Rinnai Q130SN - Manuel (Page 41)

Installation & Servicing Instructions Rinnai Q-Series
41
7 External domestic hot water tanks
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
Q85S, Q130S, Q175S and Q205S a special internal three-way valve kit is available.
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 defined 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 addtional information on piping and control of indirect tanks, please see
the Rinnai Boiler Applications Manual.
For addtional information on the Rinnai 3-way valve indirect tank kit, please
see the installation manual for the kit.
NOTICE
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NOTICE
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NOTICE
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NOTICE
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