4
nuaire.co.uk
029 2085 8400
30. 04. 19. Leaflet Number 671220
Installation and Maintenance
AXUS Circular Long Cased Axial Flow Fans
Sections 4.3, 4.4 & 5
are applicable to
Ecosmart Control option only.
4.3 Electrical Wiring - Ecosmart Control
The mains power supply to the controller must be appropriately sized
and installed via a local isolation switch (by others). The isolator must
also accommodate the 230V switched live (if used).
The mains supply from the Ecosmart controller to the fan must be
appropriately sized, not exceeding 30 metres and must be a screened
power cable, earthed at both ends. A four point gland plate is formed
from the base of the control and in order to maintain EMC compliance,
an EMC glanding kit is supplied.
Ecosmart controls and sensors are supplied with 10 metres of data
cable plugged at both ends, if used these can now be fitted and plugged
in to the low voltage sockets on the Ecosmart control board.
All other
low voltage connections i.e. BMS can also be completed.
N
L
SL
Remove this link wire if:
1. a switched live signal is connected.
2. A ES-PIR, ES-TC or BMS signal
is connected.
Max SL run on
Min
Trickle
Test
1
0
Pwr
Standby
Fan 1
Fan 2
Heating
Cooling
Fault
Frost
Tx
Rx
Ecosmart
Earth
DAMPER
FAULT RUN
E
L3
N
L2
L1
E N L1 L2 L3
Mains supply connections
400V 50Hz 3ph + Neutral
via local isolator
1 3
5
2
4
6
(U)
(V) (W)
CONTACTER
A1
A2
0V
0-10V
BMS signal
'NET' connection
U V W E
DP
CL
Connections to fan via screened
power cable. Purpose made glands
are provided to earth the screening
N
RET
Note: Internal connections
between the supply
terminals, output
contactors the PCB and
inverter are made at
the factory
IMPORTANT
Motors of 4kW and
above must be
connected to Delta
IMPORTANT
The screening of the power cable must be continuous. Bridge any breaks (e.g. at local isolators)
using braided earthing cable. Ensure the screening is earthed at both ends.
IMPORTANT
To minimise the possibility of Electro Magnetic
Interference:
• Always install screened cable between the control
and the fan, maximum length 30 metres. Please consult
Nuaire if a longer cable run is needed.
• This product must be earthed and always ‘earth’ the
screened cable at both ends. Ensure that ALL earth
connections are the same potential. Cable glands are
provided.
• Always keep mains supply cables and motor supply
cables separate and DO NOT install any data cable or
low voltage cable in the same containment as mains
carrying cables.
Figure 5. Resilient Mounting ‘Suspended’ fixing.
