English
19
[2-49]= Te target temperature during simultaneous operation
Default value=5
Change [2-49]=2-7 in function of required operation method
during simultaneous operation.
[2-51]= Cooling comfort setting
Default value=1
Change [2-51]=0, 1, 2 or 3 in function of required limitation.
This setting is used in conjunction with setting [2-8].
[2-52]= Heating comfort setting
Default value=1
Change [2-52]=0, 1, 2 or 3 in function of required limitation.
This setting is used in conjunction with setting [2-9].
Several patterns are available and explained below. Modify the param-
eters to the needs of your building and to realize the best balance
between energy consumption and comfort.
12-1-1 Two main operation methods are available:
•
Automatic
The refrigerant temperature is set by default to a certain start value
(defined by field setting). Depending on the load of the indoor units,
the refrigerant temperature is adjusted. When there is a big/small
load, according behaviour to match this load is executed.
Depending on the operation mode (cooling, heating or heat recov-
ery), field settings are available to define the standard refrigerant
temperature start point. They are explained below.
E.g., when your system is operating in cooling, you do not need as
much cooling under low ambient temperatures (e.g., 77°F (25°C)) as
under high 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 based on indoor unit load
feedback.
•
To define the start value during cooling operation, change field
setting [2-8] = 5 (default; corresponding to Te = 48°F (9°C) to the
required value).
E.g., when your system is operating in heating, you do not need as
much heating under high ambient temperatures (e.g., 59°F (15°C))
as under low 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 define the start value during heating operation, change field
setting [2-9] = 3 (default; corresponding to Tc = 109°F (43°C) to
the required value).
When the system is used as a heat recovery system, the start refrig-
erant temperature during heat recovery mode for cooling can be
selected differently than during cooling operation.
To define the start value for cooling operation during heat recovery
operation, change field setting [2-49] = 5 (default; corresponding to
Te = 48°F (9°C) to the required value).
•
Hi-sensible/economic (cooling/heating)
The refrigerant temperature is set higher/lower (cooling/heating)
compared to basic operation. The focus under high sensible mode is
comfort feeling 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.
•
To activate this setting under heating operation, change field set-
ting [2-9] to the appropriate value, matching the requirements of
the pre-designed system containing a high sensible solution.
To maintain the target settings, it is required to set the comfort setting to
Eco.
The comfort modes are explained below.
12-1-2 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 situa-
tion.
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 operation,
change field setting [2-51]=3.
This setting is used in conjunction with setting [2-8].
•
To activate the powerful comfort setting under heating operation,
change field setting [2-52]=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 situ-
ation.
In case of heating operation the condense temperature is allowed to
go up to 115°F (46°C) on temporary base depending on the situa-
tion.
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 [2-51]=2.
This setting is used in conjunction with setting [2-8].
•
To activate the quick comfort setting under heating operation,
change field setting [2-52]=2.
This setting is used in conjunction with setting [2-9].
Te setting (simultaneous operation)
k k k
h h h
k
2. 43°F (6°C)
k
h h h h
k
h
3. 45°F (7°C)
k
h h h h
k k
4. 46°F (8°C)
k
h h h
k
h h
5. 48°F (9°C)(default)
k
h h h
k
h
k
∗
6. 50°F (10°C)
k
h h h
k k
h
7. 52°F (11°C)
k
h h h
k k k
Cooling comfort setting
k k k
h h
k k
0. Eco
k
h h h h h h
1. Mild (default)
k
h h h h h
k
∗
2. Quick
k
h h h h
k
h
3. Powerful
k
h h h h
k k
Heating comfort setting
k k k
h
k
h h
0. Eco
k
h h h h h h
1. Mild (default)
k
h h h h h
k
∗
2. Quick
k
h h h h
k
h
3. Powerful
k
h h h h
k k
Value [2-8]
Te target
3
45°F (7°C)
4
46°F (8°C)
5
48°F (9°C)
6
50°F (10°C)
7
52°F (11°C)
Value [2-9]
Tc target
1
106°F (41°C)
3
109°F (43°C)
01_EN_3P365916_17C.fm Page 19 Thursday, March 12, 2015 10:47 AM
Summary of Contents for RWEYQ144PCTJ
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