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Building Technologies Basic documentation LMV37.4... CC1P7546en
HVAC Products 13 Fuel meter input X75.1 / X75.2 01.12.2009
13 Fuel meter input X75.1 / X75.2
A fuel meter can be connected to acquire the amount of fuel burnt.
The fuel meter function is only available as an alternative to VSD control. If the VSD is
deactivated, a fuel meter can be connected to terminals X75.1 and X75.2.
LMV...
Bild 338e/1109
X75
Detector supply fuel meter
Fuel meter input
2
1
Figure 52: Fuel meter input X75
13.1 Configuration of fuel meter
13.1.1 Types of fuel meters
The LMV37.4... system is designed for use with fuel meters equipped with a Reed con-
tact. Pulse frequency at maximum fuel throughput must be below 300 Hz.
13.1.2 Configuration of pulses per volume unit
Depending on the type of fuel meter used, the number of pulses supplied by it per
m³ or
l fuel must be parameterized. A maximum of 400 pulses per volume unit can be preset.
The correct amount of fuel is acquired only when this parameter is set.
When the parameter is 0, the fuel meter stops.
No. Parameter
128 Fuel meter: Pulse valency (pulses / volume unit)
13.1.3 Reading and resetting the meter readings
No. Parameter
167 Fuel volume resettable (m³, l, ft³, gal)
The cumulated fuel volume can be read out per parameter. The meter reading can also
be reset on the parameter level.
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