A.O. Smith TWI 35-200, Инструкция по установке, эксплуатации и обслуживанию

Страница: 49 / 92

8.8.2 Mains power
Note
The water heater is supplied without a power cable and isolator.
Use a power cable with cores of at least 3 x 0,75 mm
2
and a double-pole isolator with a
contact gap of at least 3 mm.
Connect the water heater to the mains power supply:
1.
Pull the power cable through the grommet.
2. Connect the mains neutral core to N, the mains live core to L and the mains earth
core to
A
.
3. Connect the power cable to the double pole isolator.
Note
The length of the mains earth core, that is connected to the electrical connection, must
be longer than the core of the mains neutral and live.
8.8.3 External ON mode switch (optional)
Install an external ON mode switch:
1.
Pull the cables through the grommet.
2. Connect the cables to the two left connections on J17. (see 13.5)
3. Set the appropriate settings in the interface (see 10.5.1).
8.8.4 Finalization
When all connections are made, install the cover on the water heater:
1.
Place the cover on the water heater.
2. Use a screw driver to tighten the screws at the front of the cover.
8.9 Commissioning
To commission the water heater:
1.
Fill the water heater (see 8.9.1)
2. Check the air pressure differential (see 8.9.2)
3. Check the gas supply pressure 8.9.3
4. Check the CO
2
value (see 8.9.4)
5. Turn on the water heater (see 8.9.5)
8.9.1 Filling
Refer to the installation diagram when you fill the water heater:
1.
Open the stop valve (11) in the hot water supply pipe.
2. If applicable, open the stop valves (4) of the circulation pipe (C).
3. Make sure that the drain valve (9) is closed.
4. Open the nearest hot water draw-off point (14).
5. Open the stop valve (4) of the cold water supply pipe (A). Cold water flows into the
water heater.
6. Fill the water heater until a full water jet flows from the nearest draw-off point. The
water heater is completely full.
7. Open all draw-off points to bleed the entire installation of air.
The water heater is now under water supply pressure.
8. 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 defect. If necessary, replace the expansion valve.
n
n
0313279_TWISTER II_UKUK_
V1.1, 18-02-2019
49