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4.3 - Recommended maintenance and main component replacement schedule
Standard controls
Component
Type
Ar
ea inspection
Inspection
Remarks
Vacuum
ar
ea
Non-
vacuum
ar
ea
Item
Method
Interval
Main shell
Chilled/hot water line pipes
X
Corr
osion of the heat transfer tube
surface
Visual inspection
As necessary
Random inspection fr
om the bundle (no vaccuum destruction)
X
Corr
osion of the inter
nal surface of the
heat transfer tube scale and/or slime
adhesion
Eddy-curr
ent test/endoscope/visual
inspection
Once a year
Idem above
Cooling water line pipes
X
Corr
osion of the heat transfer tube
surface
Visual inspection
As necessary
Idem above
X
Corr
osion of the heat transfer tube
surface. Scale and/or slime adhesion
Eddy-curr
ent test/endoscope/visual
inspection
Once a year
Idem above
Heat exchanger tube
X
Corr
osion of the heat transfer tube
surface. Reduced metal by abrasion
scale and/or slime adhesion
Overhaul
As necessary
Idem above
Generator
X
Check the inside fouling
Visual inspection etc.
Once a year
Cleaning
Solution
Absorbent
( X )
Solution analysis
Concentration
Alkalinity
Inhibitor ratio
Copper dissolution ratio
Iron dissolution ratio
Solution random inspection
Two to four times
per year
To be adjusted to the standar
d contr
ols
Pump
Absorbent pump
X
Pump body
, impeller
, bearing, motor
Overhaul
As necessary
Inspection interval 20000 hours or mor
e
Refrigerant pump
X
Pump body
, impeller
, bearing, motor
Overhaul
As necessary
Idem above
Pur
ge pump
( X )
Pump body
Overhaul
As necessary
-
V-belt
Periodic r
eplacement
As necessary
-
Safety device
Pr
essur
e switch
( X )
Periodic r
eplacement (because of safety device)
Every 3 years
Generator pr
essur
e switch for 16DJ
Contr
ol device
Flow switch
X
Periodic inspection with a maintenance contract
As necessary
-
Temperatur
e sensor
X
Periodic inspection with a maintence contract
As necessary
-
Electr
o-magnetic contactor
X
-
Relay
X
-
Inverter
X
Idem above
Once a year
Option
Others
Sight glass
X
Periodic r
eplacement ((in or
der to avoid leakage)
Every 3 years
-
Diaphragm valve packing
X
Every 3 years
-
Other packing
X
Every 3 years
-
Palladium cell
X
Every 3 years
-
W
ater
-line packing
X
Periodic inspection with a maintenance contract.
Every 3 years
-
