Friedrich ZoneAire Select PZH12K3SC handleiding

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Handleiding

Warning:

No ignition sources: No person carrying out work in relation to a REFRIGERATING SYSTEM which involves exposing any pipe work 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 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.

Ventilated Area: Ensure that the area is in the open or that it is adequately ventilated before accessing the refrigerant in 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.

During Repairs To Sealed Components: All power must be removed from the equipment being worked on prior to any removal of sealed covers, etc.

If it is absolutely necessary to have an electrical supply to equipment during servicing, then a permanently operating form of leak detection shall be

located at the most critical point to warn of a potentially hazardous situation.

Checks And Repairs To Electrical Devices:

• Repair and maintenance of 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 no live electrical components and wiring are exposed while charging, recovering or purging the system;

•That there is continuity of earth bonding.

• Particular attention shall be paid to the following to ensure that by working on electrical components, the casing is not altered in such a way

that the level of protection is affected. This shall include damage to cables, excessive number of connections, terminals not made to original

speciﬁcation, damage to seals, incorrect ﬁtting of glands, etc.

• Ensure that the apparatus is mounted securely.

• Ensure that seals or sealing materials have not degraded to the point that they no longer serve the purpose of preventing the ingress of

ﬂammable atmospheres. Replacement parts shall be in accordance with the manufacturer’s speciﬁcations.

The following is a list of important considerations when working with R-32 equipment:

• R-32 pressure is approximately 60% higher than R-22 pressure.

• R-32 cylinders must not be allowed to exceed 125 F, they may leak or rupture.

• R-32 must never be pressurized with a mixture of compressed air, it may become MORE ﬂammable.

• Servicing equipment and components must be speciﬁcally designed for use with R-32 and dedicated to prevent contamination.

• Manifold sets must be equipped with gauges capable of reading 750 psig (high side) and 200 psig (low side), with a 500-psig low-side retard.

• Gauge hoses must have a minimum 750-psig service pressure rating.

• Recovery cylinders must have a minimum service pressure rating of 400 psig, (DOT 4BA400 and DOT BW400 approved cylinders).

• POE (Polyol-Ester) lubricants must be used with R-32 equipment.

• To prevent moisture absorption and lubricant contamination, do not leave the refrigeration system open to the atmosphere for extended periods of

time.

• If the system is void of refrigerant, weigh-in the refrigerant charge into the high side of the system.

• If there is any amount of refrigerant in the system charge from the low side.

• For low side pressure charging of R-32, use a charging adaptor.

R-32 SEALED SYSTEM REPAIR

General Information

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