Technibel iSeries Technical Data & Service Manual page 16

Dehumidification (dry) mode
When the unit is in dry mode, the system will operate according to the following table:
RAT
≥ SPT + 2°C
< SPT + 2°C
≥ SPT - 1°C
< SPT - 1°C
≥ 10°C
< 10°C
Notes:
When dry mode is active, the temperature of the room could decrease below the setpoint
-
temperature if the thermal load of the room is low.
During dry mode, 4-way valve is deactivated.
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Auto mode
When the unit is in auto mode (auto cooling or auto heating), the system will switch between heating
and cooling mode to maintain the room air temperature (RAT) to the set point temperature (SPT).
The system will switch between heating and cooling mode if one of the following conditions is met:
Heating if at least 3 minutes have passed since the compressor was stopped and ∆T ≤ -3
Cooling
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Heating if at least 1 hour have passed since the compressor was stopped and ∆T ≤ -1
Cooling
-
Cooling if at least 3 minutes have passed since the compressor was stopped and ∆T ≥ 3
Heating
-
Cooling if at least 1 hour have passed since the compressor was stopped and ∆T ≥ 1
Heating
-
where:
∆T = RAT – SPT
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Fan mode
When system is in fan mode:
Compressor and fan are stopped.
-
4-way valve is deactivated
-
Indoor fan runs at the selected speed
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DRY LEVEL
0 Unit operates normally in cooling mode.
Unit operates with a fixed cooling demand.
1 Indoor fan switches between very low speed and
low speed every 30 seconds.
Unit cycles between a period of operation with a
fixed cooling demand (3 minutes) and a period of
non operation (9 minutes).
2
Indoor fan switches between very low speed and
low speed every 30 seconds.
DRY OFF Unit is off.
DESCRIPTION