CIAT AQUACIAT POWER ILD Series, Инструкция по эксплуатации

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13 - STANDARD MAINTENANCE
Hydraulic:
- When working on the water circuit, take care not to damage
the adjacent air heat exchanger,
- Check the water connections,
- Check the condition of the expansion tank (presence of
corrosion or loss of gas pressure) and replace it if required,
- Drain the water circuit (see chapter “Water flow control
procedure”),
- Clean the water filter (see chapter “Water flow rate control
procedure”),
- Replace the gland packing of the pump after 20000 hours of
operation and the bearings after 17500 hours,
- Check the operation of the low water flow safety device,
- Check the condition of pipe thermal insulation,
- Check the concentration of the anti-freeze protection solution
(ethylene glycol or propylene glycol),
- Check the water flow using the heat exchanger pressure
difference,
- Check the condition of the heat transfer fluid or the water
quality,
-
Check for corrosion of the steel pipe work.
Refrigerant circuit checks:
-
The unit is subject to F-gas tight regulatory checks. Please
refer to the table in the introduction.
-
Check the unit operating parameters and compare them with
the previous values,
-
Check the operation of the high pressure switches. Replace
them if defective,
-
Check the fouling of the filter drier. Replace it if required.
-
Keep an up-to-date service booklet specific to the refrigeration
unit in question.
Ensure all adequate safety measures are taken for
all these operations: use appropriate PPE (personal
protective equipment), comply with all industry and
local regulations, use common sense.
13.3 - Level 3 maintenance
Maintenance at this level requires specific skills, qualifications,
tools and expertise. Only the manufacturer, his representative
or authorised agent are permitted to carry out this work.
This maintenance work relates to the following:
-
Replacement of major components (compressor, water heat
exchanger),
-
Operations on the refrigerant circuit (handling refrigerant),
-
Modification of factory-set parameters (change of application),
-
Movement or disassembly of the refrigeration unit,
-
Any operation due to proven lack of maintenance,
-
Any operation covered by the warranty,
-
One or two leak detection operations per year performed by
qualified personnel using a certified leak detector.
-
To reduce waste, the refrigerant and the oil must be transferred
in accordance with applicable regulations, using methods that
limit refrigerant leaks and pressure drops and with materials
that are suitable for the products.
-
Any detected leaks must be repaired immediately
-
The compressor oil that is recovered during maintenance
contains refrigerant and must be treated accordingly.
-
Refrigerant under pressure must not be vented to the open
air.
-
If the refrigerating circuit must be opened, cap all openings
for a period of up to one day. If open for longer, blanket the
circuit with a dry, inert gas (e.g. nitrogen).
13.4 - Tightening of the electrical
connections
Component
Designation
in the unit
Value
(N.m)
Welded screw PE, customer connection - 40
Screw terminal, fuse holder FU1, FU2, FU3, FU4 10
Screw terminal, fuse holder FU100 0.8-1.2
Screw terminal, compressor contactor KM1-->KM12 3 - 4,5
Brass screw M6, compressor ground EC- 5
M6 screw, compressor connection EC- 5
Screw terminal, circuit breakers QM-, QF- 1
Screw terminal, pump contactor KM90, KM90A 2,5
M8 screw customer connection (size 602-1000) QS100 15 - 22
M10 screw customer connection (size 1150-1600) QS100 30 - 44
M12 screw customer connection (size 1800-2000) QS100 50 - 75
Screw terminal, circuit breakers (size 602-1200) QF100 3.2-3.7
Screw terminal, circuit breakers (size 1400-2000) QF100 8-10
Screw terminal, fuse holder 32A
(power factor correction option)
Fu- 2,5
Screw terminal, fuse holder 100A
(power factor correction option)
Fu- 3.5 - 4
13.5 - Tightening t orques for the main
fastenings
Screw type Use Value (N.m)
Metal screw D=4.8 Condensing module, casing, supports 4,2
Metal screw D=6,3 Plastic volute 4,2
Taptite M10 screw
Air coil sub-assembly, chassis-structure,
electrical box fixing, plate heat
exchanger and pump
30
Taptite M6 screw
Pipe supports, enclosure, variable
frequency drive supports
7
H M6 screw Pipe clip 10
H M10 nut
Compressor chassis, Compressor fixing
and buffer tank
30
Oil equalisation screw Oil equalisation line 145
M16 screw Refrigerant accumulator tank flange 180
13.6 - Air-cooled exchanger
We recommend that coils are inspected regularly to check the
degree of cleanliness. This depends on the environment where
the unit is installed, in particular urban and industrial sites, and
for units installed near trees that shed their leaves.
Recommendations for maintenance and cleaning of copper
pipe coils and aluminium fins (RTPF):
- Regularly cleaning the coil surface is essential for correct unit
operation.
- Eliminating contamination and removal of harmful residue will
increase the operating life of the coils and the unit.
-
Specific recommendation in case of snow: For long term
storage, regularly check that no snow has accumulated on
the coil.
-
Clean the coils completely using a low pressure jet and a
biodegradable cleaning agent.
-
It is essential to control the pressure and take care not to
damage the fins.
EN-65 AQUACIAT POWER ILD