Mud-club

Vehicle & Technical => Range Rover => Topic started by: blacknight on July 11, 2006, 16:45:07

Title: Kenlowe Fan Switching
Post by: blacknight on July 11, 2006, 16:45:07

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

Title: Kenlowe Fan Switching
Post by: mark.yellow.series.3 on July 11, 2006, 19:18:34

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.

Title: Kenlowe Fan Switching
Post by: gtomo2 on July 11, 2006, 19:25:21

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.

Title: Kenlowe Fan Switching
Post by: wizard on July 12, 2006, 14:22:33

This might help

(http://www.wizardbilt.com/electric%20cooling%20fan%20circ%203.GIF)

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.

(http://www.wizardbilt.com/electric%20cooling%20fan%20circ%202.GIF)


This one is a thermostat only option.

(http://www.wizardbilt.com/electric%20cooling%20fan%20circ%201.GIF)


Regards
wizard :twisted:

Title: Kenlowe Fan Switching
Post by: Hightower on July 12, 2006, 15:19:43

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

Title: Kenlowe Fan Switching
Post by: wizard on July 12, 2006, 16:49:47

It does help with mrs wizard being a draughsperson !!

regards
wizard :twisted:

Title: Kenlowe Fan Switching
Post by: blacknight on July 24, 2006, 21:54:12

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.