REMKO KWL 130 H - Manual (Page 10)

Target value input cooling mode
Programming target values
Adaptive cooling and heating function
The input of the target values for summer mode (cooling mode) and the transition mode (heating mode only
for units with HP function) takes place on the user level. The following diagrams provide simplified illustrations
of the operating principles.
Using the SET key, the set value can be displayed during stand-by or
cooling mode. To change the set value, press the SET key for approx. 5
seconds. The display begins to blink. With the or keys the value can
be adjusted within the limits defined at the factory (St 05 + St 06).
St 05 = 10.0 °C
Minimum target value cooling mode
St 06 = 18.0 ℃ Maximum target value cooling mode
Factory setting = 12.5 ℃
min. 5 sec. short-term
value input open program
part
short-term
storing
If the temperature at the medium intake exceeds the target
value, the compressor switches on (A) and cooling capacity
is generated. If the calculated operating time of the com-
pressor falls below 3 minutes, an adjustment of the target
value is made. If the calculated operating time is longer
than 3 minutes, the current target value is kept. The me-
dium temperature lowers and the compressor is switched
off when the shut-off point is reached (B).
If the temperature at the medium intake exceeds the
target value, the compressor switches on (A) and heating
capacity is generated. If the calculated operating time of
the compressor falls below 3 minutes, an adjustment of
the target value is made. If the calculated operating time
is longer than 3 minutes, the current target value is kept.
The medium temperature increases and the compressor is
switched off when the shut-off point is reached (B).
Factory setting for target value
St01 = 12.5°C
Factory setting for target value
'St03 = 38.5°C
Adaptive target value
Adaptive target value
Adaptive hysteresis
Adaptive hysteresis
Factory setting for hysteresis
St02 = 3.0°C
Factory setting for hysteresis
St04 = 3.0°C
Compressor ON
Compressor ON
Compressor OFF
Compressor OFF
A
A
B
B
Temperature
Medium intake
through sensor
Pb1
Temperature
Medium intake
through sensor
Pb1
If the programmed target temperature within the system is reached quickly or only a small share of cooling or
heating capacity is accepted by the internal equipment, the operating time of the compressor decreases. An op-
erating time which is too short can have a negative long-term impact on the operation of the unit. The control-
ler continuously calculates the "Adaptive target value SEtr", so that a minimum operating time and minimum
stand-by time of the compressor of 3 minutes can be assured. In the process, the switch-on and shut-off point
of the compressor changes (hysteresis). The unit remains at this operating point until the cooling or heating
capacity accepted in the internal equipment has changed.
The adjustment of the target value has the consequence that the medium temperature can fluctuate beyond
the normal measure depending on the acceptance of the cooling or heating capacity within the system. If this
fluctuation should be decreased, the medium volume should be increased above the minimum medium volume,
e.g. through an additional storage tank.
Adaptive cooling function
Adaptive heating function
REMKO KWL (H)
10