8 Inspection and maintenance
20
Installation and maintenance instructions atmoMAG 0020271929_00
▶
Remove the manometer.
▶
Place the sealing screw and the seal on the test nipple,
tighten the sealing screw and check that it is leak-tight.
Conditions
: The deviation is greater than
±
10%
▶
Check whether the correct burner jets have been used in
the injector rail for the burner by comparing the labels on
the burner jets with the specifications in the tables of gas
settings in the appendix.
▶
If incorrect burner jets have been used, contact Customer
Service. Do not start up the product.
▶
If the correct burner jets are being used, continue with
the following steps.
▶
Remove the burner. (
→
Page 16)
▶
Clean the burner. (
→
Page 17)
▶
Refit the burner assembly in the reverse order.
▶
Repeat the check of the heat input.
Applicability:
Except Belgium
▶
If the deviation continues to be greater than
±
10%, adjust
the maximum heat input (
→
Page 20).
Applicability:
Belgium
▶
If the deviation continues to be greater than
±
10%, check
the maximum heat input (
→
Page 20).
8.13
Setting the maximum heat input
Applicability:
Except Belgium
1
2
1.
Turn the temperature selector clockwise as far as it
will go in order to reduce the water volume and set the
maximum water temperature.
2.
Turn the rotary power switch as far as it will go anti-
clockwise to set the maximum product output.
3.
Unscrew the sealing screw from the test nipple
(1)
for
the burner pressure.
4.
Connect a U-tube manometer (resolution at least
0.1 bar).
Caution.
Risk of a gas leak
The adjusting screw seals the gas valve as-
sembly in the housing.
▶
Never fully unscrew the adjusting screw.
5.
Use a flat-blade screwdriver to set the maximum heat
input on the adjusting screw
(2)
.
6.
Read off the value for the maximum heat input on the
U-tube manometer.
7.
If you are unable to set the correct values in accord-
ance with the tables of gas settings in the appendix, do
not start up the product. Report this to customer ser-
vice.
8.
Remove the U-tube manometer.
9.
Place the sealing screw and the seal on the test nipple,
tighten the sealing screw and check that it is leak-tight.
8.14
Checking the heat input
Applicability:
Belgium
1
1.
Turn the temperature selector clockwise as far as it
will go in order to reduce the water volume and set the
maximum water temperature.
2.
Turn the rotary power switch as far as it will go anti-
clockwise to set the maximum product output.
3.
Unscrew the sealing screw from the test nipple
(1)
for
the burner pressure.
4.
Connect a U-tube manometer (resolution at least
0.1 bar).
5.
Read off the value for the heat input on the U-tube
manometer.
6.
If the measured values do not match the values in the
Tables of gas settings (
→
Page 26), do not start up the
product. Report this to Vaillant Customer Service.
7.
Remove the U-tube manometer.
8.
Place the sealing screw and the seal on the test nipple,
tighten the sealing screw and check that it is leak-tight.
