stumped! and not too proud to admit it
i have an issue that has me baffled for the first time in years....
any help would be greatly appreciated.
split system 2 ton.... evaporator is and old apollo hydro unit
no problem with the hydronic heat...
anyway....replaced condensing unit ( dead comp )
held vacuum overnight.
charged unit by weight.r22
turned system on. all should be well...but not
evap has hisssing sound and unit runs 49psi low and 178 high
added a few oz r22. pressures rise and then fall to exact as before
my question is.... is it possible to only have a leak in one direction? ( positive pressure )
or do i have another issue?
again.... any help would be greatly appreciated
Are you in the trade? Is there someone at work you can ask for help?
Pressures alone are not going to help us figure out your problem. How old is the evaporator? Txv or piston? Is the hydronic coil a separate coil or one coil with both water and DX? How many CFM are your moving across your air handler.. These are the questions you need answers to, to begin troubleshooting. THere are more but I won't ask them now..
Unfortunately, We can't go into too much detail in an open forum. Good luck.
evap is probably 15 years old...;piston( installed new piston w/ condens unit). and separate coils. air blows like the wind.... no need to measure cfm.
and yes i am in the trade. nccr & aces cert 10 yrs exp.
Coil is to old for your new condenser. You have a mismatch.
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Since when is wind a measurement in HVAC? I must have missed that..The wind is blowing slowly here today!
I don't know what them certifications are but THey don't teach you to insure proper airflow before charging equipment?
IF you would like you can get your post count up and apply for Pro Membership but that is not going to help you right now.
Good luck your going to need it
CFM= can't f ing matter she blows like the wind.
Go easy on the guy he has problems lol
qwerty hvac.... i know it's old... but i have replaced condensing units for this property owner in the past, with no problems. i am not asking for anyone's diagnosis@pascone 10
i was just curious if it was possible to have a leak in one direction and not the other.
Aren't all leaks one direction?
What exactly do you mean by that question?
Originally Posted by philstanley1
is it possible to have a leak in positive pressure but not negative (vacuum)
not if the comp. is running the system in a vac. and the leek is on the low side.
Originally Posted by SBKold
And to answer your ? with a ? how can a system under pressure only leak in one direction. I believe you may be just having a brain fart momment.
There is more pressure in the tubing with say nitrogen then in a vacuum. The leak should be more noticeable the higher the pressure as compared to a vacuum.
Why are you worried about a leak? Do you think it is leaking out of there as fast as your putting it in? Then stops leaking when your pressures are 49/178???