Carrier CRHEATER101A00 Installation Instructions Manual page 27

R Use
Fig. 42 — TB4 Terminal Use (HP Only)
CONTROL
8
BOARD
W1 Use
VIO
R Use
Fig. 43 — TB4 Terminal Use (AC Only)
Fig. 41 — TB4 Wiring (AC Only)
W2 Use
C Use
W2 Use
VIO
C Use
27
NOTE:
Optional Outdoor Temperature Control
at One Heater Stage –
Move heater wire to this terminal and
connect outdoor temperature switch
between second and third terminals.
NOTE:
Optional Outdoor Temperature Control
at One Heater Stage –
Move heater wire to this terminal and
connect outdoor temperature switch
between second and third terminals.
CONTROL
12
BOARD