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English 13
11-1 Three main operation methods are available:
• Basic
The refrigerant temperature is fixed independent from the situation.
It corresponds to the standard operation which is known and can be
expected from/under previous systems:
• To activate this operation method under cooling operation:
change field setting [2-8]=2.
• To activate this operation method under heating operation:
change field setting [2-9]=2.
• Automatic (default)
The refrigerant temperature is set depending on the outdoor ambient
conditions. As such adjusting the refrigerant temperature to match the
required load (which is also related to the outdoor ambient conditions).
E.g., when your system is operating in cooling, you do not need as much
cooling under low outdoor ambient temperatures (e.g., 77°F (25°C)) as
under high outdoor ambient temperatures (e.g., 95°F (35°C)).
Using this idea, the system automatically starts increasing its refrig-
erant temperature, automatically reducing the delivered capacity
and increasing the system’s efficiency.
• To activate this operation method under cooling operation:
change field setting [2-8]=3 (default).
E.g., when your system is operating in heating, you do not need as much
heating under high outdoor ambient temperatures (e.g., 59°F (15°C)) as
under low outdoor ambient temperatures (e.g., 23°F (-5°C)).
Using this idea, the system automatically starts decreasing its refrig-
erant temperature, automatically reducing the delivered capacity
and increasing the system’s efficiency.
• To activate this operation method under heating operation:
change field setting [2-9]=1 (default).
• Hi-sensible (cooling)
The refrigerant temperature is set higher (cooling) compared to
basic operation. The focus under high sensible mode is improved
comfort for the customer.
The selection method of indoor units is important and has to be con-
sidered as the available capacity is not the same as under basic
operation. For details concerning to Hi-sensible applications, please
contact your dealer.
•
To activate this setting under cooling operation: change field set-
ting [2-8] to the appropriate value, matching the requirements of
the pre-designed system containing a high
sensible solution.
11-2 Several comfort settings are available
For each of above modes a comfort level can be selected. The comfort
level is related to the timing and the effort (energy consumption) which
is put in achieving a certain room temperature by temporarily changing
the refrigerant temperature to different values in order to achieve
requested conditions more quickly.
• Powerful
Overshoot (during heating operation) or undershoot (during cooling
operation) is allowed compared to the requested refrigerant temper-
ature, in order to achieve the required room temperature very fast.
The overshoot is allowed from the start up moment.
In case of cooling operation the evaporating temperature is allowed
to go down to 37°F (3°C) on temporary base depending on the situ-
ation.
In case of heating operation the condense temperature is allowed to
go up to 120°F (49°C) on temporary base depending on the situation.
When the request from the indoor units becomes more moderate,
the system will eventually go to the steady state condition which is
defined by the operation method above.
• To activate the powerful comfort setting under cooling opera-
tion, change field setting [2-41]=3.
This setting is used in conjunction with setting [2-8].
• To activate the powerful comfort setting under heating opera-
tion, change field setting [2-42]=3.
This setting is used in conjunction with setting [2-9].
• Quick
Overshoot (during heating operation) or undershoot (during cooling
operation) is allowed compared to the requested refrigerant temper-
ature, in order to achieve the required room temperature very fast.
The overshoot is allowed from the start up moment.
In case of cooling operation the evaporating temperature is allowed to
go down to 43°F (6°C) on temporary base depending on the situation.
In case of heating operation the condense temperature is allowed to
go up to 115°F (46°C) on temporary base depending on the situation.
When the request from the indoor units becomes more moderate,
the system will eventually go to the steady state condition which is
defined by the operation method above.
• To activate the quick comfort setting under cooling operation,
change field setting [2-41]=2.
This setting is used in conjunction with setting [2-8].
• To activate the quick comfort setting under heating operation,
change field setting [2-42]=2.
This setting is used in conjunction with setting [2-9].
• Mild
Overshoot (during heating operation) or undershoot (during cooling
operation) is allowed compared to the requested refrigerant temper-
ature, in order to achieve the required room temperature very
fast. The overshoot is not allowed from the start up moment. The
start up occurs under the condition which is defined by the operation
mode above.
In case of cooling operation the evaporating temperature is allowed to
go down to 43°F (6°C) on temporary base depending on the situation.
In case of heating operation the condense temperature is allowed to
go up to 115°F (46°C) on temporary base depending on the situation.
When the request from the indoor units becomes more moderate,
the system will eventually go to the steady state condition which is
defined by the operation method above.
The start up condition is different from the powerful and quick com-
fort setting.
• To activate the mild comfort setting under cooling operation,
change field setting [2-41]=1.
This setting is used in conjunction with setting [2-8].
• To activate the mild comfort setting under heating operation,
change field setting [2-42]=1.
This setting is used in conjunction with setting [2-9].
• Eco
The original refrigerant temperature target, which is defined by the
operation method (see above) is kept without any correction, unless
for protection control.
• To activate the mild comfort setting under cooling operation,
change field setting [2-41]=0.
This setting is used in conjunction with setting [2-8].
• To activate the mild comfort setting under heating operation,
change field setting [2-42]=0.
This setting is used in conjunction with setting [2-9].
No matter which control is selected, variations on the behavior of the
system are still possible due to protection controls to keep the unit oper-
ating under reliable conditions. The intentional target, however, is fixed
and will be used to obtain the best balance between energy consump-
tion and comfort, depending on the application type.
Value To target
4 46°F (8°C)
548°F (9°C)
6 50°F (10°C)
7 52°F (11°C)
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