Removing Transport Fastener And Vibration Absorber - Liebert DM User Manual

Chapter 2 Mechanical Installation 19

2.8 Removing Transport Fastener And Vibration Absorber

In order to protect partial components from damaging and distorting due to bumping, impact and resonation, fasteners
and vibration absorbers are mounted at certain locations before delivery. Remove the fasteners and vibration
absorbers before installation and commissioning.
Removing transport fixing plate from the compressor
To reduce the compressor operation vibration and noise, the vibration absorbing cushions are added to the
compressor base. However, such device cannot best restrain the equipment vibration during the transportation,
resulting in loosened connections and wearing of certain parts. To counteract such effect, three L shaped plates are
added to the compressor base during the transportation, as shown in Figure 2-26.
Fixing plates
Figure 2-26 Compressor fixing plates
After the installation and before the commissioning, remove the three fixing plates, then restore the washers and bolts.
The fastening torque of the bolts is (12 ± 1)N . m.
Removing transport fastener of fan compoents
1. Upflow unit
The motor base of the fan is designed with a semi-free self-tension structure to minimize the fan operation noise and
prolong the belt life. During the transportation, to protect the semi-free structure from failing or collapsing due to
resonation, the upflow unit is especially fastened with bolts (left and right symmetrical, two at either side), as shown in
Figure 2-27. You should cut the binding string on the belt and remove the four fixing bolts before the power-on
operation, otherwise the fan could be damaged and even cause personal injury. Removing the bolts requires the
collaboration of two persons, with one holding the motor and the other removing the bolts.

Note
After you open the front door of unit, you will see a warning label concerning bolt removal on the sealing panel of the fan. Do
remove the bolts by following the preceding instructions.
Transportation bolts
(two on either side)
Binding string
Figure 2-27 Fixed bolts and trap wrench of transport fan components
Liebert_DM 16kW Air Conditioner User Manual