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ccryan2000
07-19-2007, 01:39 PM
I would like to know what the current draw is for a 5-ton Lennox XP19 in cooling mode in low cool and high cool stages. Does anybody have this info?

creativepuzzle
07-19-2007, 03:21 PM
I am not a HVAC expert but I am a power engineer. You can figure out usage this way: 60,000 BTU divided by # of seers = watt usage. I am assuming it is 19 SEER? 60K/19 = 3158 watts / voltage = current. Assuming voltage of 220V the current would be 14.35 amps. That is typical, to calculate worst case, divided by the lowest voltage the unit can operate as your unit since is a constant power device. When the voltage drops, current increases.

ccryan2000
07-19-2007, 04:03 PM
Good information. I'm really trying to understand the difference in general power consumption or current draw between low cool and high cool. I was not able to find any documentation on this unit showing this information.

t527ed
07-19-2007, 04:24 PM
what coil and furnace or blower coil is it working with ?

ccryan2000
07-19-2007, 05:00 PM
The furnace is G60UHV60D-135 and as far as the coil, I'm not sure, but the ARI is 16.45 from the matchup of the coil and the 5 ton XP19.

t527ed
07-19-2007, 05:59 PM
need the whole coil#, should be a c33- or cx34- sitting on top of or next to the heater.

heatingairman
07-19-2007, 06:02 PM
I would like to know what the current draw is for a 5-ton Lennox XP19 in cooling mode in low cool and high cool stages. Does anybody have this info?

Watts 1st Stage - 148
2nd Stage - 219
Compressor
Locked Rotor Amps - 118
Power Factor - 0.98
Fan Motor

ccryan2000
07-19-2007, 06:05 PM
Thanks for the info. Do you have a data sheet that shows how much the compressor uses in 1st stage versus 2nd stage?

heatingairman
07-19-2007, 06:12 PM
Hmmm. I'll have to look for that one....

amd
07-19-2007, 07:37 PM
Compressor amp draw varies depending on operating conditions.

SEER ratings are worthless. The only way to find out involves an ammeter.

Kevin Weaver
07-19-2007, 08:04 PM
try this phone number. its lennox tech assitance
1-800-453-6669
its like 1-800-4lennox
hope this helps
oh, if this is a varible speed furnace, which it sounds like, don't make motor do a slow ramp because in the heat mode the head pressure will go to high and trip saftey

heatingairman
07-19-2007, 08:07 PM
try this phone number. its lennox tech assitance
1-800-453-6669
its like 1-800-4lennox
hope this helps
oh, if this is a varible speed furnace, which it sounds like, don't make motor do a slow ramp because in the heat mode the head pressure will go to high and trip saftey

Uhhhhhh.... Don't use that number. That number is for contractors. Use 1-800-9-LENNOX.