Alarm - Danfoss ECL Comfort 310 Installation Manual

Installation Guide

5.8 Alarm

Many applications in the ECL Comfort 210 and 310 series have an
alarm function. The alarm function typically activates relay 4 (ECL
Comfort 210) or relay 6 (ECL Comfort 310).
The alarm relay can activate a lamp, a horn, an input to an alarm
transmitting device etc.
The relay in question is activated as long as the alarm condition
is present.
Typical alarms:
• Actual flow temperature differs from the desired flow
temperature.
• Too low or too high pressure (A376.9)
• Extra alarms, for example circulation pump malfunction
(A376.9)
Besides the mentioned alarm types, alarm can be activated when a
temperature sensor becomes defective (i.e. outside the measuring
range -60 ... 150 °C). This is the case if the connection to the
temperature sensor is disconnected, short-circuited or the sensor
itself is defective.
See the set-up procedure for temperature sensor alarms in section
'Common controller settings' , 'System' , ' Raw input overview' .
5.8.1 Temp. monitor.
Upper difference
Circuit
1
The alarm is activated if the actual flow temperature increases more than
the set difference (acceptable temperature difference above the desired
flow temperature). See also 'Delay'.
OFF: The alarm function is not active.
1 ... 30 K: The alarm function is active if the actual temperature
gets above the acceptable difference.
Lower difference
Circuit
1
The alarm is activated if the actual flow temperature decreases more than
the set difference (acceptable temperature difference below the desired
flow temperature). See also 'Delay'.
OFF: The alarm function is not active.
1 ... 30 K: The alarm function is active if the actual temperature
gets below the acceptable difference.
Danfoss District Energy
ECL Comfort 310, application A376
11147
Setting range Factory setting
OFF / 1 ... 30 K OFF
11148
Setting range Factory setting
OFF / 1 ... 30 K OFF
Flow temp. °C
Flow temp. °C
VI.GU.B1.02
Upper difference (set
value)
Desired flow temp.
Outdoor temp.
Lower difference (set
value)
Desired flow temp.
Outdoor temp.
DEN-SMT/DK 97