Vent-Axia MULTIVENT MV250 181510A Installation And Wiring Instructions - page 3
3.
WIRING
ISOLATE MAINS SUPPLY BEFORE COMMENCING WIRING
Access to the MULTIVENT connection terminals is under the top cover which is retained by four screws. Ensure that the mains
supply voltage, frequency, number of phases and power rating comply with the details on the rating label positioned under the top
cover.
WARNING: THIS APPLIANCE MUST BE EARTHED
All wiring must be in accordance with local and/or national electrical codes as applicable or the appropriate standard in your
country (BS7671 in the UK). The MULTIVENT must be supplied through a double-pole isolating switch, having a contact separa-
tion of not less than 3mm. Cable clamps are provided for use with the cable or flex on entry into the MULTIVENT.
The MULTIVENT has three speed settings. Select the required speed and wire as indicated in Figure 3.
Alternatively the MULTIVENT may be wired in a number of different ways to achieve optimum ventilation control. Figure 4 shows
a wiring diagram to provide 3-speeds selectable by a remote switch. Figure 5 shows a wiring diagram for automatic switching from
medium to high speed on rise of humidity utilising a Vent-Axia Ambient Response Humidity Sensor, part number 563550.
4.
OVER-HEATING PROTECTION
The fan motor is fitted with standard Thermal Overload Protection. This will automatically switch the fan off in the event of a fault
condition. If this occurs isolate the fan, check for and remove any obstruction, leave for a short time for the motor to cool before
reconnecting. If this recurs, isolate and call a service engineer.