Laars MagnaTherm MGH1600, Инструкции по установке и эксплуатации для

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LAARS Heating Systems
Page 78
pilot test hold.
9. This unit is equipped with a zero governing,
negative regulator valve. The valve throttle
should be adjusted only at high fire, and the offset
adjustment is only to be done at low fire. From
the “Home” screen touch the control icon, then
touch, Diagnostics. On the I/O status screen press
“Diagnostic Tests” and enter the installer password
by pressing the padlock in the upper right corner.
Menu 29. Burner Status
Menu 30. I/0 Status
10. From here you can manually adjust the
fan speed by pressing either the “Maximum
Modulation” or “Minimum Modulation” buttons,
then the “Start Test” button. In this mode the boiler
will run at the selected firing rate for a period
of five minutes or until the “Stop Test” button is
pressed. The fan speed control feature is only
active when the boiler is in “Run” mode. To setup
high fire select “maximum modulation”, then “Start
Test” buttons. Wait for the boiler to enter run and
the fan speed to reach the maximum RPM. Using
a combustion analyzer, dial in the high fire throttle
to obtain the correct CO2 and CO measurements.
(refer to Table 24 for correct CO2 ranges).
Menu 31. Modulation Test
11. Once high fire is setup correctly select “Minimum
Modulation” and wait for the fan speed to reach
minimum RPM. When at low fire adjust the offset
screw to adjust the low fire CO2 to the correct
values. (refer to Table 24 for correct CO2 ranges)
12. After the setup for High and Low fire have been
completed, go back to the “Firing Rate” menu, and
select “Automatic”. This MUST be done to ensure
proper boiler operation.
Model Propane
Orifice(inches)
Propane
Pressure
Natural
Pressure
1600 0.035 3” - 4” 3” - 4”
2000 0.040 3” - 4” 3” - 4”
2500 0.035 3” - 4” 3” - 4”
3000 0.035 3” - 4” 3” - 4”
3500 0.047 2” - 3” 3” - 4”
4000 0.047 2” - 3” 3” - 4”
Table 23. Required Pilot Gas Pressures