Lyric T5 wiring help

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  #1  
Old 06-19-19, 08:33 PM
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Lyric T5 wiring help

Trying to hook up a Lyric T5+ thermostat for a dual stage heat pump. My old thermostat wiring which has 10 wires (2 are for sensors that I know I won't need).
On the left side on the outer "Heat Pump" arrows:
Y2-black wire
X2-brown wire
W1-white wire
S1-red wire
S2-white wire
On the right side under outer "Heat Pump" arrows:
RC-red wire
O-Orange wire
Y-Yellow wire
G-Green wire
B-Blue wire

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Last edited by PJmax; 06-20-19 at 01:28 AM. Reason: reoriented/resized picture
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  #2  
Old 06-20-19, 02:04 AM
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Welcome to the forums.

You have and will be following the 3H/2C heat pump with backup heat diagram.

Y2-black wire -------------> Y2
X2-brown wire - tape off - not needed
W1-white wire ------------> AUX
S1-red wire - tape off - not needed
S2-white wire - tape off - not needed
RC-red wire ----------------> R with the R switch up
O-Orange wire -------------> O/B
Y-Yellow wire ---------------> Y1
G-Green wire ---------------> G
B-Blue wire -----------------> C

Mandatory option settings
option 200 - heat pump
option 205 - heat pump / air to air
option 218 - O/B on cooling
option 220 - 2 cooling stages
option 221 - heat stages 2 and AUX/E stages 1
 
  #3  
Old 06-20-19, 05:10 AM
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Without the X2 wire, will I not have the auxiliary or emergency heat?
 
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Old 06-20-19, 12:58 PM
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W1 white and X2 brown are typically the same function and connect together at the air handler.
Your stat will access the E heat via the AUX/E terminal.
 
  #5  
Old 06-20-19, 01:32 PM
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Worked like a charm. Thank you for sharing your expertise, I really appreciate it.
 
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Old 06-20-19, 01:35 PM
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Your are very welcome.............
 
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