Revision as of 19:13, 25 January 2022

Installation

It is not clear whether tubing can be left coiled - [1]. Install manuals say so - one of the diy systems with precharged line sets there instructions specifically state to coil the excess at the system. - but author speculates that since lubricating oil is also carried with refrigerant, there could be an issue.
First principle calculations say - Say there is 8 feet of coil left.

Point - disconnect vacuum After filling up low pressure side with 1 PSI of refrigerant- [2]
- 1 lb? Not 1 atm? Under 1 lb, 14 psi of atmosphere would mean that air actaully leaks into the tubing.
- Note that instructions say to 'let in refrigerant for 5 seconds with quarter turn of valve' - steps 9-10 on page 30 of manual [3]. This is not correct - we should look at the actual valve, no? Video says 1 lb - also not correct. The right way should be to look at the valve, not by time - but by when valve reads a little above atmospheric pressure of 14 psi.

Heat pump for heating and cooling that works down to -20F. 7kW of heat.

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 =Notes=
-*It is not clear whether tubing can be left coiled - [https://diy.stackexchange.com/questions/215783/how-bad-is-it-to-have-low-spots-in-a-mini-split-line-set#:~:text=I'm%20about%20to%20install,low%20spots%20in%20the%20lines.]. Install manuals say so.
+*It is not clear whether tubing can be left coiled - [https://diy.stackexchange.com/questions/215783/how-bad-is-it-to-have-low-spots-in-a-mini-split-line-set#:~:text=I'm%20about%20to%20install,low%20spots%20in%20the%20lines.]. Install manuals say so - ''one of the diy systems with precharged line sets there instructions specifically state to coil the excess at the system.'' - but author speculates that since lubricating oil is also carried with refrigerant, there could be an issue.
+*First principle calculations say - Say there is 8 feet of coil left.
 =Key Videos=