VES Andover Ltd Eagle Close Chandlers Ford Ind. Est Eastleigh Hampshire SO53 4NF
Tel: 08448 15 60 60 Fax: 02380 261204 E-mail: vesltd@ves.co.uk Web: www.ves.co.uk
ecovent
NRG
Air Handling Units
Installation, Operation and Maintenance Manual
10
The electrical supply
must be fully isolated
before attempting to affect any work on this unit
All electrical connections to any unit must be carried out in accordance with the current
edition of the I.E.E Regulations and only competent Electricians should be allowed to affect
any electrical work to our units.
It is the customer’s responsibility to supply earth fault protection through the building
installation device and a dedicated, isolated power supply with overload protection, to
account for motor start up currents.
See the accompanying fan wiring diagram for specifi c fan details.
Do not connect any unit to an electrical supply voltage outside of the specifi cation.
The following wiring diagrams are a guide to installing the standard fan and actuator options
found on NRG units. If in any doubt, or for special versions of the units, consult the wiring
diagram in your document pack or contact our customer services department on
08448 15 60 60
, quoting the sales order (SO) number and unit type as found on the unit
name plate.
For Three Phase Fans, a trial connection of the three phase supply should be made to check
that the fan rotates in the correct direction as indicated on the fan. If the rotation is incorrect,
interchange any two phases of the incoming supply at the terminal block.
For incorrect rotation of single phase fans, check with the VES Service department for advice,
on
08448 15 60 60
.
Pre-wired units supplied in sections may require reconnection of numbered wires to
either the isolator/control panel or, in the case of multiple sections, a local terminal box.
For further information regarding fi tted controls, please see the accompanying controls O&M.
Standard Wiring
& Fan Installation
Standard Wiring
Damper actuator
wiring arrangement
Fig.
5
Important
Important
Warning
Warning
Warning
NM230A/NM24A Damper Actuator
To isolate from the main power supply, the system must incorporate a device which disconnects
all the phase conductors
230V 1PH 50Hz
(24V 1PH 50Hz)
1 2 3
N
L1
(-)
(+)
BLUE
BROWN
WHITE
Direction of Rotation
Open/Close
Control
0
1
