Inactive
Notice ID:FAC206023_MAINT_HVAC_SYSTEMS
The embassy of the United States in Perú – NAMRU-6 is requesting a contract 04 maintenance service for HVAC Chiller of 160 TN, 01 maintenance to 05 air handlers, 01 maintenance to all VSD and 01 maint...
The embassy of the United States in Perú – NAMRU-6 is requesting a contract 04 maintenance service for HVAC Chiller of 160 TN, 01 maintenance to 05 air handlers, 01 maintenance to all VSD and 01 maintenance to the four main pumps. The performance period: September 30, 2020 to September 29, 2021. 1. WORK DISCRIPTION 1.1.- CHILLER: (Brand: York Model: YCAV0157PA28VAC & Cap. 157 TN) Provide four Bi-monthly maintenance on Saturdays. Emergency calls 24 hr. from Monday to Sunday. -Verify de oil level in the separator of oil -Verify de level of humidity / Humidity indicator -Verify operation parameters (electrical, pressure and temperature) -Verify correct set-points of operation and security. -Inspect the condition of the condenser grills (cleaning is required) -Visual inspection of oil leaks -Inspect the motors and fans of the condensers -Inspect the correct rotation of the ventilator -Inspect any abnormal or excessive noise -Inspect the interrupter of water flow -Inspect the temperature sensors and transducers -Verify the general conditions of the equipment -Verify the contactors from the ventilators -Verify the insulation of the heat exchangers -Verify and adjust the electrical connections -Verify the compressors resistance -Inspect leaks of refrigerant -Verify the value of the super-heater in the evaporator. -Verify the economizer valve at the entrance or the compressor -Verify the sub-cooling value at the condenser -Analyze oil and the refrigerant - Vibration analysis -Change oil filters -Inspect the liquid lines, parallel to the change of filters -Check the resistance’s ohms of the compressor and ventilators -Register the operation conditions and collect the data -Operation test -Cleaning around the working area 1.2. - AIR HANDLERS (AHU) Preventive maintenance works with 05 units of AHU’s. Two units are York and three Semco brand. The preventive maintenance is for one service and performed on Saturdays. -Start the engines check for operational deficiencies -Verify general conditions of the equipment -Verify parameters (electrical/mechanical) -Revision of contactors and/or start buttons -Revision of water valve -Inspection of the resistance (in case they have on) -General revision of the coils -Inspect the V-belts -Lubricate the shafts and bearings -Cleaning de collecting tray -Clean the air filters -Inspect, cleaning and disinfecting the drainage -Inspect the condition of the coil’s motor fan -Inspect noises and abnormal vibrations -Verify and adjust electrical connection. -Verify painting of the dampers and lubrication -Verify the calibration of the filters (pressure differential) -Verify refrigerant (in case of direct expansion) or water leaks -Lubrication of bearings -Electrical mega roll (electrical ventilator and compressor) -Cleaning of the cabinets -Pressurized cleaning of the coil -Register the parameters (electrical, temperature and pressure) and the conditions of operation -Cleaning and grease the doors of the air handlers -Operation test 1.3. - VARIABLE SPEED DRIVES (VSD) The total preventive maintenance is 9 VSD, divided into 5 in AHU’s, 2 in the chiller and 2 in the boiler HVAC. The preventive maintenance is for one service and prioritize on Saturdays or previously coordinated with NAMRU. -External cleaning of the variable speed -Disassemble the heat dissipater -Cleaning the internal parts with dielectric -Assembly and test for operation LIST OF VSD OF THE HAVC EQUIP. UNIT BRAND MODEL SERIAL POWER OBSERVACIONS CHILLER 02 Telemecanique ATV71HU75M3 SW0851000 051/52 7.5kw-10HP 240v Broken display BOILER 02 Telemecanique ATV71HU15M3 No visible 1.5kw-2 HP240v Broken display AHU101 01 DANFOSS VLT 2800 No visible 15HP240v Operative system AHU102 01 YASKAWA CIMR-E7U2011 No visible 30HP240v Operative system AHU103 01 YORK AYK550-UH- 017A-2+K465 2083903526 15HP240v Operative system AHU202 01 YASKAWA CIMR-E7U2011 No visible 15HP240v Operative system AHU201 01 ABB ASC550-01- 046A-2 1063305036 15HP240v Operative system 1.4.-CHILLER & BOILER PUMPS OF THE HVAC Preventive maintenance of 2 electrical pumps of the chiller and 2 pumps of the boiler. The preventive maintenance is for one service and prioritize on Saturdays or previously coordinated with NAMRU. -Disassemble the motors y pumps -Disassemble the rotor -Replacement of the bearings -Cleaning of the coil with dielectric solvent -Apply dehumidifier solvent -Heat treatment de the coil -Coil’s meg -Apply varnish, then to the oven and at last paint de motor -Revision of pump seals and replace gaskets - Operation test * Characteristics of the Chiller pumps -Brand: Bell & Gossett. -10 HP. -Serial: CO74527-02L80. -Size: 1531. -RPM: 1800. -Quantity: 2. * Characteristics of the Boiler pumps -Brand: Bell & Gossett. -5 HP -Serial: CO74526-01L80. -Size: 1531. -RPM: 1800 -Quantity: 2. 2.- PERSONAL PROTECTIVE IMPLEMENTS -The contractor shall utilize the appropriate personal protective implements (gloves, safety glasses, harness, dust mask, respirators, etc.) -Shall Use the appropriate tools (compressors, press, grinders, etc.). -The tools must have the correct outlet and must be protected by any overvoltage 3.- SPECIAL CONDITIONS - Payment will be executed after 30 working days of culmination of work - The quotation should be directed to the American Embassy, with attention to the Procurement Department (NAMRU6). - Work must be scheduled between Mondays to Saturday from 0800 to 16:30 hrs. If there’s a change with the customer, you will finally arrange with NAMRU - The contractor will send in with24 Hr. of anticipation the relation of workers. - It is responsivity of the contractor to clean the material leftovers and debris.
