Emerson SERIES 600T Manuel D’Utilisation

Page de 168
Maintenance
76
7.6
Optional Air Filters
The optional air filters must be inspected and serviced on a regular schedule. The period between 
inspections will depend upon environmental conditions. Under normal conditions, the air filters will 
require cleaning or replacement approximately every 12 months.
Abnormal or dusty conditions will require more-frequent cleaning and replacement of air filters 
(sometimes as often as every two months). Inspect installations in new buildings more often, then 
extend the inspection period as experience dictates.
7.7
Torque Requirements
All electrical connections must be tight. Table 12 provides the torque values for the connections in 
the Liebert FS. Use these values unless the equipment is labeled otherwise.
7.8
Detecting Trouble
It is important that the operator check the instrument readings if abnormal equipment performance 
is suspected. Any metered value that differs appreciably from normal could mean an impending mal-
function and should be investigated.
Items to check include:
• Alarm messages indicate malfunction or impending malfunction. A daily check of the operator 
control panel will help to provide an early detection of problems. Refer to Table 16 to interpret 
alarm messages.
• Tracing a problem to a particular section is facilitated by alarm messages and the metered 
parameter indications. These are stored in the Status Reports and can be displayed at the opera-
tor control panel or at an optional terminal. A Liebert Global Services engineer will be familiar 
with test points inside the unit.
!
CAUTION
Be certain recyclable filter elements are dry before reinstalling them in the Liebert FS.
Table 12
Torque specifications (unless otherwise labeled)
Nut And Bolt Combinations
Bolt Shaft Size
Grade 2
Standard
Electrical Connections
With Belleville Washers
Lb-in
N-m
Lb-in
N-m
1/4
53
6.0
46
5.2
5/16
107
12
60
6.8
3/8
192
22
95
11
1/2
428
48
256
29
Circuit Breakers with Compression Lugs (For Power Wiring)
Current Rating
Lb-in
N-m
250A
250
28
Circuit Breakers with Compression Lugs (For Control Wiring)
AWG Wire Size or Range
Lb-in
N-m
#22 - #14
3.5 to 5.3
0.4 to 0.6