7
CAUTION:
1. Any intervention on the refrigerant circuit of this product
should be performed in accordance with the applicable
legislation. In the EU, the regulation is called F-Gas,
N°517/2014
2. Ensure that the refrigerant is never released to the
atmosphere during installation, maintenance or equipment
disposal.
3. The deliberate gas release into the atmosphere is not
allowed.
4. If a refrigerant leak is detected, ensure that it is stopped
and repaired as quickly as possible.
5. Only a qualified and certified personnel can perform
installation operations, maintenance, refrigerant circuit
leak test as well as the equipment disposal and the
refrigerant recovering.
6. The gas recovery for recycling, regeneration or destruction
is at customer charge.
7. Periodic leak tests have to be carried out by the customer
or by third parties. The EU regulation set the periodicity
here after:
System WITHOUT
leakage detection
No
Check
12 Months
6 Months 3 Months
System WITH
leakage detection
No
Check
24 Months 12 Months 6 Months
Refrigerant charge/
circuit (CO
2
equivalent)
< 5 Tons
5 ≤ Charge
< 50 Tons
50 ≤ Charge
< 500 Tons
Charge >
500
Tons*
Re
friger
ant char
ge/ Cir
cuit
(k
g)
R134A
(GWP
1430)
Charge
< 3,5 kg
3,5 ≤
Charge <
34,9 kg
34,9 ≤
Charge <
349,7 kg
Charge >
349,7 kg
R407C
(GWP
1774)
Charge
< 2,8 kg
2,8 ≤
Charge
< 28,2 kg
28,2 ≤
Charge
< 281,9 kg
Charge >
281,9 kg
R410A
(GWP
2088)
Charge
< 2,4 kg
2.4 ≤
Charge
< 23,9 kg
23,9 ≤
Charge
< 239,5 kg
Charge >
239,5 kg
HFO’s:
R1234ze
No requirement
* From 01/01/2017, units must be equipped with a leakage detection system
8. A logbook must be established for equipments subject to
periodic leak tests. It should contain the quantity and the
type of fluid present within the installation (added and
recovered), the quantity of recycled fluid, regenerated or
destroyed, the date and output of the leak test, the
designation of the operator and its belonging company,
etc.
9. Contact your local dealer or installer if you have any
questions.
The information on operating inspections given in annex C
of standard EN 378 can be used if no similar criteria exist in
the national regulations.
While working in the fan area, especially when grilles or
casings are removed, disconnect the fan power supply to
prevent their automatic restart.
PROTECTION DEVICE CHECKS:
-
If no national regulations exist, check the protection
devices on site in accordance with standard EN 378:
Once a year for the high-pressure switches, every five
years for external relief valves.
The company or organisation that conducts a pressure switch test
must establish and implement detailed procedures for:
-Safety measures
-Measuring equipment calibration
-Validating operation of protective devices
-Test protocols
-Recommissioning of the equipment.
Consult Carrier Service for this type of test. Carrier mentions here
only the principle of a test without removing the pressure switch:
-Verify and record the set-points of pressure switches and
relief devices (valves and possible rupture discs)
-
Be ready to switch-off the main disconnect switch of the power
supply if the pressure switch does not trigger (avoid over-
pressure or excess gas in case of valves on the high-pressure
side with the recovery condensers)
-
Connect a pressure gauge protected against pulsations (filled
with oil with maximum pointer if mechanical), preferably
calibrated (the values displayed on the user interface may
be inaccurate in an instant reading because of the scanning
delay applied in the control)
-Complete an HP Test as provided by the software (refer to
the Control IOM for details).
If the machine operates in a corrosive environment, inspect
the protection devices more frequently.
Regularly carry out leak tests and immediately repair any
leaks. Ensure regularly that the vibration levels remain
acceptable and close to those at the initial unit start-up.
Before opening a refrigerant circuit, purge and consult the
pressure gauges.
Change the refrigerant after an equipment failure.
Plug all openings whenever the refrigerant circuit is opened
for up to one day. For longer openings place a nitrogen charge
in the circuit.
1.4 - Repair safety considerations
Equip the engineers that work on the unit with the protections
described in section 1.1 above.
All installation parts must be maintained by the personnel in charge,
in order to avoid material deterioration and injuries to people. Faults
and leaks must be repaired immediately. The authorized technician
must have the responsibility to repair the fault immediately. After
each repair of the unit, check the operation of the protection devices
and create a report of the parameter operation at 100%.
Comply with the regulations and recommendations in unit and
HVAC installation safety standards, such as: EN 378, ISO 5149,
etc.
If a leak occurs or if the refrigerant becomes contaminated (e.g.
by a short circuit in a motor) remove the complete charge using
a recovery unit and store the refrigerant in mobile containers.
Repair the leak detected and recharge the circuit with the total
R-134a charge, as indicated on the unit name plate. Certain parts
of the circuit can be isolated. Only charge liquid refrigerant R-134a
at the liquid line.
Ensure that you are using the correct refrigerant type before
recharging the unit. Charging any refrigerant other than the
original charge type (R-134a) will impair machine operation and
even destroy the compressors. The compressors operating with
this refrigerant type are lubricated with a synthetic polyolester
oil.
1 - INTRODUCTION
