Good practice prescribes that all refrigerant
is collected safely. Before the work is carried
out, samples of oil and refrigerant must be
taken, if analyses are required before col-
lected refrigerant can be reused. There
must be a power supply when this task is
started.
1.
Familiarise yourself with the equipment
and its use.
2.
Isolate the system electrically.
3.
Before starting the procedure, ensure
that:
■
necessary equipment for mechanical
handling of the refrigerant container
is available
■
all necessary personal safety equip-
ment is available and used correctly
■
the collection process is continuously
supervised by an authorised person
■
the collection equipment and contain-
ers meet appropriate standards.
4.
Pump the refrigerant system to vacuum,
if possible.
5.
If it is not possible to pump to vacuum,
manufacture a branch, so that the refri-
gerant can be retrieved from different
parts of the system.
6.
Check that the refrigerant container is
on the scales before starting to collect.
7.
Start the collection device and collect
according to the manufacturer's instruc-
tions.
8.
Do not overfill the containers (max. 80
% (volume) liquid content).
9.
Do not exceed the containers' maximum
permitted working pressure – not even
temporarily.
10.
When the containers have been filled
correctly and the process is complete,
close all shut-off valves in the equip-
ment and remove and containers and
equipment from the installation imme-
diately.
11.
The collected refrigerant must not be
filled in any other system before being
cleaned and checked.
Marking
The equipment must be marked stating
that it has been taken out of operation and
drained of refrigerant. The marking must
be dated and signed. Check that the
equipment is marked indicating that it
contains combustible refrigerant.
Collection
Best practice prescribes that all refrigerant
is collected safely when the refrigerant is
drained from a system, either for servicing
or for decommissioning.
The refrigerant must only be collected in
suitable refrigerant containers. Ensure that
the required number of containers, that
can hold the entire volume of the system,
are available. All containers that are to be
used must be intended for the collection
of the refrigerant and marked for this refri-
gerant (especially designed for the collec-
tion of refrigerant). The containers must
have the correctly functioning relief valves
and shut-off valves. Empty collection con-
tainers must be drained and, if possible,
chilled before collection.
The collection equipment must function
correctly and instructions for the equip-
ment must be to hand. The equipment
must be suitable for the collection of com-
bustible refrigerant.
Fully functioning and calibrated scales must
also be to hand.
Hoses must be in good condition and be
equipped with leak proof quick-couplings.
Before using the collecting machine, check
that it works correctly and has been well
NIBE F470Chapter 1 | Important information8
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