Carrier 39L handleiding
Handleiding
Je bekijkt pagina 4 van 76
4
Servicing
Prior to, and during the work being performed on an appliance
containing A2L refrigerants, the area must be checked with an ap
-
propriate refrigerant detector to ensure that the person or persons
performing work are aware of a potentially toxic or flammable at
-
mosphere. The area must also be surveyed to ensure there are no
flammable hazards or ignition risks. “No Smoking” signs shall be
displayed.
Should any hot work need to be performed on the refrigerant sys-
tem, or associated parts, appropriate fire extinguishing equipment
shall be available nearby. Have a dry powder or CO
2
fire extin-
guisher adjacent to the charging area.
All maintenance staff and others working in the local area shall
also be instructed on the nature of work being carried out. Work in
confined spaces shall be avoided wherever possible.
Evacuation, Removal, and Repair
When breaking into the refrigerant circuit to make repairs – or for
any other purpose – conventional procedures shall be used. How-
ever, for flammable refrigerants it is important that best practice be
followed, since flammability is a consideration.
The following procedure shall be adhered to:
1. Safely remove refrigerant following local and national
regulations.
2. Evacuate.
3. Purge the circuit with inert gas (optional for A2L refrigerants).
4. Evacuate (optional for A2L refrigerants).
5. Continuously flush or purge with inert gas when using flame
to open circuit.
6. Open the circuit.
For appliances containing flammable refrigerants, purging shall be
achieved by breaking the vacuum in the system with oxygen-free
nitrogen and continuing to fill until the working pressure is
achieved, then venting to atmosphere, and finally pulling down to
a vacuum. This process may need to be repeated several times un
-
til the system is free from refrigerant. When the final oxygen-free
nitrogen charge is used, the system shall be vented down to atmo
-
spheric pressure to enable work to take place.
The refrigerant charge shall be recovered into the correct recovery
cylinders if venting is not allowed by local and national codes. En
-
sure that the correct number of cylinders for holding the total sys-
tem charge is available. All cylinders to be used are designated for
the recovered refrigerant and labeled for that refrigerant. Cylinders
shall be complete with pressure-relief valve and associated shut-
off valves in good working order. Empty recovery cylinders are
evacuated and, if possible cooled before recovery occurs.
The recovery equipment shall be in good working order with a set
of instructions concerning the equipment that is at hand and shall
be suitable for the recovery of the flammable refrigerant. If in
doubt, the manufacturer should be consulted. In addition, a set of
calibrated weighing scales shall be available and in good working
order. Hoses shall be complete with leak-free disconnect coupling
and in good condition.
The recovered refrigerant shall be processed according to local
legislation in the correct recovery cylinder, and the relevant waste
transfer not arranged. Do not mix refrigerants in recovery units,
and especially not in cylinders.
If compressors or compressor oils are to be removed, ensure that
they have been evacuated to an acceptable level to make certain
that flammable refrigerant does not remain within the lubricant.
The compressor body shall not be heated by an open flame or oth
-
er ignition sources to accelerate this process. When oil is drained
from a system, it shall be carried out safely.
At no point during this process should the outlet for the vacuum
pump be close to any potential ignition sources, and ventilation
shall be available.
Charging
In addition to conventional charging procedures, the following re-
quirements shall be followed.
1. Ensure that contamination of different refrigerants does not
occur when using charging equipment. Hoses or lines shall be
as short as possible to minimize the amount of refrigerant
contained in them.
2. Cylinders shall be kept in an appropriate position according
to the instructions.
3. Ensure that the refrigerating system is earthed prior to
charging the system with refrigerant.
4. Label the system when charging is complete (if not already).
5. Extreme care shall be taken not to overfill the refrigerating
system.
6. Prior to recharging the system, it shall be pressure-tested with
the appropriate purging gas. The system shall be leak tested
on completion of charging but prior to commissioning. A fol
-
low up leak test shall be carried out prior to leaving the site.
A2L REFRIGERANT INFORMATION
This equipment may contain R-454B or R-32, mildly flamma-
ble refrigerants classified as A2L. Know the refrigerant type
used with this unit and ensure all instructions are read prior to
storing, installing, or servicing this equipment. For units con
-
taining R-410A or R-22, information and instructions regard-
ing A2L refrigerants within this document may be disregarded.
Detection of Flammable Refrigerants
Never use potential sources of ignition for the search or detection
of refrigerant leaks. This is universal for both A2L and non-A2L
refrigerants. A halide torch or other detectors using open flames
shall not be used, under any circumstance.
The following leak detection methods are deemed acceptable for
all refrigerant systems.
Electronic leak detectors may be used to detect refrigerant leaks,
but in the case of flammable refrigerants the sensitivity may not be
adequate or require recalibration. Detection equipment shall be
calibrated in a refrigerant-free area. Ensure that the detector is not
a potential source of ignition and is suitable for the refrigerant
used. Leak detection equipment shall be set at a percentage of the
LFL of the refrigerant and shall be calibrated to the refrigerant em
-
ployed, and the appropriate percentage of gas (25% max.) is con-
firmed. Leak detection fluids are also suitable for use with most
refrigerants but the use of detergents containing chlorine shall be
avoided as the chlorine may react with the refrigerant and corrode
the copper pipework. Examples of leak detection fluids:
• Bubble method.
• Fluorescent method agents.
IMPORTANT: The installation of air-handling units and all
associated components, parts, and accessories which make
up the installation and subsequent maintenance shall be in
accordance with the regulations of ALL authorities having
jurisdiction and MUST conform to all applicable codes. It
is the responsibility of the installing contractor to determine
and comply with ALL applicable codes and regulations.
Field-supplied motors should be Underwriters Laboratories
(UL) or Canadian Standards Association (CSA) approved.
Field wiring must comply with National Electrical Code
(NEC) and all local requirements.
Bekijk gratis de handleiding van Carrier 39L, stel vragen en lees de antwoorden op veelvoorkomende problemen, of gebruik onze assistent om sneller informatie in de handleiding te vinden of uitleg te krijgen over specifieke functies.
Productinformatie
| Merk | Carrier |
| Model | 39L |
| Categorie | Niet gecategoriseerd |
| Taal | Nederlands |
| Grootte | 14640 MB |
