750-437
Q Series Full Modulation
3-1
CHAPTER 3
Operation
3.1 — Preparations for Starting
The following items must be satisfied before any attempt is made to operate the burner:
•
Electric, fuel, water, and vent stack connections are complete and all connections are confirmed tight.
•
The operator is familiar with the boiler components and controls.
•
The operator is familiar with the burner and understands: the burner components and controls (Chapter 1);
the LMV3 sequence of operation; and the burner wiring to the boiler controls per the burner wiring diagram.
In addition, the following checks must be made:
3.1.1 — Gas Supply
A representative of the gas utility should turn on the gas. Confirm sufficient pressure exists at the entrance to the
gas train (use test gauge upstream of the burner regulator). The gas pressure regulator must be adjusted to the
pressure required.
3.1.2 — Burner Settings
To ensure reliable and safe burner performance, the fan speed and gas settings must be checked and adjusted
prior to placing the burner into initial service, or after conducting any service work that may have altered the
settings. The modulating firing rate is controlled by a temperature or pressure sensor in conjunction with a
controller capable of generating a 4-20 mA output signal (minimum 500-ohm impedance) or a floating bumping
Item
Check
Boiler
Boiler water level.
Be sure all boiler valves are installed correctly and positioned properly.
Set the high limit control slightly above the desired temperature.
Set the operating control to the desired temperature or pressure.
Set modulating controls at the desired temperature or pressure.
Burner
Check the electrical power supply to the burner in accordance with the nameplate voltage.
Check the fuel control actuator for proper movement of the fuel metering valve.
Refer to the Siemens LMV3 manual for additional information.
NOTE:
Separate modulating load controller
required for operation.
Summary of Contents for ProFire Q Series
Page 2: ......
Page 18: ...Introduction 1 8 750 437 Q Series Full Modulation...
Page 28: ...Installation 2 10 750 437 Q Series Full Modulation...
Page 50: ...Operation 3 22 750 437 Q Series Full Modulation...
Page 82: ...Troubleshooting 6 24 750 437 Q Series Full Modulation...
Page 87: ......
Page 88: ......
