Humiditrol - Lennox iComfort M30 Installation And Setup Manual

H
UmiDitrol
This option is available if the Humiditrol accessory
is present and enabled in the Advanced Settings
> System Setup. Under Advanced Settings >
Terminal Settings, verify that the H/D or ACC
terminals are configured correctly for dehumidify
control. In this mode, the H/D terminal (if selected
for dehumidify) is always ON (24VAC) when
the outdoor temperature is greater than 95°F.
This prevents the system blower from running at
reduced speed if the outdoor temperature is greater
than 95°F.
NOTE: The outdoor temperature sensor MUST
be attached to the unit in order to use this
mode.
Equipment Operation with Humiditrol Enabled
Notes:
The Humiditrol Comfort Adjust (HCA) variable is user-selectable and can be set to MIN, MAX,or
MID
Humiditrol prohibited if outdoor temperature > 95
RUN EQUIPMENT IN
NORMAL COOLING
MODE
RUN EQUIPMENT IN
NORMAL HEATING
MODE
DEACTIVATE ALL
EQUIPMENT
DEACTIVATE ALL
EQUIPMENT
Figure 10. Equipment Operation with Humiditrol
35
o F OR if indoor temperature < 65 o F
START
YES
IS THERE A COOLING
DEMAND?
NO
YES IS THERE A HEATING
DEMAND? RUN HUMIDITROL
NO
IS THERE A
NO
DEHUMIDIFICATION
DEMAND?
YES
IS HCA = MAX, AND
YES
INDOOR TEMPERATURE > 2 o F
ABOVE HEATING SETPOINT?
NO
IS HCA = MIN, AND
YES
INDOOR TEMPERATURE >
2 o F BELOW COOLIING
SETPOINT?
NO
IS HCA = MID, AND
NO
INDOOR TEMPERATURE > YES
(HEATING
SETPOINT+COOLIING
SETPOINT)/2?
Enabled