HVAC reversing valve coil reversal

I show how I wired the reversing valve coil to accommodate a backwards installed reversing valve.

Category:

Howto & Style

Tags:

• DrZ
• reversing
• valve
• eight
• pin
• relay
• fix

[crownvvc4]

well i checked the continuity thru the coil on the contactor and i get a definite amt of resistance- but if i check the voltage thru the coil and i get a reading of controll voltage then the contactor is bad even though i get a reading of sum resistance?

[DrZarkloff]

@crownvvc4 Unless you have a replacement contactor coil you'll need to just replace the entire contactor.

[crownvvc4]

thanx for the help guys, really preciate it- the outdoor fan nor the compressor will cut on- there is a lil bit of a hum coming from the contactor- when the call for heat comes in the contactor closes but niether the fan nor compressor kicks in- the stat is not set on emergency or aux heat- the contactor is good-both outdoor tstats are good-im only in my 2nd semester of tech school and have not takin a heat pump course yet so im a bit weak in this area-how do i know if it is locked out?

[DrZarkloff]

@crownvvc4 The hum from the contactor means that the coil is getting voltage. Check the voltage at the contactor coil to see if you're getting the proper amount of control volts. The contactor is bad if you are.

[ken6675]

cool vid dr Z

Ken G

[DrZarkloff]

@ken6675 Thanks

[gibhvac]

Please make a video on how to check proper operation that a defrost cycle does work when doing a PM visit. I forgot myself and need a refresher course that I know you can provide. Thanks. HVAC contractor in Charleston SC.

[RhodesHVACR]

Your just looking for a fight huh guy? The technical term for the two types of heat pumps are non-conventional and conventional which tells you the position of the valve with power off. When you work in the field your not always working on brand new equipment, you run across a little bit of everything, new and old, so you better know how to work on both.

[topdoozie1]

@RhodesHVACR what are you talking about most manufactures trane, lennox and carrier energize the revesing valve in cooling so if the valve sticks or siezies they will still have heat. energizes o terminal, rheem Rudd weather king energize the reversing vale in heat, b terminal

[RhodesHVACR]

when you say heating active and cooling active I am assuming you mean conventional and non-conventional heat pumps.

[co2x3]

Dr Z its not a perfect world must have been on a friday or a monday. lol nice to give us the scoop

[hvacbuck]

@tstatech i hear ya... and reversing valves are a pain in the ass in the first place. that being said, i appreciate him showing how to fix the problem w/ a simple relay. way better than starting over. i didnt mean to offend, more just quoting what my boss said to me when i did my first rv. dr z you the man, i still have 100% confidence.