Daikin DDC Series Installation And Maintenance Manual

Contents

Daikin DDC Series Installation And Maintenance Manual Manual pdf 8 page image

6ROOF CURB POST-INSTALLATION CHECKSAfter installation, check the top of the curb, duct connection frameand duct flanges to make sure gasket has been applied properly.Gasket should be firmly applied to the top of the curb perimeter,duct flanges and any exposed duct connection frame. If gasket isloose, re-apply using strong weather resistant adhesive.P ROTRUSIONInspect curb to ensure that none of the utility services (electric)routed through the curb protrude above the curb.IF PROTRUSIONS EXIST , DO NO ATTEMPT TO SET UNIT ON CURB.CAUTIONROOF TOP DUCT CONNECTIONSInstall all duct connections on the unit before placing the unit onrooftop.RIGGING DETAILSWARNINGTO PREVENT PROPERTY DAMAGE, THE UNIT SHOULD REMAIN IN AN UPRIGHTPOSITION DURING ALL RIGGING AND MOVING OPERATIONS. TO FACILITATELIFTING AND MOVING WHEN A CRANE IS USED, PLACE THE UNIT IN ANADEQUATE CABLE SLING.DO NOT LIFT UNITS TWO AT A TIME . PROVISIONS FOR FORKS HAVEBEEN INCLUDED IN THE UNIT BASE FRAME. MINIMUM FORK LENGTH IS72” TO PREVENT DAMAGE TO THE UNIT.CAUTIONProvisions for forks have been included in the unit base frame. Noother fork locations are approved.WARNINGTO PREVENT POSSIBLE EQUIPMENT DAMAGE, PROPERTY DAMAGE, PERSONALINJURY OR DEATH, THE FOLLOWING BULLET POINTS MUST BE OBSERVEDWHEN INSTALLING THE UNIT.• Unit must be lifted by the four lifting holes located at thebase frame corners.• Lifting cables should be attached to the unit with shackles.• The distance between the crane hook and the top of theunit must not be less than 60”.• Two spreader bars must span over the unit to preventdamage to the cabinet by the lift cables. Spreader barsmust be of sufficient length so that cables do not come incontact with the unit during transport. Remove woodstruts mounted beneath unit base frame before settingunit on roof curb. These struts are intended to protectunit base frame from fork lift damage. Removal isaccomplished by extracting the sheet metal retainers andpulling the struts through the base of the unit. Refer torigging label on the unit.Important: If using bottom discharge with roof curb, ductworkshould be attached to the curb prior to installing the unit. Ductworkdimensions are shown in Roof Curb Installation Instructions.Refer to the Roof Curb Installation Instructions for proper curbinstallation. Curbing must be installed in compliance with the Na-tional Roofing Contractors Association Manual.Lower unit carefully onto roof mounting curb. While rigging unit,center of gravity will cause condenser end to be lower than supplyair end.WHEN UNIT IS SUSPENDED, BOARDS AND SHIPPING BRACE WILL DROP WHENSCREWS ARE REMOVED. TO PREVENT PERSONAL INJURY, STAND CLEAR.REMOVE FORK HOLE BRACKETS, BOARDS AND SHIPPING BRACE FROM BOTTOMOF UNIT BEFORE PLACING UNIT ONTO CURB.CAUTIONTo assist in determining rigging requirements, unit weights areshown as follows:COMPRESSOR 1COMPRESSOR 2CGEVAPORATOR COILSABCX DYCORNER & CENTER OF GRAVITY LOCATIONS