Huawei NetCol8000-C User Manual page 104

NetCol8000-C(070-260) In-room Chilled Water Smart
Cooling Product
User Manual
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Issue 06 (2020-01-13)
Definition Function
alarm if a smoke or water alarm occurs.
When DO associated alarm is set to Critical&major
ALM, the smart cooling product issues an alarm if a
critical alarm occurs.
Normal Open signal dry contact output. Connection to an
outdoor device is forbidden.
Common alarm 2 When DO associated alarm is set to Critical&major
terminal ALM, the smart cooling product issues an alarm if a major
alarm occurs.
Normal Open signal dry contact output. Connection to an
outdoor device is forbidden.
Water leakage Terminals X2.9 and X2.10 are connected to the water
sensor terminal leakage sensor. If water leaks, the smart cooling product
generates an alarm.
Direct free-cooling Terminals X2.11–X2.14 are connected to the direct
plenum YV1 free-cooling plenum actuator to open and close the direct
terminal free-cooling plenum. The direct free-cooling plenum is
used together with return air damper YV2. The fresh air
function needs to be enabled.

Return air damper
YV2
terminal/motorized
damper YV3
terminal

Note: Functions of the direct free-cooling plenum and
motorized damper are mutually exclusive.
Differential pressure Terminals X2.19–X2.21 connect to the differential pressure
sensor terminal sensor. The fan works in pressure control mode based on
the data detected by the differential pressure sensor.
Water valve Terminals X2.22–X2.25 are connected before delivery, and
actuator terminal do not need to be connected onsite.
Reserved 24 V DC Terminal X2.26 is reserved.
terminal
Differential pressure Terminals X2.27–X2.28 are connected to the differential
switch terminal of pressure switch of the fresh air filter to generate alarms
the fresh air filter when the fresh air filter is blocked.
Note: The terminal applies only to downflow units.
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Return air damper YV2: Terminals X2.15–X2.18 are
connected to the return air damper actuator to open and
close the return air damper. The return air damper is
used together with the direct free-cooling plenum. The
fresh air function needs to be enabled.
Motorized damper YV3: Terminals X2.15–X2.18 are
connected to the motorized damper actuator. The
motorized damper needs to be enabled.
3 Installation Guide
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