![background image](http://html1.mh-extra.com/html/carrier/30wg-020/30wg-020_installation-operation-and-maintenance-instructions_2560463030.webp)
30
The calculations are based on the maximum machine current
(see electrical data tables). For the design the following
standardised installation methods are used, in accordance
with IEC 60364, table 52C:
•
For units installed inside the building:
No.13: perforated horizontal cable conduit, and No. 41:
closed conduit.
The calculation is based on PVC or XLPE insulated cables
with copper or aluminium core. A maximum ambient
temperature of 40 °C has been taken into account. The given
wire length limits the voltage drop to < 5%.
IMPORTANT: Before connection of the main power cables
(L1 - L2 - L3) on the terminal block, it is imperative to
check the correct order of the 3 phases before proceeding to
the connection on then terminal block or the main disconnect/
isolator switch.
6.4.2 - On-site control wiring
Selection of minimum and maximum wire sections for connection to 61WG units
61WG
Max.
connectable
section*
Calculation favourable case: Suspended aerial lines
(standardised routing No. 17)
PVC insulated cable
Calculation unfavourable case: Conductors in conduits or multi-
conductor cables in closed conduit (standardised routing No. 41)
PVC insulated cable, if possible
Section
Section**
Max. length for
voltage drop <5%
Cable type
Section**
Max. length for voltage
drop <5%
Cable type***
mm² (per phase) mm² (per phase)
m
mm² (per phase)
m
020
1 x 35
1 x 2.5
60
PVC Cu
1 x 4
100
PVC Cu
025
1 x 35
1 x 2.5
60
PVC Cu
1 x 4
100
PVC Cu
030
1 x 35
1 x 4
80
PVC Cu
1 x 6
120
PVC Cu
035
1 x 35
1 x 4
80
PVC Cu
1 x 6
120
PVC Cu
040
1 x 35
1 x 6
100
PVC Cu
1 x 10
150
PVC Cu
045
1 x 35
1 x 6
100
PVC Cu
1 x 10
150
PVC Cu
050
1 x 35
1 x 10
120
PVC Cu
1 x 16
180
PVC Cu
060
1 x 35
1 x 10
120
PVC Cu
1 x 16
180
PVC Cu
070
1 x 35
1 x 16
140
PVC Cu
1 x 25
205
PVC Cu
080
1 x 35
1 x 16
140
PVC Cu
1 x 25
205
PVC Cu
090
1 x 35
1 x 25
170
PVC Cu
1 x 35
225
PVC Cu
Selection of minimum and maximum wire sections for connection to 30WG/30WGA units
30WG
30WGA
Max.
connectable
section*
Calculation favourable case: Suspended aerial lines
(standardised routing No. 17)
PVC insulated cable
Calculation unfavourable case: Conductors in conduits or multi-
conductor cables in closed conduit (standardised routing No. 41)
PVC insulated cable, if possible
Section
Section**
Max. length for
voltage drop <5%
Cable type
Section**
Max. length for voltage drop
<5%
Cable typee***
mm² (per phase) mm² (per phase) m
mm² (par phase)
m
020
1 x 35
1 x 2,5
60
PVC Cu
1 x 4
100
PVC Cu
025
1 x 35
1 x 2,5
60
PVC Cu
1 x 4
100
PVC Cu
030
1 x 35
1 x 4
80
PVC Cu
1 x 6
120
PVC Cu
035
1 x 35
1 x 4
80
PVC Cu
1 x 6
120
PVC Cu
040
1 x 35
1 x 4
80
PVC Cu
1 x 6
120
PVC Cu
045
1 x 35
1 x 6
100
PVC Cu
1 x 10
150
PVC Cu
050
1 x 35
1 x 10
120
PVC Cu
1 x 16
180
PVC Cu
060
1 x 35
1 x 10
120
PVC Cu
1 x 16
180
PVC Cu
070
1 x 35
1 x 16
140
PVC Cu
1 x 16
180
PVC Cu
080
1 x 35
1 x 16
140
PVC Cu
1 x 25
205
PVC Cu
090
1 x 35
1 x 16
140
PVC Cu
1 x 25
225
PVC Cu
*
Connection capacities actually available for each machine, defined according to the connection terminal size, the control box access opening size and the available
space inside the control box.
** Selection simultation result considering the hypothesis indicated.
*** If the maximum calculated section is for an XLPE cable type, this means that a selection based on a PVC cable type can exceed the connection capacity actually
available. Special attention must be given to the selection.
Note:
The currents considered are given for a machine equipped with a hydronic kit operating at maximum current.
6.4.1 - 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 61WG/30WG/30WGA Pro- Controls
IOM and the certified wiring diagram supplied with the unit
for the field control wiring of the following features:
•
Remote on/off switch
•
Remote heat/cool switch
•
Demand limit external switch 1
•
Remote dual set point
•
Alarm report
•
Pump control - unit without hydronic module.
•
Relief boiler or electric heater
•
Valve control - see description of options 153 and 154 in the
61WG/30WG/30WGA Pro- controls manual
Summary of Contents for 30WG 020
Page 55: ...55 ...