Charging a Heat Pump at Start up or in the Winter Time! What you need to Know!

This is how to charge a new R-410A heat pump system in the middle of winter. An overview of the superheat process is explained and examined to see if you can use it to charge since the liquid is going through a piston in heat pump mode. Refrigerant weights per lineal foot of lineset are discussed for liquid and vapor sizes.

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ACSERVICETECH

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[JourneyJustice]

Brother, thank you for this video. People don't understand how much science is behind all this. Hats off.

[jimbola]

I'm very impressed with your work acservicetech!!!! I drive OTR I watch your work over and over  I wish I had your knowledge, OTR is very tiring! and I love working with my hand's! thank you so much for sharing! people I know won't share they act like it is rocket science! but when I show what I have learned over the year's from you they are stunned.

[Brnstrmr]

This isn't how to charge in the winter. It's how much to add when changing line lengths.

[mrd]

You are so good teaching AC . I am so graceful.. Tks

[matthewedwardsnyder]

Should we be adding the refrigerant in liquid or vapor state during the winter time and should we be adding it in to the discharge line or into the true suction line?

[davidashcom]

Sir you cannot check the superheat of that unit like that. Your probe must be on an actual suction line. The pipe you are attached to has no refrigerant flowing through it, it is for checking pressure only.

[shggydg]

Hi,
When compensating for additional lineset length, do you add additional refrigerant based on the OD of only the larger (suction) line or for both lines? I have 1 1/8" suction and 3/8" liquid line. Would I add only for add'l length of 1 1/8" or for that PLUS the 3/8" suction line length?
Thanks!

[vukknezevic]

I have this in my place, i have hot water in the sink but only mild in the tub? Help me! Thanks

[mark.r]

So in cooling mode, red hose to liquid line and blue hose to suction line as usual. But in heat mode now red hose to 3/4 line where does blue hose go?
In both modes your low side always need to be higher than 32F correct? Thanks.

[heatncool]

Replaced evaporator coil. After nitrogen leak test and pulling vaccum to around 500 microns. I charged it up according to nameplate. 11 lb 4 oz. Added 5 oz extra for long lines. It is split heat pump. I checked delta t on cooling. 18. On heating it took a while to heat up but got to 17 in 7 minutes or so. It went smoothly and I said my goodbyes to the customer and that id be out in 5 minutes. When I get back it's still running on heat and pressure are 500 or tetard on low and 400 on high. (Reverse refrigerant flow ) my heart sank at first. But I see i needed to use the true suction port on heating instead of the liquid line? Although sometimes I checked before it read the same? Also ambient was 65

[schpanker]

I see that you are connected to the common port. Is it possible to charge the system through the common port in cooling mode? I'm thinking of using stubby gauges instead of hoses to save refrigerant when checking the system and would like to hook up the charging hose to the common port when needed.

[richgallagher]

So how do you check the charge on a heat pump in winter

[joshuameadows]

You have the liquid line hose on the suction line because thats now your discharge line because your in heat mode. So in effect that now somewhat turns into you liquid line in cooling mode. Am i somewhat understanding it? Do you always hook up your guages like that in heat mode.

[acelookrenos]

Hi Craig
Iv got a quick question
There is a mini split system r410a on heating mode the discharge line goes up 690 psig and actual temperature of 62 Celsius. There is no other valve to connect my hose to except vapor(discharge on heating) question is that 690psig isn't it a little higher than normal? What's wrong with unit then?

[larsonhomeinspection]

How often do you have to adjust the TXV or adjust the charge based on superheat on a new installation?

[waynemiles]

What are some rule of thumbs when servicing old heat pumps in winter mode to check the charge? Pressures should be? Indoor temp. Split? Anything would be helpful, thanks.

[phillipjoy]

In heat mode could you hook the high side gauge to the liquid line instead of the discharge line? Great videos

[seanmcdermott]

Would you consider doing a lesson on the 30 + rule when using the PT Chart when measuring head pressure on a low SEER unit ? I've heard of it before but never had to apply it in the field yet . Thanks again BroOski

[esco]

Would low Freon make the heat pump short cycle in heating mode ?