REMKO CMF 320 Duo - Manual (Page 24)

REMKO CMF - DUO
Monitoring for leaks
■
Connect the manometer to at
least one Schrader valve on the
shut-off valves of the outdoor
module.
■
The leak test must to be
undertaken with dried nitrogen
at a test pressure of 40 bar for
a period of 30 minutes.
■
Pipeline joints and connectors
must be checked with a suitable
leak detector and any leaks
rectified.
Pumping down to vacuum
■
Excess pressure must be
removed from the refrigerant
pipes.
■
The vacuum pump should show
a final partial pressure of no
more than 10 mbar in order to
remove all foreign gasses and
moisture from the pipelines.
■
The time required to generate
the vacuum depends on
the length of the refrigerant
pipes. A test time of at least
60 Minutes
is recommended.
When the foreign gasses have
been completely removed from
the system, the valves on the
manometer station are closed.
Placing the refrigeration system in service
Add refrigerant
■
The outdoor module is pre-
filled with refrigerant sufficient
for a length of ordinary pipe
up to 30 metres.
■
If the length of any
pipe exceeds 30 metres,
a supplementary refrigerant
charge of 600g per 10 metres
of pipe (single length) is
required.
Connecting the cold circuit
■
After the previously described
work and tests, the shut-off
valve must be completely
opened counter-clockwise
with the appropriate hex key.
Doing so connects the outdoor
module cryogenically with the
outdoor module. Only at this
point is the heat-pump system
cryogenically functional.
■
Next, screw on the cover
caps and check the seals of
the entire shut-off valve for
tightness.
■
Now come the performance
tests and supplementary
isolation of all connections to
prevent condensation shorts.
A vacuum of
at least 20 mbar must be pro-
duced!
! CAUTION
Only refrigerant in a liquid
state may be used to fill the
cooling circuit.
! CAUTION
The connection of refriger-
ant pipes and the handling of
refrigerant may be carried out
only by authorised specialists
(competence category I).
! CAUTION
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