MCI9 Heater Blower to fast

[poohbear]

Is it possable to run the blower off 12 volts to slow down the bus heater blower .
It is going to fast and blowing to much air on 24 volts . i have modified and installed new duct work going to back of bus but almost blows the registers off when i turn it on .am going to install Hydronic heater in series with original heater.
                                                       Thanks Richard

[Nick Badame Refrig/ACC]

Hi Richard,

I think you are talking about the OTR blower so, your answer is yes but, reducing down to 12v with such a big motor

will end up drawing much more amps then at 24v. There maybe some members that have come up with an alternative.

Good Luck
Nick-

[Kwajdiver]

Nick is of course correct about the 24vdc motor.   I believe you would have to replace the motor with perhaps a smaller 12vdc motor.   You wouldn't want a very large DC motor, or you would be draining your batteries.   If this is for OTR use, you should be able to install a speed control switch on the 24v motor you now have. That would be the way to go.  I know the 9's have just a high and low.

Bill
Tampa Bay

[pipes]

http://www.survivalunlimited.com/powercontrols-dc.htm

Will this do the job ?

http://www.zaneinc.com/user/Ds-am2-l.pdf

[Kwajdiver]

I believe one of those should work.  Only thing is,,,,, I don't know what the 24vdc motor is rated for in the way of amps.  I'm not at my bus or I would look.

Find out what the motor is rated for, purchase a 24DC Control accordingly.

Should be a switch in the side panel next to the driver that's not being used.  Would see if it would mount there.

Bill
Tampa Bay

[poohbear]

 as far as i can tell there is a number 4 or number 2 wire going to this motor so i think it is drawing more than 11 amps these controls go up too.
                                                       Thanks Richard

[skipn]

When I got around to it I was just going to remove every other fin in the squirrel cage.

FWIW

Skip

[Hartley]

Ok, Here is one other Idea that seems to be lost on most
motorheads....

It's a large D.C. Motor and can be rated from 70 to 140 amps.

Guys,

Golf Carts and electric carts are D.C. operated from 24 to 48 volts.
Most golf carts are 36 volts.

If you can get a surplus resistor bank like from an old ez-go or other
golf cart you can rig up a speed controller from that.

Or if you are lucky enough to find one of the electronic controller modules
for a later model golf cart ei: ez-go, club car or yamaha you can set up a fully
speed controllable heater speed system with a couple of switches and a potentiometer that you can mount on the dash.

Then you can get from 0 to WARP drive with a single simple control.

Just make sure the computer box gets lots of cool air past it for best
performance.

Dave....

[skipn]

Dave,
    Glad to see you are feeling better

   Thanks for the info sorry but this motorhead always carried my clubs......no nothin about carts.
   That is why the more the better........minds that is

    Would that effect the dampening resistor?

   Thanks
Skip

[Len Silva]

Nick,
I must respectfully disagree with you. Running a 24 volt motor on 12 volts will reduce the current and the speed to about half.  The motor will not be quite as efficient as at it's design voltage, but should work OK.

Len