Rinnai Q Premier QP85N Instructions D'installation Et D'entretien page 21

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NOTICE
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NOTICE
Installed pressure relief valve and T/P gauge on the side
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NOTICE
Internal boiler drain connection
fi gure 10
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NOTICE
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NOTICE
The factory supplied pressure relief valve and temperature and pressure gauge
must be installed before any shut-off valves.
The pressure relief valve and the temperature and pressure gauge must be
installed in as shown in fi gures 9a and 9b.
fi gure 9a
To protect the entire heating system we recommend installing a dirt particle trap
in the return circuit. When the boiler is installed to an existing heating system
this trap is required. Use of a Y strainer is not permitted as a substitute for a
dirt trap.
- Install shut-off valves immediately before and after the dirt particle fi lter to allow
the trap to be cleaned.
- Figure 10 is the location of a garden hose thread boiler drain that can be used to
drain the boiler or add water treatment additives to the system such as inhibitors
or glycol.
- For information on locating an additional expansion tank and system fi ll, please
see the Rinnai Boiler Applications Manual.
Thoroughly fl ush all pipes and radiators. We recommend the use of a Rinnai
approved system cleaner. Please refer to the list of approved Rinnai system
cleaners in this chapter.
- Refer to the installation template and chapter 5.3 for the pipe connection
dimensions.
To ensure the correct heat transfer the system piping must be sized correctly. The
piping should be increased in size upon exiting the boiler at the end of the prebend
kits to properly suit the system. Table 5 provided shows the correct piping sizes
based on the maximum fl ow rate for piping and system Delta T.
Upon exiting of the boiler cabinet all external piping must be properly supported.
The boiler and internal boiler piping are not intended to support the system
piping.
Pipe size Maximum
flow rate
(gpm)
1" 8
1 ¼" 14
1 ½" 22
Pipe size and related fl ow rate
Installed pressure relief valve and T/P gauge on the top
10°F T 20° T 30°F T
(btus) (btus)
40,000 80,000 120,000
70,000 140,000 210,000
110,000 220,000 330,000
40°F T
(btus) (btus)
160,000
280,000
440,000
table 5
fi gure 9b
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