Kenlowe Fan Switching

[blacknight]

I have a Range Rover 3.9 V8 which has dual Kenlowe fans fitted to it.

What i'm wanting to do is put a manually operated switch in so that when wading I can make sure that the fans aren't running as so not to shower the engine bay with water.

They are thermostatically controlled, which is adjusted by turning a dial which at the moment it it set at "N". It has the settings "C"--"N"--"H" which I presume are "Cold"--"Normal"--"Hot".

When the engine is switched off I can also hear the fan/fans running.

Is it just a simple matter of fitting a switch in the feed to the Kenlowe Thermostat Control Dial.

Does anybody have a circuit diagram for this set-up, even a hand drawn on will do.

Thanks

[mark.yellow.series.3]

yep, a switch to cut the power to the feed, but just check the current draw, and buy a big enough switch to cope with it, or fit a relay.

[gtomo2]

and fit a warning light so you now the fans are off. Best bet is get a two postion relay (here are standerd on most 90 upwards classics) that way when you cut the power to the fan the relay drops them contacts and swops over to the conacts for the light.

[wizard]

This might help



Switch 1 is the "master" switch. With it off the fans wont come on !!

With sw 1 on and sw 2 off,  the fans are controlled by the setting on the thermostat.

With sw 1 on and sw 2 on the fans will run irrispective of the thermostat. untill sw 2 is switched off.

Under normal conditions sw 1 is normally on and sw 2 is off.


 This diagram is a thermostat switching a relay to run the fans.




This one is a thermostat only option.




Regards
wizard :twisted:

[Hightower]

Cool diagrams Wiz.  Takes me back to my old engineering days . . . . .

[wizard]

It does help with mrs wizard being a draughsperson !!

regards
wizard :twisted:

[blacknight]

Thanks for the replies.

All sorted now. Wired to a two way relay with a light that comes on to indicate that the fans are not running.