Frigidaire FHWW144TF1 Use & Care Manual page 8

8
IMPORTANT SAFETY INSTRUCTIONS
searching for or detection of refrigerant
leaks. A halide torch (or any other
detector using a naked flame) shall not be
used.
The following leak detection methods are
deemed acceptable
containing flammable
Electronic leak detectors shall be used to
detect flammable refrigerants, but the
sensitivity may not be adequate, or may
need re-calibration.
equipment shall
refrigerant-free area). Ensure that the
detector is not a potential source of
ignition and is suitable for the refrigerant
used. Leak detection equipment shall be
set at a percentage of the LFL of the
refrigerant and shall be calibrated to the
refrigerant employed and the appropriate
percentage of gas (25 % maximum) is
confirmed. Leak detection fluids are
suitable for use with most refrigerants but
the use of detergents containing chlorine
shall be avoided as the chlorine may react
with the refrigerant and corrode the
copper pipe-work. If a leak is suspected,
all naked
removed/extinguished. If a leakage of
refrigerant is
brazing, all of the refrigerant shall be
recovered from the system, or isolated
(by means of shut off valves) in a part of
the system remote
Removal of refrigerant shall be according
to Removal and evacuation.
11. Removal and evacuation
When breaking into the refrigerant circuit
to make repairs – or for any other
purpose–conventional procedures shall
be used. However,
refrigerants it is important that best
practice be followed, since flammability is
a consideration. The following procedure
shall be adhered to:
a) Safely remove refrigerant following
local and national regulations;
b) Evacuate;
c) Purge the
(optional for A2L);
d) Evacuate (optional for A2L);
for systems
refrigerants.
(Detection
be calibrated
flames shall
found which requires
from the
for flammable
circuit with inert
e) continuously flush or purge with inert
gas when using flame to open circuit;
and;
f) open the circuit.
The refrigerant charge shall be recovered
into the correct recovery cylinders if
venting is not allowed by local and
national codes. For appliances containing
flammable refrigerants, the system shall
be purged with oxygen-free nitrogen to
render the appliance safe for flammable
in a
refrigerants. This process might need to
be repeated several times. Compressed
air or oxygen shall not be used for
purging
appliances
refrigerants, refrigerants purging shall be
achieved by breaking the vacuum in the
system with oxygen-free nitrogen and
continuing
pressure is achieved, then venting to
atmosphere, and finally pulling down to a
vacuum (optional for A2L). This process
shall be repeated until no refrigerant is
within the system (optional for A2L).
When the final oxygen-free nitrogen
be
charge is used, the system shall be vented
down to atmospheric pressure to enable
work to take place. Ensure that the outlet
for the vacuum pump is not close to any
potential
ventilation is available.
leak.
12. Charging procedures
In addition to conventional charging
procedures, the following requirements
shall
contamination of different refrigerants
does not occur when using charging
equipment. Hoses or lines shall be as
short as possible to minimise the amount
of refrigerant
Cylinders shall be kept in an appropriate
position according to the instructions.
Ensure that the refrigeration system is
earthed prior to charging the system with
refrigerant.
charging is complete (if not already).
Extreme care shall be taken not to overfill
gas
the refrigeration
recharging the system it shall be pressure
refrigerant systems.
containing
to fill until
ignition sources
be followed.
contained
Label the
system.
For
flammable
the working
and that
Ensure that
in them.
system when
Prior to