Inspection and maintenance 8
0020271929_00 atmoMAG Installation and maintenance instructions
19
ure selector spindle, remove these and clean the tem-
perature selector spindle.
9.
Check the stuffing box for tightness. If a stuffing box is
leaking, replace the water valve.
8.12
Checking the heat input
▶
Check the heat input either by reading off the gas flow
values at the counter (volumetric method) or by checking
the burner pressure (burner pressure test method).
Volumetric method
1
2
▶
When carrying out the check, ensure that no additional
gases (e.g. mixtures of liquid gas and air) are fed in to
cover the peak demand. Contact the responsible gas
supply company for this.
▶
Ensure that no other gas-fired boilers are operated during
the check.
▶
Start up the product.
▶
Turn the temperature selector
(1)
clockwise as far as it
will go in order to reduce the water volume and set the
maximum water temperature.
▶
Turn the rotary power switch
(2)
as far as it will go anti-
clockwise to set the maximum product output.
▶
Determine the required gas flow value at nominal heat
input in accordance with the tables of gas settings in the
appendix.
▶
Note down the gas meter reading.
▶
Draw off domestic hot water with the water tap fully open
to enable the nominal water volume to flow (
→
Technical
data).
▶
After approx. five minutes of the product running in
continuous operation, read off the gas flow value at
the meter and compare this with the gas flow value at
nominal heat input in the tables of gas settings in the
appendix.
Note
Deviations of
±
5% are permitted.
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 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
±
5%, adjust
the maximum heat input (
→
Page 20).
Applicability:
Belgium
▶
If the deviation continues to be greater than
±
5%, check
the heat input (
→
Page 20).
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.
