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Electrical Installation
24
Electrical Supply – FTC4 Circuit Board
All electrical work should be carried out by a suitably qualified electrician. Failure to comply with this could lead to
electrocution, fire, or death. It will also invalidate the product warranty. All wiring should be according to national
wiring regulations.
If FTC4 and outdoor units have separate power supplies (prefered option), the following MUST be carried out:
• FTC4 unit electrical box connector connections changed (see below diagram)
• Outdoor unit DIP switch settings changed to SW8-3 ON
• Turn on the outdoor unit before the FTC4.
Cable Specifications – FTC4 Circuit Board
The below table gives an indication of the cable specifications required for FTC-4 connections, final specification
will always be the liability of the electrical technician and must be in accordance with national wiring regulations.
FTC4 power supply
FTC4 input capacity breaker *
Number of Cores x Size (mm2)
Circuit Rating
*1.
A breaker with at least 3.0 mm contact separation in each pole shall be provided. Use earth leakage breaker
(NV). The breaker shall be provided to ensure disconnection of all active phase conductors of the supply.
*2.
Max. 120 m
*3.
The values given in the table above are not always measured against the ground value.
FTC4
(MASTER)
FTC4
(MASTER)
Cable Specifications
1
FTC4 power supply
FTC4 power supply (earth)
FTC4 – outdoor unit *
FTC4 master L – N *
FTC4 – outdoor unit (S2 – S3) *
*If powering FTC4 from Ecodan
via S1, it must be
®
stated on the FTC4 - "Warning 2 points of isolation"
230V 50Hz
16A
2 x min 1.5
1 x min 1.5
2
2 x min 0.3
AC230V
3
DC24V
3
FTC4 Installation Manual
37
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