Drainage Under Packaged Heat Pump - HVAC - DIY Chatroom Home Improvement Forum


Go Back   DIY Chatroom Home Improvement Forum > Home Improvement > HVAC

CLICK HERE AND JOIN OUR COMMUNITY TODAY...IT'S FREE!

Reply
 
Thread Tools Display Modes
Old 12-22-2011, 02:00 PM   #1
Newbie
 
Join Date: Nov 2011
Posts: 9
Rewards Points: 10
Default

Drainage under packaged heat pump


I recently had a new Trane packaged heat pump installed, and the heat ducts go at an angle down into my crawl space. The heat pump sits on 4 adjustable plastic legs which elevate it about 3" off the pad. To help me keep out critters from coming in under the heat pump, the installer screwed on a strip of 3"sheet metal edging running down from the bottom of the heat pump to cover the spacing between the bottom edge of the heat pump and the pad, around the 2 sides and front of the heat pump. The back of the heat pump has an insulated shield over the ducts going into the crawl space. However, I have been having a problem with some of the heat vents inside having a wet plaster smell, as well as the same smell in the return air duct opening inside. Does anybody know if it is possible that the metal edging covering the edges between the bottom of the heat pump and the pad is causing a drainage problem and/or possibly an overheating problem? Does there have to be an open space or openings beneath the bottom of the heat pump and the pad?

Advertisement

salonica is offline   Reply With Quote
Old 12-23-2011, 04:45 PM   #2
Newbie
 
Join Date: Nov 2011
Posts: 9
Rewards Points: 10
Default

Drainage under packaged heat pump


I guess nobody knows if the space between a packaged heat pump and the pad must be left open or can be completely enclosed?

Advertisement

salonica is offline   Reply With Quote
Old 12-23-2011, 06:29 PM   #3
AKA HVACTECHFW
 
Join Date: Nov 2010
Location: NE Indiana
Posts: 2,366
Rewards Points: 1,096
Blog Entries: 1
Default

Drainage under packaged heat pump


a few pictures might help us to see exactly what you are asking. I'm certainly not following what you are asking.
__________________
IT IS WHAT IT IS
hvactech126 is offline   Reply With Quote
Old 12-23-2011, 08:09 PM   #4
Newbie
 
Join Date: Nov 2011
Posts: 9
Rewards Points: 10
Default

Drainage under packaged heat pump


Thanks for your response. Unfortunately, I don't have the picture sending capability. It is a new Trane packaged heat pump, which sits on 4 plastic feet, which raise it about 3 inches off the pad outside. We have screwed a 3"' approx. wide strip of sheet metal around the sides and front of that 3"" space between the heat pump bottom and the pad, (to try to keep critters from squeezing under the heat pump and into the crawl space, by squeezing around the ducts or between the ducts.) My question is will that cause rainwater not to be able to get out from under the heat pump and accumulate, or maybe go back down into the ducts or crawl space? And/or could enclosing it underneath like that cause anything to overheat inside? i.e., does it need that open space beneath for heat to come out? Has anyone ever put a metal strip around the bottom of their packaged heat pump to keep out mice and chipmunks (which abound in my yard and are attracted to warmth)? The 8 or 10 packaged heat pumps I've seen in neighborhoods don't have the bottom enclosed roundabout, you just see the plastic feet holding up the unit. (but maybe they have a better fitted opening around the ducts than I do.) I am trying to figure out if this was the wrong thing to do to enclose under a packaged heat pump for some reason, or could be causing moisture or overheating problems, as there are some odors in the ducts. Has no one else ever had mice etc. try to squeeze in under their outdoor packaged heat pump into their crawl space?
salonica is offline   Reply With Quote
Old 12-23-2011, 08:25 PM   #5
Member
 
Join Date: Nov 2011
Location: Hartfield VA
Posts: 27,747
Rewards Points: 610
Default

Drainage under packaged heat pump


I live in the south so I've seen hundreds of heat pumps but not one of them has the sheet metal your taking about.
The ducts and the area where it goes into the foundation should have been sealed up and nothing should be able to get in there.
Now that someone has made that enclosure if thay can get in there it would be a nice sheltered spot for them to move in. If it was left open they would have no intrest in a open area to build a nest.
An no the heat does not blow out in that area. It blows out the back.
The bottom of any unit Ive seen is soild so there no chance that odor is coming from there.

Last edited by joecaption; 12-23-2011 at 08:31 PM.
joecaption is offline   Reply With Quote
The Following User Says Thank You to joecaption For This Useful Post:
ben's plumbing (12-23-2011)
Old 12-23-2011, 08:53 PM   #6
Member
 
Join Date: Oct 2011
Location: pa
Posts: 4,620
Rewards Points: 2,554
Default

Drainage under packaged heat pump


Quote:
Originally Posted by salonica View Post
I recently had a new Trane packaged heat pump installed, and the heat ducts go at an angle down into my crawl space. The heat pump sits on 4 adjustable plastic legs which elevate it about 3" off the pad. To help me keep out critters from coming in under the heat pump, the installer screwed on a strip of 3"sheet metal edging running down from the bottom of the heat pump to cover the spacing between the bottom edge of the heat pump and the pad, around the 2 sides and front of the heat pump. The back of the heat pump has an insulated shield over the ducts going into the crawl space. However, I have been having a problem with some of the heat vents inside having a wet plaster smell, as well as the same smell in the return air duct opening inside. Does anybody know if it is possible that the metal edging covering the edges between the bottom of the heat pump and the pad is causing a drainage problem and/or possibly an overheating problem? Does there have to be an open space or openings beneath the bottom of the heat pump and the pad?
I never heard of anyone adding anything to the bottom of these units for the purpose of what you are discribing...that may be your problem....
ben's plumbing is offline   Reply With Quote
Old 12-23-2011, 09:07 PM   #7
Newbie
 
Join Date: Nov 2011
Posts: 9
Rewards Points: 10
Default

Drainage under packaged heat pump


THANKS for your kind information! Sounds like probably I should take the metal strip off. The brick was knocked out irregularly and too large around the ducts, which go downward at an angle and thru the wall. I tried and tried to find an installer that could make a metal shield going from the back of the unit all around the back ducts and attaching to the wall all around the opening but they said they couldn't figure out how to make one, because of the slanted ducts into the opening. They also kept saying don't brick the opening tighter up around the ducts opening before they come to install it, because they might have to change the opening to install it. Then after they installed it, they say if I get it bricked up now (now pretty hard to do with the heat pump and a small overshield screwed and caulked in place that only goes down to the ground level, not down to the opening below ground level), the brick might have to be knocked out again if changes need to be made. ???? So I am thinking maybe I can get the sides of the brickwork opening made straight, and maybe someone can figure out how to insert a metal wall part, rather than brick, behind the duct area, maybe with some pressure treated wood posts in the opening to fasten the metal to, around the ducts so they could tear that out if they had to sometime. Then maybe they could fasten a shield to that to go all the way around the ducts to the wall. (They all say that critters can also get through BETWEEN the 2 ducts too, where they seem to think it is apparently almost impossible to put something between the ducts that would keep them out of the crawl space!) It seems nobody has any solution! Apparently it went for years with the last one this same way, before I was dumb enough to buy this house, hence the inherited critter problem. I guess most people don't have so many determined chipmunks, etc. in their area.
salonica is offline   Reply With Quote
Old 12-24-2011, 05:14 AM   #8
An old Tradesmen
 
Join Date: Oct 2008
Location: PA
Posts: 26,457
Rewards Points: 4,560
Default

Drainage under packaged heat pump


Model number of unit would help.

Blocking off the underside of the discharge end shouldn't be causing a problem.
beenthere is offline   Reply With Quote
Old 12-24-2011, 08:07 AM   #9
Member
 
Join Date: Nov 2011
Location: Hartfield VA
Posts: 27,747
Rewards Points: 610
Default

Drainage under packaged heat pump


These metal covers are made all the time On packaged units like yours.
Without some pictures to try and see exactly why they think it can not be done were going to be at a loss.
The ones I've seen were made in two pieces, one in the shape of a letter C and the bottom one was just a flat sheet with the two ends bent up so it could be attached to the other piece to form what would amount to a rectanguler tube. The whole thing get screwed to the heat pump and the brick wall.
joecaption is offline   Reply With Quote
Old 12-24-2011, 08:08 AM   #10
Member
 
Join Date: Feb 2010
Posts: 128
Rewards Points: 75
Default

Drainage under packaged heat pump


A hood or shroud is standard on any heat pump installation around here, you certainly won't pass your inspection without one. If it is constructed and sealed properly, NOTHING should find it's way into your crawl space, rainwater, critters.....nothing. If you can verify that rainwater is intruding through that hole in the wall you need to call the contractor back out to fix it.
brandonmcginnis is offline   Reply With Quote
Old 12-24-2011, 09:37 AM   #11
Newbie
 
Join Date: Nov 2011
Posts: 9
Rewards Points: 10
Default

Drainage under packaged heat pump


I appreciate your inputs very much. I appreciate Joe's description of how some shrouds are made that go all around the hole from the unit to the wall. It isn't just the discharge (duct?) end that is blocked off, the metal strip goes around the two sides and front. It seemed they couldn't put it across only the back and toward the wall, which I think would have been better. The problem with pictures would be that you can't see anything much. I wouldl have to take the above-ground shroud loose (screws and caulking), and there are some cemented bricks, which go down a little way into the ground under both sides of the 2 side of the shroud, which I guess sooner or later will have to be removed so anyone can replace properly (with metal?) or see what is going on. I have temporarily piled bricks from the inside around the ductwork to keep out the cold, but they are not a very good barrier to critters that can tunnel underground, apparently even from some distance away.

It seems from what has been said here that an all-around shroud to the wall could be done, just that the bigger heating contractors don't want to get involved with that part of selling a heat pump (complications). Especially since it is hard to see and get to what is down there because of the cemented bricks on both sides of the duct on the outside, plus the new screwed on above-ground shroud. And I suppose it will be very expensive to make such a better all-around shroud. Maybe I can find some independent smaller contractor or metal person that can figure out how to do it. The heating contractors hate crawling inside to look at it, and they don't do it. I can't blame them, I guess!

Thanks again for your answers.
salonica is offline   Reply With Quote
Old 12-24-2011, 09:50 AM   #12
Newbie
 
Join Date: Nov 2011
Posts: 9
Rewards Points: 10
Default

Drainage under packaged heat pump


It seems that it is the fact that the bottom part of such an all-around shield would have to go downward at a sharp angle from the heat pump and affix at an angle to the wall that bothers them the most. Apparently if it went straight back they would be more willing to do it.
salonica is offline   Reply With Quote
Old 12-24-2011, 11:30 AM   #13
Member
 
Join Date: Feb 2010
Posts: 128
Rewards Points: 75
Default

Drainage under packaged heat pump


If you paid them to install a package unit they are obligated to do the job correctly. Even if it's hard. Did this install get inspected?
brandonmcginnis is offline   Reply With Quote
Old 12-24-2011, 12:15 PM   #14
Member
 
Join Date: Nov 2011
Location: Hartfield VA
Posts: 27,747
Rewards Points: 610
Default

Drainage under packaged heat pump


I almost never see one that lines up with out having an angle.
It could be the company is new, does not have a metal shop, or there just sending out the wrong person to work on the job.
joecaption is offline   Reply With Quote
Old 12-24-2011, 02:05 PM   #15
Member
 
Join Date: Feb 2010
Posts: 128
Rewards Points: 75
Default

Drainage under packaged heat pump


If they can't build a duct hood on the job sight from a piece of flat metal then they are not prepared to do the job. From the OP's description it sounds like his might be a little tricky, but it still has to be done right.

There are lots of "tricky" parts to this job. If they can't build a hood, it makes me wonder where else they fall short. At least there's not much to botch setting a package unit. If you had told me they installed a split system but couldn't do basic sheet metal work I would really be concerned!

Advertisement

brandonmcginnis is offline   Reply With Quote
Reply


Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off


Similar Threads
Thread Thread Starter Forum Replies Last Post
carrier infinity 50Xt packaged heat pump with infinity thermostat mguillen HVAC 12 12-05-2011 02:42 PM
Heat pump vs. Radiators - Opinions/Recommendations rflail HVAC 7 11-10-2010 10:56 PM
Comparison and Heat Pump Selection help... ChrisDIY HVAC 7 03-06-2010 09:34 PM
New Heat Pump..questions? ddave23 HVAC 4 03-05-2010 06:13 AM
Heat pump vs in floor heat mugen HVAC 5 03-02-2010 09:18 PM




Top of Page | View New Posts