Strebel S-FX 125, Installation Operating & Maintenance Manual

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14.2 Putting the Burner into High & Low Fire
This is done through the user menu under the maintenance chapter under test mode. To enter this mode,
navigate through the following path:
“USER MENU” > “MAINTENANCE” > “TEST MODE” > “TEST MODE”
Once in this mode the S-FX boiler will ignite and
modulate up to a high fire.
The display will show the current percentage the
burner is burning (left) and the maximum
heating power (range rated) as shown in the
picture to the right. The range rated figure is
explained in the next chapter.
Press the contextual buttons 1 & 2 to increase /
decrease the burner power. To deactivate this
test press contextual button 3 or alternately after
15 minutes the test will automatically finish.
Do not turn off the S-FX boiler electronically during the test.
If this happens, when the power is switched on again the system does not recognise deactivation of
the test. Therefore, it will start operating in test mode and not in normal operation.
14.3 High & Low Fire Adjustment
14.3.1 A
DJUSTING
T
HE
B
URNER
A
T
H
IGH
F
IRE
1. From the home
screen, go to “User Menu” > “Maintenance” > “Test Mode” > “Test Mode.”
2. Press contextual button 1 until burner power is 100%
The boiler will fire up, after about 10 seconds, the boiler burns at high fire.
3. Measure the CO
2
percentage.
4.
Using the “Gas Max” adjustment screw, set the combustion to the require CO2 valve as shown in the previous
chapter.
14.3.2 A
DJUSTING
T
HE
B
URNER
A
T
L
OW
F
IRE
1.
From the home screen, go to “User Menu” > “Maintenance” > “Test Mode” > “Test Mode.”
2. Press contextual button 2 until burner power is at its minimum.
The boiler will fire up, after about 10 seconds, the boiler burns at low fire.
3. Measure the CO
2
percentage.
4.
Using the “Gas Min” adjustment screw, set the combustion to the require CO2 valve as shown in the previous
chapter.
Repeat the above process to ensure the combustion figures are correct, adjust if required.
The test mode automatically stops after 15 minutes, after this the system continues with normal demand
handling. When the system test mode is changed during an active system test, the 10-minute timer is restarted.