Lennox icomfort Touch - Setting up Equipment parameters; Stage Delay & Differential Settings (Installer settings)

506566−01 09/10
Page 12
Setting up Equipment parameters
This feature allows the installer to edit details of devices in the
system without having to re−run the setup program. When the
press start..." screen appears, press start. The Equipment
details edit" screen (figure 30) will open. You may view infor-
mation about or modify communicating devices as described
earlier in the setup pages, beginning on page 10. Use the ar-
rows to select a device and press edit.
next step
edit
reset all
about
setup tests equipment HELP
to adjust a device,
highlight it, then press
edit
system devices
press start button below to edit details of devices
in the system
start
HP
XP17−036−230−01
5910M12345
Furnace
SLP98UH−
090V36C−01
5910G17546
Thermostat
49W95
A110A00070
Figure 30. Equipment details edit
Use the arrows to highlight a settings and then press edit (fig-
ure 31). In the example (figure 32), the heating airflow may be
changed from the default (Fixed CFM) to Fixed DAT. If you
make a change, press save.
Changes may affect other settings and, if so, those setting will
appear in red and require changing/saving to clear the red
settings.
setup tests equipment HELP
Equipment Name
Heating Airflow
Control Type
Low Heating
Airflow
High Heating
Airflow
to adjust a setting, high-
light it, then press edit
Current Value:
Fixed CFM
Furnace
back
edit reset
Figure 31. Equipment details edit
default is underlined
current value is checked
savecancel
Fixed CFM
Fixed DAT
Figure 32. Changing a device’s setting
Table 2 on (on Page 21) shows a list of Editable Parameters
for the currently available devices designed to communicate
in this system. Other devices and additional parameters may
be added at a later date. Check the unit installation manuals
(i.e. furnace, air handler, heat pump, ac unit) for current infor-
mation and default parameters.
Stage Delay & Differential Settings (Installer
settings)
1st Stage DifferentialStage 1 differential is used in all ther-
mostats. The default is 1.0°F but can be programmed be-
tween 0.5° and 3.0°F in 0.5°F increments.
From the equipment tab, use the arrows to select 1st Stage
Differential. Press edit. Use the up/down arrows to adjust to
the desired setting and press save.
2nd Stage Differential (where applicable)The default is
1.0°F but can be programmed between 0.5° and 8.0°F in
0.5°F increments.
3rd Stage Differential through 6th Stage Differential
(where applicable)The default is 0.5°F but can be pro-
grammed between 0.5°F and 8.0°F in 0.5°F increments.
NOTE − Each stage’s differential is based on the previous
stage’s differential endpoint. For example, in cooling mode, if
stage 1 differential is set to 1.0ºF, then the system comes on
0.5ºF above setpoint and the 2nd differential starts at the
0.5ºF stage 1 endpoint and extends to 2nd stage differential
endpoint.
NOTE − In normal operation, the end of the cooling demand is
at the setpoint −0.5ºF and the end of the heating demand is at
the setpoint + 0.5ºF.
Staged Delay Timersdefault Enabled. When ON, all stage
delay timers (stages 2 through 6) are enabled and will serve to
bring on additional stage(s) of cooling or heating on a timed
basis (default 20 minutes) in cases when the previous stage
of heating or cooling will not raise or lower the room tempera-
ture to the set point in a given time.
When Disabled is selected all stage delay timers are dis-
abled. This means stages are changed based on the temper-
ature and not their timer delays.
NOTE − The 2nd Stage Delay Timer (when Staged Delay Tim-
ers is Enabled) is used for both HEATING and COOLING.
However, if the system has a modulating furnace, 2nd Stage
Delay Timer will only be used for COOLING (not for heating,
as the modulating algorithm ignores delay timers).
2nd thru 6th Stage Delay timer (where applicable)If
Staged Delay Timers are Enabled, the default delay is 20 min-
utes but can be programmed from 5 to 120 minutes in 5−min-
ute increments. If first stage fails to advance the ambient tem-
perature toward the setpoint by 1.0°F in the programmed
delay time, then the second stage is activated.
Heat Cool Stages Locked Indefault Disabled (heat/cool
stages are turned off separately). If changed to Enabled,
heat/cool stages are turned off together. Scroll to Heat Cool
Stages Locked In; press edit. Use arrows to select between
Disabled or Enabled. Press save.