User guide

3. Installation
496929 Page 11
Wiring the Control Unit
Cable Entries
The control unit case back provides several cable entries. The back is
designed to stand away from the wall to leave space for cables.
Mains Connection
The control unit must be permanently connected to a 3A fused spur outlet
fitted with a readily accessible disconnect device. Connect the mains supply
to the control unit using the 3-way terminal block located in the control unit
back. Secure the mains cable to the case anchor point using the cable tie
provided. Note that the control unit has a T-250mA internal mains fuse. All
electrical connections should be carried out by a qualified electrician and must
comply with the current IEE Wiring Regulations: 16 Edition, Appendix 5 -
Standard Circuit Arrangement.
To Control Panel
Transformer
L
N
T 250mA 250V
230V ~50Hz 200mA
Figure 5. Mains Connection
Connect the 21VAC lead from the mains transformer to the main pcb. See
Figures 3 for the location of the 21VAC connector.
Caution: Do not apply mains power at this point. Do not work inside the
control unit case when mains power is present.