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Installation Manual
5.0 ELECTRICAL INSTALLATION
Isolation - Before commencing work, make sure that the unit and
Nuaire control are electrically isolated from the mains supply.
Because the run and start currents depend upon the duty and
associated ductwork of an individual unit, run currents will be
exceeded if the unit is operated with its cover removed. It is therefore
recommended that the unit is not run for prolonged periods in this
condition.
5.1 Unit Details
Unit details including Full Load Current, Voltage, fan speed etc. can be
found on the unit label.
5.2 Wiring Diagrams
The wiring illustrations below are for units without control. All wiring
is terminated in junction boxes fitted to the side of the unit. Local
isolator (by others)
Do not wire the power supply to motor via the motor alarm relay as
terminals are only closed after the motor is energized.
The alarm relay on condensate may require the use of a contactor if the
host equipment supply is switched.
5.2.1 AVT1-3-(R/X)
12
Wiring - AVT1-3-(R/X)
Key:
Pre-Wired Connection
Factory Connection
Optional External Connection
Mandatory External Connection
A1 : Rotary Isolating Switch (Supplied by Customer.)
A3 : Close to Open IO Damper (Supplied by Customer.)
W1 : Supply Fan Alarm (Open = Alarm)
W2 : Twin Fan Alarm (Open = Alarm)
Main Supply
Connection
Neutral
Live 1
Live 2
Live 3
A1
5.2.2 AVT4-8-(R/X)
13
Wiring - AVT4-8-(R/X)
Key:
Pre-Wired Connection
Factory Connection
Optional External Connection
Mandatory External Connection
A1 : Rotary Isolating Switch (Supplied by Customer.)
A3 : Close to Open IO Damper (Supplied by Customer.)
W1 : Supply Fan Alarm (Open = Alarm)
W2 : Twin Fan Alarm (Open = Alarm)
Main Supply
Connection
Neutral
Live 1
Live 2
Live 3
A1
Nuaire | Western Industrial Estate | Caerphilly | CF83 1NA | nuaire.co.uk
A1
08
09
10
11
12
13
14
Earth Block
IO Damper
Supply Fan Power
A3
A1
08
09
10
11
12
13
14
IO Damper
Supply Fan Power
Earth Block
A3
AVT-NC-(R/X)
A2
B1
B2
C3
C2
15
16
17
18
19
20
21
22
23
24
Twin Fan Power
Supply Fan Control
Supply &
Supply Air flow
Twin Fan
Alarm.
Control
(<1V Return is Fault)
A2
B1
B2
A4
15
16
17
18
19
20
21
22
23
Supply Fan Control
Twin Fan Power
Supply &
Supply Fan
Twin Fan
Alarm.
Control
(Open = Fault.)
05. 04. 22. Document Number 671590
C1
D3
D2
D1
25
26
27
28
Twin Fan Air
Flow Alarm
Twin Fan Air flow
Alarm.
(<1V Return is Fault)
A3
B4
B3
W1
W2
24
25
26
27
28
Twin Fan Alarm
Twin Fan
Alarm.
(Open = Fault.)
6
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