Standard Maintenance; Level 1 Maintenance; Level 2 Maintenance; Level 3 (Or Higher) Maintenance - Carrier AQUAFORCE 30XW Series Installation, Operation And Maintenance Instructions

14 - 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.

14.1 - Level 1 maintenance

See note below.
Simple procedure can be carried out by the user:
• Visual inspection for oil traces (sign of a refrigerant leak)
• 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 SmartVu
• Check the clogging state of filters of aeration openings of
the control box.
General visual inspection for any signs of deterioration.

14.2 - Level 2 maintenance

See note below.
This level requires specific know-how in the electrical, hydraulic
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.
• Remove the dust and clean the interior of the control boxes,
if required. Check filter cleanliness (if present).
• Check the presence and the condition of the electrical
protection devices.
• Replace the fuses every 3 years or every 15000 hours
(age-hardening).
• Replace the control box cooling fans (if used) every five
years.
• Check the water connections.
• Purge the water circuit (see chapter 7 "Water connections").
• Clean the water filter (see chapter 7 "Water connections").
• 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.
44
Plus control manual).
TM

14.3 - Level 3 (or higher) maintenance

See note below.
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, Carrier France,
will no longer be held responsible.

14.4 - Tightening of the electrical connections

14.4.1 - Tightening torques for the main electrical
connections
Screw type
Screw on bus bar, customer connection
M10
M12
Soldered screw PE, customer
connection (M12)
Screw on fused disconnect inlet zones
Fused disconnect 1034061/M10, customer
connection
Fused disconnect 1034061/M12, Y/D outlet
Fused disconnect 3KL7141
Fused disconnect 3KL7151
Tunnel terminal screw, compressor contactor
Contactor 3RT104-
Contactor 3RT105-
Contactor 3RT106-
Tunnel terminal screw, current transformer
Size 2 (3RB2966-)
Compressor earth terminal in the power wiring control box
M12
Compressor phase connection terminals
M12
M16
Compressor earth connection
Tunnel terminal screw, water pump disconnect
Disconnect switch 3RV101-
Disconnect switch 3RV102-
Disconnect switch 3RV103-
Tunnel terminal screw, water pump contactor
Contactor 3RT102-
Contactor 3RT103-
Torque
Designation
value,
in the unit
N·m
L1/L2/L3 40
L1/L2/L3 70
PE 70
L1/L2/L3 40
QS10- 70
QS10- 70
QS10- 70
KM- 5
KM- 11
KM- 21
TI- 11
Gnd 70
25
1/2/3/4/5/6 on EC- 23
1/2/3/4/5/6 on EC- 30
Gnd on EC- 25
QM90- 2,5
QM90- 2,5
QM90- 4
KM90- 2,5
KM90- 4