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AUXILIARY HEATER OUTPUT
Corresponding indoor units: slim duct type, duct type, high static pressure duct type
A signal is outputed from Connector when indoor fan and compressor turn 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 locate a external heater between the indoor unit
and the outlet.
Please be sure to use delay control of a fan.
Parts (Optional)
z
Parts name
Model name
External control set
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
