlet to be installed
near the solar storage tank. Plug the control into the
outlet. The circulation pump line cord is plugged into
the receptacle on the side of the controller. A 230 volt
control and circulation pump may be substituted, but
troubleshooting the components in the future becomes
more difficult.
20
4.11 Charging the System
WARNING: Under no circumstances can any
!
fluid other than Dowfrost HD be used, alternate
fluids could be hazardous to your health.
Once the components are plumbed you are ready to
fill the solar storage tank with water and to charge
the collector loop with a mixture of heat transfer fluid
(HTF) and distilled or deionized water. The use of
fig.14