Re: [MBZ] OT Mini-van dual zone a/c
For my '75 Dodge van rear evaporator in '75, I ran regular, rubber AC hose from engine compartment under the vehicle (secured by tie wraps/zip ties) and up a rear, inside corner (covered on inside by a factory panel) to the evap mounted on ceiling immediately inside the rear doors. Still working great when I sold the van 17 years later. Wilton - Original Message - From: ned kleinhenz via Mercedes mercedes@okiebenz.com To: Mercedes List Mercedes@okiebenz.com Cc: ned kleinhenz ned.kleinh...@gmail.com Sent: Wednesday, August 12, 2015 2:56 PM Subject: Re: [MBZ] OT Mini-van dual zone a/c Thanks to everybody for the advice and enlightenment. For the most part, you have all reinforced what I was thinking. Just wanted to make sure I didn't miss anything. Actually, the evaporator itself is probably not leaking. The service adviser described the leaks as being in the o-ring joints that connect the several lengths of aluminum tubing connecting the front condenser to the rear evaporator setup. Those joints were all too corroded to separate. Presumably the tubing connections at the rear evaporator were similarly corroded. Of course the dealer's solution is to rip it all out and replace it. And from a dealer's -spare no cost to the customer- perspective this makes some sense. When I googled the problem, I saw some photos that showed the couplings are aluminum, tapped and held together with steel bolts. As you would expect, a little road salt would make the dis-similar metals fuse into an inseparable mass. It would take mucho time, skill and tools to replace just those joints. My wife says she doesn't care about the rear air conditioning, now that the kids left the nest. So I'll probably plug or bypass, as appropriate, the lines to the rear. To keep the records accurate, I can't speak extensively about Toyota, but this Sienna has been remarkably trouble free for the last 175,000 miles. The four Mercedes diesels I've driven over the past 30 years have never had an air conditioner failure. The only significant air conditioner failure we have ever experienced was in a Dodge Caravan my wife previously drove. Thanks again for the advice and help, Ned Kleinhenz ___ http://www.okiebenz.com To search list archives http://www.okiebenz.com/archive/ To Unsubscribe or change delivery options go to: http://mail.okiebenz.com/mailman/listinfo/mercedes_okiebenz.com ___ http://www.okiebenz.com To search list archives http://www.okiebenz.com/archive/ To Unsubscribe or change delivery options go to: http://mail.okiebenz.com/mailman/listinfo/mercedes_okiebenz.com
Re: [MBZ] OT Mini-van dual zone a/c
Curly, The Dodge was an '88 Grand Caravan. It's A/C compressor failed IIRC. Ned I suspected it was pre-MB. The 97 and later vans are pretty good. By 99 they were pretty dependable. the little square boxyones like your 88 had problems. I've had 99, 2000 and 09 ___ http://www.okiebenz.com To search list archives http://www.okiebenz.com/archive/ To Unsubscribe or change delivery options go to: http://mail.okiebenz.com/mailman/listinfo/mercedes_okiebenz.com
Re: [MBZ] OT Mini-van dual zone a/c
Curly, The Dodge was an '88 Grand Caravan. It's A/C compressor failed IIRC. Ned ___ http://www.okiebenz.com To search list archives http://www.okiebenz.com/archive/ To Unsubscribe or change delivery options go to: http://mail.okiebenz.com/mailman/listinfo/mercedes_okiebenz.com
Re: [MBZ] OT Mini-van dual zone a/c
Thanks to everybody for the advice and enlightenment. For the most part, you have all reinforced what I was thinking. Just wanted to make sure I didn't miss anything. Actually, the evaporator itself is probably not leaking. The service adviser described the leaks as being in the o-ring joints that connect the several lengths of aluminum tubing connecting the front condenser to the rear evaporator setup. Those joints were all too corroded to separate. Presumably the tubing connections at the rear evaporator were similarly corroded. Of course the dealer's solution is to rip it all out and replace it. And from a dealer's -spare no cost to the customer- perspective this makes some sense. When I googled the problem, I saw some photos that showed the couplings are aluminum, tapped and held together with steel bolts. As you would expect, a little road salt would make the dis-similar metals fuse into an inseparable mass. It would take mucho time, skill and tools to replace just those joints. My wife says she doesn't care about the rear air conditioning, now that the kids left the nest. So I'll probably plug or bypass, as appropriate, the lines to the rear. To keep the records accurate, I can't speak extensively about Toyota, but this Sienna has been remarkably trouble free for the last 175,000 miles. The four Mercedes diesels I've driven over the past 30 years have never had an air conditioner failure. The only significant air conditioner failure we have ever experienced was in a Dodge Caravan my wife previously drove. Thanks again for the advice and help, Ned Kleinhenz Heat the joints with an acetylene torch. Heating dissimilar metals with break the nearly unbreakable bond. A microtorch may generate enough heat for this. Was the caravan a pre-97 boxy kind? ___ http://www.okiebenz.com To search list archives http://www.okiebenz.com/archive/ To Unsubscribe or change delivery options go to: http://mail.okiebenz.com/mailman/listinfo/mercedes_okiebenz.com
Re: [MBZ] OT Mini-van dual zone a/c
Boy my emails take a long time to show up huh? I sent that one just before 5 and it showed up after 8... -Curt From: Curt Raymond via Mercedes mercedes@okiebenz.com To: Mercedes Discussion List mercedes@okiebenz.com Cc: Curt Raymond curtlud...@yahoo.com Sent: Tuesday, August 11, 2015 4:58 PM Subject: Re: [MBZ] OT Mini-van dual zone a/c A good AC shop can probably fix it for half what the dealership wanted or less... -Curt From: G Mann via Mercedes mercedes@okiebenz.com To: Mercedes Discussion List mercedes@okiebenz.com Cc: G Mann g2ma...@gmail.com Sent: Tuesday, August 11, 2015 4:18 PM Subject: Re: [MBZ] OT Mini-van dual zone a/c Operative word here is Dealer... Take it to a well versed independent AC shop and have them put in a piece of line that bypasses the rear evap unit, then recharge the system. The rear unit is plumbed in series with the front unit as far as the coolant flow, most likely. One compressor feeds both evaporators. Two controls, one for each evap, right? A good AC shop should have no issues sorting it out. On Tue, Aug 11, 2015 at 12:11 PM, ned kleinhenz via Mercedes mercedes@okiebenz.com wrote: My wife drives a 2006 Toyota Sienna. The air conditioning in that mini-van lost its refrigerant. The Toyota dealer wanted $3,595 to replace the corroded rear evaporator and rear refrigerant lines needed to fix the leak. I told the dealer “Air conditioning is nice, but not worth that much to us.” The dealer refused to block off the rear air conditioner, and only said, “You can’t do that”. I see there are several sources of special tubing plugs used to block off the rear air conditioning of this mini-van model. Does anybody have experience with this? Can the front A/C system of dual evaporator vehicle, work long term, with the back system blocked off? Thanks, Ned Kleinhenz 06 – E320 CDI 95 – E300D ___ http://www.okiebenz.com To search list archives http://www.okiebenz.com/archive/ To Unsubscribe or change delivery options go to: http://mail.okiebenz.com/mailman/listinfo/mercedes_okiebenz.com ___ http://www.okiebenz.com To search list archives http://www.okiebenz.com/archive/ To Unsubscribe or change delivery options go to: http://mail.okiebenz.com/mailman/listinfo/mercedes_okiebenz.com ___ http://www.okiebenz.com To search list archives http://www.okiebenz.com/archive/ To Unsubscribe or change delivery options go to: http://mail.okiebenz.com/mailman/listinfo/mercedes_okiebenz.com ___ http://www.okiebenz.com To search list archives http://www.okiebenz.com/archive/ To Unsubscribe or change delivery options go to: http://mail.okiebenz.com/mailman/listinfo/mercedes_okiebenz.com
Re: [MBZ] OT Mini-van dual zone a/c
They have been routed through Hillary! Clinton's email server, and the Secret Service guys have to check them to make sure they haven't been hacked. --R On 8/11/15 8:53 PM, Curt Raymond via Mercedes wrote: Boy my emails take a long time to show up huh? I sent that one just before 5 and it showed up after 8... -Curt ___ http://www.okiebenz.com To search list archives http://www.okiebenz.com/archive/ To Unsubscribe or change delivery options go to: http://mail.okiebenz.com/mailman/listinfo/mercedes_okiebenz.com
Re: [MBZ] OT Mini-van dual zone a/c
Thanks to everybody for the advice and enlightenment. For the most part, you have all reinforced what I was thinking. Just wanted to make sure I didn't miss anything. Actually, the evaporator itself is probably not leaking. The service adviser described the leaks as being in the o-ring joints that connect the several lengths of aluminum tubing connecting the front condenser to the rear evaporator setup. Those joints were all too corroded to separate. Presumably the tubing connections at the rear evaporator were similarly corroded. Of course the dealer's solution is to rip it all out and replace it. And from a dealer's -spare no cost to the customer- perspective this makes some sense. When I googled the problem, I saw some photos that showed the couplings are aluminum, tapped and held together with steel bolts. As you would expect, a little road salt would make the dis-similar metals fuse into an inseparable mass. It would take mucho time, skill and tools to replace just those joints. My wife says she doesn't care about the rear air conditioning, now that the kids left the nest. So I'll probably plug or bypass, as appropriate, the lines to the rear. To keep the records accurate, I can't speak extensively about Toyota, but this Sienna has been remarkably trouble free for the last 175,000 miles. The four Mercedes diesels I've driven over the past 30 years have never had an air conditioner failure. The only significant air conditioner failure we have ever experienced was in a Dodge Caravan my wife previously drove. Thanks again for the advice and help, Ned Kleinhenz ___ http://www.okiebenz.com To search list archives http://www.okiebenz.com/archive/ To Unsubscribe or change delivery options go to: http://mail.okiebenz.com/mailman/listinfo/mercedes_okiebenz.com
Re: [MBZ] OT Mini-van dual zone a/c
I think I would be complaining to Toyota too. Notwithstanding the fact that the vehicle is 10 years old, why would the evaporator be corroded? I had an 86 Chevy Suburban with dual air and had some trouble with the aluminum pipes under the vehicle being eaten by salt until I figured out a way to provide some protection to them but I never had any issues with the evaporator. I replaced the pipes twice at $300+ each time but it sure did not cost $3600. RB On 11/08/2015 2:11 PM, ned kleinhenz via Mercedes wrote: My wife drives a 2006 Toyota Sienna. The air conditioning in that mini-van lost its refrigerant. The Toyota dealer wanted $3,595 to replace the corroded rear evaporator and rear refrigerant lines needed to fix the leak. I told the dealer “Air conditioning is nice, but not worth that much to us.” The dealer refused to block off the rear air conditioner, and only said, “You can’t do that”. I see there are several sources of special tubing plugs used to block off the rear air conditioning of this mini-van model. Does anybody have experience with this? Can the front A/C system of dual evaporator vehicle, work long term, with the back system blocked off? Thanks, Ned Kleinhenz ___ http://www.okiebenz.com To search list archives http://www.okiebenz.com/archive/ To Unsubscribe or change delivery options go to: http://mail.okiebenz.com/mailman/listinfo/mercedes_okiebenz.com
Re: [MBZ] OT Mini-van dual zone a/c
My favorite reply to You can't do that is, Just watch. Wilton - Original Message - From: G Mann via Mercedes mercedes@okiebenz.com To: Mercedes Discussion List mercedes@okiebenz.com Cc: G Mann g2ma...@gmail.com Sent: Tuesday, August 11, 2015 4:18 PM Subject: Re: [MBZ] OT Mini-van dual zone a/c Operative word here is Dealer... Take it to a well versed independent AC shop and have them put in a piece of line that bypasses the rear evap unit, then recharge the system. The rear unit is plumbed in series with the front unit as far as the coolant flow, most likely. One compressor feeds both evaporators. Two controls, one for each evap, right? A good AC shop should have no issues sorting it out. On Tue, Aug 11, 2015 at 12:11 PM, ned kleinhenz via Mercedes mercedes@okiebenz.com wrote: My wife drives a 2006 Toyota Sienna. The air conditioning in that mini-van lost its refrigerant. The Toyota dealer wanted $3,595 to replace the corroded rear evaporator and rear refrigerant lines needed to fix the leak. I told the dealer “Air conditioning is nice, but not worth that much to us.” The dealer refused to block off the rear air conditioner, and only said, “You can’t do that”. I see there are several sources of special tubing plugs used to block off the rear air conditioning of this mini-van model. Does anybody have experience with this? Can the front A/C system of dual evaporator vehicle, work long term, with the back system blocked off? Thanks, Ned Kleinhenz 06 – E320 CDI 95 – E300D ___ http://www.okiebenz.com To search list archives http://www.okiebenz.com/archive/ To Unsubscribe or change delivery options go to: http://mail.okiebenz.com/mailman/listinfo/mercedes_okiebenz.com ___ http://www.okiebenz.com To search list archives http://www.okiebenz.com/archive/ To Unsubscribe or change delivery options go to: http://mail.okiebenz.com/mailman/listinfo/mercedes_okiebenz.com ___ http://www.okiebenz.com To search list archives http://www.okiebenz.com/archive/ To Unsubscribe or change delivery options go to: http://mail.okiebenz.com/mailman/listinfo/mercedes_okiebenz.com
Re: [MBZ] OT Mini-van dual zone a/c
A good AC shop can probably fix it for half what the dealership wanted or less... -Curt From: G Mann via Mercedes mercedes@okiebenz.com To: Mercedes Discussion List mercedes@okiebenz.com Cc: G Mann g2ma...@gmail.com Sent: Tuesday, August 11, 2015 4:18 PM Subject: Re: [MBZ] OT Mini-van dual zone a/c Operative word here is Dealer... Take it to a well versed independent AC shop and have them put in a piece of line that bypasses the rear evap unit, then recharge the system. The rear unit is plumbed in series with the front unit as far as the coolant flow, most likely. One compressor feeds both evaporators. Two controls, one for each evap, right? A good AC shop should have no issues sorting it out. On Tue, Aug 11, 2015 at 12:11 PM, ned kleinhenz via Mercedes mercedes@okiebenz.com wrote: My wife drives a 2006 Toyota Sienna. The air conditioning in that mini-van lost its refrigerant. The Toyota dealer wanted $3,595 to replace the corroded rear evaporator and rear refrigerant lines needed to fix the leak. I told the dealer “Air conditioning is nice, but not worth that much to us.” The dealer refused to block off the rear air conditioner, and only said, “You can’t do that”. I see there are several sources of special tubing plugs used to block off the rear air conditioning of this mini-van model. Does anybody have experience with this? Can the front A/C system of dual evaporator vehicle, work long term, with the back system blocked off? Thanks, Ned Kleinhenz 06 – E320 CDI 95 – E300D ___ http://www.okiebenz.com To search list archives http://www.okiebenz.com/archive/ To Unsubscribe or change delivery options go to: http://mail.okiebenz.com/mailman/listinfo/mercedes_okiebenz.com ___ http://www.okiebenz.com To search list archives http://www.okiebenz.com/archive/ To Unsubscribe or change delivery options go to: http://mail.okiebenz.com/mailman/listinfo/mercedes_okiebenz.com ___ http://www.okiebenz.com To search list archives http://www.okiebenz.com/archive/ To Unsubscribe or change delivery options go to: http://mail.okiebenz.com/mailman/listinfo/mercedes_okiebenz.com
Re: [MBZ] OT Mini-van dual zone a/c
Friends don't let friends drive a toada. get a dogde. They run 300 to 350k miles and the A/c works. I see no reason why you can't plug off the rear. Plug em and charge the remaining system. My wife drives a 2006 Toyota Sienna. The air conditioning in that mini-van lost its refrigerant. The Toyota dealer wanted $3,595 to replace the corroded rear evaporator and rear refrigerant lines needed to fix the leak. I told the dealer Air conditioning is nice, but not worth that much to us. The dealer refused to block off the rear air conditioner, and only said, You can't do that. I see there are several sources of special tubing plugs used to block off the rear air conditioning of this mini-van model. Does anybody have experience with this? Can the front A/C system of dual evaporator vehicle, work long term, with the back system blocked off? Thanks, Ned Kleinhenz 06 - E320 CDI 95 - E300D ___ http://www.okiebenz.com To search list archives http://www.okiebenz.com/archive/ To Unsubscribe or change delivery options go to: http://mail.okiebenz.com/mailman/listinfo/mercedes_okiebenz.com ___ http://www.okiebenz.com To search list archives http://www.okiebenz.com/archive/ To Unsubscribe or change delivery options go to: http://mail.okiebenz.com/mailman/listinfo/mercedes_okiebenz.com
Re: [MBZ] OT Mini-van dual zone a/c
ATTABOY On Aug 11, 2015 5:48 PM, WILTON via Mercedes mercedes@okiebenz.com wrote: My favorite reply to You can't do that is, Just watch. Wilton - Original Message - From: G Mann via Mercedes mercedes@okiebenz.com To: Mercedes Discussion List mercedes@okiebenz.com Cc: G Mann g2ma...@gmail.com Sent: Tuesday, August 11, 2015 4:18 PM Subject: Re: [MBZ] OT Mini-van dual zone a/c Operative word here is Dealer... Take it to a well versed independent AC shop and have them put in a piece of line that bypasses the rear evap unit, then recharge the system. The rear unit is plumbed in series with the front unit as far as the coolant flow, most likely. One compressor feeds both evaporators. Two controls, one for each evap, right? A good AC shop should have no issues sorting it out. On Tue, Aug 11, 2015 at 12:11 PM, ned kleinhenz via Mercedes mercedes@okiebenz.com wrote: My wife drives a 2006 Toyota Sienna. The air conditioning in that mini-van lost its refrigerant. The Toyota dealer wanted $3,595 to replace the corroded rear evaporator and rear refrigerant lines needed to fix the leak. I told the dealer “Air conditioning is nice, but not worth that much to us.” The dealer refused to block off the rear air conditioner, and only said, “You can’t do that”. I see there are several sources of special tubing plugs used to block off the rear air conditioning of this mini-van model. Does anybody have experience with this? Can the front A/C system of dual evaporator vehicle, work long term, with the back system blocked off? Thanks, Ned Kleinhenz 06 – E320 CDI 95 – E300D ___ http://www.okiebenz.com To search list archives http://www.okiebenz.com/archive/ To Unsubscribe or change delivery options go to: http://mail.okiebenz.com/mailman/listinfo/mercedes_okiebenz.com ___ http://www.okiebenz.com To search list archives http://www.okiebenz.com/archive/ To Unsubscribe or change delivery options go to: http://mail.okiebenz.com/mailman/listinfo/mercedes_okiebenz.com ___ http://www.okiebenz.com To search list archives http://www.okiebenz.com/archive/ To Unsubscribe or change delivery options go to: http://mail.okiebenz.com/mailman/listinfo/mercedes_okiebenz.com ___ http://www.okiebenz.com To search list archives http://www.okiebenz.com/archive/ To Unsubscribe or change delivery options go to: http://mail.okiebenz.com/mailman/listinfo/mercedes_okiebenz.com
[MBZ] OT Mini-van dual zone a/c
My wife drives a 2006 Toyota Sienna. The air conditioning in that mini-van lost its refrigerant. The Toyota dealer wanted $3,595 to replace the corroded rear evaporator and rear refrigerant lines needed to fix the leak. I told the dealer “Air conditioning is nice, but not worth that much to us.” The dealer refused to block off the rear air conditioner, and only said, “You can’t do that”. I see there are several sources of special tubing plugs used to block off the rear air conditioning of this mini-van model. Does anybody have experience with this? Can the front A/C system of dual evaporator vehicle, work long term, with the back system blocked off? Thanks, Ned Kleinhenz 06 – E320 CDI 95 – E300D ___ http://www.okiebenz.com To search list archives http://www.okiebenz.com/archive/ To Unsubscribe or change delivery options go to: http://mail.okiebenz.com/mailman/listinfo/mercedes_okiebenz.com
Re: [MBZ] OT Mini-van dual zone a/c
Operative word here is Dealer... Take it to a well versed independent AC shop and have them put in a piece of line that bypasses the rear evap unit, then recharge the system. The rear unit is plumbed in series with the front unit as far as the coolant flow, most likely. One compressor feeds both evaporators. Two controls, one for each evap, right? A good AC shop should have no issues sorting it out. On Tue, Aug 11, 2015 at 12:11 PM, ned kleinhenz via Mercedes mercedes@okiebenz.com wrote: My wife drives a 2006 Toyota Sienna. The air conditioning in that mini-van lost its refrigerant. The Toyota dealer wanted $3,595 to replace the corroded rear evaporator and rear refrigerant lines needed to fix the leak. I told the dealer “Air conditioning is nice, but not worth that much to us.” The dealer refused to block off the rear air conditioner, and only said, “You can’t do that”. I see there are several sources of special tubing plugs used to block off the rear air conditioning of this mini-van model. Does anybody have experience with this? Can the front A/C system of dual evaporator vehicle, work long term, with the back system blocked off? Thanks, Ned Kleinhenz 06 – E320 CDI 95 – E300D ___ http://www.okiebenz.com To search list archives http://www.okiebenz.com/archive/ To Unsubscribe or change delivery options go to: http://mail.okiebenz.com/mailman/listinfo/mercedes_okiebenz.com ___ http://www.okiebenz.com To search list archives http://www.okiebenz.com/archive/ To Unsubscribe or change delivery options go to: http://mail.okiebenz.com/mailman/listinfo/mercedes_okiebenz.com
Re: [MBZ] OT Mini-van dual zone a/c
'Certainly should be able to if the refrigerant lines to the rear evap are blocked/rerouted so as to isolate the rear evap from the system and the lines for the front evap are connected so as to provide a complete circuit only to/from the front evap. In '75 I added an AC evaporator to rear of a '75 Dodge; merely spliced T fittings into the refrig lines under the hood to send refrig to rear evap (Frigiking) in a parallel manner. If your evaps are in series, merely cut/block lines to rear and install a coupling to reroute the refrig back to compressor and condenser without gong to rear. Fill system as appropriate. You (I) can't do that too often means, I don't want to. Wilton - Original Message - From: ned kleinhenz via Mercedes mercedes@okiebenz.com To: Mercedes List Mercedes@okiebenz.com Cc: ned kleinhenz ned.kleinh...@gmail.com Sent: Tuesday, August 11, 2015 3:11 PM Subject: [MBZ] OT Mini-van dual zone a/c My wife drives a 2006 Toyota Sienna. The air conditioning in that mini-van lost its refrigerant. The Toyota dealer wanted $3,595 to replace the corroded rear evaporator and rear refrigerant lines needed to fix the leak. I told the dealer “Air conditioning is nice, but not worth that much to us.” The dealer refused to block off the rear air conditioner, and only said, “You can’t do that”. I see there are several sources of special tubing plugs used to block off the rear air conditioning of this mini-van model. Does anybody have experience with this? Can the front A/C system of dual evaporator vehicle, work long term, with the back system blocked off? Thanks, Ned Kleinhenz 06 – E320 CDI 95 – E300D ___ http://www.okiebenz.com To search list archives http://www.okiebenz.com/archive/ To Unsubscribe or change delivery options go to: http://mail.okiebenz.com/mailman/listinfo/mercedes_okiebenz.com ___ http://www.okiebenz.com To search list archives http://www.okiebenz.com/archive/ To Unsubscribe or change delivery options go to: http://mail.okiebenz.com/mailman/listinfo/mercedes_okiebenz.com
Re: [MBZ] OT Mini-van dual zone a/c
Most likely in parallel with expansion valve at each evap. like my '75 Dodge. I could run both at same time or either one independently - did so for about 17 years. Wilton - Original Message - From: Curly McLain via Mercedes mercedes@okiebenz.com To: Mercedes Discussion List mercedes@okiebenz.com Cc: Curly McLain 126die...@gmail.com Sent: Tuesday, August 11, 2015 10:40 PM Subject: Re: [MBZ] OT Mini-van dual zone a/c The rear unit is plumbed in series with the front unit as far as the coolant flow, most likely. Unlikely. Remember how AC works: it is not pumping cold fluid around, it is pumping HOT fluid around. The phase change that occurs at/after the expansion valve sucks the heat out of the environment. After the phase change the coolant is cold, but has little remaining heat-carrying capacity. My read on it is that there are TWO expansion valves, all is is wired in parallel. The compressor/condenser is sized up accordingly. But look it up for sure. -- Jim I think this is correct. either can run independently of the other, or both can run at the same time, or both can be off. Plug off the in and out of the bad evap and charge what is left. The trick is how much is a full charge. Sight glass is the key for this deal. Scale won't help, other than to determine how much actually went in. ___ http://www.okiebenz.com To search list archives http://www.okiebenz.com/archive/ To Unsubscribe or change delivery options go to: http://mail.okiebenz.com/mailman/listinfo/mercedes_okiebenz.com ___ http://www.okiebenz.com To search list archives http://www.okiebenz.com/archive/ To Unsubscribe or change delivery options go to: http://mail.okiebenz.com/mailman/listinfo/mercedes_okiebenz.com
Re: [MBZ] OT Mini-van dual zone a/c
G Mann wrote: The rear unit is plumbed in series with the front unit as far as the coolant flow, most likely. Jim wrote: Unlikely. My read on it is that there are TWO expansion valves, all is is wired in parallel. The compressor/condenser is sized up accordingly. That's how my Suburban with rear A/C works. Two valves. ___ http://www.okiebenz.com To search list archives http://www.okiebenz.com/archive/ To Unsubscribe or change delivery options go to: http://mail.okiebenz.com/mailman/listinfo/mercedes_okiebenz.com
Re: [MBZ] OT Mini-van dual zone a/c
Curly, I stand corrected. Your verbal diagram is the more likely arrangement. On Tue, Aug 11, 2015 at 7:40 PM, Curly McLain via Mercedes mercedes@okiebenz.com wrote: The rear unit is plumbed in series with the front unit as far as the coolant flow, most likely. Unlikely. Remember how AC works: it is not pumping cold fluid around, it is pumping HOT fluid around. The phase change that occurs at/after the expansion valve sucks the heat out of the environment. After the phase change the coolant is cold, but has little remaining heat-carrying capacity. My read on it is that there are TWO expansion valves, all is is wired in parallel. The compressor/condenser is sized up accordingly. But look it up for sure. -- Jim I think this is correct. either can run independently of the other, or both can run at the same time, or both can be off. Plug off the in and out of the bad evap and charge what is left. The trick is how much is a full charge. Sight glass is the key for this deal. Scale won't help, other than to determine how much actually went in. ___ http://www.okiebenz.com To search list archives http://www.okiebenz.com/archive/ To Unsubscribe or change delivery options go to: http://mail.okiebenz.com/mailman/listinfo/mercedes_okiebenz.com ___ http://www.okiebenz.com To search list archives http://www.okiebenz.com/archive/ To Unsubscribe or change delivery options go to: http://mail.okiebenz.com/mailman/listinfo/mercedes_okiebenz.com
Re: [MBZ] OT Mini-van dual zone a/c
Uh, I think that was Jim, whom I quoted. Curly, I stand corrected. Your verbal diagram is the more likely arrangement. On Tue, Aug 11, 2015 at 7:40 PM, Curly McLain via Mercedes mercedes@okiebenz.com wrote: Unlikely. Remember how AC works: it is not pumping cold fluid around, it is pumping HOT fluid around. The phase change that occurs at/after the expansion valve sucks the heat out of the environment. After the phase change the coolant is cold, but has little remaining heat-carrying capacity. My read on it is that there are TWO expansion valves, all is is wired in parallel. The compressor/condenser is sized up accordingly. But look it up for sure. -- Jim I think this is correct. either can run independently of the other, or both can run at the same time, or both can be off. Plug off the in and out of the bad evap and charge what is left. The trick is how much is a full charge. Sight glass is the key for this deal. Scale won't help, other than to determine how much actually went in. ___ http://www.okiebenz.com To search list archives http://www.okiebenz.com/archive/ To Unsubscribe or change delivery options go to: http://mail.okiebenz.com/mailman/listinfo/mercedes_okiebenz.com
