Carel µC2 User Manual

47
r18
50
40
30
20
10
r18
1
2
3
4
5
6
7
E N G L I S H
µC
2
- +030220731 - rel. 1.2 - 26.10.2007
- Minimum Cooling set point
r13: Establishes the minimum limit for setting the Cooling set point.
- Maximum Cooling set point
r14: Establishes the maximum limit for setting the Cooling set point.
- Minimum heating set point
r15: Establishes the minimum limit for setting the heating set point.
- Maximum heating set point
r16: Establishes the maximum limit for setting the heating set point.
- Cooling compensation constant (chiller mode):
r17: Sets the coefficient that controls the cooling compensation algorithm. In cooling mode, if r17 is
positive, the set point increases as the outside temperature increases (measured by the outside probe); if
on the other hand r17 is negative the set point decreases as the outside temperature increases.
This difference in the set point from the set value can have a maximum absolute value equal to the set
-
ting of r18. The values for the parameters shown on the graph are: r17=±2, r01=25, r19=32 and r18=5).
Key:
1. temperature;
2. time;
3. external temperature (probe B3/B4);
4. comp. start temperature (r19);
5. positive compensation (r17= 2);
6. set point (r1);
7. negative compensation (r17=-2).
Fig. 5.b.i
- Maximum deviation from the set point
r18: Indicates the maximum deviation from the set point beyond which compensation is stopped (maxi-
mum and minimum limits in reference to the set point).
- Start compensation temperature in cooling (outside probe)
r19: Sets the temperature (measured by the outside probe) above which the compensation function
starts (cooling), value between -40T80 °C.
- Start compensation temperature in heating (outside probe)
r20: Sets the temperature (measured by the outside probe) below which the compensation function
starts (heating), the value must be between -40T80 °C.
- Second cooling set point from external contact
r21: Represents the alternative to r01 if an associated digital input is closed (see parameter P08), between
r13 and r14.
- Second heating set point from external contact
r22: Represents the alternative to r03 if an associated digital input is closed (see parameter P08), between
r15 and r16.

Carel µC2 Specifications

General

Brand	Carel
Model	µC2
Category	Controller
Language	English