3 ph 30 amp time clock?
- Thread starter sid123456
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kjfelec
Member
- Location
- Massachusetts
3 Phase contactor controlled by time clock
- Location
- Massachusetts
Use a normal 120 volt single pole time clock and kill the control circuit.
Many hermetic compressors have built in crankcase heaters and should have the line voltage left on 24/7.
Many hermetic compressors have built in crankcase heaters and should have the line voltage left on 24/7.
growler
Senior Member
- Location
- Atlanta,GA
Sounds more like a job for a HVAC contractor to intall a programable controller. It's not that expensive and the control circuit belongs to the HVAC guys I wouldn't mess with it.
- Location
- Massachusetts
I don't give away work, I can work control circuits.:smile:
LarryFine
Master Electrician Electric Contractor Richmond VA
- Location
- Henrico County, VA
- Occupation
- Electrical Contractor
Something has to tell the unit when to run. I bet there's a way to insert a simple 2-wire switch loop somewhere. I can't speak for warranty issues.
Otherwise, a simple time-clock will run a 3-pole contactor.
mdshunk
Senior Member
- Location
- Right here.
Yeah. Most people call them a programmable thermostat, and do it on the control circuit. :wink:
hillbilly1
Senior Member
- Location
- North Georgia mountains
- Occupation
- Owner/electrical contractor
Be careful what power you kill, as some have crankcase heaters.
growler
Senior Member
- Location
- Atlanta,GA
Thanks Marc, I was thinking thermostat and wrote controller.
But a small White-Rodgers or Honeywell programmable thermostate is just the thing.
The only reason I don't install those anymore is because I was told that I could void the warranty. It's a good little money maker, quick and easy to install but here you are suposed to be a licensed HVAC contractor or work for one.
mdshunk
Senior Member
- Location
- Right here.
Just remember that a heat pump thermostat is different, and since this is 3-phase, you might even need a stat with more than one stage. Just a head's up.
- Location
- Massachusetts
Did you guys notice this is a pool heater?
mdshunk
Senior Member
- Location
- Right here.
No, I didn't. In that case, Ranco makes an awesome programmable stat for that application. I can dig up a link for the OP if he wants.
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