Hard start kit for 2-stage scroll compressor

[AZJeeo]

I have the following:
Bryant Preferred Series, 18 Seer, Model 167A
Prod# 167ANA048000DAAA
Model# 167ANA048-A

According to paperwork it has a 2 stage scroll compressor.

I was all ready to purchase a 5-2-1 Hard start kit CSRU3 or a Kickstart KS1 (leaning toward CSRU3) when I ran across this Kickstart Training Manual - I can't post the link b/c I'm new. Basically it said Kickstart can be put on almost all compressors except two-stage compressors (soft start, variable speed etc.).

Is the CSRU3 also not used on two stage compressors? Google isn't helping me much..... If I can't use a 5-2-1 kit, what can be used to assist start up?

I mostly wanted to help it start easier and extend it's life.

Thanks!!

edit: I emailed cpsproducts, the manu. for 5-2-1 CSRU3 but I've read they are hit or miss for getting back to people with questions.

[kdean1]

Site rules prohibit giving advice for DIY, which includes part numbers or technical information. You should have your contractor make the choice and be responsible for it.

[Mr Bill]

I wished these things were called what they should be called "START ASSIST" 5-2-1 calls theirs "Compressor Saver" have they ever proved that this product will extend the life of a compressor? back in the day when we had lots or recips with TEV's I could understand the use of a "start assist" but now with all the high torque scrolls do we really need them? How many mfg's today still use a "start assist" in their new conventional home equipment?

[Restaurant Mech]

Honestly if you think you need a hard start on that unit it's time for professional service.
Because it's either got a bad capacitor or it's not set up properly.
And adding a hard start is only going to compound the problems later. This isn't a 1980s unit with a reciprocating compressor and a hard shut off txv.

[VTP99]

Only time I might consider one is if a hard shutoff TXV is in play.

[HeyBob]

Sorry, this is not a DIY site. Please call a contractor. If you are a "New" Technician, please apply for professional membership then we can assist you.