Central Heating System - Rinnai Q Premier QP85N Instructions D'installation Et D'entretien

6.1 Central heating system

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NOTICE
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NOTICE
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NOTICE
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NOTICE
6.1.1 Pre-bend Kit and Installation
Connect the central heating system according to its instructions.
The boiler pipes can be connected to the installation by means of NPT fi ttings.
When removing the plastic sealing caps from the pipes, testing water may drain
from the boiler.
A low loss header is pre-installed in the boiler. The low loss header not provided
with service valves. Service valves must be installed on the supply and return
connection pipes of the boiler. Dielectric unions are not provided with the boiler.
Dielectric unions must be installed on the supply and return connection pipes
of the boiler.
The boiler, when used in connection with a refrigeration system, must be
installed so the chilled medium is piped in parallel with the boiler with appropriate
valves to prevent the chilled medium from entering the boiler.
The boiler piping system of a hot water boiler connected to heating coils located
in air handling units where they may be exposed to refrigerated air circulation
must be equipped with fl ow control valves or other automatic means to prevent
gravity circulation of the boiler water during the cooling cycle.
Rinnai provides 3 Pre-bend Plumbing Kit options; top, right side, and left side. One
of these options must be selected at the time of purchase. The pre-bend kit must be
fi tted directly in the back of the boiler on the heating water supply pipe, heating water
return pipe, domestic cold water pipe, domestic hot water pipe, domestic recirculation
water pipe, and the gas pipe.
When installing these pre-bend pipes care must be taken. Ensure that the fi rst two
ribs on the threaded fi tting at the end of the pre-bend pipe are visible on the outside
of the boiler; this will provide enough surface area to correctly use a backing wrench.
Always using a backing wrench to ensure that the pipe is not damaged during instal-
lation, see fi gure 7a and 7b for the correct position of the backing wrench. Always
use a backing wrench when attaching pipes and fi ttings to the boiler. If a backing
wrench is not used damage to the boiler piping might occur.
Failure to properly use a backing wrench could result in damage or broken pipes
in the boilers. Damage to the boiler and piping caused by incorrect installation
is not covered by the warranty.
fi gure 7a fi gure 7b
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