POWERCIAT LX ST/HE/XE
EN-
6
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*
Refrigerant charge/
Circuit (kg)
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 leak detection system.
8. A logbook must be maintained for equipment
subject to periodic leak tests. It should contain
the quantity and the type of fluid present in the
installation (added and recovered), the quantity
of recycled fluid, the date and result of the leak
test, the name of the operator and the name of
his/her 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 CIAT Service for this type of test. In this document, CIAT
only outlines the principle for a test without removal of the
pressure switches:
-
Check and record the nominal values for triggering the
pressure switches and external relief devices (valves,
if present).
-
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, 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 is opened for a day or less, block all
openings; fill the circuit with a nitrogen charge if open for
longer periods.
1.4 - Repair safety considerations
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.
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.
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.
Never exceed the specified maximum operating pressures.
Verify the allowable maximum high- and low-side test
pressures by checking the instructions in this manual and
the pressures given on the unit name plate.
1 - INTRODUCTION
