Voltmaster D-Series Bedienungsanleitung PDF herunterladen (Seite 2)

VMD111/1 Installation Instructions and Technical Specification. Page 2 of 3

Installation design

Before work is undertaken, the installation should be designed and

a wiring plan prepared for the load wiring (see Load Wiring Design*).

It should give VoltMaster positions, outlet numbers, cable lengths

and sizes and voltage sensing point: see Sensing Connection.

NB. If installing in a cupboard provide ventilation to avoid

overheating. Do not mount unit on a vertical surface with the

transformer below secondary outlets.

Installation should be carried out by a suitably qualified person in

accordance with good electrical practice and the appropriate

national and local wiring regulations.

Fitting cable clamps or conduit: Remove appropriate knock-outs

in the end plates before installation to enable the fitting of the

cable clamps/glands or conduit. The cover must be earthed:

check and, if necessary, reinstate the earthing connection before

applying power. NB. Cables and clamps not provided.

Mains supply connection

VoltMaster must be connected to a clean unaltered mains supply

and should not be connected to the output of mains dimmers.

Switch off mains electrical supply before commencing installation.

Feed mains supply cable through cable clamp and connect wires

into respective terminals in terminal block (J: Fig.1). VoltMaster

must be earthed. To ensure the mains cable does not touch the

transformer, do not have too much excess cable inside VoltMaster.

Mains fusing: VoltMaster is protected by a (F) HRC fuse. This is

not a customer-replaceable fuse and should not blow in normal

circumstances. If it does, contact Multiload.

Output connection

Total loading

The unit will control any load from 35W up to a total maximum

equal to the unit rating: 300W for the VMD300/12 and

VMDE300/12 and 400W for the VMD400/12 and VMD400/24.

Overall outlet to track, high wire or distribution box

Lamps up to the total max unit rating may be connected to the

track, high wire or distribution box. Track is connected to the large

terminal block (H:Fig.1, Q:Fig 2) – which accept up to 10mm

cable.

Standard multi-outlet to individual light fittings

Lamps are individually wired back to the individual terminal pairs

(A:Fig.1). Each individual terminal pair will accept a single cable of

up to 4mm

. Thicker cable or multiple cables could be terminated

into suitable pin or blade crimps or junction box to facilitate

connection to the terminal pair.

The connection to individual terminal pairs on either side of the

large green terminal should be balanced as equally as possible: in

any case no more than 225W on any one side.

Cable connection

Feed the necessary cables to the luminaire(s) through the cable

clamps if used. Securely connect cable(s) to appropriate terminal

pairs (A/H:Fig.1). Tighten the cable clamps.

Output fusing

VoltMaster is supplied fitted with Quick Acting (Ceramic) F10A

fuses (max 75W per terminal pair) (K:Fig.1).

Fuse replacement

The unit will accept 1

/4 x 1

/4 size ‘0’ or 20mm x 5mm fuses.

1 Ensure mains supply is switched off.

2 When removing fuse do not over-stress or deform clip contacts.

3 Ensure fuse caps and clip contacts are clean (avoid handling).

4 Locate fuse centrally in contacts before inserting.

See Load Wiring Design: VMDLW300 series for details of

voltage sensing point. Available from the‘technical guides’ at

www.multiload.co.uk or by

contacting Multiload.

Dimming Connection

Control by signalling system (0-10V or 1-10V)

The analogue signal is connected to the terminals (N:Fig.1) C1 = 0V

(negative) and C4 = signal (positive): maximum cable size 2.5mm

In line with the industry standard, VoltMaster requires sink current

capability from the control system. VoltMaster reverts to full

brightness on signal disconnection.

Control by digital signalling (DSI or DALI)

The digital signal is connected to the input terminals on the DSI or

DALI interface situated within the unit.

Manual control

VoltMaster can be controlled by any Multiload RPS3 rotary control

module, which connects to terminals C1, C2 and C3 (N:Fig.1).

Maximum cable size 2.5mm

. Several VoltMasters may be

connected to a single module.

Sensing connection

It is imperative that the sensing cable (L:Fig.1) is connected on

installation. Failure to connect this cable will cause the unit to

deliver a reduced fixed secondary voltage to the luminaires.

Connect cable (L:Fig.1) into voltage sensing terminals (B) and other

end to the voltage sensing point. The sensing cable carries 11.8V

(23.6V) RMS and hardly any current.

For multi-outlet, we recommend the sensing cable should be a min

of 1mm

(min 10A rating) and its exact length is unimportant.

When the sensing cable is connected to a track, or similar, fed from

the large terminals (H:Fig.1 or Q:Fig.2) we recommend sensing

cables should be minimum 2.5mm

. Thinner cable can be used if

suitably protected at the ‘voltage sensing point’*.

VoltMaster functions

Short circuit protection

Single outlet to track, high-wire system or distribution box (Q:Fig.2).

If a short circuit occurs on the output circuit VoltMaster will shut

down to almost zero voltage; monitor output circuit continuously;

restart 10-15 seconds after the short has been corrected.

Each individual terminal pair (A:Fig1) is protected by a 10A (F) fuse.

If a short circuit occurs on one of the outlets, either the fuse will

blow immediately or VoltMaster will shut down for 10-15 secs and

then restart, blowing the fuse in the process which allows the

remaining outlets to resume operation.

Overload protection

If unit is overloaded it will shut down for approx 15 secs, and then

gradually ramp the lamps up towards the set brightness. If the

overload persists this cycle will be repeated until the overload is

removed – when normal operation will be automatically resumed.

Fault Diagnosis

Output showing approx 7V (14V) RMS (reduced brightness):

check that sensing connection is made.

Lamps receiving more than 11.8V (23.6V)RMS: check that

sensing cable is connected to correct voltage sensing point.

Lamps look off: 1. Check mains supply to unit. 2. Check for output

short circuit: disconnect output connections in turn, until at some

point lamps should relight. Remove short circuit on relevant load

before reconnection. If lamps do not light at all, contact Multiload.

Lamps at very dim level (dimming units only): check dimming

signal: disconnect all connections to C1 C2 C3 C4 – if sensing

cable is still connected then lamps should show full brightness –

reconnect correct dimming signal.

Lamps continually tripping off and slowly ramping up after approx

15 ses: check for overload: check lamp wattages and number of

lamps connected.

Multiload Technology Limited 2 Rosemont Road Hampstead London NW3 6NE Telephone 020 7794 9152 www.multiload.co.uk

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