Rheem RHMV2421MNACJA Service Manual page 183

 Installation configuration of individual connection
External heating device is installed individually. (No use of indoor unit fan)
WARNING
• DIP Switch 101-3 must be in the ON position when ducted electric heat application is be-
ing used. DIP switch 101-3 is set in the ON position by default from the factory. When DIP
switch 101-3 is in the ON position and ducted electric heat application is not being used, cold
draft occurs due to fan delay off operation.
Operation
DIP-SW101-3
Indoor unit fan
setting for
external heater
Heater off
DIP-SW101-3
Indoor unit fan
setting for
external heater
• Design and install external heater appropriately with considering its protection.
• Inappropriate designing and installation of external heater may cause a fire by emitted heat from
the external heater.
4-4. Details of function
Example of heating device:
- Floor heating device
On • Heater is off as shown in following diagram of heating
temperature.
• Other than heating mode
Enabled • Error occurred
• Forced thermostat off
• Fan stop protection
Off • Heater is off as shown in following diagram of heating
temperature.
• Other than heating mode
Disabled
• Error occurred
• Forced thermostat off
CN47
External
heater
Supply air
- (05-35) -
On/Off
Condition
CN5 CN65
Indoor
unit
Return air
4. External input and output