Carrier 30KAV-ZE Series - Level 3 (or Higher) Maintenance; Tightening Torques

10.3 - Level 3 (or higher) maintenance
Maintenance at this level requires specic skills/qualications/
tools and expertise that only the manufacturer, or one of its
approved representatives, is able to ensure. This maintenance
work relates to the following:
■ Replacement of a major component (compressor, evaporator).
■ Operations on the refrigerating circuit (handling refrigerant).
■ Modication of factory-set parameters (change of application).
■ Movement or disassembly of the refrigeration unit.
■ Any operation due to proven lack of maintenance.
■ Any operation covered by the warranty.
To reduce waste, the refrigerant and the oil must be transferred
in accordance with applicable regulations, using methods that limit
refrigerant leaks and with materials that are suitable for the
products.
Any leak detected must be repaired immediately.
The compressor oil that is recovered during maintenance contains
refrigerant and must be treated accordingly.
Pressurised refrigerant must not be vented to the open air.
If the refrigerant circuit is opened for a period of up to one day,
cap all openings. If open for longer, blanket the circuit with nitrogen.
10.4 - Tightening torques
10.4.1 - Tightening torques for the main fastenings
Screw type Use
Value
(N.m)
Metal screw
D = 4,8mm
Condenser modules, fan protection
grilles, panels
4,2
Metal screw D = 6,3 Plastic impeller 4,2
M8 H screw Condenser modules, impeller mounting 18
Taptite M10 screw
Condenser modules, chassis,
structure, economizer assembly,
electrical panels, compressor and oil
separator mounting
30
Taptite M6 screw Pipe supports, condenser modules 7
M8 H screw MCHE coil 14
M6 H screw Pipe clip 10
M8 H nut Oil separator mounting 14
M16 H stud Compressor mounting 30
M10 H screw Oil separator mounting 30
M16 H lock nut Compressor mounting 23
M8 H screw Filter unit cover 35
M12 H screw Economiser-compressor ange 40
M16 H stud and nut Discharge- oil separator ange 130
M8 H screw Oil line-compressor ange 25
M16 H screw Exchanger water boxes 190
5/8 ORFS nut Oil line 65
M12/M16 H nut
Victaulic 4" (M12 nut), and 5" (M16
nut) clamps on suction line
65
M16 H screw Evaporator on chassis 130
Rotalock
1"3/4-12-UN
Liquid line 100
Rotalock
2"1/4-12-UN
Liquid line 145
M20 H nut Victaulic 5 and 6" clamp on water pipe 45
M6 T30 torx screw Control cabinet casing panel 4,5
10.4.2 - Tightening torques for the main electrical
connections
Component
Designation
in the unit
Value
(N.m)
Customer connections
M10 screw-nut on phases L1/L2/L3 49
M12 screw-nut on earth strip PE 49
Main disconnect switch without option 70D
Circuit breaker - all calibers QS100 62,5
Main disconnect switch with option 70D
Circuit breaker - caliber 630/800A QF100 9
Circuit breaker - caliber 1000A QF100 18
Compressor variable frequency drive
M10 nuts on phases GS* 29,5
M10 or M8 nut on earth R/S/T U/V/W 29,5
M8 nuts on internal connections (fuses and
busbars)
GND 14,5
Earth strip connections
M8 24
M10 49
Compressor connections
M12 nuts on phases EC* 23
M12 screw on ground 1/2/3 25
Variable frequency drives for the fans and
hydraulic pumps
Screws on phases and earth, VFD up to 11kW GS* 2,5
Screws on phases and earth, VFD up to 15kW GS* 4,5
Circuit breaker cage terminal and
di󰀨erential block screws
Schneider type GV2 QM* 1,7
Schneider type IC60 QF100A 2
ABB type S803S QF* 3,5
ABB type MS132 QM10* 1,3
Switch cage terminal screws
Schneider LC1K0610B7 AC3 6A K* 1,3
Schneider LC1SKGC200B7 AC3 5A K* 0,8
ABB type AS09 K* 1,2
Potential transformer TC* 0,6
Control cabinet distributor 13
WARNING: If the compressor’s motor is with permanent
magnet (option 329), do not open the compressor. Ensure
thattheterminalboxissecurelyxedinplacebeforelling
the machine with refrigerant, draining the refrigerant or
rotating the motor shaft. The compressor cannot be removed.
WARNING: Strong magnetic eld inside the compressor
casing. An electrical current may be generated on the
compressor terminals and on the circuits which are connected
whenlling/emptyingtherefrigerant.
WARNING: The tightening of the connections at the
compressor terminals requires special precautions. Refer to
the next section.
10 - SYSTEM STANDARD MAINTENANCE
57