Carrier 30RB-170R, Installation, Operation And Maintenance Instructions

Page: 84 / 92

IMPORTANT: Ensure all adequate safety measures are taken
for all these operations: use appropriate PPE (personal
protective equipment), comply with all applicable industry
and local regulations, and 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 type
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 leaks 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 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).
13.4 - Tightening the electrical connections
Component Description
Value
(N.m)
Welded screw PE, customer connection 30
Power supply fuse holder cage screw
terminal
FU - FUA - FUB 0,5 … 0,8
Power supply circuit breaker cage screw
terminal
QF, QF1 2
Circuit breaker cage screw terminal
option 284
QFA 2
Socket cage screw terminal option 284 PC 1,2
Compressor cage screw terminal, fuse
holder
FU1 --> FU8 3,5
Compressor contactor cage screw terminal
Size 170 to 550 - Check
KM1-->KM8 1,7
Compressor contactor cage screw terminal
Size 170 to 550 - Power
KM1-->KM8 5
Compressor circuit breakers cage screw
terminal Size 610 to 950
QM1-->QM8 5
Compressor contactor cage screw terminal
Size 610 to 950 - Check
KM1-->KM8 1,2
Compressor contactor cage screw terminal
Size 610 to 950 - Power
KM1-->KM8 9
Screw terminal, fan circuit breakers QM11-->QM62 High 1,7 /
Low 1,3
Variable drive cage screw terminal 1.5 kW,
2.2 kW, 4 kW
GS11 --> GS22 1,3
Variable drive cage screw terminal 7.5 kW,
11 kW
GS11 --> GS22 2,5
Variable drive cage screw terminal 15 kW,
18 kW
GS11 --> GS22 4,5
M6 screw, customer connection
(30RB-RBP and 30RQ-RQP ≤ 170R)
QS101 8
M8 screw, customer connection
(180R ≤ 30RB-RBP and
30RQ-RQP ≤ 270R)
QS101 15
M10 screw, customer connection
(310R ≤ 30RQ-RQP ≤ 520R)
QS101 50
M10 screw, customer connection
(310R ≤ 30RB-RBP ≤ 720R)
QS101 50
M12 screw, customer connection
(from 30RB-RBP770R to 30RB-RBP950R)
QS101 75
13.5 - Tightening torques for the main
fastenings
Screw type Use
Value
(N.m)
Metal screw D=4.8 Condensing module, casing, supports 4,2
Metal screw D = 6.3 Plastic impeller 4,2
Taptite M10 screw
Condensing module, casing-structure,
electrical box fixing, plate heat
exchanger and pump
30
Taptite M6 screw Mounting pipes, enclosure 7
Oil equalisation
screw
Oil equalisation line 145
M6 hex screw Pipe clip 10
M10 H nut
Compressor chassis,
Compressor fixing
30
13.6 - Air-cooled exchanger
We recommend that coils are inspected regularly to check the
degree of fouling. This depends on the environment where the
unit is installed, in particular urban and industrial sites, and for
units installed near trees that shed their leaves.
Recommendations for maintenance and cleaning of air-cooled
exchangers:
-Regularly cleaning the coil surface is essential for correct
unit operation.
-Eliminating contamination and removal of harmful residue
will increase the operating life of the coils and the unit.
-The maintenance and cleaning procedures below are part of
the regular maintenance to increase the operating life of coils.
- Specific recommendation in case of snow: for long term
storage, regularly check that no snow has accumulated on
the coil.
Specific data for RB and RBP fitted with MCHE:
-Clean the surface of the coil by spraying the coil regularly
and uniformly from bottom to top, orienting the water jet at
right angles to the surface. Do not exceed a water pressure
of 6200 kPa (62 bar) or an angle of 45° in relation to the coil.
The nozzle must be at least 300 mm away from the coil
surface.
- Clean and scrub the entire connection with a flexible Nylon,
PolyPro
®
or Tynex
®
brush and low-pressure tap water.
Level 1 cleaning:
-Remove all foreign objects or debris attached to the surface of the
coil or wedged between the casing and the supports
- For RQ and RQP fitted with RTPF coils, scrub vertically and gently
using a brush.
-Use a low pressure dry air jet to remove all traces of dust
from the coil.
Level 2 cleaning:
-Carry out the level 1 cleaning operations.
-Clean the coil, using appropriate products.
Use appropriate PPE including safety glasses and/or mask,
waterproof clothes and safety gloves. It is recommended to
wear clothing that covers the whole body.
Specific products approved by the manufacturer for cleaning
coils are available from the manufacturer's spare parts
network. The use of any other product is strictly prohibited.
After the cleaning product is applied, rinsing with water is
mandatory (see manufacturer's standard RW01-25).
13 - STANDARD MAINTENANCE
84