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Old 02-23-2010, 06:53 PM   #16
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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?

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Old 02-23-2010, 07:07 PM   #17
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Heat Pump, is it performing within spec?


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Originally Posted by dawktah View Post
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.
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Old 04-01-2010, 01:56 PM   #18
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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.
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Old 04-01-2010, 04:03 PM   #19
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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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Old 04-01-2010, 04:36 PM   #20
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Heat Pump, is it performing within spec?


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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.

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