Samsung AM072BXV Series Service Manual page 287

Piping Diagram
7-3 Functions (cont.)
7-3-3 Others (cont.)
7-3-3-1 Field Setting (cont.)
Rotation defrost
▪ Purpose
Enable continuous heating when HR modules are used.
▪ Concept
- Continuous heating is provided by performing defrost operation for each unit if HR modules are used.
- HR Only
▪ Control specifications in detail
- In heating mode, defrost operation is performed on each unit one after another according to the order of rotation priority.
(see "Rotation defrost control" for details).
Input unit Seg1
Main
▪ Notes
- Incorrect settings may seriously damage the system.
- Setting is unnecessary if high-head condition is set.
Expand operational temperature range for cooling
▪ Purpose
Extend the low temperature operation range for HR units to -15℃ .
▪ Concept
- The cooling operation range is extended by controlling purpose-specific valves on HR units.
- HR Only
▪ Control specifications in detail
- If it is difficult to secure outdoor high pressure while in cooling mode in an outdoor location with a low temperature,
formation of high pressure is facilitated by controlling the low pressure decrease, Solenoid valve.
- Main EEV, and Solenoid valve.
- Hot gas bypass.
Input unit Seg1
Main 1
▪ Notes
- Continuous cooling operation is possible even in low temperature condition up to -15℃ , but noise of the MCU will
increase.
- This option is only for HR unit.
Channel address
▪ Purpose
- Identify multiple main outdoor units connected to upper-level controllers, such as DMS and S-NET3.
▪ Concept
- If the Channel address is set, the same channel address is assigned to the sub outdoor units, indoor units,
and MCUs connected to a main outdoor unit.
▪ Control specifications in detail
Input unit Seg1
Main 1
Samsung Electronics
Seg2 Seg3
1 1
Seg2 Seg3
2
Seg2 Seg3
3
Seg4
0 0
0 1
Expand operational temperature range for
Seg4
0 0
0 1
Seg4
A U
0~15
Rotation defrost
Disabled (default)
Enabled
cooling operation (HR only)
Disabled (default)
Enabled
Channel address
Automatic setting (default)
Manual setting for channel
0 - 15
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