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

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8.5.5 Finalization
When all connections are made, close the door of the water heater.
Fig. Install the cover
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
Caution
When you turn on the water heater for the first time, make sure that the date and time is
set. Refer to the Economy mode settings menu (see 9.4).
Refer to the procedure in the user part to Turn on the water heater (see 4.1).
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44 Installation, Maintenance and Service part
EN