Nederman 920/1500, Installation And Service Manual

Trolley Return Unit 920/1500

EN

20

Cable W9 to W16

Cable W9 to W16 is not included in the suction trolley return. EKK or EKLK is a suitable 

cable that is recommended. See Appendix A, Cable connections overview (coloured 

boxes).
Cables W9, W10 and W16 are control cables, low voltage 

installation 5 VDC. Connect cables W9, W10 and W16 according 

to Appendix B, ‘Circuit diagram 2’ , ‘Circuit diagram 3’ or 

‘Circuit diagram 4’ depending on the chosen configuration.

Cable W11 is a low-voltage installation 24 VAC. The cable routing of W11 can be 

complex depending on the location of the damper. If you use a cable with a maximum 

outer diameter of 7.4 mm, it is possible to route it in the aluminium profile’s vacant slot 

(equivalent slot as W2 is routed in). One suggestion is to use Ölflex/Ryflex 7G 0.75 

mm2 that fits precisely inside the extraction channel slot. Connect cable according to 

Appendix B ‘Circuit diagram 5’.
Cable W12 is a control cable, which is connected to Fan Starter 

or Fan Inverter. Connect cable according to Appendix B, 

‘Circuit diagram 5’, ‘Circuit diagram 6’ ‘Circuit diagram 7’ or ‘Circuit diagram 8’  

depending on the choosen configuration.

Before connecting cable W13, W14 and W15, go to 

Section ‘5.4 Electrical continuous test (2 persons required)’ and perform an  

electrical continuous test.  

Cables W13 to W15 with the associated power components constitute a power current 

installation. Power components are fan, working switches and starting devices for the fan. 

A qualified electrician must perform the installation and the connection to the network. 

Green-marked components and pink marked cables are included in the suction trolley 

return and are installed by Nederman’s electricians.
Blue-marked components, and yellow-marked cables are not included in the suction 

trolley return and are installed by a local qualified electrician.

Orange-marked cables are installed by the installation team. These cables are not included 

in the suction trolley return.

Table 5-2: Cable table

Cable

Circuit diagram

Type

W9, W10, W16

2, 3, 4.

5 V DC Control cable to Control Box. 5 V DC Control 

cable to Control Box.

W11

5, 6, 7, 8

24 V DC Control cable to Damper.

W12

5, 6, 7, 8

24 V DC Control cable to Fan Starter or Fan Inverter.

W13

1, 10

Mains power cable to Drive unit and Safety switch.

W14, W15

See Fan Starter or Fan Inverter 

documentation. See also Section 

9.2 Cable connections overview.

Mains power cable to Safety switch and Fan Starter 

or Fan Inverter.

5.4 

Electrical continuous test (2 persons required)

Before you power up the system it is recommended to do an electrical wiring test to 

control if the wiring is done according to the electrical drawings.
You need a Voltage multimeter with buzz test.
Make sure that the Trolley Return System’s power supply is off.