Carrier 50VZ Installation, Operation And Maintenance Instructions

Also see for 38PZ: Installation manual Installation manual

Carrier 50VZ Installation, Operation And Maintenance Instructions Manual pdf 35 page image

351 Fixed flange2 Setscrews3 Movable flange4 Straight-edge must be parallel with belt5 Motor and fan shafts must be parallel6 Pulleys7 Motor and fan shafts must be parallelFig. 29 - To align fan and motor pulleysLubricationBoth the motors and the fans have factory lubricated and sealedbearings, and need no further lubrication.The compressor has its own oil supply and oil should not beadded unless a leak has occurred.Servicing recommendations- Before replacing any of the elements in the coolingcircuit, ensure that the entire refrigerant charge is removedfrom both the high and low pressure sides of the unit.- The control elements of the cooling system are highlysensitive. If they need to be replaced, care should be takennot to overheat them with blowlamps whilst soldering. Adamp cloth should be wrapped around the component tobe soldered, and the flame directed away from thecomponent body.- Silver alloy soldering rods should always be used.- If the total unit gas charge has to be replaced, the quantityshould be as given on the nameplate and the unit shouldbe properly evacuated beforehand.- During unit operation all panels should be in place,including the electrical box access panel.- If it is necessary to cut the lines of the refrigerant circuit,tube cutters should always be used and never tools whichproduce burrs. All refrigerant circuit tubing should be ofcopper, specially made for refrigeration purposes.Transformation to split system (50VZ/PZ units)All units can be changed from a packaged to a split system, asdescribed below:- Disconnect the unit from the power supply.- Remove the compressor access panel(s) and the indoorunit access panel(s).- Recover the complete refrigerant charge from the high andlow pressure sides of each refrigerant circuit, and thencreate a light vacuum to prevent possible accidents.- From the indoor unit at the conduit drill hole remove theneoprene insulation from the suction line(s) until you findthe welded joint of both line sections (approximately 70 mmfrom the base of the indoor unit). Similarly locate thewelded joint of the liquid line sections. Separate bothlines (suction and liquid lines) by unsoldering them. Aftercompleting this operation, plug the ends of both lines toavoid the possible entry of foreign matter.- Loosen the indoor fan motor supply cable sleeve. Removethe sleeve.- Remove the air filters.- Loosen the screws and nuts that join the two sections(indoor and outdoor) inside the unit and separate themcarefully, to avoid damaging the refrigerant line ends.- Connect the refrigerant lines as described earlier in thetext.- Make the electrical connections.FINAL RECOMMENDATIONSThe unit you have purchased has undergone strict qualitycontrol procedures before leaving the factory.All components, including the control systems and electricalequipment, etc., are certified by our Quality ControlDepartment, and tested under the harshest possible operatingconditions in our laboratories. However, after leaving thefactory, it is possible that one or more of these elements may bedamaged due to causes beyond our control. In such an event,the user should not work on any of the internal components,or subject the unit to operating conditions which are notspecified in this manual, since serious damage may result andthe guarantee would be invalidated. Repair and maintenancework should always be left to the installer.All recommendations concerning unit installation are intendedto be as a guideline. The installer should carry out theinstallation according to the design conditions and shouldcomply with all applicable regulations for air conditioning andrefrigeration installations.NOTE: The manufacturer does not accept responsibility forany malfunctions resulting from misuse of the equipment.

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