External Domestic Hot Water Tanks; Electrical Connections - Rinnai Q85SN Installation & Servicing Instructions Manual

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External domestic hot water tanks

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WARNING
804000013
804000014
3 way valve conversion kit
fi gure 26
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NOTICE
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NOTICE
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NOTICE
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NOTICE
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NOTICE
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Electrical connections

Note the local codes for requirements for connecting an external hot water
cylinder to the boiler. The installation must comply to these codes.
Depending on the domestic hot water requirements and comfort preferences various
external hot water tanks can be connected to the boiler.
Connecting an external hot water tank to the Q175C is NOT possible.
Connecting an external hot water tank to the Q-Series solo boilers can be done in
2 ways:
1. For Q85S, Q130S, Q175S, Q205S:
Using an optional three-way valve installed in the return line under the boiler between
boiler and plumbing kit and directly controlled by the boiler control. For the Q-Series
Solo boilers a special internal three-way valve conversion kit is available (fi g. 26).
- Part.no. 804000013: For the Q85S and Q130S
- Part.no. 804000014: For the Q175S and Q205S
2. For Q85S, Q130S, Q175S, Q205S :
An external hot water tank connected on the secondary side of the plumbing kit,
seperately controlled by another device.
The capacity of the boiler must be defi ned by the installer.
The choice of the tank depends on the coil output.
The coil output of the tank must comply with the boiler output.
For the Q85S or Q130S the minimum coil output must be 85,000 BTU/hr. This to
prevent the boiler for short cycling.
The Q175S and the Q205S have limited outputs with the 3 way valve kit. Both
boilers are limited to 130,000 BTU/hr for the DHW output when using the 3 way
valve kit. Please take this into account when sizing the indirect hot water tank.
For additional information on piping and control of indirect tanks, please see
the Rinnai Boiler Applications Manual.
For additional information on the Rinnai 3-way valve indirect tank kit, please
see the installation manual for the kit.
Rinnai recommends the use of a thermostatic mixing valve on all indirect tanks
used with Q boilers on the domestic hot water side to prevent scalding. This
valve will regulate the water temperature leaving the indirect tank.
The electrical connections to the boiler must be electrically grounded in accordance
with all applicable local codes and the latest revision of the National Electrical Code,
ANSI/NFPA-70. Installations should also conform with CSA C22.1 Canadian Electrical
Code Part 1 if installed in Canada.
Devices such as, outdoor sensor, room thermostat or temperature control, 3-way
valve (except Q175CN/Q175CP), temperature sensor or thermostat and an external
pump are all connected to the internal connection terminal. The connection terminal
is situated in the Control Tower.
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