Carel pCO1 series Application Program

Standard air-conditioning units
Carel Cod. +030221421 – Rel. 1.2 – April, 11, 2003
28
10.2 OTHER HUMIDITY FUNCTIONS
The high and low humidity alarms cause alarm screen signalling and have modifiable delay time.
10.3 CLOSE CONTROL UNITS WITH WATER COILS
In these close control units, the cold water coils provide for dehumidification. The humidification devices are the same as the direct expansion
close control units ones (On-Off contact, 0-10Volt modulating signal, built-in humidifier): for any information about their operation, refer to the
previous paragraph. The following diagrams show the dehumidification devices action. The percentage values indicate the modulating valves
opening range. Please note that the dehumidification cold water coils are enabled at 100%, not in modulating mode, in case of both three-
position and 0-10Volt valves.
Ambient
humidit
y
(
%
)
DEHUM
HUMIDIFICATION
100%
100%
0%
Dehumidification proportional band
Humidification proportional band
Humidity set
VALVOLA AC
Q
UA FREDDA 0-10V
48.0 50.0 52.0
2.0% 2.0%
50.0 52.0
50.0 52.0
VALVOLA AC
Q
UA FREDDA 3 PUNTI
100%
0%
Ambient
humidit
y
(
%
)
Ambient
humidit
y
(
%
)
100%
0%
0
-
10V COLD WATER VALVE
THREE
-
P. COLD WATER VALVE
DEHUMID.
HUMIDIF.
Humidity set
40.0 48.0 50.0 52.0 60.0
Humid. band Dehum. band
Low humidit
y
alarm Hi
g
h humidit
y
alarm
2.0% 2.0%
10.0% 10.0%
Ambient
humidit
y
(
%
)

Carel pCO1 series Specifications

General

Brand	Carel
Model	pCO1 series
Category	Controller
Language	English