Install Instructions

Page 8mrcool.com

Safety Precautions

WARNING (for using R290/R32 refrigerant only, continued)

The amount of charge is in accordance with the size of the room which the

refrigerant containing parts are installed.

The ventilation machinery and outlets are operating suﬃciently and are not

obstructed.

If an indirect refrigerant circuit is being used, the secondary circuit needs to

be checked for the presence of refrigerant.

Markings and signs on the unit are still visible and legible. If they are not,

make them visible and legible for future reference.

Refrigeration piping or components are installed in a location where they are

unlikely to be exposed to any corrosive substances that could corrode and

damage any of the refrigerant containing components. Unless, the components

are constructed of anti-corrosive materials, or are suitably protected from corrosion.

6.9) Check the Electrical Components: Repair and maintenance to electrical components should

include initial safety checks and component inspection procedures. If a fault exists, that could

compromise safety, then the electrical supply should not be connected to the circuit until the issue

has been resolved. If the fault cannot be immediately corrected, but it is necessary to continue

operation, an adequate, temporary solution should be used. This should be reported to the owner

of the equipment so all parties are aware and advised of the issue. Initial safety checks should

include the following:

All capacitors are discharged: this should be performed in a manner that is safe in

order to avoid the possibility of sparking.

No live electrical components and wiring are exposed during charging, recovering, or

purging the system.

Ensure the system is securely and properly grounded.

7. Repairs to Sealed Components

7.1) During repairs to sealed components, all electrical supplies should be disconnected from the

equipment being worked on before removing any sealed covers, etc. If it is necessary to have an

electrical supply connected to the equipment during service, then a permanent,

continually-operating form of leak detection should be located at the most critical point to warn of

any potentially hazardous situations.

7.2) Close attention should be paid to the following when working on electrical components:

Ensure the casing is not altered in such a way that the level of protection is aﬀected. This

includes damage to the cables, excessive number of connections, terminals that do not

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

Ensure the device is mounted securely.

Ensure the seals, or sealing materials, have not degraded to the point they no longer have

the ability to seal. Replacement parts should be in accordance with the manufacturer’s

speciﬁcations.

NOTE: The use of silicone sealent may inhibit the eﬀectiveness of some types of leak detection

equipment. Intrinsically safe components do not have to be isolated prior to working on them.

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