A.O. Smith AH - 290, Installation, User And Service Manual

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3. Installation
3.1 Water connection
During installation, regard must be paid to the dimensions of the pipes with
respect to the pre-existing water pressure and the pressure loss in order to
ensure sufficient pressure and water flow rates at the draw-off point.
The maximum working pressure is 10 bars, and the maximum operating
temperature is 65°C. If necessary, the supply pipe must be equipped with a
pressure reduction valve and possibly a filter.
As for all pressure vessels, the heat pumps connections must also be
equipped with an approved safety valve on the service side and an ap-
proved check valve on the supply side.
All pipe work must comply with water safety regulations
3.2 Placement of pipe connections
Hot water outlet is mounted on the upper connecting
branch. (¾” RG)
If the unit is used with the circulation of the hot water
supply, the middle connecting branch is used as a return
path. (¾” RG)
Inlet of fresh cold water is mounted on the bottom con-
necting branch. (¾” RG)
It is recommended to use ¾” flex tube for the connection
of the water connection, to avoid possible sound from the
vibration.
3.3 Connection of condensation drain
While the heat pump is running, some condensation wa-
ter will occur, which is conducted to the drain connecting
branch (1).
The quantity of condensation water depends upon the hu-
midity of the air going through the inlet to the heat pump.
The condensation connecting branch must be equipped
with a hose with a tight air trap, and run to a drain. The air
trap must contain a water column of at least 60 mm.
No holes for fittings or the like may be drilled in the product!
Such would be able to damage the functionality of the
product and cause the product to have to be scrapped!
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