Repair Safety Considerations - Carrier AquaForce PUREtec 30XW-VZE 451 Installation, Operation And Maintenance Instructions

1 - INTRODUCTION
OPERATING CHECKS:
IMPORTANT INFORMATION REGARDING THE REFRIGERANT
USED:
This product contains fluorinated greenhouse gas covered
by the Kyoto protocol.
Standard unit:
- Fluid type: R1234ze(E)
- Global Warming Potential (GWP): 7 (source IPCC
Assessment Report 4)
Unit with option 330:
- Fluid type: R515B
- Global Warming Potential (GWP): 293 (source IPCC
Assessment Report 4)
These refrigerant are classified group 2 "non-dangerous"
according to the critera of Pressure Equipment Directive
(PED) both 97/23/CE and 2014/68/CE.
CAUTION:
- Any handling of refrigerant contained in this product
must comply with the F-Gas Directive N° 517/2014 and
any other applicable local legislation.
- Ensure that the refrigerant is never released to the
atmosphere during installation, maintenance or
equipment disposal.
- The deliberate gas release into the atmosphere is strictly
not allowed.
- If a refrigerant leak is detected, ensure that it is stopped
and repaired as quickly as possible.
- 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.
- The gas recovery for recycling, regeneration or
destruction is at customer charge.
- The customer has to carry out periodic leak tests
In the European Union, article 2 of regulation (EU) No. 517/2014
makes these mandatory and sets their frequency. The table below
shows this frequency, as originally published in the regulation.
Check whether an inspection frequency is also set by other
regulations or standards applicable to your system (e.g. EN 378,
ISO5149, etc.).
System WITHOUT
No check
leakage detection
System WITH leakage
No check
detection
Refrigerant charge/
< 5 tons
circuit (CO equivalent)
2
Charge <
R32 (GWP 675)
7,4 kg
R134a (GWP Charge <
1430) 3,5 kg
R407C (GWP Charge <
2,8 kg
1774)
R410A (GWP Charge <
2,4 kg
2088)
Charge <
R515B (GWP 293)
17,1 kg
HFO's :
R1234ze(E)
(*) From 01/01/2017, customer installations must be equipped with a leakage
detection system
12
6 months 3 months
months
24
12 months 6 months
months
5 ≤ 50 ≤
Charge >
charge < charge <
500 tons
50 tons 500 tons
7,4 ≤ 74,1 ≤
Charge >
charge < charge <
740,7 kg
74,1 kg 740,7 kg
3,5 ≤ 34,9 ≤
Charge >
charge < charge <
349,7 kg
34,9 kg 349,7 kg
2,8 ≤ 28,2 ≤
Charge >
charge < charge <
281,9 kg
28,2 kg 281,9 kg
2,4 ≤ 23,9 ≤
Charge >
charge < charge <
239,5 kg
23,9 kg 239,5 kg
17,1 ≤ 170,6 ≤
Charge >
charge < charge <
1706,5 kg
170,6 kg 1706,5 kg
No requirement
- A logbook must be established for the systems that
require a tightness check. It should contain the quantity
and the type of fluid present within the installation (added
and recovered), the quantity of recycled fluid/regenerated/
destroyed, the date and output of the leak test, the
designation of the operator and its belonging company,
etc.
- Contact your local dealer or installer if you have any
questions.
PROTECTION DEVICE CHECKS:
- Periodic inspections of the safety devices and external
overpressure devices (external relief valves) must be
carried out in accordance with national regulations.
The company or organisation that conducts a pressure switch test
shall establish and implement a detailed procedure to fix:
- Safety measures
- Measuring equipment calibration
- Validating operation of protective devices
- Test protocols
- Recommissioning of the equipment.
An example of test procedure without removing the pressure
switch is given in Section 11.9 of this manual. Consult Carrier
Service for this type of test.
CAUTION: If the test leads to replacing the pressure switch,
it is necessary to recover the refrigerant charge, these
pressure switches are not installed on automatic valves
(Schraeder type).
At least once a year thoroughly inspect the protection devices
(valves). If the machine operates in a corrosive environment, inspect
the protection devices more frequently.
Regularly carry out leak tests and immediately repair any leaks
(follow local codes)
Ensure regularly that the vibration levels remain acceptable and
close to those at the initial unit start-up.
Change the refrigerant when there are equipment failures, following a
procedure such as the one described in NF E29-795 or carry out a
refrigerant analysis in a specialist laboratory.
If the refrigerant circuit remains open for longer than a day after
an intervention (such as a component replacement), the openings
must be plugged and the circuit must be charged with nitrogen
(inertia principle). The objective is to prevent penetration of
atmospheric humidity and the resulting corrosion on the internal
walls and on non-protected steel surfaces.

1.4 - Repair safety considerations

*
Equip the engineers that work on the unit with the protections
described in section 1.3 above.
It is compulsory to wear personal protection equipment and a
detector of explosive atmospheres.
The insulation must be removed and warming up must be limited
by using a wet cloth.
Before opening the unit, always ensure that the circuit has been
purged.
If work on the evaporator is required, ensure that the piping from
the compressor is no longer pressurised (as the valve is not
leaktight in the compressor direction.)
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