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

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

Reply
 
Thread Tools Search this Thread Display Modes
Old 01-08-2012, 02:12 PM   #1
Newbie
 
Join Date: Jan 2012
Location: Diamond, NE Ohio
Posts: 4
Share |
Question

rechargeing heat pump


I am replacing the coil in the air handler of my comfortmaker heatpump. My friend, who is a hvac guy, is helping me out with this job. He does not work on heatpumps very much and is not sure how to charge,(r22), the unit when the temperature is at 30 to 40 degrees. Can someone plese advise me on the proper procedure to charge the unit in cold weather? I live in N E Ohio. Thanks.


Last edited by mole; 01-08-2012 at 03:23 PM. Reason: more detail
mole is offline   Reply With Quote
Old 01-08-2012, 02:57 PM   #2
Member
 
biggles's Avatar
 
Join Date: Jan 2008
Location: Long Island
Posts: 3,613
Default

rechargeing heat pump


so the coil is installed and your running a vacuum...on the entire system microns are good 500/250 or 2 joints where brazed right...? your hoses are on the condenser at the liquid and suction ports and the guages are in a vacuum.UNIT IS OFF...connect the middle hose to the freon cyclinder "purge" the middle hose" FLIP THE CAN" open the hi side and let the liquid line fill up till the entire show equalizes right onto that suction guage.now the system is positive liquid line is full.upright the can shut the hi side guage....start the unit in heating and let it run check the temp on that suction line should be running 120F-130F.sub cooling and superheats others will kick in on those to fine tune it.i good running HP you shouldn't be able to grab the suction line in the heating mode....no matter what the freon is....

biggles is offline   Reply With Quote
The Following User Says Thank You to biggles For This Useful Post:
mole (01-08-2012)
Old 01-08-2012, 03:18 PM   #3
AKA HVACTECHFW
 
Join Date: Nov 2010
Location: NE Indiana
Posts: 2,317
Blog Entries: 1
Default

rechargeing heat pump


weigh the charge in......
__________________
IT IS WHAT IT IS
hvactech126 is offline   Reply With Quote
The Following User Says Thank You to hvactech126 For This Useful Post:
mole (01-08-2012)
Old 01-09-2012, 11:53 AM   #4
Newbie
 
Join Date: Jan 2012
Location: Diamond, NE Ohio
Posts: 4
Default

rechargeing heat pump


thanks for the advice on charging the unit. When my coil went out I had two different hvac suys come out. The first one just eyeballed the outside unit, put the gages on and determined that i had a leak bbut he didnt determine where the leak was. He never even came into the house. He did charge the unit which only lasted two days. To charge he placed the r22 tank into a bucket of hot water and proceeded to charge the unit. Is this something that is advised? Is turning the tank upsidedown a better way? Im new to the site so hope i am doing this proper. thanks from mole.
mole is offline   Reply With Quote
Old 01-09-2012, 12:09 PM   #5
Part of the Clover Leaf
 
Join Date: May 2011
Location: NW Burbs of Detroit Mi.
Posts: 1,107
Default

rechargeing heat pump


you should not attempt using hot water. it takes a trained and experienced eye to make sure the can does not blow the rupture relief. If that happens you could suffer blindness and sever frost burns.

On top of that you could get fined for not having a refer handling card issued by an officially sanctioned testing authority.
hvac5646 is offline   Reply With Quote
The Following User Says Thank You to hvac5646 For This Useful Post:
mole (01-09-2012)
Old 01-09-2012, 12:53 PM   #6
Newbie
 
Join Date: Jan 2012
Location: Diamond, NE Ohio
Posts: 4
Default

rechargeing heat pump


The water was actually warm, probably 80 to 90 degrees. What about the turning of the tank upside down? My friend , a hvac guy, will be doing this for me. He just has expressed to me that he didnt know how to charge the unit when the weather outsde is cold. He is licensed.

Last edited by mole; 01-09-2012 at 01:06 PM.
mole is offline   Reply With Quote
Old 01-09-2012, 01:03 PM   #7
Part of the Clover Leaf
 
Join Date: May 2011
Location: NW Burbs of Detroit Mi.
Posts: 1,107
Default

rechargeing heat pump


unless you have an EPA card I don't think you should attempt this. Inverting a drum of gas poses dangers of it's own.

And what about the coil? where are you on that?
hvac5646 is offline   Reply With Quote
Old 01-09-2012, 07:45 PM   #8
Newbie
 
Join Date: Jan 2012
Location: Diamond, NE Ohio
Posts: 4
Default

rechargeing heat pump


We had to reorder it. They had it, but someone ran into it with a tow motor. My bad luck. My hvac friend has installed plenty air conditioner units but he does that in summer months.Thats why he is a little apprehensive about doing this in winter.

Last edited by mole; 01-09-2012 at 07:49 PM.
mole is offline   Reply With Quote
Old 01-09-2012, 08:02 PM   #9
Member
 
biggles's Avatar
 
Join Date: Jan 2008
Location: Long Island
Posts: 3,613
Default

rechargeing heat pump


put the cylinder in a warm 5gallon pale...purge the middle hose and open that hi side guagethe system isn't going to take 30lbs once the liquid line fills up the condenser will pressurize with gas along with the liquid expanding thru the air handler........it isn't brain surgery or put the tank in the basement next to the boiler and run a hose out to the condenser.....
biggles is offline   Reply With Quote
Old 01-09-2012, 08:51 PM   #10
An old Tradesmen
 
Join Date: Oct 2008
Location: PA
Posts: 24,501
Default

rechargeing heat pump


The outdoor unit should have a data tag with the factory charge. that charge is good for the most common matching coil, and 15 foot of line set. have him charge by weighing in that amount.

beenthere is offline   Reply With Quote
The Following User Says Thank You to beenthere For This Useful Post:
hvactech126 (01-09-2012)
Reply


Thread Tools Search this Thread
Search this Thread:

Advanced Search
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
New heat pump wiring question jmedenf HVAC 3 10-14-2011 06:26 PM
Using Gas heat during Defrost mgroves HVAC 15 12-18-2010 05:51 PM
Need help from control guys or heat pump gurus (reversing heat pump defrost cycle) pomelo HVAC 11 03-08-2010 08:13 PM
New Install - Heat Pump Woes... mark1210 HVAC 7 03-07-2010 09:14 AM
Comparison and Heat Pump Selection help... ChrisDIY HVAC 7 03-06-2010 08:34 PM




Top of Page | View New Posts

Copyright © 2003-2014 Escalate Media. All Rights Reserved.