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• 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).
• 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.
The maintenance at this level requires specific skills/approval/
tools and know-how and only the manufacturer, his repre-
sentative or authorised agent are permitted to carry out
these operations. These maintenance operations concern
for example:
• A major component replacement (compressor,
evaporator),
• 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
maintenance operation,
• Any intervention covered by the warranty.
Any deviation or non-observation of these maintenance criteria will render
the guarantee conditions for the HVAC unit nul and void, and the manufacturer,
Carrier France, will no longer be held responsible.
Connection sleeve - Piping to be welded with Victaulic connection Ease-of-installation 30RB 162-802
Energy Management Module EMM - See controls manual Easy connection by wired connection to a building
management system
30RB 162-802
Scrolling Marquee Interface - Remotely installed user interface (communication
bus)
Remote chiller control up to 300 m 30RB 162-802
Power cable connection side extension - Side extension on the power control to allow a
reduced cable bend radius
Use of thicker power cables 30RB 302-802
Connection sleeve, standard unit - Water inlet/outlet extension for connection with a
Victaulic collar on the water inlet/outlet piping
Facilitates connection 30RB 162-262
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 work
• protection of the environment
There are five maintenance levels for HVAC units, as
defined by the AFNOR X60-010 standard.
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 30RB Pro-Dialog Plus control manual).
• Verification of the charge in the liquid line sight glass,
• Verify that the temperature difference between the
heat exchanger inlet and outlet is correct.
• General visual inspection for any signs of deterioration.
This level requires specific know-how in the electrical,
hydronic and mechanical fields. It is possible that these
skills are available 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 with tightening torques opposite).
• Check the expansion tank for signs of excessive corro-
sion or gas pressure loss and replace it, if necessary.
• Check and retighten all control/command connections,
if required (see table with tightening torques opposite).
• Remove the dust and clean the interior of the control
boxes, if required.
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