ALPHABETIC REFERENCE EXCEL CARE CONTROL ICONS
74-5577–33 (US) 178
EN2B-0184 GE51 R0518 (Europe)
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The diagram plots the development of the room temperature at the point of the
heating switch-on time until it reaches the room temperature setpoint. You can draw
this type of characteristic curve by recording the room temperature (analog input at
the controller) and outputting this value to a plotter via an analog output with the
characteristic curve 0 through 50 °C = 0 through 10V. You need to record separate
characteristic curves for preheat after a short cool-down and after a lengthy cool-
down.
When operating EOH3 with a room sensor, you can define dead times and time
constants with the corresponding parameters. If you select ´Disabled` for adaptation
in the internal parameters dialog box (parameter P12 = 0), these parameters remain
valid.
If you select ´Enabled´ (parameter P12 = 1) or ´Restart` for adaptation (parameter
P12 = 2), EOH3 determines dead time and time constants automatically from the
actual temperature development during the preheat phase. EOH3 weights the new
values and uses them to correct the old parameter values.
If the mode is ´Restart´ then the EOH3 automatically switches the mode of operation
to ´Enabled` (P12 = 1). While enabled, the room model time constants are
continuously improved at the end of every optimize start phase.
Heating curve adaptation
The heating curve slope adaptation has the following settings:
• 0 = no adaptation
• 1 = adaptive
• 2 = adaptation new start
• 3 = adaptation refreshed new start
• 4 = direct RMT compensation
If any type of adaptation is set, no direct room temperature compensation of the flow
temperature setpoint is possible.
The heating curve slope adaptation is enabled if all the following conditions are true
for 6 hours or longer:
• adaptation enable input = 1
• no optimum start
• no optimum stop
• the room temperature setpoint is above 18 °C and above occupied/unoccupied
changeover (P20)
• the outdoor temperature is < 15°C
• the supply water temperature is >= 20°C
room sensor is available (input value >= -20 °C and <= 50°C)
Note:
The external calculated conditions described below have to be considered and
connected to the input adaptation enable (AdaEn).
External conditions can be, for e.g.
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