Standard Maintenance; Level 1 Maintenance; Level 2 Maintenance; Level 3 (Or Higher) Maintenance - Carrier AquaForce PUREtec 30XW-VZE 451 Installation, Operation And Maintenance Instructions

11 - STANDARD MAINTENANCE

Air conditioning equipment must be maintained by professional
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 interventions
- protection of the environment
There are five maintenance levels for HVAC units, as defined by
the AFNOR X60-010 standard.

11.1 - 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
TM
report in the SmartVu
General visual inspection for any signs of deterioration.

11.2 - Level 2 maintenance

This level requires specific know-how in the electrical, hydraulic
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 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 the filter condition.
- Check the presence and the condition of the electrical
protection devices.
- Replace the fuses every 3 years or every 15000 hours (age-
hardening).
- 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.
control manual).

11.3 - Level 3 (or higher) maintenance

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, 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
NOTE: 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

11.4 - Tightening of the electrical connections

11.4.1 - Tightening torques for the main electrical
connections
Screw type
Customer connection
Screw-nut M12 at phase decks
Nut on earth terminal
Downstream power connections in the control box
Screw M10 at downstream main
disconnect deck (QS10)*
Earth terminal M10
Power connections in the variator
M10 nut on the phase pin
M10 nut on the earth pin
Compressor phase connection terminals
M12
M16
Compressor earth connection
Control disconnect connections
Upstream and downstream screws at
terminals
ATTENTION: The tightening of the connections at the
compressor terminals requires special precautions. Please
refer to the chapter below.
Designation Torque
in the unit value, N·m
L1/L2/L3 50
PE 81
L1/L2/L3 50
50
GS-
19-40
19-40
1/2/3/4/5/6
23
on EC-
1/2/3/4/5/6
30
on EC-
Gnd on EC- 25
QF 2
27