Lennox iComfort S30 Installation And Setup Manual page 23

Parameter Description
Options are Staged, Load Tracking Variable Capacity and Variable Capacity. Default is Staged.
Staged: Some furnaces can be configured to provide up to four stages of gas heat operation. When staged heating is chosen, the iComfort thermostat allows you to
choose between 1, 2, 3 and 4 stages of heat. Single-stage heat: first stage provides 100% of full capacity.
• Two-stage heat: First stage provides 70% of full capacity; 2nd stage provides 100% of full capacity.
Gas Heat Control
• Three-stage heat: First stage provides 60% of full capacity; 2nd stage provides 80% of full capacity; third stage provides 100% of full capacity.
Mode
• Four-stage heat: First stage provides 35 or 40% of full capacity; second stage provides 60% of full capacity; third stage provides 80% of full capacity; fourth stage
(SLP98 only)
provides 100% of full capacity.
Load Tracking Variable Capacity: Load tracking variable capacity will smoothly track the load (sensible temperature changes) up and down and adjust the furnace
heating rate both ways.
Variable Capacity: Variable capacity only tracks the load upward (rising temperature). Variable capacity uses the thermostat stage differentials but not stage timers.
Gas Heating
Activation Temp When the system is dual-fuel and steady state while operating at full HP demand, this is the amount of °F (°C) below the set point that is allowed before allowing to switch
Difference
to gas heat.
(Lennox Modulating
Range is 0.5 to 10°F (0.0 to -5.56°C). Default is 1.5°F (1.30°C). Adjustments are in increments of 0.5°F (0.14°C).
Heat Pumps)
Heat Cool Stages Locked In
Heat Cool (H/C) Stages Lock in default is disabled (heat/cool stages are turned off separately). If changed to Enabled, heat/cool stages are turned off together. For non-variable speed systems
only.
Table 4. Smart Hub Parameters
Cooling (1- and 2-Stages)
H/C
1st stage
Stages
OFF
Stg1 Differential
Locked =
Disabled 2nd stage
OFF
H/C
1st stage
Stages
OFF
Stg1 Differential
Locked =
2nd stage
Enabled
OFF
POINTS: SP -1.5 SP -1.0 SP -0.5
Heating - Non-Heat Pump or Heat Pump w/o backup heat - 1 or 2 stages
H/C
Stages
Locked =
2nd stage
NO
ON
H/C
Stages
Locked =
2nd stage
YES
ON
SP -3.0 SP -2.5 SP -2.0 SP -1.5
POINTS:
1st stage
ON
2nd stage
ON
Stg2 Differential
1st stage
ON
2nd stage
ON
Stg2 Differential
SP S P + 0 5 . SP +1.0 SP +1.5
1st stage
ON
Stg1 Differential
2nd stage
OFF
Stg2 Differential
1st stage
ON
Stg1 Differential
Stg2 Differential
SP
SP -1.0 SP -0.5 SP +0.5
23
S P + 2 0 .
1st
stage
OFF
1st
stage
OFF
2nd
stage
OFF