Fujitsu AUU7RLF Design & Technical Manual page 126

AUXILIARY HEATER OUTPUT
„ „
Connector
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 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.
Fan delay setting (JM3)
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 „
Indoor unit
control PC board
12 V
Connector
1
on/off
2
*33ft.
(10m)
* Make the distance from the PC board to the connected unit within 33ft. (10m).
Operation
Heating
operation
Stop
ON
Indoor unit fan
OFF
ON
Output signal
OFF
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
Compact Cassette
-
Connected unit
Ex.) Heater
Ex.) Relay unit
Relay
power
supply
Signal
Locally purchased
1min
CAUTION
Compact Cassette
― External control set
― UTD-ECS5A
- (01 - 122) -
Slim Duct Wall Mounted
CN10 ―
Tr-Ts = -2°F( -1°C)
Tr-Ts = -20°F( -10°C)
Relay spec.:
Rated 12V DC, 50mA to less.
Supply air
Slim Duct Wall Mounted
―
―
Floor
―
Tr-Ts
OFF
Tr-Ts = -6°F( -3°C)
ON
Tr-Ts = -24°F( -12°C)
OFF
External
Indoor unit
Heater
Return air
Floor
―
―