System Wiring Diagrams; Connecting Thermostat Wiring; Supported Configurations - Lennox iComfort M30 Installation And Setup Manual

Table 2. O/B Terminal Relationship States
State O/B Terminal Control
During heating
O terminal : OFF
B terminal : ON
During cooling
Heat/Cool
O terminal : ON
mode
B terminal : OFF
No Demand
The terminal continues the previous ON / OFF
state
The terminal state continues the state before en-
Off mode
tering off mode
s W D
ystem iring iagrams
For system diagrams, see the included fold-out
iComfort® M30 Smart Thermostat System
Diagrams sheet.
C t
onneCting Hermostat
Use "Table 1. Terminal Designations" on page 8
for connecting the thermostat wiring to the back
plate terminals.
If this is a replacement thermostat, connect
to terminals as noted when removing the old
thermostat. If terminals were different on old
thermostat, use "Table 1. Terminal Designations" on
page 8 and wiring diagrams provided in the kit.
W
iring
NOTE: Remember to seal the hole in the wall with
a suitable material to prevent drafts from
entering the thermostat case. Not doing
so could affect the thermostat's internal
temperature sensor.
s C
UPPorteD onfigUrations
See "Table 3. Supported Configurations" on page
10.
9