Ventilation Wiring - Lennox iComfort M30 Installation And Setup Manual

• When the Non-ASHRAE Compliant mode is selected (Timed), the system first checks for the outdoor
temperature and dew point to be within the set parameter range before allowing ventilation to occur.
• When the ventilation changes states (on/off) due to an environmental override, it will remain in that state
for a minimum of 10 minutes before again changing states due to an environmental override.
• Operation is otherwise the same as the ASHRAE compliant method.
• Terminals ACC1 and ACC2 are dry contacts in this mode.

Ventilation Wiring

HRV/ERV
Terminal Block
LOW HI
ON COM
RED
NO
YEL NC
GRN
BLK
Low Speed
Wire Jumper required between ON and RED terminals.
Remove the factory installed jumper between ACC1 and R2
terminals (The on-board 24VAC power source cannot be used.).
For low speed operation only.
On 2-Stage systems requiring high speed operation, move wire from the
terminal block LOW terminal to HI terminal.
Figure 11. ERV / HRV Wiring
See "Table 1. Terminal Designations" on page 7 for further details on each terminal.
Operation of Fresh Air Dampers with Environmental Overrides
M30
ACC ACC
R2
2 1
45