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13 - STANDARD MAINTENANCE
Air conditioning equipment must be maintained by profes-
sional technicians, whilst routine checks can be carried out
locally by specialised technicians. See the standard
EN 378-4.
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.
13.1 - Level 1 maintenance
See note "Any deviation or non-observation ..." in chapter
13.3 - "Level 3 (or higher) maintenance". 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
13.6.1 - "Level 1".
•
Check for removed protection devices, and badly
closed doors/covers
•
Check the unit alarm report when the unit does not
work. Refer to the 30XA/30XAS/30XW Touch Pilot
control manual for a more detailed explanation.
General visual inspection for any signs of deterioration.
13.2 - Level 2 maintenance
See note "Any deviation or non-observation ..." in the ext
column. 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 table 13.4).
•
Check and re-tighten all control/command
connections, if required (see table 13.4).
•
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 25 mm replace the mountings.
•
Check the water connections.
•
Purge the water circuit.
•
Clean the water filter.
•
Fully clean the condensers with a low-pressure jet and
a bio-degradable cleaner (counter-current cleaning -
see chapter 13.6.2 - "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.
•
Check the correct operation of the capacitor (power
factor correction option 231).
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.
13.3 - Level 3 (or higher) maintenance
NOTE: Any deviation or non-observation of these mainte-
nance criteria will render the guarantee conditions for the
HVAC unit null and void, and the manufacturer, Carrier
SCS will no longer be held responsible.
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.
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