Design and Technical Manual

6. SYSTEM DESIGN
AUXILIARY HEATER OUTPUT

Compact Cassette Slim Duct Wall Mounted Floor
Connector - CN10 ― ―
A signal is outputed from Connector when indoor fan and compressor turn on under heating
operation.
* Signal output performance specications are as
shown on the right
Ex. When Set Temperature(Ts) is 72°F(22°C)
▪ and Room Temperature(Tr) increase above
52°F(12°C), signal output is on.
▪ and Room Temperature(Tr) increase
above70°F(21°C), signal output is off.
▪ and Room Temperature(Tr) decrease below 66°F(19°C), signal output is on.
▪and Room Temperature(Tr) decrease below 48°F(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
Relay spec.:
Rated 12V DC, 50mA to less.
Field supply
Indoor unit
control PC board
Connector
1
12 V
on/off
2
Signal
Relay
power
supply
Ex.) Heater
Connected unit
Ex.) Relay unit
*33ft.
(10m)
* Make the distance from the PC board to the connected unit within 33ft. (10m).
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
Compact Cassette Slim Duct Wall Mounted Floor
Parts name ― External control set ― ―
Model name ― UTD-ECS5A ― ―
OFF
OFF
ON
Tr-Ts = -2°F( -1°C)
Tr-Ts
Tr-Ts = -6°F( -3°C)
Tr-Ts = -20°F( -10°C)
Tr-Ts = -24°F( -12°C)
External
Heater
Supply air Return air
Indoor unit
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SYSTEM DESIGN SYSTEM DESIGN