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CONNECTION OF EXTERNAL CONTROLS
The ventilation unit enables connection of maximum 5 controls. If any control unit is activated, the ventilation unit goes to high-speed
mode.
Connectable controls:
1. Remote control (thermostat).
Remote control (thermostat) functions:
• Unit on/off
• Speed selection
• Indoor temperature display
• Scheduled operation
2. CO
2
sensor.
Recommended for use in office buildings and public premises. When carbon dioxide concentration exceeds the set point, the unit goes
to the high speed mode.
3. Humidistat.
The humidistat is used for indoor humidity control. When indoor humidity exceeds the set point, the unit goes to the high speed mode
and runs with the high speed until the humidity level falls down below the set point. The humidity set point is adjustable.
4. Timer.
A remote timer is recommended for polluted indoor air areas. In case of the timer activation, the unit goes to the high speed mode and
runs for the set time.
5. Switch.
A switch is recommended for the polluted indoor air areas. When the switch contacts are closed, the unit goes to the high speed mode.
Open the switch contacts to return to the permanent low-speed mode.
All the listed above controls must be connected in compliance with the wiring diagram. Maximum five various controls can be parallel
connected to the terminals 1 and 4.
6. Fire alarm panel signal.
When the dry contacts No. 31 and 32 are opened, the unit has emergency shutdown.The contacts are jumped by the manufacturer. The
jumper must be removed in case of use of the fire alarm.
All the controls listed above must be connected in compliance with the wiring diagram.
G0
Med
Low
High
24 AC
LED (24 V DC)
24 V DC
10%
20%
30%
40%
max
off
OFF
60
50
40
10
20
ON
OFF
ModBus
24 A
C
1
3 4 5
2
5 6
4
3
2
1
6
8
7
10
9
12
11
Lo
w
M
ed
H
igh
G0
0L 0C
I
0L
0C
I
GND
GND
CO
M
24
V
AC
H
igh
+24V
+24V
A
A
B
B
MODE
20
MIN
60
MIN
40
MIN
20
MIN
40
MIN
60
MIN
ROOM
External control devices
Thermostat
Timers 20 / 40 / 60 min
Terminal block for external connections
Push Button
Button (24 V DC)
Summary of Contents for ERV 100
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