Rheem RS80-42BP - Manual (Page 18)

18
Installing the water heater.
Types of Roof Installation
Installation types are divided into the
following:
Standard Installation:
The system is mounted to wood or
Unistrut runners directly to the roof
with no need for pitch or directional
changes.
Metal / Sturdy Tile Installation:
The system is mounted directly to the
roof with no need for pitch or
directional changes.
Frame Installation
(Side, Reverse, Shallow-Pitch and
Flat-Roof Installation)
The system is mounted on a variable
pitch frame to provide pitch or a fixed
pitch frame to provide directional
changes.
This section contains instructions for correct installation of the system. Complete the procedures in the
order listed.
NOTICE: Installation
of roof supports,
plumbing, and
electrical components
must conform to local
codes.
Plumbing System Schematic for Installation as Pre Heater
3/4”
3/4”
Collector
M = Mixing Valve
T/P = Temperature & Pressure Relief
T/P
Collector
Valve Settings:
Solar Only = (TWV1-1) + (TWV2-1) + (Pre Heat OFF)
Storage Only = (TWV1-2) + (TWV2-2) + (Pre Heat OFF)
Solar Pre Heat = (TWV1-1) + (TWV2-2) + (Pre Heat ON)
TWV1 = Two Way Valve - 1 Inlet Selector
TWV2 = Two Way Valve - 1 Outlet Selector
Pre Heat = Solar Pre Heat Valve
Notice: All pipe work 3/4” unless
otherwise stated.