Infinity REU-V1616W / REU-V1620W / REU-V2018W / REU-V2020W- 10 - Issue 2 - 21/03/06 ©Rinnai
5. Smartstart
At least one temperature controller model MC-91Q must be used in conjunction with the water heater and
the Smartstart® system. Alternatively, if Temperature Controllers cannot be used a manual activation
switch is available. See separate service manual.
The installation of the water heater and temperature controllers must be performed in accordance with the
installation instructions supplied with the water heater.
The Smartstart® system is designed for domestic installations. However, it may be suitable for certain non
domestic installations. See separate service manual for more information.
Principle of operation (Fig.2)
The "Smartstart®" system heats the water in the pipework water connected between the water heater and
the hot water outlets before any outlets are opened using the 'flow and return' pipework principle. This
results in water savings and reduced waiting time for heated water delivery from the outlet when opened.
Traditional 'flow and return' systems usually keep the water in the pipework heated continuously. The
Smartstart® system however, only heats the water before the outlet is opened. This results in significant
energy savings because water is not heated unnecessarily whilst retaining the benefits of traditional flow
and return systems.
A schematic of the Smartstart® system installed in conjunction with a Rinnai continuous flow water heater
and temperature controller is shown in Fig.2 below.
H
O
T
C
O
L
D
G
A
S
Cold Inlet Mains
Smartstart®
Module
Rinnai Continuous
Flow Water Heater
Hot Water
Outlet
Hot Water
Outlet
Fig.2
Heating Loop Flow
Heating Loop Return
One or more
MC-91Q
Controllers
Preheat Button
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