Applications, Idec smartrelay manual 277 – IDEC FL1E SmartRelay User Manual
Page 291
Applications
IDEC SmartRelay Manual
277
The circuit diagram for conventional solutions is as follows:
K1
K5
K5
S1
S0
K3
K2
L1
N
S2
K1
v>
S2
H1
K4
S3 v>
K5
H2
K2
K4
Auxiliary circuit
Exhaust air
Fresh air
Operation
Error
The fans are monitored by means of flow sensors. If no air
flow is registered within a short waiting time, the system is
switched off and an error message is output. This message
can be acknowledged by pressing the OFF button.
In addition to the flow sensors, the fan monitoring system
also requires an evaluating circuit with several switching
devices. This evaluating circuit can be replaced by a single
IDEC SmartRelay unit.
Wiring of an air-conditioning system with FL1E-H12RCC
L1 N
I1
I3 I6 I7 I8
Q1
Q2
Q3
Q4
K1
K2
S1
L1
N
S2
S3 v>
v>
H1
H2
S0
I4
I5
I1 I2 I3
I1 I2 I3
1 2
1 2 1 2 1 2
Exhaust
fan
Fresh-air
fan