Carel pCO1 series Application Program

Standard air-conditioning units
Carel Cod. +030221421 – Rel. 1.2 – April, 11, 2003
30
11.2 RECOVERY WITH COOLING DEVICES ON CLOSE CONTR. UNITS WITH DIRECT EXPAN. COIL
With recovery coil enabled, the conventional cooling devices are switched on only if ambient temperature increases above a certain value;
adding the effects of recovery coil and devices together, temperature decreases, but before reaching the set point, the cooling devices are
switched off again. In this case, the cooling devices favour Recovery but do not substitute for it. The following diagram shows how the cooling
devices steps are offset compared to normal position to ensure energy saving.
11.3 RECOVERY WITH COOLING DEVICES ON CLOSE CONTROL UNITS WITH WATER COILS
The following diagram shows how the cold coil steps are offset compared to normal position to ensure energy saving.
Ambient
tem
p
.
(
°C
)
COOLING
HEAT.
0%
100%
0%
Dead z. Dead z.
Cold proportional band
Temperature set
1 COMPRESSOR
22.5 23.0 23.5 26.5
COMPR. 1
COMPR. 2 /
C1 cap control
C.1 C. 1 C.2 C.1
c. c. c. c.
23.0 23.5 24.6 24.9 26.5
23.0 23.5 24.6 24.9 25.6 26.5
23.0 23.5 24.6 24.9 25.1 25.6 26.1 26.5
0.5°C 0.5°C 3°C
RECOVERY COIL
OFF
OFF
OFF
ON
ON
ON
On
-
Off
On
-
Off
On
-
Off
0
-
10Volt
0
-
10Volt
0
-
10Volt
Ambient
tem
p
.
(
°C
)
Ambient
tem
p
.
(
°C
)
Ambient
tem
p
.
(
°C
)
Ambient
tem
p
.
(
°C
)
COOLING
HEAT.
100%
0%
Dead z. Dead z.
Cold proportional band
Temperature set
0-10V MOD. WARM VALVE
22.5 23.0 23.5 26.5
23.0 23.5 24.6 24.9 26.5
23.0 23.5 24.6 24.9 26.5
0.5°C 0.5°C 3°C
RECOVERY COIL
OFF
OFF
ON
ON
On
-
Off
On
-
Off
0
-
10Volt
0
-
10Volt
THREE-P. WARM VALVE
Ambient
tem
p
.
(
°C
)
Ambient
tem
p
.
(
°C
)
RECOVERY COIL
RECOVERY COIL
RECOVERY COIL

Carel pCO1 series Specifications

General

Brand	Carel
Model	pCO1 series
Category	Controller
Language	English