Go Back   Horizons Unlimited - The HUBB > 4 wheels > 4WD Overland Tech

4WD Overland Tech GENERIC 4WD / 4 wheel TECH discussions and info that is valid for ALL brands. See brand specific forums.
Contact Overland Solutions for all your custom modifications and setup for overland travel.

Visit Matt Savage for VIAIR compressors, Air Lift Helper Springs, Tyre Levers, Chris Scott's Books & DVDs, KC Daylighters, Allisport Intercoolers, Overland Preparation and lots more!

Reply
 
LinkBack Thread Tools Display Modes
  #1  
Old 15 Feb 2011
Contributing Member
Veteran HUBBer
 
Join Date: Aug 2004
Location: GENT Belgium
Posts: 508
Webasto installation advice...

Hello guys,

I’m a bit ahead of myself, I’ve just brought a 24v Webasto air / air heater, I don’t yet know the model number. I’m wondering is there anything I should consider with its installation / positioning ? I plan on installing it under the rear bed area, where I have easy access to the rear body air vent.

Now I can convert it to 12v but been told this is expensive, as I have 2 batteries I presume I can use the 24v or should I look to use a step up from 12v to 24v….

Any advise on the subject very welcome, needless to say its second hand and cheap… the car is a HJ75

Cheers
Matt
Reply With Quote
  #2  
Old 15 Feb 2011
Registered Users
Veteran HUBBer
 
Join Date: Jun 2007
Location: Anchorage, Alaska
Posts: 244
OK, your vehicle has 2 batteries. Are they in series or parallel? IOW, is it 12V or 24V? It is unclear from your post. If you don't know, you should have found out before deciding what kind of Webasto to buy.
Assuming the car is 12V, use a 12V-24V convertor on a switch so it isn't constantly working. Make sure it has lots of surplus capacity.
You may not have gotten much of a bargain buying an electrical device of incorrect voltage.

Charlie
__________________
Unimog U500 w/Unicat
Reply With Quote
  #3  
Old 15 Feb 2011
Contributing Member
Veteran HUBBer
 
Join Date: Apr 2001
Location: Leicestershire,UK, or in my Iveco Daily 4x4
Posts: 461
You've got the exhaust and air intake to worry about too, otherwise they sound like a 747 engine i

And make sure the 12 - 24v converter has a high enough rating

Toyota has a habit of putting 2 batteries in a 12 volt truck (caused no end of probs with my folks hiace camper) , you cannot take 24 volts off those batteries
__________________
Rich

Iveco Turbo Daily 4x4 40-10
Ex Owner LR101 300Tdi Ambi 'Tiggurr'
Reply With Quote
  #4  
Old 16 Feb 2011
Registered Users
Veteran HUBBer
 
Join Date: May 2006
Location: Bribie Island Australia
Posts: 576
Using the vehicle cranking batteries for running heaters/fridges is a recipe for stuck in the middle of nowhere without a crank in sight.

Ideally you should have 24V (2 x 12V) leisure batteries with sufficient capacity to run the heater for however long you think you'll need it to run. Size your leisure batteries to suit the Amp Hours being drawn by the heater (and lights/fridge/etc). realistically you need to start at batteries with a minimum rating of 80Amp Hours - that gives you about 40AH to use before damaging the batteries. There is a simple way to recharge the 2 x12V batteries but requires two or maybe three relays - a weblookup might be better for diagrams - I think the SBMCC website has some schematics.

I'd put the heater as far away from the sleeping area as possible, the exhaust and intake as well, run the heater flex hoses to the places you want the outlets at floor level and near to bed and shower cubicle (see I'm a sook) are a good start. You can wrap insulation around the flex hoses if they have to be run under the floor for any length. I'd put the controller at hand or foot reach to turn on/off. Use the timer as much as possible.

Cab footwells are good spots for the air intake, if you are taking warmish air into the heater it takes less to heat it up and the heater will cycle on/off using less battery power. You should have a permanently open bottom vent to allow fresh air to circulate.

Exhaust has to be away from intake, windows or vents - if you must put the exhaust under a window make sure you fit an interlock switch so that the heater turns off the moment the window opens. You can buy smallish diameter steel flex hose joined to steel pipe and run the exhaust well away.

You need a permanently open roof vent (for gas cookers and fridges as well) in case the heater leaks CO into the flex hoses.
Reply With Quote
  #5  
Old 16 Feb 2011
Registered Users
Veteran HUBBer
 
Join Date: Feb 2005
Location: Netherlands
Posts: 465
installation instructions

He Matt,

Your quite busy A google search gives this Webasto installation manual. Your type may be in the list but the principles are all the same. I have one installed in my LC on 24 V but mine is 24V. your HJ is 12V so you need a step up converter but that is indeed a big one as the start-up power of the unit is considerable.

Download

cheers,
Noel
Reply With Quote
  #6  
Old 16 Feb 2011
Registered Users
Veteran HUBBer
 
Join Date: Apr 2001
Location: London (UK)
Posts: 772
Matt

In addition to what the others have said (your installation is 12V, only the starter motor is 24V; using starter batteries for running camping equipment is asking for trouble), please mind that by using a step-up
converter you only increase the load on these batteries (converters are NOT 100% efficient).

While an extra deep cyle battery (or two) is always a good idea, the rest of your project looks like a non-starter, because 12V and 24V loads do not mix well on one bank of 12V batteries. Even if you fitted two extra batteries, you still should not not use just one to power 12V loads while both are connected in series to produce 24V.

IMHO, the only way to save your heater project is by adding a large capacity deep cycle battery (wired through a split charger) and a properly rated, high efficiency step-up converter.
__________________
Roman (UK)
www.overlandcruiser.com
Reply With Quote
  #7  
Old 16 Feb 2011
Registered Users
Veteran HUBBer
 
Join Date: Jun 2007
Location: Anchorage, Alaska
Posts: 244
Well, goodwoodweirdo, roman seems to know more about your vehicle than you do; you haven't answered my question as to the voltage of your vehicle.
Actually, HJ75s come in different battery/voltage configurations for different markets.
IF your vehicle is as described by him, I agree 100% with his suggestion: get a deep cycle leisure battery and a HD 12V-24V convertor.
Additionally: the electronic installation of a Webasto is not trivial. Likewise, the proper installation of air intake and exhaust is critical. Do you have the necessary technical skills?

Charlie
__________________
Unimog U500 w/Unicat
Reply With Quote
  #8  
Old 17 Feb 2011
Registered Users
Veteran HUBBer
 
Join Date: Aug 2006
Location: christchurch uk
Posts: 249
Sell it

I would not think it is worth the trouble of a converter as others have said it needs to be massive they draw at least 20 amps at start up. I would sell it and buy a 12v one. probably cheaper in the long run.

Graeme
Reply With Quote
  #9  
Old 18 Feb 2011
Contributing Member
Veteran HUBBer
 
Join Date: Aug 2004
Location: GENT Belgium
Posts: 508
Hi Guys,

Thanks for the feedback and sorry for the late reply, yep got side tracked with work.... Indeed I should have been clearer in my initial post.

So it’s a 1988 HJ75 12v electrics...(not a 24v starter) there is a second 12v Deep Cycle battery for the accessories…it was all converted when new by Trakka back in the 80’s. I will need to further research the split charging system that’s installed.

I’ll take on board your comments and let you know of the outcome. Don’t hold your breath though… could take some time.

Cheers
Matt
Reply With Quote
  #10  
Old 25 Mar 2011
mailking's Avatar
Registered Users
Veteran HUBBer
 
Join Date: Mar 2008
Location: travelling
Posts: 184
I second the selling and buying a 12v version.
__________________
--------------------------------------------------
- On the road since 2003 in an antique Land Cruiser
Reply With Quote
  #11  
Old 6 Apr 2011
Registered Users
Veteran HUBBer
 
Join Date: Jan 2011
Location: Yorkshire
Posts: 102
I put a Airtop2000ST 12V in my defender. Easy to fit and wire up. IF you do decide to sell it and get another i'd consider one that makes hot water so you can use it for a shower.

BTW the support from Webasto is crap. I hope you got it from a dealer who can help or is it from Turkey?
__________________
www.overlandbirds.com
1 Male, 1 Female, 1 Landrover, UK Passports (2 each), UK Carnet
Reply With Quote
  #12  
Old 7 Apr 2011
Contributing Member
Veteran HUBBer
 
Join Date: Aug 2004
Location: GENT Belgium
Posts: 508
its second hand, but to be honest... fitting it is rather low on the list of " todo's "

I'll get back to it, later in the year...

First I need Brussels to give me a number plate ..

Cheers
Matt


Quote:
Originally Posted by neill.bird View Post
I put a Airtop2000ST 12V in my defender. Easy to fit and wire up. IF you do decide to sell it and get another i'd consider one that makes hot water so you can use it for a shower.

BTW the support from Webasto is crap. I hope you got it from a dealer who can help or is it from Turkey?
Reply With Quote
  #13  
Old 9 Apr 2011
mailking's Avatar
Registered Users
Veteran HUBBer
 
Join Date: Mar 2008
Location: travelling
Posts: 184
Quote:
Originally Posted by neill.bird View Post
BTW the support from Webasto is crap. I hope you got it from a dealer who can help or is it from Turkey?
Funny you say so, but the Webasto guys in Turkey fixed our diesel heater temporarily but made a lot of shortcuts, no way to figure out the color coded wires anymore....

Adventurous greetings,
Coen
__________________
--------------------------------------------------
- On the road since 2003 in an antique Land Cruiser
Reply With Quote
Reply


Currently Active Users Viewing This Thread: 1 (0 Registered Users and/or Members and 1 guests)
 
Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On


Similar Threads
Thread Thread Starter Forum Replies Last Post
Eberspacher vs WEBASTO mcagol 4WD Overland Tech 6 5 Aug 2010 11:21
High Altitude heating Webasto/Eberspacher Phil Flanagan 4WD Overland Tech 2 6 Apr 2010 23:38
Waterproofing a heater (Webasto / Eberspacher) 2cvfred 4WD Overland Tech 1 18 Feb 2010 13:01
webasto heater 1 hour timer removal graysworld 4WD Overland Tech 0 26 Sep 2009 21:10
WEBASTO and ENGEL-FRIDGE wanted ! karellevrau 4WD Overland Tech 0 23 Dec 2002 18:42

 
 


HU DVD Summer Special!

Now that summer is here, get On the Road! Take 30% off the Achievable Dream - On the Road! 2-DVD set until August 31 only. Get On the Road! Learn the tips to staying healthy, happy and secure on your motorcycle adventure!

Our veteran travellers share their tips (and great stories) for staying healthy, happy and secure on your motorcycle adventure.

"A fantastic, informative and inspirational DVD."

"It's brilliant - thank you very much!"

Check it out at the HU Store! Remember to use Coupon Code 'ONTHEROAD' on your order when you checkout.


Renedian Adventures


Renedian Adventures

What others say about HU...

"I just wanted to say thanks for doing this and sharing so much with the rest of us." Dave, USA

"Your website is a mecca of valuable information and the DVD series is informative, entertaining, and inspiring! The new look of the website is very impressive, updated and catchy. Thank you so very much!" Jennifer, Canada

"...Great site. Keep up the good work." Murray and Carmen, Australia

"We just finished a 7 month 22,000+ mile scouting trip from Alaska to the bottom of Chile and I can't tell you how many times we referred to your site for help. From how to adjust your valves, to where to stay in the back country of Peru. Horizons Unlimited was a key player in our success. Motorcycle enthusiasts from around the world are in debt to your services." Alaska Riders

contest pic

10th Annual HU Travellers Photo Contest is on now! This is an opportunity for YOU to show us your best photos and win prizes!

NEW! HU 2014 Adventure Travel T-shirts! are now available in several colors! Be the first kid on your block to have them! New lower prices on synths!

HU 2014 T-shirts now in!

Check out the new Gildan Performance cotton-feel t-shirt - 100% poly, feels like soft cotton!


What turns you on to motorcycle travel?


Global Rescue, WORLDwide evacuation services for EVERYONE

Global Rescue is the premier provider of medical, security and evacuation services worldwide and is the only company that will come to you, wherever you are, and evacuate you to your home hospital of choice. Additionally, Global Rescue places no restrictions on country of citizenship - all nationalities are eligible to sign-up!


New to Horizons Unlimited?

New to motorcycle travelling? New to the HU site? Confused? Too many options? It's really very simple - just 4 easy steps!

Horizons Unlimited was founded in 1997 by Grant and Susan Johnson following their journey around the world on a BMW R80 G/S motorcycle.

Susan and Grant Johnson Read more about Grant & Susan's story

Membership - help keep us going!

Horizons Unlimited is not a big multi-national company, just two people who love motorcycle travel and have grown what started as a hobby in 1997 into a full time job (usually 8-10 hours per day and 7 days a week) and a labour of love. To keep it going and a roof over our heads, we run events (22 this year!); we sell inspirational and informative DVDs; we have a few selected advertisers; and we make a small amount from memberships.

You don't have to be a Member to come to an HU meeting, access the website, the HUBB or to receive the e-zine. What you get for your membership contribution is our sincere gratitude, good karma and knowing that you're helping to keep the motorcycle travel dream alive. Contributing Members and Gold Members do get additional features on the HUBB. Here's a list of all the Member benefits on the HUBB.


Books & DVDs

amazon

All the best travel books and videos listed and often reviewed on HU's famous Books page. Check it out and get great travel books from all over the world.


Motorcycle Express for shipping and insurance!

Motorcycle Express

MC Air Shipping, (uncrated) USA / Canada / Europe and other areas. Be sure to say "Horizons Unlimited" to get your $25 discount on Shipping!
Insurance - see: For foreigners traveling in US and Canada and for Americans and Canadians traveling in other countries, then mail it to MC Express and get your HU $15 discount!




All times are GMT +1. The time now is 18:59.