Huawei NetCol5000-C User Manual page 135

NetCol5000-C Chilled Water-Cooled In-Row Precision
Air Conditioner
User Manual
Context
Recommended tools and materials: Phillips screwdriver, flat-head screwdriver, torque wrench
and insulation cotton
Preparations: stop supply chilled water and power, adjustment the chiller water valve
openness to 0
Procedure
Step 1 Remove the rear door and air filters.
Step 2 Remove the screws at the bottom of the chilled water valve controller, the cover, and the
signal and power cables.
Step 3 If only the chilled water valve controller needs to be replaced, remove the screws fastening
the chilled water valve controller using the flat-head screwdriver and remove the controller
according to the arrow direction.
Step 4 If the chilled water valve needs to be replaced, cut the insulation cotton wrapped the chilled
water valve, and remove the four screws that connect the chilled water valve and the support
using a Phillips screwdriver.
Step 5 Remove the chilled water valve controller, shaft, and support.
Step 6 Remove the three adjustable nuts that connect the chilled water valve and the pipe using a
torque wrench, and remove the chilled water valve, as shown in
Step 7 Replace the chilled water valve controller or the chilled water valve.
Step 8 Fasten the adjustable nuts using a torque wrench to a torque of 60 N.m and wrap the chilled
water valve with insulation cotton.
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Step 9 Connect cables to the chilled water valve controller and install the controller shell.
Step 10 Install the air filter and rear door.
Step 11 Tap Maint > Performance Maint on the home screen to enter the performance maintenance
screen, and clear accumulated running time of chilled water valve.
Issue 02 (2013-12-10)
If only the chilled water valve controller is replaced, only the screws fastening the
controller needs to be secured and the securing card at the bottom needs to be tightened.
If the chilled water valve is replaced, install the new chilled water valve according to the
preceding steps.
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6 System Operation and Maintenance
Figure 6-12.
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