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Note
Use this installation diagram when you:
install the water connections (see section 8.4)
install the condensate drain (see section 8.5)
install the gas connection (see section 8.6)
fill the water heater (see section 8.9.1)
drain the water heater (see section 8.10.2)
n
8.4 Water connections
8.4.1 Cold water connection
Install the cold water connection:
Install an approved stop valve (4), as required by the applicable regulations.
Install an approved pressure reducing valve (1) to prevent that the pressure in the
cold water supply pipe exceeds the maximum working pressure of the tank, 8 bar.
Refer to the Technical details (see section 13.1).
Install a non-return valve (5).
Install an expansion valve (15).
Connect the overflow connection of the expansion valve, to an open waste water
pipe.
Install an expansion vessel (16).
8.4.2 Hot water connection
Note
Insulate long hot water pipes to prevent unnecessary energy loss.
Install the hot water connection:
Install a stop valve (11) in the hot water outlet pipe for service reasons.
If applicable, install a temperature gauge (12).
Install a T&P valve (3).
8.4.3 Circulation connection
Install a circulation pump when an immediate flow of hot water at draw-off points is
required. This improves comfort and reduces water wastage.
Note
Use the special connection for the circulation pipe on the water heater for a more efficient
use of the water heater.
Note
Make sure that the pump has the correct capacity for the length and resistance of the
circulation system.
Install a circulation pump:
Install a circulation pump (6).
Install a non-return valve (5) after the circulation pump to make sure that the
direction of circulation is guaranteed.
Install a stop valve (4) before the circulation pump.
Install a stop valve (4) after the non-return valve.
Connect the circulation pipe.
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40 Installation, Maintenance and Service part
40


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