Boiler Expansion Tank; Underfl Oor Heating System (Plastic Pipes) - Rinnai Q85SN Installation & Servicing Instructions Manual

6.2

Boiler expansion tank

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NOTICE
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NOTICE
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NOTICE
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NOTICE
6.3 Underfl oor heating system (plastic pipes)
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NOTICE
An expansion tank must be part of the central heating system. The expansion tank
must be appropriate to the water content of the installation. The pre-charge pressure
depends on the installation height above the mounted expansion tank. The expansion
tank is NOT a part of the delivery and should be sourced locally. Please refer to the
expansion tank manufacturer for further information. The Combi boiler Q175C is
equipped with an expansion tank connection. This pipe is connected with the three
way valve and boiler pump.
Fill expansion tank to a minimum of 14.5 psi.
For the boiler to function correctly, it is necessary to connect the expansion
tank to the expansion tank connection on the boiler. If the expansion tank is not
connected to the supplied connection damage to the boiler may occur.
Note:
The solo boilers Q85S, Q130S, Q175S and Q205S can be provided with an optional
internal three way valve. When this valve is installed in the boiler, the boiler is provided
with an expansion tank connection.
and boiler pump.
For the boiler to function correctly, it is necessary to connect the expansion
tank to the expansion tank connection on the boiler. If the expansion tank is not
connected to the supplied connection damage to the boiler may occur.
See the Rinnai Boiler Applications Manual for further information regarding placement
of the expansion tank in the system. See the Rinnai 3-way valve indirect tank
installation manual for further information regarding the installation of the 3-way valve
indirect tank kit.
The boiler cannot be used with an open type expansion tank.
When using oxygen-permeable pipes, e. g. for fl oor heating systems, you must
separate the system using plate heat exchangers.
No recourse can be made to the terms of the limited warranty in the event of
failure to observe the regulations pertaining to plastic underfl oor heating pipes.
This pipe is connected with the three way valve
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