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1) Yes, you are correct, it does appear that the installation instructions were geared towards a European install. The electrical installation instructions are not written very well, that's for sure.
2) The electrical spec's are as follows:
- Supply power - 110 V +- 10% (USA & Canada)
- Power frequency - 50Hz/60Hz
- Control voltage - 12 V
- Limit power - 3KW
- Light voltage - 12 V
- Fan Voltage - 12 V
- Radio output power - 5 W
To confirm the required amperage, apply Watts Law where P = I x E, P = Watts, I= amperage and E = volts, 3000W = I x 120 Volts = 25 amps.
The calculated 25 amps is identical to the FAQ electrical portion.
3) The FAQ's also mention to use an RCD which is the European equivalent to our GFCI. RCD = Residual Current Device. GFCI = Ground Fault Circuit Interrupter.
4) Therefore, you will require a 30 amp single pole GFCI circuit breaker. This type of breaker is not very common and is not sold at Home Depot or Lowe's. You will most likely need to order this type of breaker from your local electrical supply store. Provide the electrical store with the manufacturer of your main electrical panel to determine compatibility.
Refer to the link below for an example picture of a 30 amp GFCI Single Pole breaker:
5) For a means of disconnect, I would recommend to wire the unit using a 30 amp Single Pole ON/OFF switch as shown in the link below:
Same as the GFCI breaker, you will not find a 30 amp Single Pole Single Throw ON/OFF switch at your local Home Depot or Lowe's. You will need to purchase this switch through your local electrical supply store.
6) Since the breaker will be a 30 amp device, you can use 10/2 Romex with a ground. The white neutral from the Romex will land on the neutral screw terminal at the breaker. The curled white pigtail neutral wire on the breaker will land on your main neutral bus bar. The black hot wire from the 10/2 Romex will land on the breaker. The unit will require a dedicated 30 amp, 120 volt circuit from your main electrical panel.
6A) The white neutral wire from the 10/2 Romex will splice into the blue wire on the unit. The black hot wire from the 10/2 Romex will splice into the brown wire on the unit. The bare copper ground wire from your 10/2 Romex will splice onto the unit's yellow ground wire.
7) The black hot wire originating from the GFCI breaker will land on the bottom screw terminal of the 30 amp switch. You will run another 10/2 Romex with ground out of the switch and connect this to the top switch screw terminal. This will be your switched loop connection. The black Romex wire (switched loop) will connect to the unit's brown wire. At the wall switch box, splice the 2 white neutral wires together and do not connect these to the switch. Only the hot feed and the hot switched loop land on the switch.
8) Suggest installing the 30 Amp SPST switch in a deep 4" x 4" metal wall box using a 1/2" single gang plaster ring. Install the SPST wall switch inside the bathroom area, possibly near your existing lighting, fan switches?
Let me know if you are OK with these instructions. Reply back to me with any questions.
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