IDEC SmartRelay FL1D Series - Page 281

Applications
271
IDEC SmartRelay Manual
The circuit diagram for conventional solutions is as follows:
K1 K5
K5
S1
S0
K3K2
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 de
-
vices. This evaluating circuit can be replaced by a single
IDEC SmartRelay unit.
Wiring of an air-conditioning system with FL1D-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 I5I1 I2 I3I1 I2 I3
1 2 1 2 1 2 1 2
Exhaust
fan
Fresh-air
fan
Courtesy of Steven Engineering, Inc. ● 230 Ryan Way, South San Francisco, CA 94080-6370 ● General Inquiries: (800) 670-4183 ● www.stevenengineering.com