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Quotation are invited for Supply, Installation, Testing & Commissioning of 2 Nos. Double Skin Air Cooled Package AC Units including Associated Ducting, Electrical Works, BMS Integration, and Removal of Existing Units at Service Tunnel 4. SUPPLY, INSTALLATION, TESTING & COMMISSIONING OF 2 NOS. DOUBLE SKIN AIRCOOLED PACKAGE AC UNITS INCLUDING ASSOCIATED DUCTING, ELECTRI CAL WORKS,BMS INTEGRATION, AND REMOVAL OF EXISTING UNITS AT SERVICE TUNNEL # 4.A.TECHNICAL SPECIFICATIONCONTRACTOR SCOPE OF WORK:SUP PLY, INSTALLATION, TESTING, AND COMMISSIONING OF NEW DOUBLE-SKINPACKAGE AIR CONDITIONING UNITS, INCLUDING ALL ASSOCIATED WORKS SUCH ASNEW DUCTING BRANCHES, BMS INTEGRATION, SUPPORTS, INSULATION, ANDACCESSORIES, FOR REPLACEMENT OF THE EXISTING OLD PACKAGE UNIT AND ITSCONNECTED DUCTING SYSTEM AT SERVICE TUNNEL#4, IN ACCORDANCE WITH PROJECTSPECIFICATIONS AND AUTHORITY REQUIREMENTS.THE CONTRACTOR# S SCOPE SHALL ALSO INCLUDE THE COMPLETE REMOVAL OF THEEXISTING PACKAGE UNIT AND ALL ASSOCIATED DUCTING BRANCHES FROM THEBUILDING ROO F. THIS INCLUDES SAFE ISOLATION, DISMANTLING, HANDLING,LOADING, TRANSPORTATION, AND DISPOSAL OF ALL REMOVED MATERIALS AT THEDEWA RUW AIYAH SCRAP YARD, IN FULL COMPLIANCE WITH APPLICABLEREGULATIONS, SAFETY STANDARDS, AND AUTHORITY REQUIREMENTS.SI NO.BUILDINGEXISTING UNIT MODEL NUMBEREXISTING UNIT SERIAL NUMBER1SERVICE TUNNEL-4DMS360C00A444BDM (YORK)SHF300000201112SERVICE TUNNEL-4DMS360C00A444BDM (YORK)SHF300000210111.ENVIRONMENT FRIENDLY REFRIGERANT SHALL BE USED SUCH AS R 407C / R410A /R134A 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 CAPAC ITY LESS THAN SPECIFIED ABOVE IS NOTACCEPTABLE, AND NOT TO BE QUOTED).2.THE PACKAGED UNITS MAKE SHALL BE FROM ONE OF THE BRANDS PREV IOUSLYAPPROVED FOR DEWA (CARRIER, DAIKIN, YORK, PETRA, MITSUBISHI) OFACCEPTABLE TECHNICAL PERFORMANCE, 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 DIMENSI ONS SHALL MATCH THE SIZE OF THEEXISTING UNIT/S AT SITE OR ELSE, THE CONTRACTOR SHALL ENSURE THAT THEREIS SUFFICIENT SPACE TO ACCOMMO DATE THE INSTALLATION OF THE NEW UNIT/SWITHOUT HINDERING THE INGRESS/EGRESS AND MAINTENANCE ACCESSIBILITY OFEXISTING UNITS.4.CONTRAC TOR SHALL OBTAIN FROM ORIGINAL EQUIPMENT MANUFACTURER (OEM) ANDENCLOSE THE DETAILS (MAKE AND ORIGIN) OF MAJOR COMPONENTS SUCH ASCOMP RESSOR, BLOWER MOTOR, EVAPORATOR COIL, CONDENSER COIL, EVAPORATORBLOWER, CONDENSER FAN AND MOTOR, EXPANSION VALVE, FILTER DRIER ETC. 5.IN THE BUILDING, INTERNAL TEMPERATURE REQUIREMENT IS 20±2 °C INSIDEOFFICE, CONSIDER THE EXTERNAL DESIGN AMBIENT CONDITIONS DBT 50D EG. 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 AMINIMUM AMBIENT CONDITION OF 1°C D.B.T, WITH INSTANCES OF 1 00% R.H.CONTRACTOR SHALL CONSIDER DESIGN EXTERNAL STATIC PRESSURE (ESP) OF ATLEAST 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 DEWAENGINEER-IN-CHARGE OF THE SITE. THE HVAC SYSTEMS SHALL HANDLEPREDOMINANTLY RE-CIRCULATED AI R WITH A CONTROLLED QUANTITY OF FRESH AIRINTRODUCED AT RETURN DUCT PLENUM.6.DOUBLE SKIN PACKAGE UNIT SHALL BE ONE PIECE PACKAGED AIR COOLED AC UNIT,TO ACHIEVE THE FOLLOWING FUNCTIONS AND FEATURES, AS MINIMUM:(A) DUAL REFRIGERANT CIRCUITS.(B) VIBRATION ISOLATION FO R INTERNAL OPERATING COMPONENTS.(C) HEATING OF COMPRESSORS DURING STANDBY MODE (CRANK CASE HEATER).(D) SIGHT GLASS TO MONITOR THE RE FRIGERANT CIRCUIT.(E) FILTER DRIER REPLACEMENT SHALL BE POSSIBLE WITHOUT LOSS OFREFRIGERANT AND CUTTING OF COPPER Qty: 2 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(2492600387)/$value
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