Start-Up Procedure - Unigas LMV5 Series Manual Of Installation - Use - Maintenance

14 Bleed the line, getting rid of all the air in the pipe. Adjust the pump plug during priming and on the pre-heating tank (if any), so that
the resistors are not damaged. For any advice, see the pump chapter.
DANGER! Venting the air from the oil line can also be accompanied by oil leakage, with the consequent risks for
the operator and the surrounding devices. Use appropriate caution.
Adjustments - brief description
The air and fuel rates adjustments must be performed at the maximum ouptput first ("high flame"): see the LMV related manual.
Check that the combustion parameters are in the suggested limits.

Check the flow rate measuring it on the counter or, if it was not possible, verifying the combustion head pressure by means of a dif-

ferential pressure gauge, as described on par. "Measuring the gas pressure in the combustion head".
Then, adjust the combustion values by setting the "gas/air" ratio" curvepoints (see the LMV related manual).

Set, now, the low flame output (according to the procedure described on the "Siemens LMV manual") in order to avoid the low

flame output increasing too much or that the flues temperature gets too low to cause condensation in the chimney.

Start-up procedure

1 Turn the burner on.
2 the LMV control box starts the system test cycle: the AZL display shows the System Test message; at the end of the test, it shows
the main page and the system stops (the safety chain is open) waiting for the startup enabling signal (standby - Program phase no.
12)
3 check the fan motor rotation (see related paragraph).
4 make the safety chain enabling the system to start up
5 the combustion cycle starts: the system will show the operating stages
- Prepurging (program phase no.30)
- Driving to ignition position (program phase no.36)
- Ignition position (program phase no.38)
- Fuel (the fuel solenoid valves open)
- Flame (the flame lights up)
- Driving to low flame (the actuator drives to low flame).
NOTE: the C and A, on the .
Once the ignition cycle ends, the main page is shown:
Set point: temperature set-point
Act value: actual temperature value
Load: load percentage (burner output)
Flame: percentage of flame detection current.
By pressing the ENTER key the display shows the second page:
Setpoint
Act.value
Fuel
Standby
Main page
Setpoint
Act.value
Load
Flame
Main page
31
80°C
78°C
GAS
12
80°C
78°C
24%
60%
PART III: OPERATION