Carel ?C2SE User Manual

54
r01 r01 + r29
on
off
r01 r01 + r02
on
off
r03 - r04 r03
on
off
r03 - r30 r03
on
off
1 2
3
5 5
5 5
4
r32-r33
hoot keep hoot start
r32
ON
OFF
1
2
ENGLISH
µC
2
SE - +030220426 - rel. 2.1 - 09.06.2010
- Cooling set point in dehumidi cation
r26:
Alternative set point to r01 when the dehumidi cation function is active, as sent to the
µC2SE by the terminal.
The di erential remains the same as for chiller mode (r02).
- Bu er tank suppression (low load)
r27: The low load condition is determined when only one compressor is started and then is
stopped after operating for less than the time set for parameter r28.
The settings are:
r27=0: the function is disabled;
r27=1: enabled only in chiller mode;
r27=2: enabled only in heat pump mode;
r27=3: enabled in chiller and heat pump modes.
- Minimum compressor on time to determine low load condition
r28: This parameter represents the minimum compressor on time below which the low load
condition is determined. Whenever the compressor stops, the controller analyses the load status.
If already in low load condition, the time considered by the controller for the analysis becomes
“r28 x r29: r02” in chiller mode, or “r28 x r30 : r04” in heat pump mode.
This parameter also has the meaning of damper travel time when freecooling/heating is enabled.
When the sum of the opening times reaches 2*damper travel time, the damper is no longer
moved. The sum is reset when the damper is closing. Operation is the same in closing.
- Di erential during the low load condition in chiller mode
r29: This parameter represents the new di erential considered by the controller in chiller mode
during the low load condition.
Speci cally, r02 is replaced by r29.
This also has the meaning of freecooling di erential.
- Di erential during the low load condition in heat pump mode
r30: This parameter represents the new di erential considered by the controller in heat pump
mode during the low load condition.
Speci cally, r04 is replaced by r30.
This also has the meaning of freeheating di erential.
Fig. 5.b.m
Fig. 5.b.n
Key:
1. chiller;
2. chiller in low load;
3. heat pump;
4. heat pump in low load;
5. temperature.
- Heating compensation constant (mode Heat pump)
r31: Sets the coe cient that controls the heating compensation algorithm. In heating mode,
if r31 is positive, the set point decreases as the outside temperature decreases (measured by
the outside probe); if, on the other hand, r31 is negative, the set point increases as the outside
temperature decreases. This maximum deviation of the set point from the set value is equal to
parameter r18. See, for example, parameter r17.
- Set point B2 in hot start
r32:
The fan, after reaching the hot start set point, cannot be stopped if at least one compressor is
on or the electric heaters are operating.
-
Hot start di erential
r33: Hot start di erential
Key:
1. outlet fan;
2. probe B2.
Fig. 5.b.o
Hot keep/hot start example

Carel ?C2SE Specifications

General

Brand	Carel
Model	?C2SE
Category	Control Unit
Language	English