CleaverBrooks ProFire Q Series, Installation Operation & Maintenance

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750-437
Q Series Full Modulation
1-3
Introduction
1.3 — Burner Control and Air Delivery
FIGURE 1-2.
Burner Control and Air Delivery
1.3.1 — LMV37 Flame Safeguard and linkage-less fuel-air-ratio controller
The LMV37 incorporates burner sequencing functionality; flame detection; variable speed drive (VSD) control
and fuel-air-ratio control. Flame is detected by UV flame scanner. The LMV37 can modulate the burner from low
to high fire with servo control of the fuel metering valve and VSD electrical connection to the blower motor to
control fan speed (air volume).
Item Component Details
1 LMV37 Control Combined flame-safeguard (FSG) and fuel-air-ratio-controller
2 Fuse holders Motor and control circuit fusing
3 Terminal Strip Field wiring interface
4 Power Supply 24Vdc for motor control speed input
5 DC modulation control The unit is fully modulated in response to the command signal sent from the LMV37.
6 DC (EC*) motor-fan
*Electronically Commutated
DC variable speed motor-fan unit with integral electronic controls. The unit is energized
by 115VAC power input.
Read the LMV37 manual and fully understand its contents before attempting to operate this equipment. Failure to do
so may result in serious personal injury or death.
750-00533-000
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