Author Topic: Heat pump performance in cold weather.  (Read 8803 times)

Offline jumptrout51

  • Technician
  • Member Since: Nov 2007
  • Posts: 1879
  • Country: us
    • Buy me a beer through paypal
Re: Heat pump performance in cold weather.
« Reply #10 on: February 14, 2013, 02:55:37 PM »
To check your refrigerant charge on a R22 hp you would use the sucking port using your blue gauge.
Not the suction port on the primary service valve.
With the unit set for heat and running,the suction pressure would be equivalent to the outside ambient temperature plus or minus 3 degrees. EXAMPLE; 40 degree pressure outside temp would be 37-43 degrees.
That would be a good charge.
If variable is lower,add refrigerant.
Is this a orifice delivery system or a thermostat expansion valve?
Take a Kid fishing.

Offline jimbo6679

  • VIP Member
  • Member Since: Jun 2010
  • Posts: 109
Re: Heat pump performance in cold weather.
« Reply #11 on: February 14, 2013, 08:35:25 PM »
Most older heat pumps would cease operating when ambient was down to 30.    New units have a wider operating range.

First, do you have your EPA card to touch R22?   They take a VERY dim view if you do not.  Do you have a recovery machine?      Don't take offense if you are up to speed....  I just throw this out for everyones info.
Now,  this is not shade tree mechanics, where you just shove a little R134 into your car and come back next summer.    "fiddling" with a heat pump will get you into uncharted trouble.   You need to have proper equipment, and based on the data plate and install manual for your unit, determine what the proper subcooling should be based on house temp and outdoor ambient.    Adjust charge IF NECESSARY.

Offline lesguns

  • Technician
  • Member Since: Aug 2011
  • Posts: 133
  • Country: us
Re: Heat pump performance in cold weather.
« Reply #12 on: February 14, 2013, 11:05:21 PM »
ground source is the best for heat pumps but real expensive. try 1500w infared heaters for xtra aux. just a thought.

Offline def

  • VIP Member
  • Member Since: Feb 2013
  • Posts: 95
  • Country: us
  • I'll fix anything...sometimes, I'm successful.
Re: Heat pump performance in cold weather.
« Reply #13 on: February 15, 2013, 09:08:42 AM »
Most older heat pumps would cease operating when ambient was down to 30.    New units have a wider operating range.

First, do you have your EPA card to touch R22?  No EPA thing but, I do have a valid passport They take a VERY dim view if you do not.  Do you have a recovery machine? No, but I do have one of those stair stepper machines that I exercise on every morning,      Don't take offense if you are up to speed....  I just throw this out for everyones info.
Now,  this is not shade tree mechanics, where you just shove a little R134 into your car and come back next summer. I usually just let system pressure suck the refrigerant into the low pressure port...I don't have to shove it.     "fiddling" with a heat pump will get you into uncharted trouble. You need to have proper equipment, and based on the data plate and install manual for your unit, determine what the proper subcooling should be based on house temp and outdoor ambient.    Adjust charge IF NECESSARY.

You mention fiddling...I don't play violin but do play accordion...does that help?  :tiphat:

Of course, I'm being facetious (silly) here.  :rofl:  After a bit of consideration, I think I'll leave the heat pump alone.

But, I will clean the coil and install the UV lamp. I need to find switched 120VAC in the air handler and tap into that for the UV power when the blower is running. Any thoughts?  :thankyou:

 :popcorn:
I used to repair RADAR then they discontinued vacuum tubes. Pity

Offline def

  • VIP Member
  • Member Since: Feb 2013
  • Posts: 95
  • Country: us
  • I'll fix anything...sometimes, I'm successful.
Re: Heat pump performance in cold weather.
« Reply #14 on: February 15, 2013, 09:21:44 AM »
ground source is the best for heat pumps but real expensive. try 1500w infared heaters for xtra aux. just a thought.

I have been contemplating a ground source system should I ever build another house. I am now thinking about another house and a heated swimming pool, as well. Ground source would be good for heating the pool, as well.  ::)

Now, I have to find a way to balance the load between the pool, two houses, domestic hot water demands and the phases of the moon.  8)

I don't know if I can balance a variable load with the equipment that is currently available. I may have to design something myself and fabricate some purpose built valves to distribute coolant...more work to be done. I have plenty of real estate for the ground source heat exchange plumbing but have determined that moon phases need not be considered.   :)

And yes, your suggestion of some auxiliary infrared heaters is appropriate and appreciated.   :thanks:

I used to repair RADAR then they discontinued vacuum tubes. Pity

Offline JWWebster

  • Technician
  • Member Since: Jan 2008
  • Posts: 8781
  • Country: us
  • SublimeMasterJW
    • Buy me a beer through paypal
    • JW's Sublime Appliance Advice
Re: Heat pump performance in cold weather.
« Reply #15 on: February 15, 2013, 11:58:00 AM »
I know a guy who added another wall 1 foot from his existing wall on the south facing side of the house. He installed a thermostatically controlled solar driven fan to pump the hot air inside the false wall to inside the house. Cut his power bill down to nothing in winter.
May the hinges of our friendship
        never grow rusty.

About the icons: The beer is tip link, if a tech saves ya some money buy em a 6 pack. The small green square=personal message. The green dot is a link to my web page on appliance repair and other general BS I love to post. The letter sends me email.
I love fan letters! LOL

Offline def

  • VIP Member
  • Member Since: Feb 2013
  • Posts: 95
  • Country: us
  • I'll fix anything...sometimes, I'm successful.
Re: Heat pump performance in cold weather.
« Reply #16 on: February 15, 2013, 12:09:48 PM »
I know a guy who added another wall 1 foot from his existing wall on the south facing side of the house. He installed a thermostatically controlled solar driven fan to pump the hot air inside the false wall to inside the house. Cut his power bill down to nothing in winter.

Mr. Webster, This sounds like an excellent idea. Does this fellow have any details? Materials, dimensions, etc.? Where is he located geographically? More details please...

 :thanks:

 :popcorn:
I used to repair RADAR then they discontinued vacuum tubes. Pity

Offline JWWebster

  • Technician
  • Member Since: Jan 2008
  • Posts: 8781
  • Country: us
  • SublimeMasterJW
    • Buy me a beer through paypal
    • JW's Sublime Appliance Advice
Re: Heat pump performance in cold weather.
« Reply #17 on: February 15, 2013, 04:59:14 PM »
He lives on Fowl river near Belengrath gardens. We have mild winters here. I think the house was featured in a newspaper article but I cannot find it. You ever hear of a beer can heater?
May the hinges of our friendship
        never grow rusty.

About the icons: The beer is tip link, if a tech saves ya some money buy em a 6 pack. The small green square=personal message. The green dot is a link to my web page on appliance repair and other general BS I love to post. The letter sends me email.
I love fan letters! LOL

Offline def

  • VIP Member
  • Member Since: Feb 2013
  • Posts: 95
  • Country: us
  • I'll fix anything...sometimes, I'm successful.
Re: Heat pump performance in cold weather.
« Reply #18 on: February 15, 2013, 05:20:03 PM »
He lives on Fowl river near Belengrath gardens. We have mild winters here. I think the house was featured in a newspaper article but I cannot find it. You ever hear of a beer can heater?

Are we talking about Fowl River near Bayou La Batre? Heck, I'll just ride the BMW down there and visits with him. Does he carry a gun? Is he...ya know....right? Is there any danger?
I used to repair RADAR then they discontinued vacuum tubes. Pity

Offline def

  • VIP Member
  • Member Since: Feb 2013
  • Posts: 95
  • Country: us
  • I'll fix anything...sometimes, I'm successful.
Re: Heat pump performance in cold weather.
« Reply #19 on: February 03, 2014, 10:57:06 PM »
If anyone is interested,  I have a new 40 lb tank of R22. Let me knkw if you would like to trade for it.

Otherwise! I'll just put in the trash.
I used to repair RADAR then they discontinued vacuum tubes. Pity

 

Heat Pump Defrosting

Started by Icehouse

Replies: 3
Views: 5289
Last post December 27, 2008, 03:57:05 AM
by Icehouse
Heat Pump Electrical Componet Check

Started by Icehouse

Replies: 1
Views: 7261
Last post February 25, 2009, 08:00:45 AM
by thermodix
Goodman Company Reannounces Recall of Air Conditioner/Heat Pump Units

Started by AJ

Replies: 0
Views: 5055
Last post December 08, 2009, 03:52:04 PM
by AJ
Tempstar Heat Pump not running but Air handler is

Started by lgmccoy1

Replies: 4
Views: 6363
Last post November 19, 2010, 06:16:05 AM
by jumptrout51
Tempstar heat pump won't initiate defrost cycle

Started by lgmccoy1

Replies: 13
Views: 10459
Last post December 24, 2010, 12:53:31 PM
by jumptrout51
Carrier Heat pump OAT 25HPA

Started by chrissymustang

Replies: 4
Views: 5794
Last post February 02, 2011, 05:21:06 PM
by chrissymustang