Lennox ComfortSense 7500 Commercial - Page 14

14
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.
Single-stage heat pump
with single-stage gas or
oil backup
S Run heat pump (Y1) only
S All backup heat (W1) is en
abled and SSR Stage 2 Lock
Out is set between 20 - 120
minutes before the wake-up
set point.
S Run heat pump (Y1) until a second-
stage heating demand is needed which
is determined by the time / temperature
differential.
S Heat pump operation will stop and gas
or oil heat will start.
S Changeover and lock-in to W1 heat will
occur until set point reached.
Single-stage heat pump
with:
S Two-stages of gas or
oil backup
S Modulation furnace
S Run heat pump (Y1) only
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 heat pump (Y1) until a second-
stage heating demand is needed which
is determined by the time / temperature
differential.
S Heat pump operation will stop and
changeover to W1/W2 heat as needed
S Lock-in W1/W2 heat until set point is
reached.
Two-stage heat pump
with one stage gas/oil
backup
S Run heat pump (Y1/Y2) only.
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 heat pump (Y1/Y2) until a
second-stage demand is needed which
is determined by the time / temperature
differential.
S Heat pump operation will stop and gas
or oil heat will start.
S Changeover and lock-in to W1 heat will
occur until set point is reached