Technical data

46 i-KI MTD / i-KIR MTD EN 10/2010
CONTROL AND OPERATING CHARACTERISTICS
A
Temperature control
The heating or cooling circuit water outlet temperature is
calculated by the controller and depends on the following
factors:
A) system outlet set point compensation in heating or cool-
ing (see paragraph)
B) room temperature influence (see paragraph)
C) minimum and maximum outlet temperature limit (see
paragraph)
D) room temperature set point
The compensation curves in HEATING are divided into:
• SYSTEM curve determines the general water outlet tem-
perature to the terminal units.
• 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 outlet temperature set point compen-
sation
The water outlet temperature set point in heating or cooling
is calculated based on the outside temperature trend accord-
ing to settable curves.
Water outlet set point compensation diagram in HEAT-
ING
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 outlet 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
Outlet 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
1
0
0,7
0
0,7
0
0,7
UOM