Swegon WCD2 Pacific User manual

WCD2 PACIFIC
Installation – Condensation sensor 20170918
General description of the Condensation Sensor WCD2 Pacific
The Sensor WCD2 Pacific is designed to meet the requirements to provide early warning of condensing conditions.
In case of a problem with the system the sensor is used as a safeguard to avoid condensation from the chilled beam.
The sensor operates on dew point temperature rather than a fixed value of relative humidity.
The dew point is calculated from a temperature compensated RH element and a high accuracy thermistor which are
thermally bonded to the metal plate of the sensor.
The volt-free contact relay in the sensor is activated when the dew point temperature is below the calculated dew point
temperature (there is a safety factor included in the calculated dew point). NOTE: the sensor should be mounted on
incomming cooling water pipe and close to the coil.
LED Indication.
The red LED, visible through the top of the housing, has 4 functions.
1. Short blink once every 15 seconds to show the device is working properly
2. Rapid continuous blinking to show the dew point switching set point is close
3. Continuously ON when the output is switched on.
4. On long flash followed by 2 short flashes to show the temperature element is faulty.
2
1
3

WCD2 PACIFIC
2Swegon reserves the right to alter specications. 2017-09-18
max
To connect the condensation sensor on a cupper pipe.
3
1
2
Note! The sensor should be mounted
on the supply cooling water pipe as
close as possible to the coil.

3
2017-09-18 Swegon reserves the right to alter specications.
WCD2 PACIFIC
3
max
To connect the condensation sensor on a connection nut (when PEX tubing is used).
2
1
Note! The sensor should be mounted
on the supply cooling water pipe as
close as possible to the coil.

WCD2 PACIFIC
4Swegon reserves the right to alter specications. 2017-09-18
To connect condensation sensor WCD2 to PACIFIC with CONDUCTOR
3
3
Condensation sensor
WCD2
17 Green
18 Yellow
21 Red
22 Blue

5
2017-09-18 Swegon reserves the right to alter specications.
WCD2 PACIFIC
To connect condensation sensor WCD2 to PACIFIC with URC1
3
Condensation sensor
WCD2
3Green
4Yellow
9Red
10 Blue

WCD2 PACIFIC
6Swegon reserves the right to alter specications. 2017-09-18
To connect condensation sensor to PACIFIC with LUNA
Colour Plinth
Condensation
sensor
WCD2
Blue G0
Red G
Green CONDENS
Yellow SENSOR
Colour LUNA RE-S
Condensation
sensor
WCD2
Blue 6
Red 5
Green 6
Yellow 8
33
24 V AC
1
2
3
4
5
6
7
8
Y1
Y1G
Y2G
Y2
G
G0
I1
I2
24 V AC
/CCO ~24 V AC
G0 0-10V DC 24V G0 0-10V DC 24V G G0 SENSOR CONDENS