Lennox iHarmony 10C16 Installation Instructions

11
Table 11. Smart Hub Parameters
Parameter Description
Zone 1
through
4 Heating
CFM
Minimum and maximum CFM will be dependent
on system component congurations. These pa-
rameter values are automatically adjusted to the
specic hardware conguration (See table 9 in
iHarmony installation instruction for minimum
CFMs for specic indoor units).
Target heating CFM for a specic zone. Range
is 5 to maximum of indoor unit. Default is depen-
dent on tonnage of indoor unit. Adjustments are
in increments of 5 CFM. Adjustments are in incre-
ments of 5 CFM.
Zoning
Anticipated
Discharge Air
Temperature
Adjustment
This parameter setting compensates for a rapid
change of the discharge air temperature due to
fast changing conditions. It examines the change
in the discharge air temperature for the previous
two minutes and extrapolates or looks forward by
the number of seconds set in the parameter and
uses this as the DATS value for staging. This pa-
rameter setting helps prevent limit trip/frozen coil
from occurring.
Range is 0 to 120 seconds. Default is 30 seconds.
Adjustments are in increments of 5 seconds.
Zoning Gas
Heating DAT
Cooldown
Target
At the end of a gas cycle, the Heat Blower Off-De-
lay may not be long enough to completely cool
the heat exchanger. This may result in a primary
limit trip then, or at the beginning of the next heat
demand. This parameter allows the blower to run
after a gas heat call ends until the discharge air
temperature sensor (DATS) cools to the tempera-
ture set in the parameter. If the temperature is set
too low this will cause the temperature in the room
to overshoot.
Range is 80 to 90°F (26.67 - 32.22°C). Default is
85°F (29.44°C). Adjustments are in increments of
1°F (0.56°C).
Zoning
Minimum
Zone Run-
Time
Range is 90 to 600 seconds. Default is 120 sec-
onds. Adjustments are in increments of 30 sec-
onds.
Zoning
Supply Air
Temp Limit
for Cooling
In cooling mode, this setting sets the discharge air
temperature low limit. Below this temperature, the
cooling is turned off.
Range is 35 to 45°F (1.67 - 7.22°C). Default is
40°F (4.44°C). Adjustments are in increments of
1°F (0.56°C).
Zoning
Supply Air
Temp Limit
for Gas /
Electric
Heating
In heating mode, this setting sets the target dis-
charge air temperature.
Range is 100 to 160°F (37.78 to 54.44°C). Default
is 140°F (43.33°C). Adjustments are in increments
of 5°F (2.78°C).
Zoning
Target
Supply Air
Temp for
Cooling
In cooling mode, this setting sets the target dis-
charge air temperature.
Range is 40 to 60°F (4.44 - 15.56°C). Default is
45°F (7.22°C). Adjustments are in increments of
1°F (0.56°C).
Zoning
Target
Supply Air
Temp for HP
Heating
In heat pump heating mode, this setting sets the
target discharge air temperature.
Range is 85 to 110°F (29.44 to 43.33°C). Default
is 90°F (32.22°C). Adjustments are in increments
of 1°F (0.56°C).
Zoning
Target
Supply Air
Temp for
Gas/Electric
Heating
Default is 110°F. Range is 100°F to 130°F with
1 degree increment adjustable. In heating mode,
this setting sets the target discharge air tempera-
ture.
Zoning Sequence of Operations
When power is rst applied, the green Status LED will
ash, indicating that the damper control is functioning
normally. When the control is rst powered on, there is a
5 minute minimum time delay during which only the fan
output will respond.
Heating / Cooling Changeover
The following is an example of how the system operates
during a heating / cooling changeover.
When the system is satisfying a call from zone 1 for
heating and receives a call for cooling from zone 2, the
following will occur:
• Then system will continue to fulll the demand from
zone 1 until satised, or a maximum time of 20 minutes
has occurred.
• If after 20 minutes the system is still operating based on
satisfying the heating demand from zone 1, the system
will terminate that demand.
• The system will then shut system down for ve (5)
minutes. This will allow for system temperatures and
operating pressures to stabilize.
• After a ve 5 minute delay the system will begin
operations to satised the cooling demand from zone 2.
The system will continue to operate in this matter each
time it receives a zone call that is opposite of the current
mode of operation (heating or cooling).
Damper Operation
Cooling Operation Conventional Heat/Cool and Heat
Pump Systems
When a zone thermostat makes a demand for cooling, the
zone damper opens and the cooling equipment begins
operating.
Cooling demand is terminated when:
1. All zone demands for cooling are terminated.
2. The demand has exceeded the heat/cool changeover
time limit (20 minutes) while a heat demand exists.
When cooling demand is terminated, a 5 minute minimum
off time delay is initiated.
Second stage cooling is energized when the discharge air
temperature is 7°F higher than the set point of the cooling
staging temperature settings.
Heating Operation Conventional Heat/Cool and Heat
Pump Systems
When a zone thermostat makes a demand for heating,
the zone damper opens and heating equipment begins
operating. Heating demand is terminated when:
1. All zone demands for heating are terminated.
2. The demand has exceeded the heat/cool changeover
time limit (20 minutes) while a cooling demand exists.

Lennox iHarmony 10C16 Specifications

General

Brand	Lennox
Model	iHarmony 10C16
Category	Control Unit
Language	English