A.O. Smith Innovo IR 12-160, Installation, User And Service Manual

Page: 52 / 96

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 (see 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 (see 8.3) 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.
8.9.2 Air pressure differential
Check the air pressure differential across the air pressure switch:
1.
Disconnect hose H of the air proving switch and connect this side of the hose to the
+ of the pressure gauge.
2. Disconnect hose L of the air pressure switch and connect this side of the hose to the
- of the pressure gauge.
3. Turn the water heater on and set the water heater in OFF mode, refer to Turn on the
water heater (see 4.2).
Note
Make sure that the water heater is not in ON mode or in External ON mode.
4. Set parameter
201
to
FAn
, refer to Settings (see 10).
5. Read the pressure value from the meter.
6. Compare the measured value to the value from the table.
Note
When the air pressure differential is not correct, refer to Displayed errors (see
12.1.2), error
F03
.
7. Set parameter
201
to
dIS
, refer to Settings (see 10).
8. Press [RESET].
The water heater goes into OFF mode.
9. Set the control switch on the side of the water heater to 0 to turn off the water
heater.
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52 Installation, Maintenance and Service part