Monitoring Functions - Danfoss ADAP-KOOL AK-LM 340 User Manual

Monitoring functions

Consumption reading (8 units)
This function registers the consumption of electricity, water, gas,
etc.
These readings are saved in the monitoring unit and can be re-
trieved later for presentation/analysis. An expansion module type
AK-XM 107A must be used. The module is a pulse counter module,
which measures pulses in accordance with DIN 43 864. Conver-
sion from, for example, current to pulses takes place in an energy
counter.
Energy counters can be divided into several groups, e.g. one main
meter and several ancillary meters.
The main meter measures all of the consumption for the installa-
tion. Some main meters are fitted with tariff and synchronisation
switches.
The AK-LM 340 can not receive the synchronisation signal.
It will automatically set a measurement period, which will be the
same for all counters.
The synchronisation switch changes at regular intervals (typically
every 15 mins) and indicates that a new measurement period has
started.
Ancillary meters measure an element of consumption. It might be
interesting to know, for example, the freezer department's energy
consumption.
The monitoring unit supports up to 8 energy meters.
Each consumption meter has the following available functions:
• Name
• Start/stop of consumption measurement
• Setting the consumption measurement
• Setting the meter
• Selection of number of pulses per unit of measurement
• The conversion factor is defined as primary/secondary ratio
• Setting the consumption value, e.g. by installation of counter
In addition it is possible to read historical and current values:
• Total consumption (since start-up or reset the counter)
• Consumption for past week (from Monday at 0 until Sunday at
24 o'clock)
• Consumption for past day (from 0 to 24 o'clock)
• Current output (average power the last 60 seconds. Updated
every 5 seconds)
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• Average output (average power in the measurement interval,
typically 15 minutes).
Relay Position at sensor failure
For the following functions with relays applies:
If the signal from a temperature sensor or a pressure transmitter fails, the
relay function switch to off when the delay time has passed.
82 RS8GV202 © Danfoss 2016-06
Thermostats (5 units)
The function may freely be used for:
• Temperature registration
• Temperature monitoring with alarm function
• Temperature control with relay function
An example could be thermostat control of the fan in the com-
pressor compartment.
The thermostat can be used as one of the sensors S1, S2, S3, .. etc.
Cutin and cutout limits are set for the thermostat. Coupling
of the thermostat's output will be based on the actual sensor
temperature. Alarm limits can be set for low and high temperature,
respectively, including separate alarm delays.
The individual thermostat function can be adapted to the relevant
application as it is possible to give the thermostat a name and to
indicate alarm texts.
Each thermostat function can also detect two digital signals which
can be used to change alarm signals.
One signal that will change the alarm delay so that a change is
made to the long alarm delay. This signal is primarily used with a
defrosting so that no alarm is triggered during a defrosting.
A signal that stops the alarm. This signal is primarily used during
stoppage of a refrigeration appliance, e.g. during cleaning.
Each thermostat has the following available functions:
• Name
• Sensor signal
• Display of the current reading
• Selection of relay function
• Setting the cut-out value for relays
• Setting the cut-in value for relays
• Setting of the delay time for cutout
• Setting of the delay time for cutin
• Selection of the input signal that changes to Alarm Delay 2
• Selection of the input signal that stops alarms
• High alarm limit
• Delay time for 'high alarm'
• Delay time 2 for 'high alarm'
• Alarm text for 'high alarm'
• Low alarm limit
• Delay time for 'low alarm'
• Alarm text for 'low alarm'
AK-LM 340