Recirculation Control - Rheem RTGH-95XLP-2 Use And Care Manual

Recirculation Control

Local codes or plumbing authority requirements may
vary from the instructions or diagrams provided in this
manual and take precedence over these instructions.
Your tankless water heater has the ability to control an
external recirculation pump. Two modes are available,
Energy Saver and Performance, which recirculate the
water in the plumbing system to provide hot water more
quickly when a faucet is opened. Rheem offers a fully
packaged recirculation pump kit. See the Parts and
Accessories catalog for more information.
NOTICE:
Recirculation control is for residential application only.
Recirculation control cannot be used with an air handler
or with multiple water heater installations. The maximum
temperature setting is 140°F (60°C) in recirculation control.
Typical Recirculating Pump Installation
Remote
Control
Hot Water
to Fixtures
Hot Water
Loop
Dedicated
Return Line
3
INSTALLATION INSTRUCTIONS
Tankless
Water Heater
Single Unit
Cold water
to Tankless
(Copper Pipe)
Circulation
Pump with built
in check valve
Optional Shut
off valve
(Copper Pipe)
Pump Requirements
Voltage: 120V, 60Hz
In-rush current: Less than 2.5 amps
Amperage: less than 2.0 amps
WARNING:
A control board can be damaged if amperage exceeds 2.0
amps.
Pump Size
The pump should be sized for about 2.5 gpm at the
pressure drop through the tankless water heater and
the supply and return plumbing in the recirculation loop.
Contact service department listed on page 26 of this
use and care manual if you need more information.
Check
Valve
Wire to Connect
Pump to heater
(8 ft long)
Expansion
Tank
Shut off
Valve
Cold Water
Supply
65