Skilled HVAC / Chiller Technician

Skilled HVAC / Chiller Technician

United for Manpower Solutions
Doha Qatar
5 - 8 Years
Not Specified

Job Description

Job Description
The position is responsible for operating the HVAC & Refrigeration plants and daily logging of all operating conditions. To perform periodical, preventive, and breakdown maintenance of large HVAC and refrigeration plants. Knowledge on large seawater cooled chillers, trouble shooting on electrical and electronic controls of air-conditioning systems are desired.

  • Responsible for all on site coordination with company personnel
  • Requesting and closing the work permit and to carry out the permitted jobs in line with HSE requirements
  • Co-ordinate with company warehouse for issue of materials
  • Ensure that all activities related to his discipline are performed safely and efficiently in line with company objectives
  • Attend and conduct the toolbox meetings
  • General cleaning of equipment
  • Cleaning of water line pot strainer
  • Checking and tightening of glands of pumps and water valve
  • Cleaning of suction line strainer of compressor
  • Checking and tightening foundation bolts of equipment
  • Checking of correctness and calibration of all safety and automatic valves. Replacement of defective ones
  • Checking of all pumps
  • Checking of bearing clearance
  • Checking of crankshaft seal and leakage, replacement of inner and outer neoprene O rings
  • De-scaling of condenser tubes
  • Cleaning and greasing of all bearings
  • Check/Replacement of gland packing / mechanical seal of pumps and water line valves
  • Carry out de-brazing / brazing of refrigeration pipe lines, identifying the leaking point in gas circuit, and repairing the same
  • Checking of plug, switch, and other connections against tightness with special reference to Earthing
  • Inspect V-belt drives for conditions and alignment, adjust, replace if necessary
  • Check alignment of pulleys are correct and tightly fixed to shaft
  • Check water quality and complete log for chilled water systems. Adjust chemical closing as necessary, alternate biocide.
  • Check filter manometer readings, clean/replace filter media as indicated
  • Check continuity and insulation resistance of motor winding
  • Lubricate pump and motor bearings
  • Check all damper actuators are securely mounted
  • Check that motors correctly operate across the desired damper movement with ease and do not stall
  • Check linkages are secure and all blades on damper operate
  • Inspect all equipment control panel for all electrical connections for tightness; condition and operation of: Contractors, overloads, timers, relays, sequence of operation, motors, and compressors, circuit breakers for erosion, and dirt accumulation
  • Overhaul motor. Check condition of motor brushes; replace where required. Clean and test motor winding; Check terminals are secure; Check that motor FLC does not exceed data plate value; Check bearing wear by measuring shaft float and end play.
  • Inspect and replace where necessary compressors valve springs and reeds. Fabricate new head gaskets.
  • Inspect loading / unloading solenoid valves, and replace if necessary
  • Inspect cylinder scraper and other piston rings, replace as necessary
  • Check operation of all types of pressure, flow, and temperature switches / transmitters and calibrate if required; Record the offsets
  • Check crankcase oil heaters and controls maintaining correct temperature
  • Change liquid line drier cores
Skills and Experience
  • Adequate Electrical and Electronic knowledge of AC Control and control panels
  • Knowledge in Temperature, pressure, and flow switches, and transmitters and motorized valves
  • Minimum of 5 years experience on maintenance of AC plants and chillers, preferably in the industrial environment
  • Must be able to read and understand electrical and control wiring diagrams of AC Plants, able to read maintenance instructions and manuals
  • Knowledge of English, both spoken and reading is essential
  • Should pass the permit receiver exam conducted by QAFCO safety section

Educational Qualifications
  • Diploma in Air-conditioning and Refrigeration and Industrial Training or Tradesman Certificate with good knowledge of English. Minimum 5 years experience in Facilities and Maintenance Projects preferably in Oil and Gas / Petrochemical live plants environment

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