Vertiv Liebert AHU - System Operation and Maintenance; Routine Maintenance Inspection Items (Monthly)

System Operation and Maintenance 46
5 System Operation and Maintenance
Regular system maintenance is critical to ensure the reliability and eectiveness of the product. This chapter describes
AHU system maintenance, the content includes routine maintenance inspection items, check the electrical connections,
control devices visual inspection, filter maintenance guide.
During the running of AHU, there may be lethal voltage within the device. The system must
therefore comply with all cautions and warnings mentioned in this manual or which may cause
casualties.
Only qualified service and maintenance personnel can perform system operation and maintenance.
Note: Only qualified service and maintenance personnel can perform system operation and maintenance.
5.1. Routine Maintenance Inspection Items (Monthly)
Table 5-1 shows the system components that need to be checked monthly for signs of wear and tear. The inspection also
takes into consideration whether the components function correctly.
Table 5-1 Monthly Routine Check List of Items
Parts Items for inspection Inspection Results Remark
Screen
Check whether the screen is damaged or blocked
Check whether the dierential pressure valve of the
screen is within a reasonable range
Clean the screen
Chilled water coil
Check whether the coil is leaked
Check whether there is dust and foreign objects in
the water pan
Check whether there are foreign objects on the coil
Check whether the water pan is blocked
Listen to the running sound
Observe the running vibration
Water valve
Check whether the indicator of the two-way valve
flashes in green
Listen to the water flow of the two-way valve for any
abnormal noise
Observe the vibrating status of the two-way valve
Check the water flow
Check the hydraulic resistance
Fan
Check whether there is deformation on the fan
impeller
Check whether the fan and fan shroud is firmly fixed