Carel E2V S0 Series - Page 22

Code +030220215- rel. 1.4 – 25.04.2007-
21
AIR-CONDITIONERS - CHILLERS
Plate
evaporator
Tube bundle
evaporator
Finned coil
evaporator
SHset
Superheat set point °C 6 6 6
K prop
PID: proportional gain - 3 5 10
Ti
PID: integration time sec 40 60 100
PID
Td
PID: derivative time sec 1 1 2
LowSH
LowSH prot.: threshold °C 2 2 2
LowSH Ti
LowSH prot.: integration time sec 2.5 2.5 10
LOP
3
LOP prot.: threshold °C -5 -5 -5
LOP Ti
LOP prot.: integration time sec 4 4 10
MOP
MOP prot.: threshold °C 12 12 12
MOP Ti
MOP prot.: integration time sec 10 10 20
MOP HiTsurr
MOP prot.: maximum
superheated gas temperature
limit
°C 30 30 30
MOP Delay
MOP prot.: activation delay at
start
sec 30 30 30
HiTcond
HiTcond prot.: threshold °C 60 60 60
PROTECTOR
S
HiTcond Ti
4
HiTcond prot.: integration time sec 10 10 20
Tab. 8.c – Recommended parameters for AIR-CONDITIONERS – CHILLERS
AIR-CONDITIONERS - CHILLERS
Variable cooling capacity (steps,
inverter)
Perturbed
system
SHset
Superheat set point °C 6 6
K prop
PID: proportional gain - 15 20
Ti
PID: integration time sec 150 100
PID
Td
PID: derivative time sec 5 15
LowSH
LowSH prot.: threshold °C 2 2
LowSH Ti
LowSH prot.: integration
time
sec 10 15
LOP
2
LOP prot.: threshold °C -5 -5
LOP Ti
LOP prot.: integration time sec 10 15
MOP
MOP prot.: threshold °C 12 12
MOP Ti
MOP prot.: integration time sec 20 30
MOP HiTsurr
MOP prot.: maximum
superheated gas
temperature limit
°C 30 30
MOP Delay
MOP prot.: activation delay
at start
sec 30 30
HiTcond
HiTcond prot.: threshold °C 60 60
PROTECTOR
S
HiTcond Ti
3
HiTcond prot.: integration
time
sec 20 30
Tab. 8.d – Recommended parameters for AIR-CONDITIONERS - CHILLERS (continued)
3
The LOP threshold is set between the limit of the low pressure switch and the design evaporation temperature. If using a water-
glycol mix, the threshold must be adapted to values that are ate least 5 °C lower than the evaporation temperature.
4
The HiTcond protection can only be enabled if the condenser probe is connected to the driver and its value is sent via LAN.
Otherwise the Integration time must be set to 0.
control