Lennox ComfortSense L7742U User Manual

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ComfortSenset Model L7742U Touch Screen 7−Day Programmable Thermostat
Options tabInstaller Settings (continued)
Table 1. Smooth Set back Recovery (SSR) & SSR Stg 2 Lock Out Operation
Equipment Available SSR = Enabled; SSR Stg 2 lock out = enabled SSR = Enabled; SSR Stg 2 lock−out = disabled (off)
1 stage HP with 1 or 2 stages
elec backup
Run HP (Y1) only; all backup heat (W1/W2) enabled 20
− 120 min before wake up setpoint
Run HP (Y1) and have available backup heat (W1/W2) as needed.
2 stage HP with 1 or 2 stages
elec backup
Run HP (Y1/Y2) only; all backup heat (W1/W2) enabled
20 − 120 min before wake up setpoint
Run HP (Y1/Y2) and have available backup heat (W1/W2) as needed.
1 stage HP with 1 stage gas/oil
backup
Run HP (Y1) only; all backup heat (W1) enabled 20 −
120 min before wake up setpoint
Run HP (Y1) until a 2nd stage demand is needed (by time/temp. differential); then HP
operation must stop and changeover and lock in to W1 heat until setpoint reached.
1 stage HP with 2 stages gas/oil
backup or modulation furnace
Run HP (Y1) only; all backup heat (W1/W2) enabled 20
− 120 min before wake up setpoint
Run HP (Y1) until a 2nd stage demand is needed (by time/temp differential); then HP
operation must stop and changeover to W1/W2 heat as needed; lock in W1/W2heat
until setpoint reached.
2 stage HP with 1 stage gas/oil
backup
Run HP (Y1/Y2) only; all backup heat (W1/W2) enabled
20 − 120 min before wake up setpoint
Run HP (Y1/Y2) until a 2nd stage demand is needed (by time/temp. differential); then
HP operation must stop & changeover and lock in to W1 heat until setpoint reached
2 stage HP with 2 stages gas/oil
backup or modulation furnace
Run HP (Y1/Y2), all backup heat (W1/W2) enabled 20 −
120 min before wake up setpoint
Run HP (Y1/Y2) until a 2nd stage demand is needed (by time/temp. differential); then
HP operation must stop & changeover and lock in to W1/W2 heat until setpoint
reached.
2 stages gas/oil heat or modula-
tion furnace
Run W1 only; W2 enabled 20 − 120 min before wake up
setpoint
Run W1 heat and bring on W2 heat until setpoint reached.
1 stage cooling Run Y1 to wake up set point Run Y1 heat until setpoint reached.
2 stage cooling Run Y1 during recovery enable Y2 field wake up set
point
Run Y1 & Y2 heat as needed until setpoint reached.

Lennox ComfortSense L7742U Specifications

General

Brand	Lennox
Model	ComfortSense L7742U
Category	Thermostat
Language	English