Compatibility: Thermopump R22 and CBX27UH

[WinterQC]

Hi all,

My heat pump uses R22 refrigerant. It is currently connected to a KEEPRITE electrical furnace which needs to be replaced.

A technician from a LENNOX dealer will install a CBX27UH air handler (not a CB27UH) to replace the KEEPRITE. As you know, there are two models available: CBX27HU for R410 refrigerant and CB27UH for R22 refrigerant. The technicain told me that to make my R22 heat pump compatible with the R410 CBX27UH air handler, he will simplly install a valve, it will be ok.

My question is: Is the CBX27UH model (R410) really compatible with my R22 heat pump? Why does not he install a CB27UH for me, that way we are sure there is no problem for compatibility?

Thanks.

[FSHnFRK]

"Why does not he install a CB27UH for me, that way we are sure there is no problem for compatibility?"
You need to be asking your tech that question!

How old is the condensing unit? You should consider replacing all the equipment if it is an old system. If you dont replace it all I would make sure that the indoor equipment will be compatible with a 13 SEER condensing unit when it takes a dump :D

Good Luck

[WinterQC]

"Why does not he install a CB27UH for me, that way we are sure there is no problem for compatibility?"
You need to be asking your tech that question!

How old is the condensing unit? You should consider replacing all the equipment if it is an old system. If you dont replace it all I would make sure that the indoor equipment will be compatible with a 13 SEER condensing unit when it takes a dump :D

Good Luck

Thanks.

My heat pump KENMORE is 9 years old. It works fine.

I decided to replace the furnace (KEEPRITE, 14 years old) beacause the electric elements (15KW) burn 3 winters in a row.

[t527ed]

as long as he changes the valve you will be fine. the r22 blower coil may have been out of stock so rather than wait for it he took the one that they had.......:cool:

blowers and coils are the same only difference is the valve.

[WinterQC]

as long as he changes the valve you will be fine. the r22 blower coil may have been out of stock so rather than wait for it he took the one that they had.......:cool:

blowers and coils are the same only difference is the valve.

Thanks.

I am happy to hear this confirmation. The advantage I can see for installing CBX27 instead of CB27 is that if my heat pump breaks in the future I can buy a R410 heat pump which is automatically compatible with CBX27UH.

Regards.

[t527ed]

Thanks.

I am happy to hear this confirmation. The advantage I can see for installing CBX27 instead of CB27 is that if my heat pump breaks in the future I can buy a R410 heat pump which is automatically compatible with CBX27UH.

Regards.

like i said units are identical except for txv, it would be no harder to conver r-22 model over to r-410 than it would be to convert yours back.;)

[WinterQC]

like i said units are identical except for txv, it would be no harder to conver r-22 model over to r-410 than it would be to convert yours back.;)

Thanks.

What i mean is that next time when I install a new heat pump (R410) I just take away the TXV then they can work seamlesslly together (new heat pump and CBX27).

If I buy a CB27 this time, when I install a new heat pump (R410) in the future, I need to buy a valve.

(I know almost nothing about this subjet).

[FSHnFRK]

In the future if you change the condensing unit to a 410 unit than you will have to replace the TXV again. Keep in mind that when you end up changing the condensing unit it will be at least a 13 SEER unit. Will the coil he is putting in be compatible with a 13 SEER??? That is why in my previous post I asked how old the outdoor unit is and you may want to think about changing it out at the same time with matching equipment.:)
Have a great day!

[t527ed]

In the future if you change the condensing unit to a 410 unit than you will have to replace the TXV again. Keep in mind that when you end up changing the condensing unit it will be at least a 13 SEER unit. Will the coil he is putting in be compatible with a 13 SEER??? That is why in my previous post I asked how old the outdoor unit is and you may want to think about changing it out at the same time with matching equipment.:)
Have a great day!


cb27 coils match up to every unit made by lennox. will not be a problem down the road if you want to replace the outdoor unit.

[RyanHughes]

It is my understanding that it's a bad idea to mismatch brands both for performance and reliability when you are dealing with heat pumps... You may want to have your contractor ensure you it isn't a problem (mismatched coils). It's not uncommon practice, but you have to be careful with warranties as well.

[WinterQC]

In the future if you change the condensing unit to a 410 unit than you will have to replace the TXV again. Keep in mind that when you end up changing the condensing unit it will be at least a 13 SEER unit. Will the coil he is putting in be compatible with a 13 SEER??? That is why in my previous post I asked how old the outdoor unit is and you may want to think about changing it out at the same time with matching equipment.:)
Have a great day!

My outdoor heat pump is 9 years old (Kenmore). I have no idea about 13 SEER for the unit. With this age, do you think it is compatible with a 13 SEER ? Thank you very much.

HEAT PUMP:
Model: ch9530VKC1
Serial: L991923619
Compressor : HP = ?; PH = 1; FLA = ?; RLA = 13.5; LRA = 2.3;
R22

[WinterQC]

cb27 coils match up to every unit made by lennox. will not be a problem down the road if you want to replace the outdoor unit.

Thanks.

In the future, if I change the outdoor unit, I will definitely choose LENNOX.

But for this time, do you think if there are problems if we connect my KENMORE heat pump (R22, 9 years old) with the CBX27 indoor unit ?

I appreciate the replies posted by all of you to answer my questions.

Regards.

[BaldLoonie]

That's a "12 SEER" outdoor unit so with the new TXV air handler you'll be in the 12 range.

[FSHnFRK]

cb27 coils match up to every unit made by lennox. will not be a problem down the road if you want to replace the outdoor unit.

So you are telling me a 13 Seer coil will match up with a 10 or 12 or 17... Condensing unit??? NOT!

[t527ed]

So you are telling me a 13 Seer coil will match up with a 10 or 12 or 17... Condensing unit??? NOT!


coils have no seer:rolleyes:, that blower coil will be a rated match with EVERY unit in the current Lennox line.

every model from the AC13 through the XC21 is rated with that line of coils.

[WinterQC]

coils have no seer:rolleyes:, that blower coil will be a rated match with EVERY unit in the current Lennox line.

every model from the AC13 through the XC21 is rated with that line of coils.


Sorry for asking this question again, but I want to be sure for the money I payed this time:

Do you think if there are problems if my current outdoor KENMORE heat pump (R22, 9 years old) is connected with the new LENNOX CBX27 indoor unit? Thanks a lot.

[RyanHughes]

Yes, the coils aren't matched and aren't designed to work with each other. You could run into uneven pressure problems due to the volumetric difference among the coils. The warranties will be null more than likely as well. A heat pump reverses it's cycle in the winter so the indoor coil becomes the condensor and the outdoor coil becomes the evaporator; this could cause charge issues. Some others may have different advice here, but this is the advice I've gathered here from knowledgable pros being a homeowner with a mismatched system myself. :)

[t527ed]

you had a mismatch before with the keeprite coil and the kenmore unit.

you will still have a mismatch with the new coil, it may or may not be a good match as far as coil volume goes:cool:



only way to know for sure is hook it up and see what happens.

[WinterQC]

Yes, the coils aren't matched and aren't designed to work with each other. You could run into uneven pressure problems due to the volumetric difference among the coils. The warranties will be null more than likely as well. A heat pump reverses it's cycle in the winter so the indoor coil becomes the condensor and the outdoor coil becomes the evaporator; this could cause charge issues. Some others may have different advice here, but this is the advice I've gathered here from knowledgable pros being a homeowner with a mismatched system myself. :)

Thanks.

How about I make sure that I use heat pump only in summer for air conditioning and never use it for heating. Then I use the indoor unit CBX27 (20KW) for heating in the winter.

Do you think this can solve the mismatch problem?

Regards.

[WinterQC]

you had a mismatch before with the keeprite coil and the kenmore unit.

you will still have a mismatch with the new coil, it may or may not be a good match as far as coil volume goes:cool:



only way to know for sure is hook it up and see what happens.

Thanks.

So, how I can know if it is a good match or not? The technician can tell me after ou during the installation?

Regards.

[RyanHughes]

The 20 KW heating would be expensive. You ideally want to be able to use both the heating and cooling from the heat pump. It's hard to tell how it will work since it's not approved by any manufacturer. It may work fine; it may cause problems. I'd be curious to see what your installing contractor thinks. Ask them before they put it in. Regards.

[WinterQC]

The 20 KW heating would be expensive. You ideally want to be able to use both the heating and cooling from the heat pump. It's hard to tell how it will work since it's not approved by any manufacturer. It may work fine; it may cause problems. I'd be curious to see what your installing contractor thinks. Ask them before they put it in. Regards.

The efficiency is an issue but is not that important. The reason is that we are in Quebec and the heat pump is rarely enough for heating in the winter from December to March. So we need the heating unit in most of time during the winter. Maybe next time when I change the heat pump I will choose a stronger one. Thanks