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Mechanical design
The LMV52... is a microprocessor-based burner management sys-
tem with matching system components for the control and supervi-
sion of forced draft burners of medium to large capacity.
The following components are integrated in the basic unit of the
LMV52...:
• Burner control with gas valve proving system
• Electronic fuel / air ratio control with a maximum of 6 actuators
• Optional PID temperature / pressure controller (load controller)
• Optional VSD moduleMechanical design
Installation notes
• Ensure that the electrical wiring inside the boiler is in compliance
with national and local safety regulations.
• Do not mix up live and neutral conductors.
• Make certain that strain relief of the connected cables is in compli-
ance with the relevant standards (e.g. as per DIN EN 60730 and
DIN EN 60 335).
• Ensure that spliced wires cannot get into contact with neighboring
terminals. Use adequate ferrules.
• Always run high-voltage ignition cables separately while observing the greatest possible distance to the unit and to other cables
• The burner manufacturer must protect unused AC 230 V terminals with dummy plugs (refer to sections Suppliers of other ac-
cessory items).
• When wiring the unit, ensure that AC 230 V mains voltage cables are run strictly separate from extra low-voltage cables to war-
rant protection against electrical shock hazard.
Electrical connection of ionization probe and flame detector
It is important to achieve practically disturbance- and loss-free signal transmission:
• Never run the detector cables together with other cables:
– Line capacitance reduces the magnitude of the flame signal.
– Use a separate cable.
• Observe the permissible cable lengths.
• The ionization probe is not protected against electrical shock hazard. The mainspowered ionization probe must be protected
against accidental contact.
• Locate the ignition electrode and the ionization probe such that the ignition spark cannot arc over to the ionization
probe (risk of electrical overloads).
16
5
CHAPTER
Preparation for start up
D9301
Fig. 20
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