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FusionCol8000-E240 Modular Indirect Evaporative
Cooling System
User Manual
Table 4-6 Signal table
No.
1
2
3
4
5
6
7
8
Procedure
Step 1 Connect one end of the water sensor cable to the water sensor.
Step 2 Route the signal cable through the signal cable hole at the bottom of the electric
control box.
Step 3 Connect the signal cable to X502 terminals 1 and 2.
Issue 03 (2021-04-20)
X501
X502
Smoke
Water sensor
sensor
Smoke
Water sensor
sensor
Remote
Fresh air
startup/
supply damper
shutdown
24 V DC
Remote
Fresh air
startup/
supply damper
shutdown
GND
Common
Fresh air
alarm 1+
supply damper
U (feedback)
Common
Fresh air
alarm 1–
supply damper
Y (control)
Common
Reserved
alarm 2+
Common
Reserved
alarm 2–
Copyright © Huawei Digital Power Technologies Co., Ltd.
4 System Installation (Building Scenario)
X504
Outdoor exhaust air
damper 24 V DC
Outdoor exhaust air
damper GND
Outdoor exhaust air
damper U (feedback)
Outdoor exhaust air
damper Y (control)
Indoor supply air
damper 24 V DC
Indoor supply air
damper GND
Indoor supply air
damper U (feedback)
Indoor supply air
damper Y (control)
X505
Indoor return air
damper 24 V DC
Indoor return air
damper GND
Indoor return air
damper U
(feedback)
Indoor return air
damper Y
(control)
Fresh air exhaust
damper 24 V DC
Fresh air exhaust
damper GND
Fresh air exhaust
damper U
(feedback)
Fresh air exhaust
damper Y
(control)
52
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