Tekmar 521 - Page 11

© 2020 521_D - 12/20
11 of 28
A Watts Water Technologies Company
Thermostat Wiring
Air Conditioner ----------------------------------------------------- -----------------------------------------------------
Furnace (second stage heat) ----------------------------------------- -----------------------------------------
Furnace and Air Conditioner ---------------------------------------- ----------------------------------------
R
Y
G
C R Y/W2 Rc GGRh W1 S1 S2Com
No Power
Air
Conditioner
C R Y/W2 Rc GGRh W1 S1 S2Com
No Power
R W G
Furnace
C R Y/W2 Rc GGRh W1 S1 S2Com
No Power
C
R
W
Y
G
Furnace
Air
Conditioner
Field Jumper Required:
• R to Rh
• Rh to Rc
• Rc to G
Field Jumper Required:
Rc to G
Field Jumper Required:
Rc to G