Key Options
Samsung Electronics
297
8-5-3 Application of Auxiliary Heat Module
8-5 Applications (cont.)
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Introduction of Auxiliary Heat Module
Auxiliary Heat Module Configuration
The indoor unit firmware may need to be updated depending on the date of indoor unit manufacture. Firmware installations instruc
-
tions, which can be found on Comfort site, must be followed exactly.
Important
: Avoid system failure and loss of all system programming by following firmware installation instructions exactly. Failure
to do so will cause system data to be deleted. Data is not recoverable! The unit will not function!
Using the Technician Utilities Tool (TUT) or the remote control, con-figure indoor unit options as required by customer
application. Refer to Table 2, Figure 4, and the configuration section of the indoor unit installation manual.
Table 2. Option settings for auxiliary heat
The indoor unit firmware may need to be updated depending on the date of indoor unit manufacture. Firmware installations instruc
-
tions, which can be found on Comfort site, must be followed exactly.
Option setting mode :
Digit 2=2(a)
Option setting
Example
Option 3 : Temperature offset, No delay
02xxxx 1xxxxx 2x2xxx 3xxxxx
05xxxx 1xxxxx 2xxxx3 3xxxxx
Digit 15
"2"
Option setting mode :
Digit 2=5(b)
Option setting
Terminals 3,4
Temperature offset
Time output
Digit 18
"0"
No temperature offset
No delay
"1"
+10 minute delay
"2"
+20 minute delay
"3"
Temperature offset:
2.7°F (1.5°C)+
No delay
"4"
+10 minute delay
"5"
+20 minute delay
(a) Refer to "Configuration" in the indoor unit installation manual for more details.
(b) If further temperature offsets are desired, contact technical support.
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 with
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out regard to auxiliary heat until the indoor unit heat set point is satisfied.
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.
