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partsman914
Samba Member
Joined: July 31, 2012
Posts: 24
Location: Boston, MA
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 Posted: Fri Jan 27, 2023 7:58 pm Post subject: New to me ‘78 bay window with DPD AC question |
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Hi everybody….
I recently bought a ‘78 CE II, with the DPD ac system mounted by the sunvisors…I’m investigating and sorting things out, but I can’t find any USER manual for this system. I found the installation manual, and have read through a bunch of threads but I can’t seem to find out what the rocket switch in the center is for…
I know the two knobs are fan and temp controls, is the rocker switch how it turns on? I’ve been thinking that the system turns on by the fan switch but maybe I’m wrong.
I hope someone can clarify this for me…
Thanks
Eric
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busdaddy
Samba Member
Joined: February 12, 2004
Posts: 51149
Location: Surrey B.C. Canada, but thinking of Ukraine
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partsman914
Samba Member
Joined: July 31, 2012
Posts: 24
Location: Boston, MA
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| Posted: Sat Jan 28, 2023 12:41 pm Post subject: Re: New to me ‘78 bay window with DPD AC question |
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I appreciate the response, but in my original post I stated that I had read the installation manual, but it does not mention the rocker switch. I also mentioned that this was not a “under dash unit”….the other instructions I had read already too….
So once again, I ask does anyone know the function of the rocker switch on the exact model of the ceiling mounted DPD ac unit? I figure the unit must turn on by rotation the fan knob, but I’m not sure. My unit does not have power right now so that’s why I’m in the dark…
Eric |
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busdaddy
Samba Member
Joined: February 12, 2004
Posts: 51149
Location: Surrey B.C. Canada, but thinking of Ukraine
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| Posted: Sat Jan 28, 2023 1:53 pm Post subject: Re: New to me ‘78 bay window with DPD AC question |
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Start poking switches and find out, I'm sure everything that's sensitive is fused or protected, you have nothing to lose.
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alman72
Samba Member
Joined: October 09, 2014
Posts: 2573
Location: MICHIGAN
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| Posted: Sat Jan 28, 2023 2:07 pm Post subject: Re: New to me ‘78 bay window with DPD AC question |
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post a pic of the engine bay. I would be surprised if the compressor was even still there.
I do admire your optimism at getting a 40+ year old AC working. |
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69BahamaYellow
Samba Member
Joined: April 22, 2011
Posts: 537
Location: Talbott, TN
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| Posted: Sat Jan 28, 2023 2:26 pm Post subject: Re: New to me ‘78 bay window with DPD AC question |
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| If it is a 3 position switch, then the left position is for left fan only. The right position is right fan only and the center position is both fans. The on/off as well as the fan speed is controlled by the round fan knob. All the way counter clockwise is off, and each click clockwise is faster fan speed. The temp switch controls compressor cycling. All the way counter clockwise turns the compressor off all the time, while all the way clockwise is compressor on full time ( like the max cold setting on a modern car. A setting between the two just makes the compressor cycle on more or less often. Since these systems do not have blend doors to mix hot and cold air from outside the car ( like a modern car does) then turning the compressor on and off is is the only way to control temperature. |
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partsman914
Samba Member
Joined: July 31, 2012
Posts: 24
Location: Boston, MA
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| Posted: Sat Jan 28, 2023 7:01 pm Post subject: Re: New to me ‘78 bay window with DPD AC question |
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| 69BahamaYellow wrote: |
| If it is a 3 position switch, then the left position is for left fan only. The right position is right fan only and the center position is both fans. The on/off as well as the fan speed is controlled by the round fan knob. All the way counter clockwise is off, and each click clockwise is faster fan speed. The temp switch controls compressor cycling. All the way counter clockwise turns the compressor off all the time, while all the way clockwise is compressor on full time ( like the max cold setting on a modern car. A setting between the two just makes the compressor cycle on more or less often. Since these systems do not have blend doors to mix hot and cold air from outside the car ( like a modern car does) then turning the compressor on and off is is the only way to control temperature. |
Perfect!!! Thank you very much. That was EXACTLY the info I was looking for. I was very impressed with your thread, it’s what inspired me to get mine up and running.
Eric |
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