GlennWest Posted June 30, 2020 Report Share Posted June 30, 2020 (edited) I have mentioned this in a post about an inverter. Looking at Samsung, Whirlpool. They all require a 30 amp 240 breaker. But plainly states 800 watts. All that is needed is 10 amp for that low wattage. Now I would have no problem with that 30 amp system but I wonder about what they actually pull since they want a 30 amp system. Edited June 30, 2020 by GlennWest Quote 2003 Teton Grand Freedom towed with 2006 Freightliner Century 120 across the beautiful USA welding pipe.https://photos.app.goo.gl/O32ZjgzSzgK7LAyt1 Link to comment Share on other sites More sharing options...
Dutch_12078 Posted June 30, 2020 Report Share Posted June 30, 2020 Are you allowing for the LRA, "Locked Rotor Amps" (starting current) the compressor draws briefly at startup? That typically double or triple draw must be allowed for in the power supply and protection design. Quote Dutch 2001 GBM Landau 34' Class A F-53 Chassis, Triton V10, TST TPMS 2011 Toyota RAV4 4WD/Remco pump ReadyBrute Elite tow bar/brake system Link to comment Share on other sites More sharing options...
GlennWest Posted June 30, 2020 Author Report Share Posted June 30, 2020 (edited) Good question. They are heat pump but I don't know how efficient a heat pump they are. Mini split doesn't, standard heat pumps do. They don't supply that info. But 3600 watts is a lot Edited June 30, 2020 by GlennWest Quote 2003 Teton Grand Freedom towed with 2006 Freightliner Century 120 across the beautiful USA welding pipe.https://photos.app.goo.gl/O32ZjgzSzgK7LAyt1 Link to comment Share on other sites More sharing options...
Dutch_12078 Posted June 30, 2020 Report Share Posted June 30, 2020 Mini-splits usually have three motors, one for the compressor, one for the external fan, and one for the internal fan. The startup current for all three must be considered in the sizing. Quote Dutch 2001 GBM Landau 34' Class A F-53 Chassis, Triton V10, TST TPMS 2011 Toyota RAV4 4WD/Remco pump ReadyBrute Elite tow bar/brake system Link to comment Share on other sites More sharing options...
GlennWest Posted June 30, 2020 Author Report Share Posted June 30, 2020 Oh my mini splits have no LRA. Mine pull around 400 watts. Little more on heat. Now most inverters are double capable for a few seconds. Those all cheap dometic heat pumps need 20 amps. Quote 2003 Teton Grand Freedom towed with 2006 Freightliner Century 120 across the beautiful USA welding pipe.https://photos.app.goo.gl/O32ZjgzSzgK7LAyt1 Link to comment Share on other sites More sharing options...
Randyretired Posted June 30, 2020 Report Share Posted June 30, 2020 (edited) 56 minutes ago, Dutch_12078 said: Mini-splits usually have three motors, one for the compressor, one for the external fan, and one for the internal fan. The startup current for all three must be considered in the sizing. The mini splits use an inverter system and start very slow and soft. Then ramp up slowly to what is needed. Unlike other heat pumps these vary the compressor and fans as needed. Virtually no surge current at start. The start up current is less than full cooling. Edited June 30, 2020 by Randyretired Clarity Quote Randy 2001 Volvo VNL 42 Cummins ISX Autoshift Link to comment Share on other sites More sharing options...
GlennWest Posted June 30, 2020 Author Report Share Posted June 30, 2020 Been searching all morning and not found anything about start up power. But the condensor is small compared to large acs. 800 watts is the average rating. Quote 2003 Teton Grand Freedom towed with 2006 Freightliner Century 120 across the beautiful USA welding pipe.https://photos.app.goo.gl/O32ZjgzSzgK7LAyt1 Link to comment Share on other sites More sharing options...
Dutch_12078 Posted June 30, 2020 Report Share Posted June 30, 2020 2 hours ago, Randyretired said: The mini splits use an inverter system and start very slow and soft. Then ramp up slowly to what is needed. Unlike other heat pumps these vary the compressor and fans as needed. Virtually no surge current at start. The start up current is less than full cooling. That's good to know, Randy, but it doesn't explain the stated 30 amp 240 volt service requirement for an apparent 800 watt load... Quote Dutch 2001 GBM Landau 34' Class A F-53 Chassis, Triton V10, TST TPMS 2011 Toyota RAV4 4WD/Remco pump ReadyBrute Elite tow bar/brake system Link to comment Share on other sites More sharing options...
Randyretired Posted July 1, 2020 Report Share Posted July 1, 2020 I am not sure but the 30 amp 240 Glenn is looking at seems to be for a heat pump dryer. I don't have the specs here now but the mini splits need about 10 amps or less for the size like Glenn's. I don't know how the dryers are setup but I don't think those are split like a mini split and I doubt those are variable speed. The 30 amp 240 is standard for regular dryers and it doesn't make sense at all for 800 watts. Even at a surge of 2, 3 or even 4 times it wouldn't need that. Something is amiss here. Quote Randy 2001 Volvo VNL 42 Cummins ISX Autoshift Link to comment Share on other sites More sharing options...
Randyretired Posted July 1, 2020 Report Share Posted July 1, 2020 After thinking about the heat pump dryer if it is only 800 watts that would seem to be very efficient. If it has a hspf figure in the specs we could verify how efficient it is. Still 30 amps 240 doesn't fit at all. Quote Randy 2001 Volvo VNL 42 Cummins ISX Autoshift Link to comment Share on other sites More sharing options...
GlennWest Posted July 1, 2020 Author Report Share Posted July 1, 2020 Randy, after thinking on this for a while, think I understand. Manufacturers sells dryers now with no cord. You buy one if you need one. All dryer cords are #10 wire. #10 wire gets 30 amp breaker. Quote 2003 Teton Grand Freedom towed with 2006 Freightliner Century 120 across the beautiful USA welding pipe.https://photos.app.goo.gl/O32ZjgzSzgK7LAyt1 Link to comment Share on other sites More sharing options...
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