I'm in need of replacing the battery on my 412 and have the dilema of trying to get a large 80+ amp hour battery that is upto running an Eber and then starting the car during the winter or get a 60 amp hour one for the starting and day to day electrical demands of the car and then fitting a second battery on a split charge to run the Eber on those cold mornings to defrost it.
If I was to go the second battery route where does the Eber draw it's power from ie is there just one power supply to it that I can move to the second battery or is it a tad more complex than that? Knowing the Eber it is bound to be more involved with a multitude of connections supplying power to the various fans etc...in which case I'll stick to the single big battery
Where does the Eber draw power from?
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raygreenwood
- Posts: 11907
- Joined: Wed Jan 22, 2003 12:01 am
Re: Where does the Eber draw power from?
With the twin battery option there are a couple of ways to go about this.
(1) The Heater draws its power from the grid....not straight from the battery. The battery supplies that grid. When you switch to the second battery you are simply connecting that second battery in place of the first with a switch so nothing changes. This is the simplest method. It requires that YOU do the switching though. It means that when warming the car interior prior to starting in the morning, you switch your battery isolation switch to position 2.....and just run the heater. Then...after you finish your shower, dress and chain your wife the the stove for the day....you come out and switch the battery isolater back to position 1 and start the car.
The other method is to split the heaters power all the way away from the grid and run it directly to battery #2. I don't have my diagrams close by but if memory serves, the heater draws power from two places. One from the main fuse block and one hot lead going to the T-2 connector over by the starter. This is so that when you are starting and running the heater at the same time....there is no service interuption to the heater. Don't quote me on that until I see my diagrams. Ray
(1) The Heater draws its power from the grid....not straight from the battery. The battery supplies that grid. When you switch to the second battery you are simply connecting that second battery in place of the first with a switch so nothing changes. This is the simplest method. It requires that YOU do the switching though. It means that when warming the car interior prior to starting in the morning, you switch your battery isolation switch to position 2.....and just run the heater. Then...after you finish your shower, dress and chain your wife the the stove for the day....you come out and switch the battery isolater back to position 1 and start the car.
The other method is to split the heaters power all the way away from the grid and run it directly to battery #2. I don't have my diagrams close by but if memory serves, the heater draws power from two places. One from the main fuse block and one hot lead going to the T-2 connector over by the starter. This is so that when you are starting and running the heater at the same time....there is no service interuption to the heater. Don't quote me on that until I see my diagrams. Ray
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Lahti411
- Posts: 127
- Joined: Sat Jan 29, 2005 2:23 pm
Re: Where does the Eber draw power from?
I've collected some manuals for the Eber and zipped them to RAR file. So if anyone needs them here's a downloading link:
http://www.easy-share.com/1908295668/Eberspächer.rar
These manuals include wiring diagrams and trouble shooting guides and they explain the whole ecuipment quite thoroughly.
-Pirkka-
http://www.easy-share.com/1908295668/Eberspächer.rar
These manuals include wiring diagrams and trouble shooting guides and they explain the whole ecuipment quite thoroughly.
-Pirkka-
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Bill K.
- Posts: 563
- Joined: Mon Oct 27, 2003 10:50 pm
Re: Where does the Eber draw power from?
LOLraygreenwood wrote:. Then...after you finish your shower, dress and chain your wife to the stove for the day....you come out and switch the battery isolater back to position 1 and start the car.
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wshawn
- Posts: 209
- Joined: Thu Dec 27, 2007 6:36 am
Re: Where does the Eber draw power from?
raygreenwood wrote:With the twin battery option there are a couple of ways to go about this.
(1) The Heater draws its power from the grid....not straight from the battery. The battery supplies that grid. When you switch to the second battery you are simply connecting that second battery in place of the first with a switch so nothing changes. This is the simplest method. It requires that YOU do the switching though. It means that when warming the car interior prior to starting in the morning, you switch your battery isolation switch to position 2.....and just run the heater. Then...after you finish your shower, dress and chain your wife the the stove for the day....you come out and switch the battery isolater back to position 1 and start the car.
The other method is to split the heaters power all the way away from the grid and run it directly to battery #2. I don't have my diagrams close by but if memory serves, the heater draws power from two places. One from the main fuse block and one hot lead going to the T-2 connector over by the starter. This is so that when you are starting and running the heater at the same time....there is no service interuption to the heater. Don't quote me on that until I see my diagrams. Ray
I like the simplicity of option 1.
I'll have to look into that one regarding charging that battery, I'm assuming it must be possible to do that via a split charge relay/diode.
In the meaantime managed to pick up a 75 amp hour battery that was the same external dimensions of the old one.
I'll have to remind my wife that she should accept her position at home...then again she earns more than me so...
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raygreenwood
- Posts: 11907
- Joined: Wed Jan 22, 2003 12:01 am
Re: Where does the Eber draw power from?
Oh..sorry...I meant to get back to this. The Eber draws unswitched power from terminal 30 on the fuse block. That feeds the timer assembly switch in the dash (the green knob). It also draws switched power from the ignition switch....and as I noted.....also taps into terminal 30 on the starter at the T-2 split connector.
The object is this: the heater is only enabled when the ignition switch is on....and since the ignition switch bypasses power accessories when you have the key in start position....the connection to terminal 30 at the starter allows an already running heater to have no interuptions while starting.
The non-switched (constant) power from the fuse block to the heater timer in the dash is what allows you to feed power to the heater when the ignition is not on. You do this by depressing the green knob and twisting it to engage the timer allowing about 10 minutes of power draw for preheating the cabin.
Another option is to simply move the fuse block terminal ...from the main fuse block to a separate fuse block for the extra battery. So...while driving and running, the heater draws ppwer from the main battery.
So when you are stopped somewhere with engine off....like maybe at the drive-in movie theater with your honey ...in sub-freezing weather (with your wife at home chained comfortably/warmly to stove or radiator).....the heater froms from the auxiliary battery via the timer switch. This leaves the primary battery untouched for starting. Ray
The object is this: the heater is only enabled when the ignition switch is on....and since the ignition switch bypasses power accessories when you have the key in start position....the connection to terminal 30 at the starter allows an already running heater to have no interuptions while starting.
The non-switched (constant) power from the fuse block to the heater timer in the dash is what allows you to feed power to the heater when the ignition is not on. You do this by depressing the green knob and twisting it to engage the timer allowing about 10 minutes of power draw for preheating the cabin.
Another option is to simply move the fuse block terminal ...from the main fuse block to a separate fuse block for the extra battery. So...while driving and running, the heater draws ppwer from the main battery.
So when you are stopped somewhere with engine off....like maybe at the drive-in movie theater with your honey ...in sub-freezing weather (with your wife at home chained comfortably/warmly to stove or radiator).....the heater froms from the auxiliary battery via the timer switch. This leaves the primary battery untouched for starting. Ray
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raygreenwood
- Posts: 11907
- Joined: Wed Jan 22, 2003 12:01 am
Re: Where does the Eber draw power from?
wshawn wrote:raygreenwood wrote:With the twin battery option there are a couple of ways to go about this.
(1) The Heater draws its power from the grid....not straight from the battery. The battery supplies that grid. When you switch to the second battery you are simply connecting that second battery in place of the first with a switch so nothing changes. This is the simplest method. It requires that YOU do the switching though. It means that when warming the car interior prior to starting in the morning, you switch your battery isolation switch to position 2.....and just run the heater. Then...after you finish your shower, dress and chain your wife the the stove for the day....you come out and switch the battery isolater back to position 1 and start the car.
The other method is to split the heaters power all the way away from the grid and run it directly to battery #2. I don't have my diagrams close by but if memory serves, the heater draws power from two places. One from the main fuse block and one hot lead going to the T-2 connector over by the starter. This is so that when you are starting and running the heater at the same time....there is no service interuption to the heater. Don't quote me on that until I see my diagrams. Ray
I like the simplicity of option 1.
I'll have to look into that one regarding charging that battery, I'm assuming it must be possible to do that via a split charge relay/diode.
In the meaantime managed to pick up a 75 amp hour battery that was the same external dimensions of the old one.
I'll have to remind my wife that she should accept her position at home...then again she earns more than me so...
So...she chains you to the stove?.....if so....does she also require you to operate it?
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wshawn
- Posts: 209
- Joined: Thu Dec 27, 2007 6:36 am
Re: Where does the Eber draw power from?
raygreenwood wrote:wshawn wrote:raygreenwood wrote:With the twin battery option there are a couple of ways to go about this.
(1) The Heater draws its power from the grid....not straight from the battery. The battery supplies that grid. When you switch to the second battery you are simply connecting that second battery in place of the first with a switch so nothing changes. This is the simplest method. It requires that YOU do the switching though. It means that when warming the car interior prior to starting in the morning, you switch your battery isolation switch to position 2.....and just run the heater. Then...after you finish your shower, dress and chain your wife the the stove for the day....you come out and switch the battery isolater back to position 1 and start the car.
The other method is to split the heaters power all the way away from the grid and run it directly to battery #2. I don't have my diagrams close by but if memory serves, the heater draws power from two places. One from the main fuse block and one hot lead going to the T-2 connector over by the starter. This is so that when you are starting and running the heater at the same time....there is no service interuption to the heater. Don't quote me on that until I see my diagrams. Ray
I like the simplicity of option 1.
I'll have to look into that one regarding charging that battery, I'm assuming it must be possible to do that via a split charge relay/diode.
In the meaantime managed to pick up a 75 amp hour battery that was the same external dimensions of the old one.
I'll have to remind my wife that she should accept her position at home...then again she earns more than me so...
So...she chains you to the stove?.....if so....does she also require you to operate it?
and do you know what???
I enjoy it!!!!!!!!!!!!!!!!
The chains that is