Repair Safety Considerations - Carrier Aquasnap 30RQS Series Installation, Operation And Maintenance Instructions

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
No check
detection
S ys t e m W I T H l e a ka g e
No check
detection
Refrigerant charge/circuit < 5 tons
(CO equivalent)
2
Refrigerant R134a Charge
< 3.5 kg
charge (kg) (GWP 1430)
R407C Charge
< 2.8 kg
(GWP 1774)
R410A Charge
(GWP 2088) < 2.4 kg
HFO's : R1434ze 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.
Protection device checks:
• If no national regulations exist, check the protection devices
on site in accordance with standard EN378: 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
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.
Consult Carrier Service for this type of test. Carrier mentions
here only the principle of a test without removing the pressure
switch:
- Verify and 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)
12 months 6 months 3 months
24 months 12 months 6 months
5 ≤ charge 50 ≤ charge
charge>
< 50 tons < 500 tons 500 tons*
3.5 ≤ charge 34.9 ≤ charge
charge
< 34.9 kg < 349.7 kg > 349.7 kg
2.8 ≤ charge 28.2 ≤ charge
charge
< 28.2 kg < 281.9 kg > 281.9 kg
2.4 ≤ charge 23.9 ≤ charge
charge
< 23.9 kg < 239.5 kg > 239.5 kg
- Connect a calibrated pressure gauge (the values
displayed on the user interface may be inaccurate in
an instant reading because of the scanning delay applied
in the control)
- Activate the HP quick test included in the control
procedure.
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, visually inspect the protection devices
(valves, pressure switches).
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, transfer the refrigerant to
bottles specifically provided for this purpose and consult the
pressure gauges.
Change the refrigerant after an equipment failure, 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.

1.6 - Repair safety considerations

All installation parts must be maintained by the personnel in
charge to avoid deterioration and injury. Faults and leaks must
be repaired immediately. The authorized technician must have
the responsibility to repair the fault immediately. After each unit
repair check the operation of the protection devices and create
a 100% parameter operation report.
Comply with the regulations and recommendations in unit and
HVAC installation safety standards, such as: EN 378, ISO 5149,
etc.
RISK OF EXPLOSION
Never use air or a gas containing oxygen during leak tests to
purge lines or to pressurise a machine. Pressurised air mixtures
or gases containing oxygen can be the cause of an explosion.
Oxygen reacts violently with oil and grease.
Only use dry nitrogen for leak tests, possibly with an appropriate
tracer gas.
If the recommendations above are not observed, this can have
serious or even fatal consequences and damage the installation.
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