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7/2013
Page 16
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 jumper.
Heating Operation Conventional Heat/Cool and Heat Pump Systems
When a in-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 (20minutes)
while a cooling demand exists.
When heating demand is terminated, a 5minute minimum off time delay is initiated.
Second-stage heating is energized if the discharge air temperature is lower than the
set point of the heating staging temperature set point.
C. To Adjust Zone Control Settings
Under system devices use the following procedures to adjust various zoning control
parameters (a complete list of all available parameters are listed starting on page
6).
System Devices > System
A complete list of available zoning parameters under
System
is provided in table 2
on page 6.
1. In the
system devices
screen, use the arrows (
A
) to highlight
System
and
press
edit
(
B
).
2. Touch one of the options (
C
) to select for example
Zoning Target Supply Air
Temp for Cooling
Press
edit
(
D
) to continue.
3. Use up or down arrows (
E
) to change the value.
4. Press
save
(F).
system devices
To adjust a setting,
highlight it, then press
Edit
furnace
about
System
Furnace
Thermostat
2 Stage HP Unit
Zoning Control
reset All
edit
System
Equipment Name
Zoning Target Supply Air Temp C
Zoning Target Supply Air Temp fo
Zoning Target Supply Air Temper
Zoning Target Supply Air Temper
Zoning Supply Air Temp Limit for
Zoning Supply Air Temp Limit for
HP heating lockout time
Zoning Target Supply Air temp for
Cooling
1
current value:
edit
Zoning Target Supply Air Temp
for Cooling
set-to
50
cancel
save
C
E
F
reset
9:39 am Aug 15, 2012
A
B
D
Range is 50 to 60
Default is 50, inc: 1
Figure 18. Adjusting System Devices > System Parameters for
iharmony™ Zoning System
System Devices > Zoning Control
system devices
To adjust a setting,
highlight it, then press
Edit
furnace
about
System
Furnace
Thermostat
2 Stage HP Unit
Power (120VAC) Humidifier
Zoning Control
reset All
edit
Zoning Control
Equipment Name
Zone 2 Temp Reading Calibration
Zone 3 Temp Reading Calibration
Zone 4 Temp Reading Calibration
Zone 2 Temp Reading Calibration
1
current value:
edit
Zone 2 Temp Reading Calibration
set-to
1
cancel
save
C
E
F
reset
9:39 am Aug 15, 2012
A
B
D
Range is -5 to 5
Default is 0, inc: 1
1. In the “system devices” screen (figure 19), use the arrows (
A
) to
highlight
Zoning Control
and press
edit
(
B
).
2. Touch one of the options (
C
) to select “Zone 2 Temp Reading Calib
ration”. Press edit (
D
) to continue.
3. Use up or down arrows (
E
) to change the value.
4. Press
save
(
F
).
After completing the
Zone Control
settings press the
back
button to con
tinue. If all system settings have been completed, then from “system
devices” screen, continue by pressing the
next
button. The
Edit and Test
Airflow per Zone
screen will appear.
Figure 19. Adjust Zone Temperature Reading Calibration
