Installation; Basic Information For Installation; Rigid Installation; Anti-Vibration Mounting - GEA Grasso M-Series Operating Manual

Installation

6 INSTALLATION
6.1

Basic information for installation

Caution!
During the installation, make sure that
substances escaping from leaks do
not reach into the soil, groundwater or
surface water. The applicable legal
regulations must be heeded at the
place of installation (e.g.for Germany:
German Federal Water Act WHG).
All foundation calculations, the selection of materials
and the soil analysis are the designer's or owner's
responsibility.
A plan must be produced for proper and professional
assembly prior to the installation. The electrical and
operating media connections must be established. It
must be borne in mind that, in addition to the installa-
tion area of the screw compressor package, there
must be sufficient space available for the pipes as
well as for operating during maintenance activities.
Install the screw compressor package on a level sur-
face. The difference from the horizontal must not be
more than 0.3 %. Provide enough space for mainte-
nance work.
Under normal conditions, the screw compressor
package stands solidly on the installation surface
due to its own dead weight. We recommend that you
provide ribbed rubber plates for shock absorption
between the support surface and screw compressor
package feet or machine base frame.
If greater damping is required (installation on a floor
ceiling or on the roof), vibration dampers must be
provided. The appropriate type of vibration damper
must be determined and realised for this case. Also
decouple the secondary refrigerant lines using com-
pensators when vibration absorbers are used.
The welding seams must be inspected in accordance
with the Pressure Equipment Directive after welding
work by the customer or operator on pipe line con-
nections and flanges.
6.2

Rigid installation

The frame of the screw compressor unit/ liquid chiller
is placed on foundation bolts on a prepared founda-
tion. The frame must be levelled with suitable shims
such that the coarse alignment (radial and angular
26
misalignment ≤ 0.25 mm) at the coupling is attained
again. Then tighten the foundation bolts.
6.3

Anti-vibration mounting

The frame of the screw compressor unit must be
aligned with the levelling bolts until the coarse align-
ment (radial and angular misalignment (radial and
angle offset ≤ 0.25 mm) at the coupling is attained
again.
Before tightening the foundation bolts of the isola-
tors, check that the isolators over the spring (pre-
dominantly made of rubber) are free and do not lie
on the foundation.
6.4

Electrical connection

Danger!
Contact with live components is pro-
hibited.
Produce the earth connection accord-
ing to the designation in the general
assembly drawing. See chapter "Des-
ignation of the earth connection".
Before starting work, make sure that all parts to be
connected are de-energised, e.g. by removing the
main fuse in all phases or installing a jumper wire.
The insulation resistance of the electrical tools and
fixtures and wiring is to be checked. The connection
may only be undertaken if this value lies in the allow-
able range.
All electrical connections must be established and all
electrical consumers/sensors must be connected
according to the circuit diagram.
GEA Refrigeration Germany GmbH | P_261511_1 | Generated 01.04.2015
Operating Manual | GEA Grasso M-Series
Screw Compressor Packages