Question about Ruud Matching Split Air Conditioner

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AC draws more current in hot mode

Its a 1.5 Ton General. In Cold mode it draws 9 Amp but in Hot mode It draws 15 Amp where as rated current is 10.7, still the heating is OK.

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If this is aheat pump or reverse cycle unit that amps in heating is to high. Should not go over nameplate amps in heat or cool. Sounds like maybe two things. Overcharge and stopped up coil on the inside air handler. The reason for the high amps is in heat the head pressure is higher than normal. So check the coil inside and have the charge checked because that compressor wont run long pulling that much amps over nameplate. Keep in touvh Rus.

Posted on Nov 25, 2009

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1 Answer

Gen set blows fuse


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a fuse is there to protect the circuit and the genset
check why the de-icer is pulling so many amps as the problem may be in that unit
a 10 amp outlet has a maximum current capacity of 10 amps as that is the current allowable from the gen set and wire capacity
even if you had an outlet with 15 amp rating , it would still be blowing fuses as the 16 amps is above the allowable current draw
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Aug 10, 2016 | Kohler Electrical Supplies

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Dead battery 1990 xlh sportster 1200


The voltmeter test provides a general indicatorof battery condition. Check the voltage of the battery to verify that it is in a 100% fully charged condition. If the open circuit (disconnected) voltage reading is below 12.6V, charge the battery and then recheck the voltage after the battery has set for one to two hours. If the voltage reading is 12.8V or above, perform the load test described below.



The load test measures battery performance under full current load and is the best indicator of battery condition. Load testing a battery tat is not FULLY CHARGED i.e. at 12.8 VDC can permanently damage it. Fully charge it first and then let it stand for at least an hour before the load test is done. You also need a load tester. AND you should know how to perform a load test. Often the best way to load test a battery will be to take it to a battery shop and have it done there.



VOLTAGE (OCV) STATE OF CHARGE FOR AGM BATTERIES IS:

12.8 VDC = 100%

12.6 VDC = 75%

12.3 VDC = 50%

12.0 VDC = 25%

11.8 VDC = 0%



COLD CRANKING AMPERAGE (CCA) for a DYNA battery is 270













19 AMP HOUR BATTERY =



BATTERY STATE OF CHARGE = 12.8 VDC = 100% Charge; Rate of Charge = N/A



BATTERY STATE OF CHARGE = 12.6 VDC = 75% Charge; Rate of Charge @ 3 AMP = 1.75 hours @ 6 AMP = 50 minutes @ 10 AMP = 30 minutes @ 20 AMP = 15 minutes



BATTERY STATE OF CHARGE = 12.3 VDC = 50% Charge; Rate of Charge @ 3 AMP = 3.5 hours @ 6 AMP = 1.75 hours @!10 AMP = 1 hour @ 20 AMP = 30 minutes



BATTERY STATE OF CHARGE = 12.0 VDC = 25% Charge; Rate of Charge @ 3 AMP = 5 hours @ 6 AMP = 2.5 hours @ 10 AMP = 1.5 hours @ 20 AMP = 45 minutes



BATTERY STATE OF CHARGE = 11.8 VDC = 0% Charge; Rate of Charge @ 3 AMP = 6 hours, 40 minutes @ 6 AMP = 3 hours, 20 minutes @ 10 AMP = 2 hours @ 20 AMP = 1 hour





The figures listed above assume that the battery is charging at room temperature. If warmer than room temperature, use a slightly shorter charging time. If colder, use a slightly longer charging time.



The use of constant current chargers to charge maintenance-free batteries is not recommended. Any overcharge

will cause dry-out and premature battery failure. If a constant current charger is the only type available, do not exceed the charge times listed above and do not continue charging the battery if it gets hot. When charging, never exceed 15 volts for more than 30 minutes.



If the battery gets hotter than 110 degrees F. (43 degrees C) during charging, discontinue charger and allow the battery to cool. Overheating may result in plate distortion, internal shorting, dry out and/or other damage.



COLD CRANKING AMPERAGE (CCA) for a DYNA battery is 270

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1 Answer

Chaging batter


The voltmeter test provides a general indicatorof battery condition. Check the voltage of the battery to verify that it is in a 100% fully charged condition. If the open circuit (disconnected) voltage reading is below 12.6V, charge the battery and then recheck the voltage after the battery has set for one to two hours. If the voltage reading is 12.8V or above, perform the load test described below.



The load test measures battery performance under full current load and is the best indicator of battery condition. Load testing a battery tat is not FULLY CHARGED i.e. at 12.8 VDC can permanently damage it. Fully charge it first and then let it stand for at least an hour before the load test is done. You also need a load tester. AND you should know how to perform a load test. Often the best way to load test a battery will be to take it to a battery shop and have it done there.



VOLTAGE (OCV) STATE OF CHARGE FOR AGM BATTERIES IS:

12.8 VDC = 100%

12.6 VDC = 75%

12.3 VDC = 50%

12.0 VDC = 25%

11.8 VDC = 0%



COLD CRANKING AMPERAGE (CCA) for an XLH battery is 270













19 AMP HOUR BATTERY =



BATTERY STATE OF CHARGE = 12.8 VDC = 100% Charge; Rate of Charge = N/A



BATTERY STATE OF CHARGE = 12.6 VDC = 75% Charge; Rate of Charge @ 3 AMP = 1.75 hours @ 6 AMP = 50 minutes @ 10 AMP = 30 minutes @ 20 AMP = 15 minutes



BATTERY STATE OF CHARGE = 12.3 VDC = 50% Charge; Rate of Charge @ 3 AMP = 3.5 hours @ 6 AMP = 1.75 hours @!10 AMP = 1 hour @ 20 AMP = 30 minutes



BATTERY STATE OF CHARGE = 12.0 VDC = 25% Charge; Rate of Charge @ 3 AMP = 5 hours @ 6 AMP = 2.5 hours @ 10 AMP = 1.5 hours @ 20 AMP = 45 minutes



BATTERY STATE OF CHARGE = 11.8 VDC = 0% Charge; Rate of Charge @ 3 AMP = 6 hours, 40 minutes @ 6 AMP = 3 hours, 20 minutes @ 10 AMP = 2 hours @ 20 AMP = 1 hour





The figures listed above assume that the battery is charging at room temperature. If warmer than room temperature, use a slightly shorter charging time. If colder, use a slightly longer charging time.



The use of constant current chargers to charge maintenance-free batteries is not recommended. Any overcharge

will cause dry-out and premature battery failure. If a constant current charger is the only type available, do not exceed the charge times listed above and do not continue charging the battery if it gets hot. When charging, never exceed 15 volts for more than 30 minutes.



If the battery gets hotter than 110 degrees F. (43 degrees C) during charging, discontinue charger and allow the battery to cool. Overheating may result in plate distortion, internal shorting, dry out and/or other damage.



COLD CRANKING AMPERAGE (CCA) for a 2001 XLH battery is 270

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1 Answer

How to wire 240/15/1


240 VAC single phase 15 amp. Newer code requires a 4 terminal plug. Ground is now seperate from the neutral/return. 12 gauge wire should be acceptable for up to 8 feet, 10 would be better and better for a bit longer run- reduces voltage drop and current draw slightly.

On the motor itself, it should have the terminal connections marked on the motor or on the cover plate.

in general the "hot" pair connect across the hot terminals of the motor. and the ground goes to frame of motor. There should be a terminal location for "white" which would be "floating" if the motor is convertible 120/240.

Black +Black or Black +Red depending how the space was wired, it in most cases does not matter which of the two motor connections the hots are connected to on single phase unless explicity denoted on motor. this is rare. Three phase it matters for direction.

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1 Answer

Duo therm 15000 heat pump on ac starts blowing cold short while later warm.


Hi,
A little more info would help. When you say blows cold and then warm after a while, can you still here the compressor running? There are a couple of things that could cause this: 1. Check how much current the compressor is drawing. You will need an ammeter for this but it's necessary. From inside, if you have a penguin (low profile, 9" tall) hook the ammeter to the black wire in the harness. If you have the BriskAir then hook it to the blue wire. Start the A/C and watch the meter. The exact reading is temperature dependent but should be about 12 amps or so, this includes the motor. There is a rating plate visible from the air return that gives the exact amp draw for each unit. This is at 95 degrees F on the roof. For every 10 degrees over, add one amp, for every 10 degrees below, subtract one amp. If the reading is more than what it should be, most likely the coils (both evaporator and condenser) need to be cleaned. If there is too high an amp draw for a certain period, the compressor overload will shut it off but the fan will continue to run. Too low would be low freon most of the time.
2. There could be an issue with the reversing valve.
Give me a model number and I can give you more information.

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Just need to find out what max current during hot weather (Houston, Texas) will this unit require? If this is the only thing on the circuit is a 15 amp breaker enough? Thanks Bill


Unless this is a very small unit I would not use anything less than 20 amp. and then only if it is a newer unit with scroll type compressor.
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1 Answer

My church has a roof top ac unit, model # GP-1360H41BA. The ratings plate has the following ratings: RLA 26.4 AND LRA 134. What is the KW draw of this unit 1. At startup 2. After startup?


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LRA ( Locked rotor amp/current)

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