20
5.6 - 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 30XAV-ZE Touch Pilot control manual and the
certified electric wiring diagram provided with the unit for
the field control wiring of the following features:
•
Remote on/off switch
•
Demand limit external switch
•
Remote dual set point
•
Alarm, alert and signals
•
Evaporator pump control
•
Heat reclaim condenser pump control (option)
•
Set point reset via outside air temperature sensor
•
Various interlocks on the Energy Management Module
(EMM) board.
table of minimum and maximum wire sections (per phase) for connection to 30XaV-Ze units
30XaV-ZE- Max.
connectable
section*
calculation favourable case:
calculation unfavourable case:
- suspended aerial lines (standardised routing no. 17)
- XlPE insulated cable
- 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
401
2x240
1x185
260
XLPE
2x185
450
PVC
501
2x240
1x240
280
XLPE
2x240
480
PVC
551
2x240
1x240
250
XLPE
2x185
350
XLPE
651
2x240/2x240
1x150/1x150
260
XLPE
2x185/2x185
550
PVC
701
2x240 / 2x240
1 x 240 / 1 x 150
240
XLPE
2 x 185 / 2 x 120 380
XLPE
851
2x240 / 2x240
1 x 240 / 1 x 240
240
XLPE
2 x 185 / 2 x 185 410
XLPE
901
2x240 / 2x240
2 x 120 / 2 x 120
260
XLPE
2 x2 40 / 2x 240 450
XLPE
option 81
651 to 901 4 x 240
* 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.
Connections to the client communication bus
•
The connection to the CCN bus is carried out using
connectors provided for this purpose inside the
control box. Two connectors are provided to allow
both permanent and service connections.
•
Permanent connections to an Ethernet bus or to a
USB port are made via the connectors on the touch
screen interface.
A shielding clamp for the cable from the system is
provided near the permanent bus connectors.
5.7 - Electric and power reserve for the user
After all possible options have been connected, the TC
transformer ensures a power supply reserve of 1 A under
24 Vac that can be used for the on-site control cabling.
As an option, a second TC transformer powers a 230V,
50Hz circuit can be used for charging a laptop battery
(maximum current 0.8 A). A standard CEE7/17, type E
connector is provided. This circuit is protected by a 10mA
earth leakage detector.
