Application guidelines
45
FRCC.PC.021.A5.22
Installation
Compressor holding charge
Each compressor is shipped with a nominal
dry nitrogen holding charge between 4.35 and
10.15 psig and is sealed with elastomer plugs.
Before the suction and discharge plugs are
removed, the nitrogen holding charge must be
released via the suction schrader valve to avoid
an oil mist blowout. Remove the suction plug
first and the discharge plug afterwards. The plugs
shall be removed only just before connecting the
compressor to the installation in order to avoid
moisture from entering the compressor. When
the plugs are removed, it is essential to keep the
compressor in a upright position so as to avoid oil
spillage.
Trio kit code numbers
CP 2
CP 3
CP 1
Right suction
CP 2
CP 3
CP 1
Left suction
Trio model
Cp 1
Cp 2
Cp 3
Suction side
Suction washer (restrictor) kit
Outline
drawing
Code nb for ordering
Reference
Diameter (in)
Washer in suction of
PSH153
PSH051 PSH051 PSH051
Left
7777040
5311579P02
1.30
Cp3
8556146
Right
7777039
5311579P03
1.36
Cp1 & cp3
PSH192
PSH064 PSH064 PSH064
Left
7777040
5311579P02
1.30
Cp3
8556147
Right
7777039
5311579P03
1.36
Cp1 & cp3
PSH231
PSH077 PSH077 PSH077
Left
7777040
5311579P02
1.30
Cp3
8556147
Right
Not needed
For each tandem and trio configuration specific
outline drawings are available as indicated on the
previous pages. These drawings must always be
respected.
No changes shall be made to the indicated
tubing diameter and fitting types.
Minimum straight length indicated on drawings
must be respected.
The oil equalisation line shall be made of copper
tube and assembled in such a way that it does
not extend above the connection height and
must be horizontal so as not to trap oil.
Oil equalisation fitting must not be heated during
installation and servicing. This could damage
to the compressor and impact oil equalisation
balancing.
Tandem and trio piping
design
Danfoss Commercial Compressors recommends
using the lift and handling devices, as shown in
picture beside, and that the following procedure
be used to prevent damage.
Two lift rings are provided on each compressor.
Use all four rings.
Maximum loads authorized per sling and for the
hoist hook must not be lower than the weight
of the assembly.
The minimum spreader bar length must be at
least equal to the centre distance between the
two compressors to prevent bending the frame.
When lifting, use a spreader block between the
compressors to prevent any unit frame damage.
When the tandem unit is already mounted
into an installation, never lift the complete
installation by using the lift rings on the
compressors.
Tandem and trio Handling
Spreader block
Spreader bar
Slings
Frame
