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Absorption Technology SANYO Electric Co.,Ltd.
Daily Maintenance  Date & Time Inspection of the chiller Operation data record WHO? Operator Ambient temperature Chilled water flow rate / inlet temp. / outlet temp. Cooling water (at cooling mode) flow rate / inlet temp. / outlet temp. Control valve opening rate Inverter frequency Purge tank pressure (at cooling mode) Generator pressure / temp. Abnormal noise when burner starts Abnormal noise of refrigerant pump Abnormal noise of absorbent pump Purging (Weekly operation)
Seasonal Maintenance  WHO? Service Engineer  CONTENTS Cooling season Beginning Middle External visual inspection Check of auxiliary equipment Check of insulation resistance Function test of electric and safety devices Inspection of purge pump Inspection of absorbent pump Inspection of refrigerant pump Check of  stea m  control valve  Check of vacuum condition Air purging Bubble test
Seasonal Maintenance  CONTENTS Sampling absorbent and analysis Cooling season Beginning Middle Check of cooling water quality Check of absorber / condenser Check of evaporator Tube cleaning Refrigerant blow down Confirmation of setting points Check of operation and operation date record Check and record periodic replacing parts
Cooling Water Trouble Forced blow  down (0.5) Corrosion Slime Scale
Water Quality & Trouble Corrosion Scale Slime Concentration Outer Factor pH Conductivity Cl  , SO pH M Alkalinity Ca , Si 2- 4 - Sunshine,Heat Dust ,SOx ,NH 3
Estimation of Condenser Tube Contamination (LTD)   LTD = 0 ~1℃   Refrigerant temperature in condenser  (℃)   Cooling water outlet  temperature  (℃)   : slight contamination   LTD = 2 ~ 3℃   : average contamination   LTD  >  3℃   : heavy contamination   LTD  (  L eaving  T emperature  D ifference)
Tube Cleaning  Kind of tube cleaning Kind of contamination nylon or teflon Brush cleaning Chemical cleaning acid flushing alkaline flushing Slime Calcium Silica Slime Calcium Silica soft and thick solid but easily removed by scratching solid and difficult to be removed by scratching
Management of Absorbent Solution   Corrosion protection Inhibitor Fe Cu Vacuum condition Alka l inity
[object Object],[object Object]

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PJP1(Stage2) - Slide 5

  • 1. Absorption Technology SANYO Electric Co.,Ltd.
  • 2. Daily Maintenance Date & Time Inspection of the chiller Operation data record WHO? Operator Ambient temperature Chilled water flow rate / inlet temp. / outlet temp. Cooling water (at cooling mode) flow rate / inlet temp. / outlet temp. Control valve opening rate Inverter frequency Purge tank pressure (at cooling mode) Generator pressure / temp. Abnormal noise when burner starts Abnormal noise of refrigerant pump Abnormal noise of absorbent pump Purging (Weekly operation)
  • 3. Seasonal Maintenance WHO? Service Engineer CONTENTS Cooling season Beginning Middle External visual inspection Check of auxiliary equipment Check of insulation resistance Function test of electric and safety devices Inspection of purge pump Inspection of absorbent pump Inspection of refrigerant pump Check of  stea m  control valve  Check of vacuum condition Air purging Bubble test
  • 4. Seasonal Maintenance CONTENTS Sampling absorbent and analysis Cooling season Beginning Middle Check of cooling water quality Check of absorber / condenser Check of evaporator Tube cleaning Refrigerant blow down Confirmation of setting points Check of operation and operation date record Check and record periodic replacing parts
  • 5. Cooling Water Trouble Forced blow down (0.5) Corrosion Slime Scale
  • 6. Water Quality & Trouble Corrosion Scale Slime Concentration Outer Factor pH Conductivity Cl , SO pH M Alkalinity Ca , Si 2- 4 - Sunshine,Heat Dust ,SOx ,NH 3
  • 7. Estimation of Condenser Tube Contamination (LTD) LTD = 0 ~1℃ Refrigerant temperature in condenser (℃) Cooling water outlet temperature (℃) : slight contamination LTD = 2 ~ 3℃ : average contamination LTD > 3℃ : heavy contamination LTD ( L eaving T emperature D ifference)
  • 8. Tube Cleaning Kind of tube cleaning Kind of contamination nylon or teflon Brush cleaning Chemical cleaning acid flushing alkaline flushing Slime Calcium Silica Slime Calcium Silica soft and thick solid but easily removed by scratching solid and difficult to be removed by scratching
  • 9. Management of Absorbent Solution Corrosion protection Inhibitor Fe Cu Vacuum condition Alka l inity
  • 10.