Pump T Rela
Pump T Rela
+
-
Contact information from the filters for the filter impurity alarm:
Contact information from the supply air unit's filter pressure difference switch. When
the contact closes, the alarm is given. Clean or change the filter.
Frost PDS 1/1
Information from the pressure difference switch as the HRU's defrost limit is exceeded
with the unit running at the output in question. The contact for the PDS switch closes
when the HRU defrost limit is exceeded. Attention! If one pressure difference switch is
used in 2 output AH units, it is connected to the 1/1FrostPDS input. (AC freq. converter
controlled AH units: connect Frost PDS)
Contact information from the HRU's pressure switch for starting the HRU defrost function:
SF filt. PDS
EF filt. PDS
Frost PDS 1/2
Frost PDS
+ -
C
Contact information from the heating pump's temperature relay. When the contact closes,
the controller gives an alarm and the AH unit shuts down.
Contact information from the cooling pump's temperature relay. When the contact
closes, the controller gives an alarm.
Other contact information:
Electric heater overheating alarm. When the contact closes an alarm is given and after
the post-ventilation period the AH unit is shut down. The electric heater overheating
protection may also have to be acknowledged by the electric heater. Check AH unit
function. A power failure may cause a false overheating alarm, because the electric
heater post-ventilation has not occured.
ElHeatOverh
+
AH heating network's water pressure lower limit alarm. In the event of an alarm, the AH
unit is shut down if the outdoor temperature is below +12°C. Start after the alarm
disppears according to the choice “No acknowl./After acknowl” as with the Main Pump-
function.
Water press
+
Glyc.press
Rotat.Alarm
Unit alarm
El Heat EmrgS
El HeatPerm.
Mainten.STOP
GenAlClose
GenAlarmOpen
-
+ -
+ -
Temperat. 2
Smoke alarm
Smoke alarm information (open contact) shuts down the AH unit (electrically heated AH
units do not have post-ventilation). In the event of an alarm the dampers remain in the
selected position.
Pump T Rela
Contact information from the HRU pump's temperature relay. When the contact closes,
the controller gives an alarm.
+ -
Contact information from an external temperature selector switch. When the contact
is closed, the desired switch ”Temp. 2” set value is in effect. (The desired
temperature is given in the user level settings, ”Temp. 2”).
Information from the pressure switch about the glycol pressure in the glycol cell HRU
dropping too low or going too high. The contact closes and the controller gives an alarm.
Contact information from the rotating HRU control center. The contact closes and the
controller gives an alarm. Check HRU function.
Cooling unit alarm. The contact closes and the controller gives an alarm. Check cooling
unit function.
Alarm information from the electric heaters emergency protection. When the contact
closes, the AH unit is shut down without the postrunning to the stand-by -stage. The
electric heater is forced to zero and an alarm is given
.
When the electric heaters overheating protection is desired to connect to function
without the alarm and the AH unit stop it is connected into this function. The contact is
closed: electric heater can heat, the contact is open: the heating stage output to electric
heater is zero.
After the external contact information is closed the AH unit is shut down to
Mainen.STOP- stage. AH units with electric heaters are shut down after the postrun. Is
stronger than other outputs as long as the contact is closed. No alarm is sent, but in the
main display is the text Mainten. STOP.
Contact information about an alarm. When the contact is closed an alarm is given. A
maximum of
general
alarms can be connected to the controller and they
can be labeled using the text editor.
Contact information about an alarm. When the contact is open an alarm is given. One
general
alarm can be connected to the controller and it can be labeled using
the text editor.
two
closing
opening
EH-105
ADDITIONAL INFORMATON ABOUT ON/OFF INPUTS
EH-105
Explanation:
On the display:
:
46
