AZBMW.org
Toggle Content Welcome Guest! Please Register or Login Mon December 18, 2017, 3:09 am
Toggle Content Main Menu

Toggle Content Recent Posts
Last 10 Forum Messages

WTB Momo or mtech steering wheel 4 E30
Last post by frontin40 in Classifieds/Wanted on Nov 21, 2017 at 22:08:51

This forum is DEAD!
Last post by laplana325i in General Discussion on Oct 03, 2017 at 22:17:25

Selling VW GTI 1997
Last post by bmw325i in Other Models on Oct 01, 2017 at 00:46:51

FS: E30 back seat SOLD
Last post by meeceboy78 in Classifieds/Wanted on Sep 26, 2017 at 06:19:48

E46 track car manual coupe
Last post by Drift30 in Classifieds/Wanted on Sep 02, 2017 at 20:12:46

E85 where can I get it
Last post by JimsR in General Discussion on Aug 09, 2017 at 22:14:12

FS: E46 M3 KW 2-Way Adjustable Clubsport Coilovers...
Last post by bullfrog in Classifieds/Wanted on Jul 21, 2017 at 00:34:29

wtb: open 3.25, 3.46, 3.73 diff
Last post by bullfrog in Classifieds/Wanted on Jul 21, 2017 at 00:33:57

Looking for an E36 M3 - 5 speed
Last post by ambition in General Discussion on Jul 02, 2017 at 02:50:51

WTB BMW E21 back seat
Last post by meeceboy78 in Classifieds/Wanted on Jun 12, 2017 at 19:50:33


AZBMW Forums › Model Specific Discussion › 5-8 Series › E28 AC question
E28 AC question
All things 5, 6, 7 and 8 series
Post new topic    Reply to topic    Printer Friendly Page     Forum Index ›  5-8 Series

View previous topic :: View next topic  
Author Message
uter
Newbie
Newbie

Offline Offline
Joined: Apr 06, 2009
Posts: 89
Location: Scottsdale
PostPosted: Tue Aug 30, 2011 11:03 pm
Post subject: E28 AC question

Noob question: what's the best configuration for maximum AC output? Is it the one I have pictured?

When I had an E28 in the humid south, I recall being warned that condensation could freeze and reduce the efficiency of the unit.

Any suggestions?

Thanks
Back to top
View user's profile Visit poster's website
boastless
Cone Killer
Cone Killer

Offline Offline
Joined: Jun 03, 2008
Posts: 423

PostPosted: Tue Aug 30, 2011 11:09 pm
Post subject: Re: E28 AC question

Let me know when you figure it out. I usually go with all three knobs to the right.
Back to top
View user's profile
uter
Newbie
Newbie

Offline Offline
Joined: Apr 06, 2009
Posts: 89
Location: Scottsdale
PostPosted: Wed Aug 31, 2011 1:56 am
Post subject: Re: E28 AC question

boast less wrote:
... I usually go with all three knobs to the right.

But then, isn't the car constantly trying to cool [114 degree] outside air?
Back to top
View user's profile Visit poster's website
wkohler
Hoard5r

Offline Offline
Joined: Nov 13, 2008
Posts: 3330
Location: Central Phoenix
PostPosted: Wed Aug 31, 2011 2:27 am
Post subject: Re: E28 AC question

Everything to the left.

I never keep my floor or defroster vents open. Cool air does not come from those. Only heat. Heat also does not come out of the dash vents that face you..

Later cars (9/85-) have a servo-controlled fresh air flap. They did this because Americans were too damn stupid to figure it out. So, they removed the functionality you have with your dash-top center vent (all of the parts are still there in the late car except the thumbwheel and the vent itself has a blank) and made it so the fresh-air flaps automatically closed when the AC button was pressed. All of this controlled by the HVAC control unit (looks like a relay, but costs $300).

You need as much air volume as you can get with the E28 AC setup, so close off all of the stuff you don't need, and I'd highly suggest closing off the far right vent if you're the only one in the car.

Here's a diagram that shows how the HVAC air flows:

_________________
7/75 E12 530i | 7/80 E12 M535i | 2/85 E28 Alpina B7 Turbo | 3/85 E28 528i | 2/87 E28 M535i | 8/94 E34 525iT
10/80 E12 M535i | 12/82 E28 533i | 4/83 E28 533i | 3/85 E23 745i | 6/85 E28 M535i | 7/86 E28 535is | 5/94 E34 525iT
Back to top
View user's profile Visit poster's website AIM Address
uter
Newbie
Newbie

Offline Offline
Joined: Apr 06, 2009
Posts: 89
Location: Scottsdale
PostPosted: Wed Aug 31, 2011 3:46 am
Post subject: Re: E28 AC question

Thanks, Chris. I honestly am going to print this and carry in the car.

_________________
1990 325ic
1995 840Ci
2014 i3
2016 X5 40e
Back to top
View user's profile Visit poster's website
Display posts from previous:   
Post new topic    Reply to topic    Printer Friendly Page    Forum Index ›  5-8 Series
Page 1 of 1
All times are GMT - 7 Hours



Jump to:  


You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot vote in polls in this forum
You cannot attach files in this forum
You cannot download files in this forum


This Theme Ported By: WebSiteGuru Designs. Original Author: Lorkan Themes