Manual Carrier 51QPD (page 6 of 19) (English)

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Warnings(for using R290/R32 refrigerant only)

1.Transport of equipment containing flammable refrigerants

See transport regulations

2.Marking of equipment using signs

See local regulations

3.Disposal of equipment using flammable refrigerants

See national regulations.

4.Storage of equipment/appliances

The storage of equipment should be in accordance with the

manufacturer's instructions.

5.Storage of packed (unsold) equipment

Storage package protection should be constructed such

that mechanical damage to the equipment inside the

package will not cause a leak of the refrigerant charge.

The maximum number of pieces of equipment permitted to

be stored together will be determined by local regulations.

6.Information on servicing

1)Checks to the area

Prior to beginning work on systems containing flammable

refrigerants, safety checks are necessary to ensure that the

risk of ignition is minimised. For repair to the refrigerating

system, the following precautions shall be complied with

prior to conducting work on the system.

2)Work procedure

Work shall be undertaken under a controlled procedure so

as to minimise the risk of a flammable gas or vapour being

present while the work is being performed.

3)General work area

All maintenance staff and others working in the local area

shall be instructed on the nature of work being carried out.

Work in confined spaces shall be avoided. The area

around the workspace shall be sectioned off. Ensure that

the conditions within the area have been made safe by

control of flammable material.

4)Checking for presence of refrigerant

The area shall be checked with an appropriate refrigerant

detector prior to and during work, to ensure the technician

is aware of potentially flammable atmospheres. Ensure

that the leak detection equipment being used is suitable

for use with flammable refrigerants,

i.e. non-sparking, adequately sealed or intrinsically safe.

5)Presence of fire extinguisher

If any hot work is to be conducted on the refrigeration

equipment or any associated parts, appropriate fire

extinguishing equipment shall be available to hand. Have

a dry powder or CO2 fire extinguisher adjacent to the

charging area.

6)No ignition sources

No person carrying out work in relation to a refrigeration

system which involves exposing any pipe work that

contains or has contained

flammable refrigerant shall use any sources of ignition in

such a manner that it may lead to the risk of fire or

explosion. All possible ignition sources, including cigarette

smoking, should be kept sufficiently far away from the site

of installation, repairing, removing and disposal, during

which flammable refrigerant can possibly be released to the

surrounding space. Prior to work taking place, the area

around the equipment is to be surveyed to make sure that

there are no flammable hazards or ignition risks. No

Smoking signs shall be displayed.

7)Ventilated area

Ensure that the area is in the open or that it is adequately

ventilated before breaking into the system or conducting

any hot work. A degree of ventilation shall continue during

the period that the work is carried out. The ventilation

should safely disperse any released refrigerant and

preferably expel it externally into the atmosphere.

8)Checks to the refrigeration equipment

Where electrical components are being changed, they shall

be fit for the purpose and to the correct specification. At all

times the manufacturer's maintenance and service

guidelines shall be followed. If in doubt consult the

manufacturer's technical department for assistance. The

following checks shall be applied to installations using

flammable refrigerants:

The charge size is in accordance with the room size within

which the refrigerant containing parts are installed;

The ventilation machinery and outlets are operating

adequately and are not obstructed;

If an indirect refrigerating circuit is being used, the

secondary circuit shall be checked for the presence of

refrigerant; Marking to the equipment continues to be

visible and legible. Markings and signs that are illegible

shall be corrected;

Refrigeration pipe or components are installed in a

position where they are unlikely to be exposed to any

substance which may corrode refrigerant containing

components, unless the components are constructed of

materials which are inherently resistant to being corroded

or are suitably protected against being so corroded.

9)Checks to electrical devices

Repair and maintenance to electrical components shall

include initial safety checks and component inspection

procedures. If a fault exists that could compromise safety,

then no electrical supply shall be connected to the circuit

until it is satisfactorily dealt with. If the fault cannot be

corrected immediately but it is necessary to continue

operation, an adequate temporary solution shall be used.

This shall be reported to the owner of the equipment so

all parties are advised.

Initial safety checks shall include:

That capacitors are discharged: this shall be done in a

safe manner to avoid possibility of sparking;

That there no live electrical components and wiring are

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Carrier 51QPD Manual

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