|
Quotation Are Invited For Supply, Installation, Testing And Commissioning 2 Nos. Air Cooled Packag 1172600696 Sitc 2 Nos. Air Cooled Package Ac Units Including Associated Ducting, Electrical Works, And Removal Of Existing Units At Jebal Ali Chc. Contact: Mohideen/ 553810513 1 7000000011 Dewa-Confidentialsupply, Installation, Testing & Commissioning Of 2 Nos. Air Cooledpackage Ac Units Including Associated Ducting, El Ectrical Works, Andremoval Of Existing Units At Jebal Ali Chc.A.Technical Specificationcontractor Scope Of Work:Supply, Installation , Testing, And Commissioning Of New Package Airconditioning Units, Including All Associated Works Such As New Ductingbranches, Suppo Rts, Insulation, And Accessories, For Replacement Of Theexisting Old Package Unit And Its Connected Ducting System At Jebal Alichc, In Accordance With Project Specifications And Authorityrequirements.The Contractor#S Scope Shall Also Include The Complete Removal O F Theexisting Package Unit And All Associated Ducting Branches From Thebuilding Roof. This Includes Safe Isolation, Dismantling, Han Dling,Loading, Transportation, And Disposal Of All Removed Materials At Thedewa Ruwaiyah Scrap Yard, In Full Compliance With Applica Bleregulations, Safety Standards, And Authority Requirements.Si No.Brand Nameexisting Unit Model Numberexisting Unit Serial Number1y Orkdms240300a4a11200000609092yorkdms24030 0A4a11200000509091.Environment Friendly Refrigerant Shall Be Used Such As R 407C / R410a /R 134A Subject To Dewa Approval. (Note: Package A/C With Ozone Depletingrefrigerant R-22 Is Not Acceptable, And Not To Be Quoted. The Packageunits Of Nominal Cooling Capacity Less Than Specified Above Is Notacceptable, And Not To Be Quoted).2.The Packaged Units Make Shall Be From One Of The Brands Previouslyapproved For Dewa (Carrier, Daikin, York, Petra, Mitsubishi) Ofacceptable Technical Perfo Rmance, Energy Efficient As Per Valid Esmaapproval And Subject To Dewa Approval As Per Technical Evaluation Priorto Issuance Of Po.3 .The Proposed Packaged Unit/S Dimensions Shall Match The Size Of Theexisting Unit/S At Site Or Else, The Contractor Shall Ensure Tha T Thereis Sufficient Space To Accommodate The Installation Of The New Unit/Swithout Hindering The Ingress/Egress And Maintenance Acc Essibility Ofexisting Units.Dewa-Confidential4.Contractor Shall Obtain From Original Equipment Manufacturer (Oem) Andenclose The Det Ails (Make And Origin) Of Major Components Such Ascompressor, Blower Motor, Evaporator Coil, Condenser Coil, Evaporatorblower, Conde Nser Fan And Motor, Expansion Valve, Filter Drier Etc.5.In The Building, Internal Temperature Requirement Is 20±2 °C Insideoffice, C Onsider The External Design Ambient Conditions Dbt 50Deg. C(Max.) And Wbt 32Deg. C (Max.) During Summer. All Items Of Packagedunits And Field Installed Items Shall Be Designed To Operate Withoutmalfunction Up To A Maximum Ambient Condition Of 52°C D.B.T And Aminim Um Ambient Condition Of 1°C D.B.T, With Instances Of 100% R.H.Contractor Shall Consider Design External Static Pressure (Esp) Of Atl East 400Pa, However, Contractor Shall Estimate Actual Esp As Per Sitecondition For Selection Of The New Units To Ensure The Cooling Capacityas Mentioned Above. Each New Package Unit Shall Operate In Conjunctionwith The Other Existing Package Unit/S In The Same Hvac System Withoutany Malfunction In (2 Duty + 1 Standby) Auto-Mode Or As Instructed Bythe Dewa- Engineer-In-Charge Of The Site. The H Vac Systems Shall Handlepredominantly Re-Circulated Air With A Controlled Quantity Of Fresh Airintroduced At Return Duct Plenum.6.Th E Package Unit Shall Be One Piece Packaged Air Cooled Ac Unit, Toachieve The Following Functions And Features, As Minimum:(A) Dual R Efrigerant Circuits.(B) Vibration Isolation For Internal Operating Components.(C) Heating Of Compressors During Standby Mode (Crank Case Heater).(D) Sight Glass To Monitor The Refrigerant Circuit.(E) Filter Drier Replacement Shall Be Possible Without Loss Ofrefrig Erant And Cutting Of Copper Pipes.(F) Electric Isolation And External Overload Protection For Compressors,Blower And Condenser Fan M Otors.(G) Under Voltage Monitoring.(H) Earth Leakage Protection For The Complete Unit.(I) Control Circuit Supply Shall Be 220V Ac.(J ) Low Ambient Pressure Control By Fan Cycling Switch(K) Lead / Lag Switch For Dual Compressors, Internal Protection, Andshort Cyclin G Prevention.(L) Low-Pressure And High-Pressure Switches For Each Circuit.(M) Thermostatic Expansion Valves For Each Circuit.Dewa-Co Nfidential(N) Electrical And Control Panel With Weather-Proof Enclosure Withinternal Partitions.7.Provision For Individual Faults In Dication To Be Made On Airconditioning Units Control Panel. Manufacturer Shall Ensure Thatsufficient Auxiliary Contacts Are Made Ava Ilable In The Packaged Unitsfor Interfacing With Bmc System.8.The Package Units With Microprocessor Controller Shall Be With Digital Display Of Faults/Faults# Log And A Push Button To Enable Resetting Ofalarms.9.The Evaporator And Condenser Coils Shall Be Copper Pl Ate Finsmechanically Bonded To Seamless Copper Tubes, With All Joints Brazed.Good Quality Anti-Corrosion Coating Should Be Provided To Condensercoils From Factory. Condenser Coil Guard Shall Be Provided.10.The Unit Cabinet Shall Be Constructed Of Suitable Material For Outdoorinstallation With Weather-Proof Corrosion Resistant Marine Coatingpaint. Evaporator Panels Should Be Double Skin. The Ca Binet Panel Shallbe Easily Removable For Service To All Components. Unit Shall Bedesigned To Easily Drain Out The Condensate Water.1 1.The Blower Supply Fan Shall Be Selected To Achieve The Design Air Flowwith Direct Or Belt Driven Type, As Per The Site Requirement Matchingwith Other Packaged Unit/S In The Same System. Fan Motor Shall Be Withpermanently Lubricated Bearing. Blower Fan Motor Shal L Be Selected Toensure Non-Overloading Type Operation With Minimum Of 10 % Of Powerreserve.12.The Condenser Fan Shall Be Of The Prop Eller Type With Direct Driven,Totally Enclosed, Permanently Lubricated Motors. The Condenser Fansshall Discharge Upwards. Package Un It Shall Have Minimum 2Nos. Condenserfans. Condenser Fan Motors Shall Be Suitable For Operation In An Ambientair Temperature Of 55°C .13.The Return Air Filter Shall Be 50Mm Thick Good Quality Aluminum Filter,Washable Type And Suitable For Permanent Use. Filtera Shall Besupported In Rigid Peripheral; Frames With Internal Or External Pvccoated Wire Support Of The Media To Ensure That The Med Ia Shall Notcollapse Under Airflow. The Holding Frames Shall Incorporate Accuratelysized Channel Sections To Provide A Good Sliding For The Filters.14.Contractor Shall Supply And Install All Necessary Field Controls Andcontrol Wiring, Including But Not Limited To, Duty Change Over,Manual/Auto/Off Selection, Supply Air Temperature Sensor, Differentialpressure Switch, Airflow Switch, Return Air Temperature/Humidity Sensoretc. Necessary For The Automatic Operation Of The New Packaged Units Toprovide A Smooth Hvac System Contr Ol And Operation In The Substation.Dewa-Confidentialcontractor Shall Carry Out Necessary Interlocking Of New Packaged Unitswith Hvac Control Panel Of The Substation As Per Site Condition Toachieve All Designed Operations Both In Automatic Mode (Normal Mode) Aswell As In Manual Mode Under Maintenance Conditions. The Units Shall Becontinuously Available For Cooling And Shall Be By Return Airtemp Erature/ Humidity Sensors To Achieve On/Off Control Of Compressor.15.Replace The Supply And Return Duct Branches And The Duct Suppor T Of Oldpackage Unit On The Roof With New Rectangular Ducting Made Of Gi Sheetof Minimum 0.8Mm Thickness All As Per Ashrae/ Dw144/Sm Acna. Install Newsupply And Return Ducting Branches In Alignment With The Mouthconnection Of New Package Ac Units Using Good Quality Flexible Ductconnector At One End. The Supply And Return Air Ducting Arrangement Andmouth Connections Of The New Packaged Ac Units Shall Match With Theexisting Arrangement At Site To Ensure Easy Connection And Smoothairflow. The New Supply And Return Ducting Bran Ches Shall Connect Withthe Existing Supply And Return Duct Plenums Respectively At The Otherend. For All New Duct Branches Connectin G With New Pac Medi 2 Ea Standard Terms & Conditions 1) Prices Should Be Ddp Delivery Duty Paid At Dewa Stores. 2) Quotation To Be Submitted Only In Local Currency U.A.E Dirhams 3) Dewa Standard Payment Terms Is 30 Days Credit From The Date Of Acceptance Of Material 4) No Dewa Staff Or His Or Her Relatives Up To Third Degree Should Have Ownership Or Partnership In Your Company, And Your Participation In Dewa Tenders / Rfqs Should Not Constitute A Conflict Or Perceived Conflict Of Interest. Supplier Registration: Https://Srm.Dewa.Gov.Ae/Irj/Portal/Anonymous/Regis Tender Link : Https://Srm.Dewa.Gov.Ae/Sap/Opu/Odata/Sap/Zsrm_Rfx_Reg_Bid_Srv/Attachmentset(2492600457)/$Value
|
