Samsung AM080FX A Series Service Manual page 390

Key Options
8-5 Applications (cont.)
8-5-3 Application of Auxiliary Heat Module (cont.)
Auxiliary Heat Sequence of Operation
When a call for heat occurs, the indoor unit will energize internal heat.
The auxiliary contact will energize as described:
• If Digit 18 is set to 0, 1, or 2, after an appropriate time delay, auxiliary heat will energize. Auxiliary heat will remain in operation
until the indoor unit heat set point is satisfied.
• If Digit 18 is set to 3, 4, or 5, the auxiliary heat will remain unenergized until calls for heat and minimum temperature offset are
received. On receiving calls for heat and minimum temperature offset, auxiliary heat will energize after the selected time delay.
Auxiliary heat will remain in operation until the temperature offset has been satisfied. The indoor unit will continue to operate
without regard to auxiliary heat until the indoor unit heat set point is satisfied.
Samsung Electronics
Figure 4. External contact interface module: wiring diagram for auxiliary heat
Do not use contacts 1 and 2.
Note: Do not directly connect module to external
contact. Use correctly sized external relays.
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