Hitachi RCUE210AG2 User Manual

SMGB0003 rev.0 - 11/2006
pag. 150
Maintenance
6.1. Maintenance criteria
Check Item
Check
Frequency
Criteria (procedure) Remarks
1. General
Noise
A/N
Confi rm if there is no abnormal noise.
Judge from aprox. 1m
from the control panel
surface.
Vibration
A/N
Confi rm visually if there is no abnormal vibration
Confi rm visually if there is no abnormal vibration
2. Cabinet
Outside board
and inner
Dirt
A/N
Clean with cloths
Rust
A/N
Perform repair painting with Anticorrosion paint
Vibration
A/N
Re-tighten screws
Re-tighten screws
3. Refrigerant Circuit
General
Refrigerant leakage
once/ season
Confi rm if there is no refrigerant leakage by
using detecting device in each component
and pipe connection parts. As for checking
for leakage in water cooler and condenser,
confi rm it with the air discharged to water inlet
and outlet, and in this, case water should be
drained.
Capillary pipes
once/
season
Perform visual check if there is no contact or
resonance.
Compressor
Noise
A/N
Confi rm if there is no abnormal noise at starting,
operating and stop.
Oil leakage bleed
A/N
Confi rm if there is no oil leakage or bleed from
the compressor.
Oil level
A/N
Perform visual check by sight glass.
Insulation Resistance
once/
season
More than 3MΩ at 500V DC
Oil Heater
once/
season
Apply current during compressor stop.
Ageing of Vibration
Insulation rubber
once/
season
Touch and confi rm if they have rubber elasticity.
Intermediate check (1)
once/ 3,000 hr
Pay special attention to noise, vibration and oil
leakage etc.
See following
”maintenance criteria
of Screw compressor”
for details
Intermediate check (2)
once/ 6,000 hr
Confi rm if safety device and protection device
function well.
Overhauling
once/ 24,000 hr
(water-cooled)
40,000 hr
(Air-cooled)
Overhaul the compressor and check it according
to the specialist’ advice.
Condenser
(air-cooled)
Fin clogging
once / season
Clean it spraying warm water (less than 40ºC).
Condenser
(water-cooled)
Water fl ow, water temp.
A/N
Confi rm if they are within the criteria
See technical
catalogue for details.
Water quality
once/
month
Confi rm if it is within the criteria.
See technical
catalogue for details.
Cleaning
A/N
Confi rm if high pressure is within the criteria.
Perform the predetermined cleaning.
Frequency of cleaning
differs depending on
result of water quality
or operation time.
Drain water
once/ season
If condenser is not used for intermediate or long
period, drain water. At this time, open also plug
for draining water and for removing air.
for draining water and for removing air.

Hitachi RCUE210AG2 Specifications

General

Brand	Hitachi
Model	RCUE210AG2
Category	Chiller
Language	English