Helvar
| Data is subject to change without notice.
www.helvar.com
www.helvar.com
Helvar 458Mx Chassis: Installation Guide
2
3
WARNING:
4. Remove knockouts as required.
With the blanking plate(s) removed, the chassis is ready for a module
to be attached (see diagram on page 3).
5. If you are attaching a module, unscrew and remove the blanking
plate(s).
Note:
–
458M1: 1 blanking plate
–
458M2: 2 blanking plates
–
458M3: 3 blanking plates
Note 1: The diagrams on this page show the 458M1/4S10 Chassis.
Covers and knockouts are removed from the 458M2 and 458M3 in a similar way.
Note 2: Use the grommets provided to protect cabling entering the knockouts.
If necessary, the knockout gland plates (on 458M2 and 458M3 types) can be removed to provide more
space for cabling.
2. Mount to Wall
Mounting, Environmental and Clearance Requirements
Mounting
• Mount the chassis vertically on a flat surface.
• Use No. 8 or No. 10 screws with a head diameter between 6 mm and 9 mm.
• Use wall plugs if necessary.
• Mount chassis on wall using:
– 4 screws for the 458M1 and 458M2 chassis
– 6 screws for the 458M3 chassis
Environment
• The ambient temperature must be between 0 ºC and +40 ºC.
• Air humidity must be between 0 % and 90 % (noncondensing).
• The area must be adequately ventilated.
• Do NOT install this product in a damp location.
Clearance
• Make sure that enough space is left for ventilation and for attaching module(s): at least 5 cm above,
below and to the right of the chassis, and 10 cm to the left. See ‘Mounting Dimensions and Clearance’ on
page 4.
• Leave sufficient clearance to allow cables and trunking to be connected.
• When a Helvar module (e.g. a dimmer unit) is attached, the grilles must NOT be obstructed.
Heat sink
Grilles
Module grilles and heat sink
1. Remove Cover, Knockouts (and Blanking Plates)
Procedure
1. Open the door and remove the screws (
A
and
B
) from the
inside door.
2. Remove the screws that are located to the left of the door (
C
and
D
)
Note:
–
458M1: 2 screws (
C
and
D
)
–
458M2: 3 screws
–
458M3: 4 screws
3. Remove the cover from the chassis.
Blanking
plate
Knockouts
Knockouts
THE BLANKING PLATE(S) PREVENT(S) ACCESS TO MAINS WIRING WHEN THERE
IS NO MODULE CONNECTED.
DO NOT REMOVE THE BLANKING PLATE(S) UNLESS YOU ARE ATTACHING A
MODULE.
A
C
B
D
