Lennox ComfortSense 7500 Commercial - Stage Delay and Differential Settings; Stage Delay Timer Configuration; Stage Delay Differential Setup

15
Equipment Available
When SSR is enabled then SSR
Stg 2 lock out is automatically
enabled.
When SSR is disabled then SSR Stg 2
lock-out setting is disabled.
Two-stage heat pump
with:
S Two-stages of gas or
oil backup
S Modulation furnace
S Run heat pump (Y1/Y2).
S All backup heat (W1/W2) is
enabled and SSR Stage 2
Lock Out is set between 20 -
120 minutes before the wake-
up set point.
S Run HP (Y1/Y2) until a second-stage
demand is needed which is determined
by the time / temperature differential.
S Heat pump operation will stop and
changeover and lock-in to W1/W2 heat
until set point is reached.
Two stages of gas/oil
heat or modulation
furnace
Run W1 only; W2 is enabled and
SSR Stage 2 Lock Out is set be
tween 20 - 120 minutes before
the wake-up set point.
Run W1 heat and bring on W2 heat until
set point is reached.
Single stage cooling Run Y1 to wake up set point. Run Y1 heat until set point is reached.
Single stage cooling
Run Y1 during recovery and en
able Y2 field wake up set point.
Run Y1 and Y2 heat as needed until set
point is reached.
Stage Delay Timer
Default ON. When ON, all stage delay timers
(stages 2, 3, and 4) 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 temperature to the set point in a
given time. When OFF is selected all stage delay
timers are disabled. This means stages are
changed based on the temperature and not their
timer delays. Scroll to STG DELAY TIMERS; and
touch to select the applicable stage delay timer.
Touch < to return to previous menu.
Stage Delay Differentials
Stage delays and differentials are individual set in
the installer settings screen.
Stage 1 Diff
Stage 1 differential is used in all thermostats. The
default is 1.0°F but can be programmed between
0.5° and 8.0°F in 0.5°F increments. Touch < to return
to previous menu.
Stage 2 Through 4 Diff
(Where applicable) The default is 1.0°F but can be
programmed between 0.5° and 8.0°F in 0.5°F
increments. Touch < to return to previous menu.