Level 3 Maintenance; Tightening Of The Electrical Connections; Tightening Torques For The Main Fastenings - Carrier 30RBM 160 Installation, Operation And Maintenance Instructions

Refrigerant circuit checks:
• The unit is subject to F-gas tight regulatory checks.
Please refer to the table in the introduction.
• Check the unit operating parameters and compare them
with the previous values,
• Check the operation of the high pressure switches.
Replace as necessary,
• Check the fouling of the filter drier. Replace it if necessary,
• Keep an up-to-date service booklet specific to the
refrigeration unit in question.
Ensure all adequate safety measures are taken for all
these operations: use appropriate PPE (personal
protective equipment), comply with all industry and
local regulations, use common sense.

13.3 - Level 3 maintenance

Maintenance at this level requires specific skills, qualifications,
tools and expertise. Only the manufacturer, his representative
or authorised agent are permitted to carry out this work.
This maintenance work relates to the following:
• Replacement of major components (compressor, water
heat exchanger),
• Operations on the refrigerant circuit (handling refrigerant),
• Modification 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,
• One or two leak detection operations per year performed
by qualified personnel using a certified leak detector.
• To reduce waste, the refrigerant and the oil must be
transferred in accordance with applicable regulations,
using methods that limit refrigerant leaks and pressure
drops and with materials that are suitable for the products.
• Any detected leaks must be repaired immediately
• The compressor oil that is recovered during maintenance
contains refrigerant and must be treated accordingly.
• Refrigerant under pressure must not be vented to the
open air.
• If the refrigerating circuit must be opened, cap all
openings for a period of up to one day. If open for longer,
blanket the circuit with a dry, inert gas (e.g. nitrogen).
62

13.4 - Tightening of the electrical connections

Component
Welded screw PE, customer connection
Screw terminal, fuse holder
Screw terminal, fuse holder
Screw terminal, compressor contactor
Brass screw M6, compressor ground
M6 screw, compressor connection
Screw terminal, circuit breakers
Screw terminal, pump contactor
M8 screw customer connection (size 160-220)
M10 screw customer connection (size 260-400)
M12 screw customer connection (size 430-520)
Screw terminal, circuit breakers (size 160-400)
Screw terminal, circuit breakers (size 430-520)
Screw terminal, fuse holder 32A (opt231)
Screw terminal, fuse holder 100A (opt231)

13.5 - Tightening torques for the main fastenings

Screw type Use
Metal screw D=4.8 Condensing module, Casing, Supports
Taptite M10 screw Air coil sub-assembly, chassis-structure, electrical
box fixing, plate heat exchanger and pump
Taptite M6 screw Pipe supports, enclosure, variable frequency drive
supports
Oil equalisation Oil equalisation line
screw
H M6 screw Pipe clip
H M10 nut Compressor chassis, Compressor fixing
Designation in the Value
unit (N.m)
- 40
FU1, FU2, FU3, FU4 10
FU100 0.8-1.2
KM1-->KM12 3-4.5
EC- 5
EC- 5
QM- 2
KM90 - KM90A 2,5
QS100 15 to 22
QS100 30 to 44
QS100 50 to 75
QF100 3.2-3.7
QF100 8-10
Fu- 2,5
Fu- 3.5 - 4
Value
(N.m)
4,2
30
7
145
10
30