?? about restrictions.

[HVACNeophite]

So I recently graduated tech school and one of peers called and asked about restrictions. He said that a restriction could also cause suctions pressure to rise???? I dissented with him by stating a restriction will give you low suction pressure whether its in the liquid line or suction line. Any advice anyone? thanks.

[beenthere]

He needs to go back to class.

The restriction would have to be after the vapor access fitting to have a pressure rise on the vapor line.

Unless he was referring to heating mode, then it wouldn't be the suction line anymore.

[HVACNeophite]

He needs to go back to class.

The restriction would have to be after the vapor access fitting to have a pressure rise on the vapor line.

Unless he was referring to heating mode, then it wouldn't be the suction line anymore.

Now you're referring to a heat pump right? Cause you dont typically find those up here in the north. Matter fact my school just added a heat pump class after I graduated.

[Joker]

He needs to go back to class.

The restriction would have to be after the vapor access fitting to have a pressure rise on the vapor line.

Unless he was referring to heating mode, then it wouldn't be the suction line anymore.

What if the restriction is in the condenser unit?

Then it would cause the low pressure to back up giving a high low pressure.

I have seen this with my own eyes. Not very common problem. Most restrictions are at the metering device.

[skippedover]

neophyte, you've got enough posts. You should now apply for pro membership. On the pro side, you can ask all the questions you want and will get a lot more detailed answers than we're allowed to provide on the public open forum. This is a great place to learn and you're almost to the right location. Just move to the pro side and you'll have arrived!!

[HVACNeophite]

neophyte, you've got enough posts. You should now apply for pro membership. On the pro side, you can ask all the questions you want and will get a lot more detailed answers than we're allowed to provide on the public open forum. This is a great place to learn and you're almost to the right location. Just move to the pro side and you'll have arrived!!

Ok, Thanks. This is really a conducive website for serious techs!!!!!!

[beenthere]

What if the restriction is in the condenser unit?

Then it would cause the low pressure to back up giving a high low pressure.

I have seen this with my own eyes. Not very common problem. Most restrictions are at the metering device.

I said it would have to be after teh access fitting to cause a high vapor pressure.

[Joker]

I said it would have to be after teh access fitting to cause a high vapor pressure.

I guess the first statement threw me off! LOL

Sorry for not reading the whole thing before commenting.