Heat Pump, is it performing within spec?

ChrisDIY · 02-23-2010, 06:53 PM

While working on the additional return into closet I noticed that when the unit reversed I hear a lot of gurgling and swishing. Is this a sign I am under-filled on refrigerant?

--Chris

**beenthere** · 02-23-2010, 07:07 PM

Quote:

Originally Posted by dawktah

While working on the additional return into closet I noticed that when the unit reversed I hear a lot of gurgling and swishing. Is this a sign I am under-filled on refrigerant?

--Chris

No, its common.

ChrisDIY · 04-01-2010, 01:56 PM

Short of doing a Manual J is there any "test" to determine if unit is properly sized? I know every house is different. The North half has a Century RSC1230 which I believe is a 2.5 ton. If I replace 1 for 1 I'm stuck at 15 SEER. What will happen going to a 3 ton 18 SEER?

When we took possession we only ran unit in cooling mode maybe a month and I cannot remember how it performed.

**beenthere** · 04-01-2010, 04:03 PM

Wait for one of your hottest days and see if it runs continuous, or cycles on and off. If it cycles on and off, its over sized.

Best thing to do is a load calc. And see what size you need.

An over sized unit on under sized duct work can make a lot of noise.

ChrisDIY · 04-01-2010, 04:36 PM

Quote:

Originally Posted by beenthere

Wait for one of your hottest days and see if it runs continuous, or cycles on and off. If it cycles on and off, its over sized.

Best thing to do is a load calc. And see what size you need.

An over sized unit on under sized duct work can make a lot of noise.

Argh! I'm kinda stuck beyond that. It was disconnected last fall for the hydronic air-handler and is R-22. Everything to be installed is the R410A. The unit that is still running is the one we were talking about originally. It's a 3 ton and I will see how it runs in late July.

My HVAC guy has taken ill and I am trying to do this on my own and I'm not an HVAC contractor.

02-23-2010, 06:53 PM	#16
ChrisDIY Still going... Join Date: Feb 2010 Location: Indianapolis Area Posts: 888 Blog Entries: 19	Heat Pump, is it performing within spec? While working on the additional return into closet I noticed that when the unit reversed I hear a lot of gurgling and swishing. Is this a sign I am under-filled on refrigerant? --Chris

04-01-2010, 01:56 PM	#18
ChrisDIY Still going... Join Date: Feb 2010 Location: Indianapolis Area Posts: 888 Blog Entries: 19	Heat Pump, is it performing within spec? Short of doing a Manual J is there any "test" to determine if unit is properly sized? I know every house is different. The North half has a Century RSC1230 which I believe is a 2.5 ton. If I replace 1 for 1 I'm stuck at 15 SEER. What will happen going to a 3 ton 18 SEER? When we took possession we only ran unit in cooling mode maybe a month and I cannot remember how it performed. __________________ --Chris the DIY Guy Still going, on Ibuprofen...

04-01-2010, 04:03 PM	#19
beenthere An old Tradesmen Join Date: Oct 2008 Location: PA Posts: 19,069	Heat Pump, is it performing within spec? Wait for one of your hottest days and see if it runs continuous, or cycles on and off. If it cycles on and off, its over sized. Best thing to do is a load calc. And see what size you need. An over sized unit on under sized duct work can make a lot of noise.

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Heat Pump, is it performing within spec?