RG CTH3-150 - Manual (Page 49)

SECTION 10: W IRING
43 of 71
10.3 Communication Wiring within a Zone of Heaters (continued)
Satellite heaters will be wired in series to the central heater via low voltage control wiring.
Communication wiring uses the T28-T31 terminals on the control,
See Page 42 through Page 43, Figure 25.
FIGURE 25: Communication Wiring within a Zone of Heaters (continued)