REMKO CMF-80 v.2 - Manual (Page 23)

■ The outdoor module and the
indoor module are connected
with two copper pipes of di-
mensions “ and “.
All work must be excluded
which could cause soiling or
the infiltration of chips into the
refrigerant pipes!
CAUTION
Outdoor unit
Oil pump bend
in suction pipe to
outdoor module1
every 2.5 metres of
rising pipe
Radius:
min 50 mm
up to 20 m
Indoor unit
The connection of refriger-
ant pipes and the handling of
refrigerant may only be carried
out by authorised specialist
personnel.
CAUTION
Connection of refrigerant lines
■ Only suitable tools may be
used.
■ Observe the permitted bending
radius for the refrigerant pipes
during installation in order to
prevent kinks. Never bend a
pipe twice in the same place in
order to prevent embrittlement
or crack formation.
■ Suitable fastening and insula-
tion is to be ensured when
laying the refrigerant pipes.
■ The outdoor sections of the
refrigerant pipes should be fi t-
ted with additional pipe insula-
tion by the customer in order to
minimise performance loss.
■ The copper pipes are to be
fl anged in order to make the
connections to the modules.In
doing so, check that the fl ange
has the correct shape and suit-
able union nuts.
■ If the outdoor unit is installed
at a higher level than the
indoor unit, suitable oil return
measures must be taken. This
is generally achieved by an oil
pump bend installed for every
2.5 metres of height difference.
Unit connector
■
The enclosure panel is to be
removed from the outdoor
module. It may be necessary to
remove the pre-cut bushings.
■ The connection of the refriger-
ant pipes to the device connec-
tions are to initially be made by
hand, in order to ensure a good
fi t.
■ Subsequently the threaded
assemblies are to be fastened
with two adjustable spanners.
One of the spanners is to be
used to counter the rotation.
■ The installed refrigerant pipes
including the connectors must
be provided with suitable ther-
mal insulation.
Tightness check
■ Connect the manometer station
to at least one Schrader valve
on the stop valves of the out-
door module.
■ The tightness test is to be un-
dertaken with dried nitrogen at
a test pressure of 40 bar.
■ The connections and connec-
tors of the pipelines must be
checked with a suitable leak
detector and any leaking areas
are to be rectifi ed.
Pumping down to vacuum
■ The positive pressure must be
removed from the refrigerant
pipes.
■ The vacuum pump should have
an absolute fi nal partial pres-
sure of 10 mbar in order to
remove all foreign gasses in the
pipelines.
Add refrigerant
■ The outdoor module contains a
suffi cient refrigerant fi lling for a
pipe length of up to 30 metres.
■ If the length of any of the pipe-
lines exceeds 30 metres, then
an additional fi lling of 60g per
additional metre of pipe length
(single length) is required.
Before start up
■ The stop valves are to be fully
opened in an anticlockwise di-
rection with a hexagon wrench.
23