Inspection and maintenance 8
0020273765_00 atmoMAG Installation and maintenance instructions
17
Conditions
: The deviation is greater than
±
5%
▶
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 13)
▶
Clean the burner. (
→
Page 14)
▶
Refit the burner assembly in the reverse order.
▶
Repeat the check of the heat input.
▶
If the deviation continues to be greater than
±
5%, adjust
the maximum heat input (
→
Page 17).
Burner pressure test method
1
▶
Unscrew the sealing screw from the test nipple
(1)
for the
burner pressure.
▶
Remove the seal.
▶
Connect a manometer (resolution at least 0.1 bar).
▶
Start up the product.
▶
Turn the temperature selector clockwise as far as it will
go in order to reduce the water volume and set the max-
imum water temperature.
▶
Turn the rotary power switch as far as it will go anti-clock-
wise to set the maximum product output.
▶
Draw off domestic hot water with the water tap fully open
to enable the nominal water volume to flow (
→
Technical
data).
▶
Look up the required burner pressure in the tables of gas
settings in the appendix and compare the value with the
corresponding value in the table.
Note
Deviations of
±
10% are permitted.
▶
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 13)
▶
Clean the burner. (
→
Page 14)
▶
Refit the burner assembly in the reverse order.
▶
Repeat the check of the heat input.
▶
If the deviation continues to be greater than
±
10%, adjust
the maximum heat input (
→
Page 17).
8.13
Setting the maximum heat input
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
