Rheem RIDH09AVFJ Design & Technical Manual page 35

 
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 72 °F (22 °C);
▪ and Room Temperature (Tr) increase above 52 °F
(12°C), signal output is on.
▪ and Room Temperature (Tr) increase above 70 °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)
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 PC board.
 
Circuit diagram example
Indoor unit
control PC board
12 V
Connector
1
On/Off
2
33 ft.*
(10 m)
*: Make the distance from the PC board to the connected unit within 33 ft. (10 m
Relay spec. : Rated DC 12 V, 50 mA or less.
Operation
Heating
operation
Stop
ON
Indoor unit fan
OFF
ON
Output signal
OFF
Place an external heater between the indoor unit
and the outlet.
Be sure to use delay control of the fan.
 
Parts (Optional)
Model name
Wire (Heater output)
Connected unit
Ex.) Heater
Ex.) Relay unit
Signal
Field supply
! CAUTION
- (01 - 32) -
OFF
Tr-Ts = -2 °F (-1 °C)
ON
Tr-Ts = -20 °F (-10 °C)
OFF
Relay
power
supply
1min
External
Heater
Supply air
Tr-Ts
Tr-Ts = -6 °F (-3 °C)
Tr-Ts = -24 °F (-12°C)
Indoor unit
Return air