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In case of any listed above alarm situations, except for the alarm U5 (overheating of the electric heater) the fans are stopped and the
light indicator «Alarm» on controller display turns on. All the alarms are explained on the controller display.
The automatic control system unblocks all the alarms automatically during the system restart (except for the alarm U5, overheating
of the electric heater).
In case of the electric heater overheating (U5 alarm) the indicator «Alarm» on the controller display lights up. The electric heater is
turned off but both fans continue operating within some time period to cool the electric heating elements down.
Alarm U6 (low supply air temperature) is generated if supply air temperature measured by the temperature sensor TE5 is below the
set value E-03 within time period E-02 after the unit start. This alarm indicates malfunction of the electric heater. In case of this alarm the
electric heater is turned off and both fans are shut down.
D1
Supply air damper
RK1
Rotary heat exchanger
D2
Extract air damper
SM1
Supply damper actuator
F1
Supply fi lter
SM2
Extract damper actuator
F2
Extract fi lter
TE1
Outer air temperature sensor
M1
Supply fan
TE2
Exhaust air temperature
M2
Extract fan
TE5
Supply air duct temperature sensor
P1
Remote control panel
TS1
Overheat protection thermostat T
amb
- 50°C
Q1
Electric heater
TS2
Overheat protection thermostat T
amb
-90°C
FUNCTIONAL DIAGRAM
RK1
F2
M1
P1
M2
TE2
TE5
TE1
Power
supply
Digital input (DI)
Digital output (DO)
Analogue input (AI)
Analogue output (AO)
48V DC
230V AC
400V AC
24V AC
Q1
TS1
TS2
F1
SM1
SM2
D2
Outside
Inside
D1
Summary of Contents for VUT R 1200 EH EC
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