Demand Duo
™
H
-
Series Installation and Operation Manual
13
Carefully unpack your system package and verify
the following contents are included.
If any items are damaged or missing, contact
your local dealer/distributor or call Rinnai
Customer Care at 1
-
800
-
621
-
9419. Do not
attempt to use any item that appears damaged.
Items included with system:
•
Rinnai Demand Duo
™
Commercial Hybrid
Water Heating System
•
Temperature and Pressure Relief Valve
(pre
-
installed on tank)
•
Pressure Relief Valve (pre
-
installed on the
tankless water heater)
•
Installation and Operation Manual (this
manual)
•
Installation and Operation Manual for
Tankless Water Heater
•
2 in. PVC Vent Screens (x2) and Vent
Screen Screws
•
Gas Flex/Union
To avoid danger of
suffocation, keep
plastic bags away from babies, small children
and pets. Do not use these bags in cribs, beds,
carriages, or playpens. The bags are not a toy.
WARNING
•
Threading machine with heads and oiler
•
Core drill with diamond head
•
Torch set
•
Copper tubing cutter
•
Steel pipe cutter
•
Heat tape
•
5/8 in. ID PVC flexible tubing
•
Electrical wire
•
Concrete wall anchors
•
Optional pipe cover
•
PVC glue/cement and primer
•
2 conductor 22 AWG wire for controller
•
Single gang electrical box
•
Wire nuts
•
Unions and drain valves
•
Drain pan
•
Earthquake strap
When selecting an installation location, you must
ensure that clearances will be met and that the
vent length will be within required limits. Consider
the installation environment, water quality, and
need for freeze protection. Requirements for the
gas line, water lines, electrical connection, and
condensate disposal can be found in their
respective installation sections in this manual.
This section provides information on the
importance of water quality to the Rinnai
Tankless Water Heater. The information is
intended to serve as general guidelines only and
is not a complete list of water quality guidelines.
Consideration of care for your water heater
should include evaluation of water quality. The
water must be potable, free of corrosive chemi-
cals, sand, dirt, or other contaminants. It is up to
the installer to ensure the water does not
contain corrosive chemicals or elements that can
affect or damage the Rinnai Commercial Hybrid
Water Heating System. Water that contains
chemicals exceeding the levels below can dam-
age the Rinnai Tankless Water Heater. Replace-
ment of components due to water quality dam-
age is not covered by the warranty.
•
Pipe wrenches (x2)
•
Phillips Head screwdriver
•
Adjustable pliers
•
Wire cutters
•
Gloves
•
Safety glasses
•
Level
•
Soap or gas leak detector solution
•
Approved venting
•
Teflon tape (recommended) or pipe com-
pound
•
Pipe insulation
•
Hammer drill with concrete bits
•
Saw
