Sponsored by Winnebago Industries

Author Topic: Basement AC Output  (Read 449 times)

Kaputnick

  • ---
  • Posts: 20
Basement AC Output
« on: July 24, 2017, 04:07:55 PM »
What temp can you expect at the registers? Using my laser temp gauge I get 71F which sounds low? Also, I assume my unit is a Coleman? Is there a way to tell?

2006 Itasca Suncruiser 38T
Workhorse Chassis

John Hilley

  • ---
  • Posts: 1656
Re: Basement AC Output
« Reply #1 on: July 24, 2017, 04:22:19 PM »
They were all Coleman Airxcel. That may be right Temp if you ar in 90F or hotter. Temperature differential should be 15F or more

Here is the 6536 manual
http://bryantrv.com/docs2/docs/rvp/6536heatpump.pdf

WIT Winnebago AC Service Tips
https://winnebagoind.com/resources/service/pdfs/1999-06%20Air%20Conditioning.pdf
2003 Winnebago Adventurer 38G
1999 Jeep Cherokee Sport
1999 Winnebago Brave 35C
  Handicap Lift & Hospital Bed

IslandGuy

  • ---
  • Posts: 468
Re: Basement AC Output
« Reply #2 on: July 24, 2017, 05:42:15 PM »
What temp can you expect at the registers? Using my laser temp gauge I get 71F which sounds low? Also, I assume my unit is a Coleman? Is there a way to tell?
Output register in the ceiling should be 15-20 cooler than what you measure at the return register...have you checked your AC filter to make sure it is not plugged?
Jim

2009 WGO Tour 40TD
2012 Honda Fit Sport 5 sp, SMI Stay-In-Play
Saddlebrooke, AZ

"Your beliefs don't make you a better person...your behavior does."

John Canfield

  • Forum Staff
  • ---
  • *
  • Posts: 11942
    • Jane and John's Internet Home
Re: Basement AC Output
« Reply #3 on: July 24, 2017, 05:43:32 PM »
Using a non-contact thermometer will not give you an accurate outlet air temp unless you hit the exact right spot (it's complicated). Use one of those 'button' pencil type thermometers.
--John
2005 Horizon 40AD, 2006 Jeep Rubicon Unlimited
Our Horizon projects
Our weather

afchap

  • ---
  • Posts: 1171
    • The Empty Nest
Re: Basement AC Output
« Reply #4 on: July 24, 2017, 06:22:04 PM »
My dual compressor basement unit consistently hits temps at the outlet up to 40 degrees colder than the intake air ...measured w/an infrared thermometer aimed into the duct and held there for a minute or more. Yes, I have been told that is impossible, but other owners of this unit have reported the same.  Other types of measurement may give different readings, but infrared is what I use. If a single compressor unit is expected to attain temps of apx 20 degrees colder than intake air, doesn't it stand to reason that a dual compressor unit would attain colder differential temps than 20 degrees?  If my differential gets closer to 30 than to 40 I know that rear duct is probably split open again.

Oh, and on these units, if the air filter is clogged when running in AC mode the unit will freeze up and you will have no air flow. You will have to turn the unit off ...or on fan only ...and let it thaw out after you change the filter.  If the air filter is clogged when running in heat mode, you will trip the high pressure switch on one of both compressors. That requires opening at least the electrical box on the face of the unit  ...the voice of personal experience.  CHECK and CHANGE the filter frequently!!
« Last Edit: July 24, 2017, 06:28:17 PM by afchap »
Paul ... (KE5LXU), was fulltimin', now parttimin'...
'03 Winnebago Ultimate Advantage 40e
'05 Honda Odyssey toad
Escapees, FMCA, SMART, WIT
http://www.pjrider.com

RGrimm

  • ---
  • Posts: 109
  • Starting Our Adventure
Re: Basement AC Output
« Reply #5 on: July 25, 2017, 06:54:03 AM »
I checked my register temps last night.

Ref: 2006 Winnebago Journey 34H

  • Outside Temp was 84 degrees
  • 9:30 pm (sun had set)
  • Temp taken at 3rd register from back, driver's side. I have 7 registers per side.
  • Temperatures take with an Infrared thermometer with trigger held for 15 seconds

--> With one compressor running the temp was 68 degrees at register
--> With both compressors running the temp was 48 degrees at register

It is expected to get to 94 here today (high humidity), if I get a chance I'll test again at during the daytime.

Russ
« Last Edit: July 25, 2017, 06:58:02 AM by RGrimm »
~ Russ and Arlene ~
Northeast Florida
2006 Winnebago Journey 34H
Towing - 2013 Edge Limited
SMI - Air Force 1 Aux Braking
Blackhawk 2 All Terrain 10K

JoelP

  • ---
  • Posts: 415
Re: Basement AC Output
« Reply #6 on: July 25, 2017, 07:34:39 AM »
Using a non-contact thermometer will not give you an accurate outlet air temp unless you hit the exact right spot (it's complicated). Use one of those 'button' pencil type thermometers.

John, not sure what you mean when you say noncontact button/pencil probes.  Would something like this be best?  This seems to allow placement of the probe.

https://www.amazon.com/Ambient-Weather-WS-2063-W-Temperature-Backlight/dp/B01IJ1VLYU/ref=sr_1_cc_1?s=aps&ie=UTF8&qid=1500985781&sr=1-1-catcorr&keywords=weather+thermometer+with+button+probe

I need to look for the manual for my basement unit to see if there is any filter besides the obvious grill facing the exterior.



Joel from San Jose

2010 Itasca Suncruiser 37F
8.1L Chevy Workhorse with Banks PowerPack
2016 CMax Energi Hybrid dinghy

John Canfield

  • Forum Staff
  • ---
  • *
  • Posts: 11942
    • Jane and John's Internet Home
Re: Basement AC Output
« Reply #7 on: July 25, 2017, 08:10:01 AM »
John, not sure what you mean when you say noncontact button/pencil probes.  Would something like this be best?  This seems to allow placement of the probe.
That one could possibly work but this is the traditional HVAC thermometer. Stick it in a register or duct and wait about five minutes or so.

Quote
I need to look for the manual for my basement unit to see if there is any filter besides the obvious grill facing the exterior.
You should only have one filter for the basement unit. There's a good bet your coils (underneath the AC filter) need to be cleaned.  You can use your non-contact IR gun to check your rear cap for any duct air leakage. Wave your IR gun back and forth and up and down the fiberglass surface. If you read any spots with cooler temperatures then your duct(s) is probably leaking. I have a document near the bottom of my RV web page with instructions of how to partially remove the rear cap to fix/upgrade the duct(s.)

By the way - get the cheapest filter for the basement air, you want maximum air flow over the coil.
--John
2005 Horizon 40AD, 2006 Jeep Rubicon Unlimited
Our Horizon projects
Our weather

JoelP

  • ---
  • Posts: 415
Re: Basement AC Output
« Reply #8 on: July 25, 2017, 08:36:06 AM »
Thanks John.  I bought one of each of these temperature measurement devices and will also look at the filter and coils.

Joel
Joel from San Jose

2010 Itasca Suncruiser 37F
8.1L Chevy Workhorse with Banks PowerPack
2016 CMax Energi Hybrid dinghy

JoelP

  • ---
  • Posts: 415
Re: Basement AC Output
« Reply #9 on: July 25, 2017, 08:55:09 AM »
...I have a document near the bottom of my RV web page with instructions of how to partially remove the rear cap to fix/upgrade the duct(s.)...

John - please provide a link to your RV webpage for this.  I found one nice article in the library on how to remove the AC unit entirely to access the ducts and to service the interior of the AC unit.  This encouraged me to do this one day, but surely it must be easier to access this filter without removing the entire AC.  Thanks!

Joel
Joel from San Jose

2010 Itasca Suncruiser 37F
8.1L Chevy Workhorse with Banks PowerPack
2016 CMax Energi Hybrid dinghy

John Canfield

  • Forum Staff
  • ---
  • *
  • Posts: 11942
    • Jane and John's Internet Home
Re: Basement AC Output
« Reply #10 on: July 25, 2017, 09:09:55 AM »
This is the document about pulling (actually tilting back) the rear cap. I have no idea if the basement unit needs to be removed first.
--John
2005 Horizon 40AD, 2006 Jeep Rubicon Unlimited
Our Horizon projects
Our weather

afchap

  • ---
  • Posts: 1171
    • The Empty Nest
Re: Basement AC Output
« Reply #11 on: July 25, 2017, 09:39:28 AM »
I need to look for the manual for my basement unit to see if there is any filter besides the obvious grill facing the exterior.
Not sure what you mean here ... exterior=outside?? The only FILTER for the unit will be INSIDE the coach. Mine is under a lift up panel in the closet floor several feet from the visible intake grill at the foot of the bed. Many have the filter under a cabinet, etc. The inside filter protects the inside coils from getting dirty, but of course that can still happen after an extended time. Some can be cleaned w/o removing the unit, while others would be extremely difficult or impossible. On the OUTSIDE, the visible coils may require cleaning more often as they can collect leaves or other debris.
Paul ... (KE5LXU), was fulltimin', now parttimin'...
'03 Winnebago Ultimate Advantage 40e
'05 Honda Odyssey toad
Escapees, FMCA, SMART, WIT
http://www.pjrider.com

JoelP

  • ---
  • Posts: 415
Re: Basement AC Output
« Reply #12 on: July 25, 2017, 09:45:13 AM »
Not sure what you mean here ... exterior=outside?? The only FILTER for the unit will be INSIDE the coach. Mine is under a lift up panel in the closet floor several feet from the visible intake grill at the foot of the bed. Many have the filter under a cabinet, etc. The inside filter protects the inside coils from getting dirty, but of course that can still happen after an extended time. Some can be cleaned w/o removing the unit, while others would be extremely difficult or impossible. On the OUTSIDE, the visible coils may require cleaning more often as they can collect leaves or other debris.

OK, now I understand that there is an inside filter that I need to hunt for as well as inside coils.  I was under the impression that all of the cooling coils were right in the AC unit, so I will be looking for that as well. Thanks for the education.
Joel from San Jose

2010 Itasca Suncruiser 37F
8.1L Chevy Workhorse with Banks PowerPack
2016 CMax Energi Hybrid dinghy

afchap

  • ---
  • Posts: 1171
    • The Empty Nest
Re: Basement AC Output
« Reply #13 on: July 25, 2017, 09:48:08 AM »
OK, now I understand that there is an inside filter that I need to hunt for as well as inside coils.  I was under the impression that all of the cooling coils were right in the AC unit, so I will be looking for that as well. Thanks for the education.

To clarify, all the coils are on the unit ...some visible from outside, and some only exposed to the inside (whether you can actually see them from the inside or not). The changeable paper FILTER is located inside and not necessarily close to the unit.
Paul ... (KE5LXU), was fulltimin', now parttimin'...
'03 Winnebago Ultimate Advantage 40e
'05 Honda Odyssey toad
Escapees, FMCA, SMART, WIT
http://www.pjrider.com

cbeierl

  • ---
  • Posts: 457
Re: Basement AC Output
« Reply #14 on: July 25, 2017, 10:31:13 AM »
OK, now I understand that there is an inside filter that I need to hunt for as well as inside coils.  I was under the impression that all of the cooling coils were right in the AC unit, so I will be looking for that as well. Thanks for the education.

Pages 4-13, 4-14 of the Operator Manual for your coach show the location and specifications for the the house A/C filter.
Chris Beierl
2005 Winnebago Vectra 36RD

JoelP

  • ---
  • Posts: 415
Re: Basement AC Output
« Reply #15 on: July 25, 2017, 09:07:03 PM »
Pages 4-13, 4-14 of the Operator Manual for your coach show the location and specifications for the the house A/C filter.

This explains why I never saw it, I never lifted up the bed.  Thanks for sending that info and link.

Joel
Joel from San Jose

2010 Itasca Suncruiser 37F
8.1L Chevy Workhorse with Banks PowerPack
2016 CMax Energi Hybrid dinghy

 

Hosted by Over The Network