Daikin INVERTER FTXM-V Series Engineering Data page 123

FTXM-V Series
NOTICE
• After all the piping has been connected, make sure
there are no gas leaks. Use nitrogen to perform gas
leak detection.
• Under no circumstances should potential sources of
ignition be used in the searching for or detection of
refrigerant leaks. A halide torch (or any other detector
using a naked flame) should not be used.
• If a leak is suspected, all naked flames should be
removed/extinguished.
• The field-made refrigerant joints indoors should be
tightness tested according to the following
requirements: The test method should have a
sensitivity of 5 grams per year of refrigerant or better
under a pressure of at least 0.25 times the maximum
allowable pressure. No leak should be detected.
NOTICE
• To avoid compressor breakdown, do NOT charge
more than the specified amount of refrigerant.
• Extreme care should be taken not to overfill the
REFRIGERATING SYSTEM.
• Prior to recharging the system, it should be pressure-
tested with the appropriate purging gas.
• The system should be leak-tested on completion of
charging but prior to commissioning.
• A follow-up leak test should be carried out prior to
leaving the site.
• When the refrigerant system is to be opened,
refrigerant MUST be treated according to the
applicable legislation.
WARNING
Make sure there is no oxygen in the system. Refrigerant
may only be charged after performing a leak test and
vacuum drying.
Possible consequence: Self-combustion and
explosion of the compressor because of oxygen going
into the operating compressor.
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• In case recharge is required, see the nameplate of the unit. It
states the type of refrigerant and necessary amount.
• The unit is factory charged with refrigerant, but depending on
pipe sizes and pipe lengths some systems require additional
charging of refrigerant.
• Only use tools exclusively for the refrigerant type used in the
system. This to ensure pressure resistance and prevent
foreign materials from entering into the system.
• Charge the liquid refrigerant as follows:
If
A siphon tube is present
(i.e., the cylinder is marked
with "Liquid filling siphon
attached")
A siphon tube is NOT present
• Open refrigerant cylinders slowly.
• Charge the refrigerant in liquid form. Adding it in gas form may
prevent normal operation.
CAUTION
When the refrigerant charging procedure is done or
when pausing, close the valve of the refrigerant tank
immediately. If the valve is NOT closed immediately,
remaining pressure might charge additional refrigerant.
Possible consequence: Incorrect refrigerant amount.
121
EDUS042101
Then
Charge with the cylinder
upright.
Charge with the cylinder
upside down.
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3P627027-1
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