Carel pCO1 series Application Program

Standard air-conditioning units
Carel Cod. +030221421 – Rel. 1.2 – April, 11, 2003
25
9.0 TEMPERATURE CONTROL
The heating and cooling devices are managed based on the temperature value measured by the ambient (or room temperature) probe. The
measured temperature is compared to the set temperature (set point); the devices are enabled based on the difference between the two values.
The proportional band identifies the air-conditioning unit working range and can take different values in heating and cooling mode. The dead
zone identifies the devices non-action zone round the set point. The following diagrams show the action of the heating and cooling devices. The
percentage values indicate the modulating valves opening range. The warm and cold valves start and end opening parameters correspond to 0%
and 100% respectively (default values) and are different for the two valves; if need be, the values may be modified to delay opening start and
bring complete opening forward.
9.1 CLOSE CONTROL UNITS WITH DIRECT EXPANSION COIL
COMP.2 /
C1 capacity control
Ambient
tem
p
.
(
°C
)
0%
100%
100%
0%
Dead z. Dead z.
Cold proportional band
Warm proportional band
Temperature set
1 COMPRESSOR
19.5 22.5 23.0 23.5 26.5
COMP.1
25,0
24,2 25,0 25,7
COMP.1 C1 c.c. COMP.2 C2 c.c.
19.5 22.5 23.0 23.5 26.5
19.5 22.5 23.0 23.5 26.5
19.5 22.5 23.0 23.5 26.5
19.5 22.5 23.0
19.5 22.5 23.0
1 HEATER
HEATER 1
21.5
HEATER 2
HEATER 3
20.5 21.5
HEATER 2 HEATER 1
BINARY MANAGEMENT
0-10Volt WARM WATER VALVE
100%
0
%
Three-position valve running time
VALVOLA ACQUA CALDA 3 PUNTI
3°C 0.5°C 0.5°C 3°C
Opening start point (0%)
Opening end point
(100%)
100%
0%
Ambient
tem
p
.
(
°C
)
Ambient
tem
p
.
(
°C
)
Ambient
tem
p
.
(
°C
)
Ambient
tem
p
.
(
°C
)
HEATING
COOLING
Ambient
tem
p
.
(
°C
)

Carel pCO1 series Specifications

General

Brand	Carel
Model	pCO1 series
Category	Controller
Language	English