Mitsubishi Electric PUZ-WZ50VAA Service Manual page 6

(16) Do not install the unit in places where refrigerant may build-up or places with poor ventilation such as a semi-base-
ment: Refrigerant is heavier than air, and inclined to fall away from the leak source.
(17) The appliance shall be stored in a room without continuously operating ignition sources (for example: open
flames, an operating gas appliance or an operating electric heater).
(18) Do not pierce or burn.
(19) Do not use means to accelerate the defrosting process or to clean, other than those recommended by the manu-
facturer.
(20) Be aware that refrigerants may not contain an odour.
(21) Pipe-work shall be protected from physical damage.
(22) Compliance with national gas regulations shall be observed.
(23) Keep any required ventilation openings clear of obstruction.
(24) Servicing shall be performed only as recommended by the manufacturer.
(25) The appliance shall be stored in a well-ventilated area where the room size corresponds to the room area as
specified for operation.
(26) Maintenance, service and repair operations shall be performed by authorised technician with required qualification.
(27) Work on the refrigerant circuit with flammable refrigerant in safety group A3 may only be carried out by author-
ised heating contractors. These heating contractors must be trained in accordance with EN 378 Part 4 or IEC
60335-2-40 Annex HH.
(28) Be sure to have appropriate ventilation in order to prevent ignition. Furthermore, be sure to carry out fire preven-
tion measures that there are no dangerous or flammable objects in the surrounding area.
(29) When carrying out work on the refrigerant circuit or working in the protected area, a competent electrician with
the requisite professional qualifications must use only the specified and appropriate tools.
Use appropriate tools and equipment approved for R290 refrigerant.
(30) Perform service after recovering the refrigerant left in unit completely.
Refrigerant must only be released, recovered and disposed properly by an authorised competent person.
(31) In order to not invalidate unit warranty and maintain the correct and safe functioning of the unit, please use only
parts and accessories recommended by Mitsubishi Electric, to be installed by a competent electrician with the
requisite professional qualifications in your jurisdiction. We accept no liability for damage or expenses caused
by the incorrect installation of the unit and/or third party accessories, parts or components, which may result in
water leakage, electric shock or fire.
(32) Make sure that unauthorised persons are restricted from entering the work area or protective zone of the unit
during working. Restrict the work area and put up the warning signs.
OCH816
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