fans and speed controllers

[Marvo]

On my fans and controllers they had 2 x extra connections, labelled TK on controller and TB on fan, both were for thermal cut out!

I stand corrected - not seen that. I guess the reset is in the controller then? What make of fan?

TK is standard for thermal cutout (thermistor). The TK terminals are designed to be connected to the control side of the DOL starter. They're NOT designed to have the motor run current going through them. Systemair is one European company that uses this system and possibly from memory EBM Papst on their external rotor motor range of fans.

 

[sjm]

TK is standard for thermal cutout (thermistor). The TK terminals are designed to be connected to the control side of the DOL starter. They're NOT designed to have the motor run current going through them. Systemair is one European company that uses this system and possibly from memory EBM Papst on their external rotor motor range of fans.

It was a systemair controller. Live,neutral and earth to live, neutral and earth of fan. 2 x TK terminals on controller which I connected to the only other 2 connections at the fan marked TB. Is this not correct?
The guys working for the firm that supplied the system and were doing the associated ducting said that was the way to do it.

 

[davelerave]

i wired a few Sp fans lately with electronic speed control

3-core to fan and thermal overload integral to fan

electronic speed control has to be reset in event of overload

some fan's will have overload wired into external control cct

 

[sjm]

The boss of company that supplied the fans drew a simple wiring diagram which showed 5 cores from controller to fan, 2 marked TK.

 

[davelerave]

ya-not much to it anyhow

manuals are always useful

 

[Marvo]

Systemair have a CDRom catalogue which has a fan selection program on it called Systemair SP.exe. In the program they give you wiring drawngs for every fan they make as well as specs for currents, voltages, cap sizes etc etc. I'm not sure if it's available on their website but any Systemair agent should give you a copy for free if you ask them. Same goes for Ziehl, Elta, Woods, Howden Donkin, Vent Axia and EBM Papst.

 

[Sparky_Ben]

okay got two more of these fans too wire up with speed controllers and another 2 later in the week, these are the connections,

from Z on controller to P on Fan
from U on controller to U on Fan
and UZ on controller to K on Fan

What colour cores would you normally use in this situation, Also which would be your live and neutral had one this week where the site electrician had wired a 4 core cable from the speed controller up to a 4 pole rotary isolator in the loft, and to feed the fan from this used only the brown and blue cores as live and neutral leaving out the black and grey, cant understand why this was done.

Hope this is clear if not just ask me i wana get this sorted properly we have different views at work,

 

[Marvo]

You'll get a more accurate answer if you give the make and model number of the fan and the speed controller.

 

[Sparky_Ben]

flaktwoods fan and speed controller

 

[Sparky_Ben]

single phase

 

[Poorle]

Does anyone know what i can do in this situation.. Got 2 ceiling fans (commercial fans, not extractor) to put up and the supply cable is 1.5 T&E- these types of fans need max 3A fused isolator normally-all i have is a 1 gang 1 way switch which i think was supposed to switch fans on / off. These fans have a 4 wire control unit with them and i obviously only have the T&E.

I think i know the answer... New supply for fans but that will cause some major damage to the fresh plaster.. ?

 

[Richard Burns]

Does anyone know what i can do in this situation.. Got 2 ceiling fans (commercial fans, not extractor) to put up and the supply cable is 1.5 T&E- these types of fans need max 3A fused isolator normally-all i have is a 1 gang 1 way switch which i think was supposed to switch fans on / off. These fans have a 4 wire control unit with them and i obviously only have the T&E.

I think i know the answer... New supply for fans but that will cause some major damage to the fresh plaster.. ?

What does the "4 wire control unit" require? Would need more information to give a useful answer.
If it is permanent line, switched line, neutral and earth then presumably there is a timer or other function; this would not be usable but change the switch for an SFCU, and you have an on off fan, done. (probably would have been better to start a new post!)