A.O. Smith DRE 52, Installation, User And Service Manual

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8.6 Commissioning
To commission the water heater:
1.
Fill the water heater (see 8.6.1)
2. Turn on the water heater
8.6.1 Filling
Refer to the installation diagram when you fill the water heater:
1.
If applicable, open the stop valves (4) of the circulation pipe (C).
2. Make sure that the drain valve (9) is closed.
3. Open the nearest hot water draw-off point (14).
4. Open the stop valve (4) of the cold water supply pipe (A). Cold water flows into the
water heater.
5. Fill the water heater until a full water jet flows from the nearest draw-off point. The
water heater is completely full.
6. Open all draw-off points to bleed the entire installation of air.
The water heater is now under water supply pressure.
7. Make sure that no water comes out of the expansion valve (15) or the T&P valve (3).
If water comes out:
-
Examine if the water supply pressure is greater than the specified value in the
Technical details. If necessary, install a pressure reducing valve (1).
- Examine if the expansion valve in the protected cold supply set-up is installed
correctly and is not defective. If necessary, replace the expansion valve.
8. Close all hot water draw-off points.
8.6.2 Turn on the water heater
Warning
Make sure that the water heater is isolated from the mains power supply before you open
the door of the water heater to change the temperature setting.
Caution
Make sure that the water heater is filled with water before you turn on the water heater.
Caution
Preferably set the temperature control knobs to 60 ºC. Harmful scaling and lime build-up
will be higher when you set the knobs to 65 ºC and higher. At lower temperature settings
there is a higher risk of high legionella concentrations in the water.
Caution
Always check the water temperature at a draw-off point after you change the
temperature setting.
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0313851_DRE_NLUKFR, 30-03-2022 41
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