CTC Union 71157P - Page 3

3 Installer Manual
Wiring Terminations for model 73257P
Terminal Function Description
  3D *OQVU 7PMU"$$PPMJOH5SBOTGPSNFS
    %VBM5SBOTGPSNFS4ZTUFNT0OMZ
  3I *OQVU 1PXFS$POOFDUJPO7PMU"$)FBUJOH  
    5SBOTGPSNFSPS.JMMJWPMU1PXFS4PVSDF
( 0VUQVU 'BO$POUSPM
8&8 0VUQVU 8TU4UBHF$POWFOUJPOBM)FBU
   &&NFSHFODZ)FBU 
8SE4UBHF"VYJMJBSZ)FBU
   8 0VUQVU OE4UBHF$POWFOUJPOBM)FBU 
 0#7 0VUQVU 0$PPM"DUJWF3FWFSTJOH7BMWF   
    #)FBU"DUJWF3FWFSTJOH7BMWF
    7;POF7BMWF1PXFS$MPTF
  : 0VUQVU TU4UBHF$PNQSFTTPS
  : 0VUQVU OE4UBHF$PNQSFTTPS
  - *OQVU 4ZTUFN.BMGVODUJPO*OEJDBUPS
$ *OQVU 7PMU"$5SBOTGPSNFS$PNNPO
4
4
Connecting Your Wires (continued)
3
*OQVU 0QUJPOBM3FNPUF4FOTPSJOEPPSPSPVUEPPS
Heat Only or Millivolt
Set System Type to 11CONV
Rh 1PXFS$POOFDUJPO
W1 )FBU3FMBZ
G 'BO3FMBZ[note 4]
C
7PMU"$5SBOTGPSNFS$PNNPO[note 1, 3]
1 HEAT / 1 COOL Single or Dual Transformer
Set System Type to 11CONV
Rh 7PMU"$1PXFSIFBUJOHUSBOTGPSNFS[note 2]
Rc 7PMU"$1PXFSDPPMJOHUSBOTGPSNFS[note 2]
W1 )FBU3FMBZ
Y1 $PNQSFTTPS3FMBZ
G 'BO3FMBZ
C 7PMU"$5SBOTGPSNFS$PNNPO[note 1, 3]
5ZQJDBM8JSJOH$POmHVSBUJPOT
NOTE: The “System Type” option will be configured in the Installer Settings section. The 71157P is a single
stage thermostat and not intended for multi stage equipment.
$POWFOUJPOBM4ZTUFNT