6 Functional tests
NGW 300 / LGW 300 / GBW 300
602
6.3
Tests of individual components
6.3.1 Test of the regulating thermostat
PLEASE NOTE
The regulating thermostat must be firmly screwed in (by
hand) and the protective cap must be mounted. The
cables must not be damaged.
Test
During the test with a digital multimeter the the flow rate of
the regulating thermostat should be checked.
Switching temperature:
–
opens at 75
±
3 °C
–
closes at 68
±
5 °C
At room temperature the contact is closed. When it heats
to above the upper switching point, it is opened.
6.3.2 Temperature limiter test
ATTENTION
The retaining spring must be in the temperature limiter’s
slot and must be locked in place on both sides of the
housing. Union. The cables must not be damaged and
must not be located above the release button.
Test
During the test with a digital multimeter the the flow rate
of the regulating thermostat should be checked.
Switching temperature:
–
opens at 125 °C +8 /-4 °C
When it cools down, the temperature limiter remains open
until approx. 5 °C. Once it reaches a temperature below
90 °C, it can be reset by pressing the button.
6.3.3 Test of the ignition electrodes
PLEASE NOTE
The insulating material of the ignition electrodes must not
show any sign of damage or cracks. Ignition electrodes
with an electrode clearance outside of the tolerance or
ignition electrodes which are not working flawlessly must
be replaced
Test
–
Examine the insulation material of the ignition
electrodes for damage.
–
Check the electrode clearance in accordance with
figure. 602 and the condition of the ignition electrodes.
6.3.4 Test of the flame monitor electrode
PLEASE NOTE
The insulating material of the ignition electrodes must not
show any sign of damage or cracks. If a flame monitor
electrode is not working perfectly, it should be replaced.
Test
–
Examine the insulating material of the flame monitor
electrode for damage.
–
Check the electrode clearance in accordance with
fig. 602 and the status of the flame monitor electrode.
Fig. 602 Testing the electrode clearances
11,4
±
1
5
±
0,5
13,4
±
1
