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dan macmillan
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Joined: October 19, 2003
Posts: 3110
Location: Northern Ontario, Canada
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 Posted: Tue Nov 04, 2008 4:46 pm Post subject: BA6 gas heaters |
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I just finished rebuilding the entire heating system on my 76 bay. Heat exchangers, tubes, fans,valves and the BA6 gas heater. On heat exchangers I am getting approx 120 deg F coming out of the defrost vents. When I turn on the gas heater on LOW, I am getting 265 deg F out of the defroster. I think this is a little high. Ambient temp is -2 deg F.
What is the value I should be getting on LO and HIGH? I want to know the value before the overheat sensor shorts out the fuel pump fuse. I will be diagnosing the regulator circuit in the next few days. My manuals only list the output in BTU's
Thanks
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fukengruvenoval
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| Posted: Tue Nov 04, 2008 6:29 pm Post subject: Re: BA6 gas heaters |
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| dan macmillan wrote: |
| Ambient temp is -2 deg F. |
Dan, I'll let the others chime in on the heater, but I think you mean ambient is 2 degrees C. Even in Sudbury I doubt it's -19C, which is what -2F converts to...
Only mentioned it because it's a huge difference in ambient.
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dan macmillan
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Joined: October 19, 2003
Posts: 3110
Location: Northern Ontario, Canada
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| Posted: Tue Nov 04, 2008 8:31 pm Post subject: Re: BA6 gas heaters |
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| fukengruvenoval wrote: |
| dan macmillan wrote: |
| Ambient temp is -2 deg F. |
Dan, I'll let the others chime in on the heater, but I think you mean ambient is 2 degrees C. Even in Sudbury I doubt it's -19C, which is what -2F converts to...
Only mentioned it because it's a huge difference in ambient. |
Thanks, you are correct. I meant to say -2 deg C/30 deg F.
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dan macmillan
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Location: Northern Ontario, Canada
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| Posted: Sun Nov 09, 2008 1:04 pm Post subject: |
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It amazes me that out of 131 viewers, no one is able to answer this question.
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theizzardking
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| Posted: Mon Nov 17, 2008 12:00 pm Post subject: |
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seems to me like you should be happy with that, what's too hot for you heater, really? i know in my neck of the woods there is no such thing as my heater is putting out too much heat. just my opinion and maybe why you haven't gotten a response on this, i was just searching around to find if i could install a gas heater from a '76 into my '71 with out much complication and came across this. sorry if i come across like a jerk, but your heater sounds like it's working great to me!
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fusername
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| Posted: Mon Nov 17, 2008 12:22 pm Post subject: |
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problem is everyone is too jealous to reply. "what a jerk, all 'oh my buss is too hot, what ever shall I do', grumble grumble."
no, I have nothing constructive to add 
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josh
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| Posted: Mon Nov 17, 2008 12:51 pm Post subject: |
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I have a BA6 manual but it's buried in a storage unit somewhere.
I looked at the manual for the very similar BA4 and the overheat switch on that system works at 375*-400*F.
I don't think 265 is too high. Once the ducts warm up the air inside won't drop in temp between the heater and the defroster outlets. I don't know of any specific temps for the low and high settings for the BA6.
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theizzardking
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Location: seattle
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| Posted: Mon Nov 17, 2008 2:04 pm Post subject: |
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can some one comment on the use of a 76' gas heater in a '71
i too want my heat to be too hot!
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dan macmillan
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Joined: October 19, 2003
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Location: Northern Ontario, Canada
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| Posted: Mon Nov 17, 2008 2:46 pm Post subject: |
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| josh wrote: |
I have a BA6 manual but it's buried in a storage unit somewhere.
I looked at the manual for the very similar BA4 and the overheat switch on that system works at 375*-400*F.
I don't think 265 is too high. Once the ducts warm up the air inside won't drop in temp between the heater and the defroster outlets. I don't know of any specific temps for the low and high settings for the BA6. |
Thanks for the info. I realize many are having the opposite problem. In my case this info is important to know. Too high at the def vent and it melts plastic. Too high at the heater and the system is designed to short out the overheat switch, which is not resettable. New one will be needed and they are getting scarce. If by chance the switch were to fall out of it's mounting and did not short I could end up with a fire. Not a scenario I want to experience.
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theizzardking
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Location: seattle
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| Posted: Mon Nov 17, 2008 3:41 pm Post subject: |
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| dan macmillan wrote: |
| josh wrote: |
I have a BA6 manual but it's buried in a storage unit somewhere.
I looked at the manual for the very similar BA4 and the overheat switch on that system works at 375*-400*F.
I don't think 265 is too high. Once the ducts warm up the air inside won't drop in temp between the heater and the defroster outlets. I don't know of any specific temps for the low and high settings for the BA6. |
Thanks for the info. I realize many are having the opposite problem. In my case this info is important to know. Too high at the def vent and it melts plastic. Too high at the heater and the system is designed to short out the overheat switch, which is not resettable. New one will be needed and they are getting scarce. If by chance the switch were to fall out of it's mounting and did not short I could end up with a fire. Not a scenario I want to experience. |
wow i'd just cut the switch out of the circuit in that case and install an air temp gauge in it's place then you could see what the temp is for real when the heat is on and adjust accordingly. you can do that right? there's no computer that runs this thing is all just hard wired relays and such right?
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dwill49965
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Joined: August 08, 2005
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Location: Dartmouth, Nova Scotia
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| Posted: Mon Nov 17, 2008 4:37 pm Post subject: |
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The BA6 info is in the yellow manual.
There is an online version here:
http://www.vintagebus.com/techinfo/eber/index.html
I checked my yellow manual and it doesn't give any temps. It shows how to test it and replace it, but no temperatures.
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hiwaycallin
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Joined: May 07, 2008
Posts: 356
Location: Salmon Arm, BC
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| Posted: Mon Nov 17, 2008 4:48 pm Post subject: |
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| theizzardking wrote: |
can some one comment on the use of a 76' gas heater in a '71
i too want my heat to be too hot! |
I think you should go with your original idea of in-floor heat.  |
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theizzardking
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Location: seattle
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| Posted: Mon Nov 17, 2008 6:07 pm Post subject: |
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| hiwaycallin wrote: |
| theizzardking wrote: |
can some one comment on the use of a 76' gas heater in a '71
i too want my heat to be too hot! |
I think you should go with your original idea of in-floor heat. |
quit making me laugh haha!
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busdaddy
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| Posted: Mon Nov 17, 2008 7:36 pm Post subject: |
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Dan, from the looks of that manual unless you have a stash of NOS temp sensors the only way to reduce the cutout is tweeking tabs in the relay like adjusting a voltage regulator. Would it be easier to just install a thermostat like the BN-4's use in the output duct and regulate the pump?
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dan macmillan
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Joined: October 19, 2003
Posts: 3110
Location: Northern Ontario, Canada
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| Posted: Mon Nov 17, 2008 7:59 pm Post subject: |
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| busdaddy wrote: |
| Dan, from the looks of that manual unless you have a stash of NOS temp sensors the only way to reduce the cutout is tweeking tabs in the relay like adjusting a voltage regulator. Would it be easier to just install a thermostat like the BN-4's use in the output duct and regulate the pump? |
I have a few good temp sensors and the dash mounted control switches. What I do not have is a supply of overheat sensors. I am looking to find out if anyone knows the low cut in temp and the max high cut out temp. I want it to work as it did new without having the old style pump cut out. The dash switch contains electronics that turn off the pump at the set temp then restart it before the flame switch cools too much to switch the blowers off.
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64Bug
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Location: Ontario, Canada
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| Posted: Tue Nov 18, 2008 6:49 am Post subject: |
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Dan Macmillan wrote:
| Quote: |
| I have a few good temp sensors and the dash mounted control switches. What I do not have is a supply of overheat sensors. I am looking to find out if anyone knows the low cut in temp and the max high cut out temp. I want it to work as it did new without having the old style pump cut out. The dash switch contains electronics that turn off the pump at the set temp then restart it before the flame switch cools too much to switch the blowers off. |
You mentioned you were looking for low and high temp. Although its not temperature specific, I found this testing procedure in the BA6-BN4 manual from www.vintagebus.com
If you already have this info, my apologies, otherwise, I hope this works for you.
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dan macmillan
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Joined: October 19, 2003
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Location: Northern Ontario, Canada
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| Posted: Tue Nov 18, 2008 7:07 am Post subject: |
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| 64Bug wrote: |
Dan Macmillan wrote:
| Quote: |
| I have a few good temp sensors and the dash mounted control switches. What I do not have is a supply of overheat sensors. I am looking to find out if anyone knows the low cut in temp and the max high cut out temp. I want it to work as it did new without having the old style pump cut out. The dash switch contains electronics that turn off the pump at the set temp then restart it before the flame switch cools too much to switch the blowers off. |
You mentioned you were looking for low and high temp. Although its not temperature specific, I found this testing procedure in the BA6-BN4 manual from www.vintagebus.com
If you already have this info, my apologies, otherwise, I hope this works for you. |
Thanks. I do have all of the information ever published in all of the manuals. The spec is not there. That is why I am asking people in the real world that have a properly working system what their temp values are. It seems so far that no one has a properly working system.
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superalf72
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Joined: January 02, 2008
Posts: 24
Location: Italy
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| Posted: Mon Nov 24, 2008 10:50 am Post subject: |
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hello to all
first of all, sorry for my english, i'm writing form italy and my english is 'scholastic'
i have a westy 1975 with a BA6 and i i have one problem with it :
when it's start, i hear the heater working (like fire in the heater) and hot air comes out from the exhaust pipe but... inside of the bus no hot air
i just checked pump fuel, spark and sensor temperature and all works good (fuel pump makes tick-tick-tick...  )
mine BAS runs when i push down the middle thing (dunno the right word in english) on the das (that with red plastic cap) end when i obviously turn the green switch (that that has the timer too)
what have i to check ??? why hot air comes out from exhaust pie and not inside the bus (obviously i wanna hot clean air inside... lol)
thank in advance for qyour answers |
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busdaddy
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| Posted: Mon Nov 24, 2008 11:37 am Post subject: |
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It sounds like your blower fan is not working, it's located at the right rear of the heater and connects to a duct from under the rear seat. Connect a test light or meter to the wires supplying the motor and see if it gets power when the heater is running.
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superalf72
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Location: Italy
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| Posted: Tue Nov 25, 2008 1:48 am Post subject: |
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ok, i'll check that thing
thank you
ALF |
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