Lennox iComfort M30 Installation And Setup Manual page 20

Parameter Name
Stage Delays
H/C STGS Locked In
Stage 2 HP Lock Temp
Table 6. Parameter Descriptions
Definition
There are four settings for this option:
• Stage Delay Timer: The user shall be able to select ON (default) or OFF for stage delay timers.
When OFF is selected all STG DELAYS timers (STG 2 DELAY, STG 3 DELAY, STG 4 DELAY) are
disabled. This means that the stages are changed based on the temperature and not the timer
delays. When ON is selected all STG DELAYS timers are enabled and set to their default values
(20min). If system has only first stage equipment, this item is hidden from installer screen.
• 2nd Stage Delays: The Stage Delay option is enabled when ON is selected from STG Delay
Timers. The second stage delay is used in the multi-stage model only. The default is 20
minutes. If the first stage fails to advance the ambient temperature toward the setpoint by
1.0°F during each consecutive programmed time delay, then the second stage is activated
until demand is satisfied. It can be programmed from 5 to 120 minutes in 5-minute steps. If
system has only first stage equipment, this item is hidden from installer screen.
• 3rd Stage Delays: The Stage Delay option is enabled when ON is selected from STG Delay
Timers. This setting is used with the multi-stage model, in heat pump applications only. The default
is 20 minutes. If the second stage fails to advance the ambient temperature toward the setpoint
by 1.0°F during each consecutive programmed time delay, then the third stage is activated
until demand is satisfied. It can be programmed from 5 to 120 minutes in 5-minute steps. If the
system has no more than three stages, this item is hidden from the installer screen.
• 4th Stage Delays: The Stage Delay option is enabled when ON is selected from STG Delay Timers.
This setting is used with the multistage model, in heat pump applications only. The default is 20 minutes.
If the third stage fails to advance the ambient temperature toward the set point by 1.0°F during each
consecutive programmed time delay, then the fourth stage is activated until demand is satisfied. It can
be programmed from 5 to 120 minutes in 5-minute increments. If the system does not have a fourth
stage, this item is hidden from installer screen. If temperature is stuck at a value lower than the set
point and multiple stages have been turned on because of the delay timers expired (not because of the
temperature), all these stages shall stay on until the required temperature (set point + 0.5) is reached.
The user shall be able to select disable or enable for H/C STGS LOCKED IN mode. In disable, mode different
stages of heat or cool are turned off separately. In enable mode, different stages of heat or cool are turned
off together.
The User shall be able to select the STG 2 HP lock temp from 40F, 45F, 50F, 55F or OFF. The value is used
in dual fuel algorithm to lock the second stage of compressor .The default is OFF which means it is disabled
and is not used in dual fuel algorithm. If system has only 1st stage equipment, this item is hidden from installer
screen. For more information see "Stage 2 HP Lock Temp" on page 28.
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