Xylem MM 277G Model RB-24E-S , Model RB-24E-A , Model RB-24E-L , Conductance Type LowWater Cut-Off - Manual (Page 4)

RB-24E-S Transformer ‘Y’ Harness
with GREEN Color Tubing
A. Remove connector of boiler wiring
harness from Aquastat transformer
connector.
B. Plug connector of boiler wiring
harness to connector of ‘Y’ harness with
GREEN color tubing.
C. Plug connector of ‘Y’ harness with GREEN
color tubing to Aquastat transformer
connector.
NOTE
Burner will not operate and
RB-24E red LED will blink if
wrong “Y” harness is used.
A. Remove connector of boiler wiring
harness from boiler control transformer
connector.
B. Plug connector of boiler wiring harness to
connector of ‘Y’ harness with BLUE color
tubing.
C. Plug connector of ‘Y’ harness with BLUE
color tubing to boiler control transformer
connector.
RB-24E-S Transformer ‘Y’ Harness
with BLUE Color Tubing
NOTE
Burner will not operate and
RB-24E red LED will blink if
wrong ‘Y’ harness is used.
STEP 1 - Electrical Wiring Options (continued)