carrier heat pump wiring diagrams


  #1  
Old 12-17-00, 02:41 PM
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i need info on wiring up a carrier heat pump and thermostat.
the model number is 40aq0303330eh,which is now discontinued. the outside unit is already hooked up,the duct work needs ran under the house though.
if anyone can provide info on the wiring diagram for this unit please respond.

thanx

 
  #2  
Old 12-17-00, 04:20 PM
fjrachel
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Give me the model and s/n number of the outdoor unit. It should be a 38 series if you have a matching system. Also the KW heat in the 40AQ series air handling unit. Installing a Carrier or generic t'stat?
Note: you should have wiring diagrams in the air handler and the outdoor unit electrical access panels.
 
  #3  
Old 12-22-00, 06:19 AM
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outside unit info

outside unit serial #N506888, model #38QH024300SM.
inside unit model #40AQ030330EH, serial #3085A62629.
carrier thermostat box. I can't seem to find the KW
on the heat unit, the panel doesn't have it on it.
Inside the thermostat it has 8 screws to connect to.
They are labeled W2,C,G,R,E,L,O,Y. The wire colors are
brown,green,red,white,blue,yellow,orange, only seven.
Inside the unit has 8 screws to connect it to, 4 on top
4 on bottom. If you could help me out with this I would appreciate it very much.


Thank you
 
  #4  
Old 12-22-00, 02:53 PM
fjrachel
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Low voltage wiring(control/24v): You may use any color wires to these designations you wish, just be uniform throughout the system. Wire is wire.
t'stat Air handler heat pump
R --------------------R--------------------R
O---------------------O--------------------O
Y---------------------Y--------------------Y
C---------------------C--------------------C
W2--------------------W2-------------------W2
G---------------------G
E---------------------W2
L---------------------C
High voltage=220 to outdoor unit #10/2w/ground 30amp fuse
Air handler will also be 220, but you need to know the KW of the aux/em/W2 heat package in it to correctly size the wire and fuse/breaker
 
  #5  
Old 12-22-00, 05:18 PM
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wiring

I can't get it running with my interpretation of the dia gram.
OUTSIDE UNIT-air handler?
G E W2 W3 L R O Y C
INSIDE UNIT-heat pump?
G E W2 W3 L R O Y C
THERMOSTAT-HH07AT171
G E W2 L R O Y C
This is all of the connection points on each piece.
Do I just match everything all the way through?
G--G--G,E--E--E,W2--W2--W2,W3--W3--?,L--L--L,R--R--R,
O--O--O,Y--Y--Y,C--C--C.
My thermostat doesn't have a W3 like the others. What do I need to do about that?
 
  #6  
Old 12-22-00, 07:52 PM
fjrachel
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Sure, you can match them all. Forget about the W3 all together and the G at the heat pump.
outdoor=heat pump 38series
indoor=air handler 40series
Do you have 220v to the air handler? Do you have 24v at the transformer? Do you have 220v and 24v at the heat pump?
 
  #7  
Old 04-11-10, 04:59 AM
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It seems as though I remember being able to bridge two wires together on a carrier gas pack and make the heater come on. I think I have a bad thermostat and cannot remember which wires do this. You can hear the thermostat relays kick in, but the fire box never fires.
 
  #8  
Old 04-11-10, 10:30 AM
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If you bridge R and W on your low voltage terminal strip, you bypass the stat. Only do this to test. [!Never forget to leave a jumper on, or else you wil have runaway heat. This actually killed an old couple(on the news or in the paper) once, while they slept, from a stat or furnace malfunction!]

The fact the thermostat initiates a click though, shows something at least in that stat is functioning. But, I guess there is always a possiblity it is not the heat circuit, if say there was something shorting, causing say another relay for the fan or a/c to come on instead, I suppose.
 
 

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