Start-Up Procedure - Unigas HTLX 1025.1 Installation Manual

PART II: OPERATION
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:
Fuel: it shows (in degrees) the fuel actuator position.
Air: it shows (in degrees) the air actuator position.
Ax1..3: auxiliaries.
VSD: % value on the inverter maximum frequency
Setpoint
Act.value
Fuel
Standby
Main page
Setpoint
Act.value
Load
Flame
Main page
Fuel 0.0
Ax
Ax
Ax
Second page
30
80°C
78°C
GAS
12
80°C
78°C
24%
60%
Air 1.8
VSD 0.0
O2
Ld. 0.0