EH-105
AH UNIT CONTROL
Select
Measurements
AHU oper.contr.
Settings
Automatic
Changing the control mode:
OK.
Move the cursor to the control mode that you
want. Press
The
character indicates
what has been selected.
The selected control mode also appears on
the top row of the controller's basic display.
In continuous control, clock programmed automatic control is bypassed. The AH unit
runs in the set control mode until the user changes AH control via the controller's control
menu, the monitor or via a text message.
7
KEYWORD:
AHU control
AHU CONTROL:
*Automatic/
Continuous 0/
Continuous 1/2/
Continuous 1/1/
0 timer
h
/
1/2 timer
h
/
1/1 timer h /
0 00
0 00
0 00
Continuous 0 *)
Continuous 1/2
Continuous 1/1
Under automatic control, the AH unit runs according to the week/24 h program or the
special calendar's yearly program (programmed in clock functions).
The controller's clock is programmed in: Clock programs (see p. 15).
Control via GSM text message is inhibited.
When the AH unit output is controlled by a switch connected to the controller or the STOP command is activated,
the answer message reads ”AH-RUNNING: change inhibited (AH 1/1 conn. Guide or Stop emergency switch or
Stop maintenance or Stop alarm or Stop from bus.
Mainten STOP
The AH unit can be shut down by the controller, (e.g., during maintenance) by the
monitor via the bus, or by the EMERGENCY-STOP switch connected to the controller.
STOP-forced drive is freed from the place where it has been taken into use, but a
STOP command given by the monitor can be deleted from the controller. An alarm is
not sent when a STOP command is set from the controller. STOP-maintenance also
stops control from the running permit relay (R3).
MIN timer
h
*
MAX timer
h
*
0 00
0 00
In this mode the air handling unit control mode is selected. Usually automatic
control is used, whereas the air handling unit runs according to the controller's
clock program. The time program set into the controller's clock can be bypassed
by selecting some other control mode illustrated below.
AHU oper.contr.
Automatic
Mainten.STOP
Continuous 0
Continuous 1/2
Continuous 1/1
0 timer
h
0 00
1/2 timer
h
0 00
1/1 timer
h
0 00
*)STOP via bus
Continuous MIN*
Continuous MAX*
Text on the display:
Information about control:
AC freq. converter
controlled AH units:
Continuous MIN
Continuous MAX
MIN timer
MAX timer
Hint !
Hint !
The AH unit can be controlled by an external push
button to the desired output for the post running time set in
the maintenance mode. ”Timer control”
0
timer *)
1/2 timer
*) The AH-Stop command from the bus appears on this display. To bypass the command from the controller
move the cursor to, e.g., Automatic ctrl and press
. The
character indicates what has been selected.
OK
AHU 1/1 Autom.
Room temp.21.2
SupplyTemp20.4
Selection
°C
°C
In timer control, a timer temporarily bypasses clock programs for a certain time period
(setting range 0h00…9h59), after which the controller automatically returns to clock
programmed automatic control. The time that appears on the display shows for how
long the desired timer control is still activated.
Setting timer control:
OK
-
+
OK
Move the
button to the timer control you want.
Press
. The timer time blinks. Press the
or
button to set the hours
and minutes. Press
to confirm the setting.
*)
During 0-control the night heating function can start up the AH unit.
