48
AWR-MTD2-XE
EN 11/2010
CONTROL AND OPERATING CHARACTERISTICS
A
Temperature control
The heating or cooling circuit water temperature is calculat-
ed by the controller and depends on the following factors:
A
) system water set point compensation in heating or cool-
ing (see paragraph)
B
) room temperature influence (see paragraph)
C
) minimum and maximum heating water temperature limit
(see paragraph)
D
) room temperature set point
The compensation curves in HEATING are divided into:
• SYSTEM curve: determines the set point for heat pump ope-
ration and any high temperature zones. The set point calcu-
lated refers to the heat pump return water temperature.
The water outlet temperature is usually 5°C higher than
the return temperature.
This temperature difference may change depending on the
flow-rate and the type of system.
Make sure that the temperature difference is within the
limits required by the manufacturer.
• ZONE curve determines the water outlet temperature in
the mixed circuit.
For systems configured with mixed zones, the SYSTEM
curve and ZONE curve must be selected.
The system and zone curve work in cascading, the mixed
zone curve may therefore not request a higher value than
the one supplied by the system curve.
A) System water temperature set point compensation
The water temperature set point in heating or cooling is cal-
culated based on the outside temperature trend according to
settable curves.
Water set point compensation diagram in HEATING
The compensation curve in heating mode can be modified
to allow correct heat pump operation depending on the heat-
ing system used (radiant panels, radiators, fan coils).
Example: Selecting heating curve 1.4 with an outside air
temperature of -5°C gives a water temperature of +55°C.
A heating curve that is too high gives an excessive outlet
temperature, a curve that is too low may mean the desired
room temperature is not reached.
The curve can be set separately for each zone, depending
on the type of room terminal.
The following compensation curves are recommended:
-25
-5
Water set point °C
Outside air temp. °C
2,2
2
1,8
1,6
1,4
1,2
1
0,8
0,6
0,4
0,2
Type of terminal
Compensation curve number
Radiant panels
0.25÷0.7
Fan coils
0,9÷1,1
Radiators
1,2÷1,5
Description
Enable SYSTEM compensation
curve
0= Disabled
1= Enabled
SYSTEM compensation curve
number
Enable compensation curve zone
LT1
0= Disabled
1= Enabled
Compensation curve number zone LT1
Enable compensation curve zone
LT2
0= Disabled
1= Enabled
Compensation curve number zone LT2
Enable compensation curve zone
LT3
0= Disabled
1= Enabled
Compensation curve number zone LT3
Menu
Mn01
Mn01
Mn01
Mn01
Mn01
Mn01
Mn01
Mn01
Parameter
no.
0152
0159
0167
0174
0182
0189
015E
012A
Default
0
0,8
0
0,7
0
0,7
0
0,7
UOM
Содержание AWR-MTD2-XE
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