5. Maintenance
1111
10)
Refrigerant charging
As a supplement to regular procedures
of
refrigerant
charging,
the
following
requirements
are
required
.
●
Ensure that there is no mutual contamination between different refrigerants during refrigerant charging.
The
pipeline to fill
system
with
refrigerant
should
be
as
short
as
possible
in
order
to
reduce
the
residual
amount
of
refrigerant
in
it;
●
The refrigerant tank should be kept vertically upwards;
●
Ensure that the refrigeration system has been well grounded
before
charging;
●
Label the system after charging
is
finished(or
not
yet
completed);
●
Overfillig is prohibited;
Before refilling the system
,
a pressure test should be performed with OFN
.
After charging
,
a leakage test is
required before test run of heat pump
.
And please have a leakage test again before leaving the service area
.
11) Precautions
of
refrigerant
charging
Please make sure charging of refrigerant is done with correct amount based on information on unit label
.
12) Emergency treatment
Emergency plan should be well prepared at service site and daily preventive measures should be
carried out
.
For example
,
fire is forbidden at site and it is prohibited to wear clothing or shoes
which can generate static or sparks
.
●
Suggesteddisposal in case of serious leakage
of flammable refrigerant:
a) Turn on the ventilation equipments and cut off power supply of other devices
.
Persons should
evacuate from sit
immediately
.
b) Notify
and
evacuate
the neighbouring people and residents
in
order
and
stay
away
from
the
site for at least 20
meters
.
Call the police and set up a warning region forbidding people and
vehicles from
approaching.
c) On-site treatment
should
be
carried
out
by
professional firefighters
with
anti-static
clothing.
Cut off the leakage source.
d) Purge and eliminate flamable refrigerant and residual gas
at leakage point and surrounding
area with nitrogen, especially for low-lying areas.
Detect
and
verify
the
elimination
work
with
professional
detector
until
concerntration
of
flamable
refrigerant
become
zero.
Only
after
that,
alarm
can
be
cleared.
9) Procedures
of
service
on
refrigeration
system
The refrigeration circuit should be operated according to the proper procedures.
And
the
flammability
of
refrigerant
should
also
be
considered. Please
follow
the
procedures
below.
●
Remove refrigerant;
●
Purify the pipeline with inert gas;
●
Vacuum
the
refrigerant
system;
●
Purify the pipeline with inert gas
again;
●
Cut pipeline
or
weld
it
as
required.
Содержание Thermal 12
Страница 119: ...5 Maintenance 5 1 119 Cable connected to fan motor capacitor 4 ...
Страница 127: ...6 Attached drawing Monoblock unit 1 127 Thermal 6 9 12 ...
Страница 131: ......
