Lennox CS7500 User Manual

16
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:
• Two-stages of gas or
• Oil backup
• Modulation furnace
• Run heat pump (Y1/Y2).
• All backup heat (W1/W2) is enabled
and SSR Stage 2 Lock Out is set
between 20 - 120 minutes before
the wakeup set point.
• Run HP (Y1/Y2) until a second-
stage demand is needed which
is determined by the time /
temperature di󰀨erential.
• 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
between 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 until set point is reached.
Two stage cooling • Run Y1 during recovery and enable
Y2 eld wake up set point.
• Run Y1 and Y2 as needed until set
point is reached.
Three stage cooling • Run Y1 during recovery and enable
Y2 and Y3 at eld wake up set
point.
• Run Y1, Y2, and Y3 as needed until
set point is reached.
Stage Delay Timer
Default ON. When ON, all stage delay timers (stag-
es 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 Di󰀨erentials
Stage delays and di󰀨erentials are individual set in
the installer settings screen.
Stage 1 Di󰀨erential
Stage 1 di󰀨erential 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 Di󰀨erential
(Where applicable) The default is 1.0°F but can be
programmed between 0.5° and 8.0°F in 0.5°F incre-
ments. Touch < to return to previous menu.

Lennox CS7500 Specifications

General

Brand	Lennox
Model	CS7500
Category	Thermostat
Language	English