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12 - sTaNDaRD MaINTENaNCE
Air conditioning equipment must be maintained by profes-
sional technicians, whilst routine checks can be carried out
locally by specialised technicians.
Simple preventive maintenance will allow you to get the
best performance from your HVAC unit:
•
improved cooling performance
•
reduced power consumption
•
prevention of accidental component failure
•
prevention of major time-consuming and costly inter-
ventions
•
protection of the environment
There are five maintenance levels for HVAC units, as
defined by the AFNOR X60-010 standard.
12.1 - level 1 maintenance (see note)
Simple procedure can be carried out by the user:
•
Visual inspection for oil traces (sign of a refrigerant
leak)
•
Air heat exchanger (condenser) cleaning - see chapter
"Condenser coil - level 1"
•
Check for removed protection devices, and badly
closed doors/covers
•
Check the unit alarm report when the unit does not
work (see report in the 30XA Pro-Dialog Plus control
manual).
General visual inspection for any signs of deterioration.
12.2 - level 2 maintenance (see note)
This level requires specific know-how in the electrical,
hydronic and mechanical fields. It is possible that these
skills are avail-able locally: existence of a maintenance
service, industrial site, specialised subcontractor.
In these cases, the following maintenance operations are
recommended.
Carry out all level 1 operations, then:
•
At least once a year tighten the power circuit electrical
connections (see tightening torques table).
•
Check and re-tighten all control/command connections,
if required (see tightening torques table).
•
Check the differential switches for correct operation
every 6 months (free-cooling option 118A).
•
Remove the dust and clean the interior of the control
boxes, if required.
•
Check the presence and the condition of the electrical
protection devices.
•
Check the correct operation of all heaters.
•
Replace the fuses every 3 years or every 15000 hours
(age-hardening).
•
Replace the control box cooling fans used with option
22 (with designation EF22_) every five years.
•
Check the height of the anti-vibration mountings
(located between the compressor rails and the unit
chassis) after 5 years of operation, and then each year.
When the total minimum height of the mountings is
less than 28 mm replace the mountings.
42
•
Check the water connections
•
Purge the water circuit (see chapter "Water flow control
procedure")
•
Clean the water filter (see chapter "Water flow control
procedure")
•
Fully clean the condensers with a low-pressure jet and
a bio-degradable cleaner (counter-current cleaning -
see chapter "Condenser coil - level 2)
•
Replace the stuffing box packing of the pump after
10000 hours of operation
•
Check the unit operating parameters and compare
them with previous values
•
Keep and maintain a maintenance sheet, attached to
each HVAC unit
All these operations require strict observation of adequate
safety measures: individual protection garments, compliance
with all industry regulations, compliance with applicable
local regulations and using common sense.
12.3 - level 3 (or higher) maintenance (see note)
The maintenance at this level requires specific skills/
approval/tools and know-how and only the manufacturer,
his representative or authorised agent are permitted to
carry out these operations. These maintenance operations
concern for example:
•
A major component replacement (compressor, evapo-
rator)
•
Any intervention on the refrigerant circuit (handling
refrigerant)
•
Changing of parameters set at the factory (application
change)
•
Removal or dismantling of the HVAC unit
•
Any intervention due to a missed established mainte-
nance operation
•
Any intervention covered by the warranty
NOTE: Any deviation or non-observation of these mainte-
nance criteria will render the guarantee conditions for the
HVAC unit nul and void, and the manufacturer, France,
will no longer be held responsible.
12.4 - Tightening torques for the main electrical
connections
Component
Screw on bus bar, customer connection
M8
M10
Soldered screw PE, customer connection (M12)
Tunnel terminal screw, compressor contactor
Contactor 3RT103*
Contactor 3RT104*
Contactor 3RT105*
Contactor 3RT106*
Tunnel terminal screw, current transformer
Size 2 (3RB2956*)
Size 3 (3RB2966*)
Compressor earth terminal in the power wiring
control box, terminal M8
Compresor phase connection terminals M12
Compressor earth connection
Tunnel terminal screw, disconnects 3RV1011*
Tunnel terminal screw, hydronic pump contactor
Contactor 3RT101*
Contactor 3RT102*
Screw on bus bar for power connection between
the control boxes for option 81
Designation
Value
in the unit
(Nm)
18
L1/L2/L3
30
PE
70
5
11
KM*
21
11
TI*
21
Gnd
30
1/2/3/4/5/6 on EC
25
Gnd on EC*
25
QF*/QM*
1
KM90*
1
2.2
L1/L2/L3
30
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