10
Midco International Inc.
8471 91
MADE
in the
USA
Part 1 - Installation, Service
The LNB Series of burners need to be set correctly to maintain Low NOx emissions.
LNB with Siemens Control
1.
Burner should be prewired and installed on MUA unit.
2.
To begin burner setup, remove 2-10V DC signal to Siemens control board.
3.
Turn on MUA power.
4.
Do not turn on gas at this time.
5.
Burner blower motor will ramp up to high fi re purge.
6.
Burner blower motor will ramp down to low fi re.
7.
Burner will lockout with no gas fl ow.
8.
Reset Siemens control by pressing info button for 3 seconds.
9.
Install a diff erential manometer.
10.
Attach one barb fi tting on side pressure tap of fi rst solenoid gas valve.
11.
Attach one barb fi tting on bottom pressure tap of second solenoid gas valve.
12.
Turn on gas.
13.
Check gas pressure on side inlet of fi rst solenoid gas valve.
14.
Gas pressure should be 7″ WC. Adjust main gas pressure if required.
15.
Turn on MUA power.
16.
Burner will go through sequencing and light.
17.
Burner low fi re fl ame should be mostly blue with slight orange tips.
18.
Adjust low fi re as required by turning Dungs valve top screw CW for more gas, CCW for
less gas.
19.
Diff erential pressure should be approximately 0.05-0.09″ WC for Low fi re.
20.
Document minimum temperature rise at low fi re.
21.
Turn off power to MUA.
22.
Reinstall DC Volt signal to Siemens control board.
23.
Turn on power to MUA.
24.
Set temperature control 70 degrees over booth temperature.
25.
Burner lights and ramps up to high fi re.
26.
Check gas pressure on side inlet of fi rst solenoid gas valve.
27.
Inlet pressure to side inlet of fi rst solenoid gas valve at high fi re should be 5″ WC.
28.
Readjust main gas pressure regulator if required.
29.
Check diff erential gas pressure at barb fi ttings.
30.
Diff erential gas pressure should be 1.8″ WC for high fi re.
31.
To adjust high fi re fi nal setting the manual valve downstream of Dungs valve can be closed
slightly.
LNB with Fenwal Control
1.
Burner should be prewired and installed on MUA unit.
2.
To begin burner setup, remove 2-10V DC signal to SCEBM-1 control board.
3.
Turn on MUA power.
4.
Do not turn on gas at this time.
5.
Burner blower motor will ramp up to high fi re purge.
6.
Burner blower motor will ramp down to low fi re.
7.
Burner will lockout with no gas fl ow.
8.
Turn MUA power off , control will rest after 10-15 seconds.
9.
Install a diff erential manometer.
10.
Attach one barb fi tting on side pressure tap of fi rst solenoid gas valve.
11.
Attach one barb fi tting on bottom pressure tap of second solenoid gas valve.
12.
Turn on gas.
13.
Check gas pressure on side inlet of fi rst solenoid gas valve.
14.
Gas pressure should be 7″ WC. Adjust main gas pressure if required.
15.
Turn on MUA power.
16.
Burner will go through sequencing and light.
17.
Burner low fi re fl ame should be mostly blue with slight orange tips.
18.
Adjust low fi re as required by turning Dungs valve top screw CW for more gas, CCW for
less gas.
19.
Diff erential pressure should be approximately 0.09″ WC for Low fi re.
20.
Document minimum temperature rise at low fi re.
21.
Turn off power to MUA.
22.
Reinstall DC Volt signal to SCEBM-1 control board.
23.
Turn on power to MUA.
24.
Set temperature control 70 degrees over booth temperature.
25.
Burner lights and ramps up to high fi re.
IV Burner Startup
