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D
U
C
T T
YP
E
AR
G
12
-1
8L
LT
B
D
U
C
T T
YP
E
AR
G
12
-1
8L
LT
B
AUXILIARY HEATER OUTPUT
A signal is outputed from Connector when indoor fan and compressor is turned on under heating
operation.
* Signal output performance specifications are as
shown on the right
Ex. When Set Temperature(Ts) is 22°C;
▪ and Room Temperature(Tr) increase above 12°C,
signal output is on.
▪ and Room Temperature(Tr) increase above 21°C,
signal output is off.
▪ and Room Temperature(Tr) decrease below 19°C, signal output is on.
▪and Room Temperature(Tr) decrease below 10°C, signal output is off.
Jumper wire (Indoor Unit)
z
This is used to continue indoor unit fan operation for 1 minute after thermo OFF in heating mode.
1 minute delay control set by cutting jumper wire on PCB.
Circuit diagram example
z
Field supply
Indoor unit
control PC board
Connector
1
12 V
on/off 2
Signal
Relay
power
supply
* Make the distance from the PC board to the connected unit within 10m.
Relay spec. : Rated 12VDC, 50mA or less.
Ex.) Heater
Connected unit
Ex.) Relay unit
*10 m
ON
OFF
Operation
Stop
Heating
operation
Indoor unit fan
ON
OFF
Output signal
1min
CAUTION
Please place an external heater between the indoor unit
and the outlet.
Please be sure to use delay control of the fan.
Parts (Optional)
z
Model name
UTD-ECS5A
Wire (Heater output)
OFF
OFF
ON
Tr-Ts = -1°C
Tr-Ts
Tr-Ts = -3°C
Tr-Ts = -10°C
Tr-Ts = -12°C
External
Heater
Supply air
Return air
Indoor unit
!