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11.4 - Recommended wire sections
Wire sizing is the responsibility of the installer, and depends
on the characteristics and regulations applicable to each
installation site. The following is only to be used as a guide-
line, and does not make Carrier in any way liable. After
wire sizing has been completed, using the certified dimen-
sional drawing, the installer must ensure easy connection
and define any modifications necessary on site.
The connections provided as standard for the field-supplied
power entry cables to the general disconnect/isolator switch
are designed for the number and type of wires, listed in the
table below.
The calculations are based on the maximum machine cur-
rent (see electrical data tables), and standard installation
practises, in accordance with IEC 60364, table 52C have
been applied (30RQS units are installed outside):
•
No. 17: suspended aerial lines,
•
No. 61: buried conduit with a derating coefficient of 20.
The calculation is based on PVC or XLPE insulated cables
with copper core. A maximum ambient temperature of
46°C has been taken into consideration. The given wire
length limits the voltage drop to < 5% (length L in metres
- see table below).
ImpOrTANT: Before connection of the main power
cables (L1 - L2 - L3) on the terminal block, it is impera-
tive to check the correct order of the 3 phases before
pro-ceeding to the connection on the main disconnect/
isolator switch.
power cable entry
The power cables can enter the control box from below or
from the side of the unit, at the bottom of the angle iron.
Pre-punched holes facilitate the entry. Refer to the certified
dimensional drawing for the unit. A removable aluminium
plate below the control box allows introduction of the cables.
Minimum and maximum connectable wire sections (per phase) for 30RQS units
30RQS/
RQSY
Disconnect switch
Connectable wire
Max. connection capacity Minimum calculated section
Maximum calculated section
Section, mm²
Section, mm²
Max. length, m
Wire type
Section, mm²
Max. length, m
Wire type
039
1 x 95
1 x 16
165
XLPE Cu
1 x 25
300
PVC Cu
045
1 x 95
1 x 16
165
XLPE Cu
1 x 25
300
PVC Cu
050
1 x 95
1 x 16
165
XLPE Cu
1 x 25
300
PVC Cu
060
1 x 95
1 x 25
210
XLPE Cu
1 x 35
305
PVC Cu
070
1 x 95
1 x 35
220
XLPE Cu
1 x 50
350
PVC Cu
078
1 x 95
1 x 35
220
XLPE Cu
1 x 70
380
PVC Cu
080
1 x 95
1 x 35
220
XLPE Cu
1 x 70
380
PVC Cu
090
1 x 95
1 x 35
220
XLPE Cu
1 x 70
380
PVC Cu
100
1 x 95
1 x 70
280
XLPE Cu
1 x 95
410
PVC Cu
120
1 x 95
1 x 70
280
XLPE Cu
1 x 95
410
PVC Cu
140
1 x 185
1 x 95
305
XLPE Cu
1 x 185
465
PVC Cu
160
1 x 185
1 x 120
320
XLPE Cu
1 x 185
465
PVC Cu
Note:
Power supply cable section (see the wiring diagrams supplied with the unit)
11.5 - field control wiring
IMPORTANT
: field connection of interface circuits may
lead to safety risks: any control box modification must
maintain equipment conformity with local regulations.
Precautions must be taken to prevent accidental electrical
contact between circuits supplied by different sources:
•
The routing selection and/or conductor insulation
characteristics must ensure dual electric insulation.
•
In case of accidental disconnection, conductor fixing
between different conductors and/or in the control
box prevents any contact between the conductor ends
and an active energised part.
Refer to the 30RB/30RQ 017-160 Pro- Controls
IOM and the certified wiring diagram supplied with the
unit for the field control wiring of the following features:
•
Water heat exchanger pump interlock (mandatory)
•
Remote on/off switch
•
Demand limit external switch
•
Remote dual set point
•
Alarm, alert and operation report
•
Heating/cooling selection
11.6 - power supply
ATTENTION: After the unit has been commissioned, the
power supply must only be disconnected for quick main-
tenance operations (one day maximum). for longer main-
tenance operations or when the unit is taken out of service
and stored (e.g. during the winter or if the unit does not
need to generate cooling) the power supply must be main-
tained to ensure supply to the heaters (compressor oil
crankcase heaters, unit frost protection).
After all possible options have been connected, the trans-
former ensures the availability of a usable 24 VA or 1 A
power reserve for the control circuit on site.
Содержание 30RQ 039 Series
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