Lennox iComfort S30 Installation And Setup Manual page 31

Parameter Description
This screen provides information concerning language supported, equipment type name, unit model number, unit serial number, unit nominal capacity, number of
heating states, number of cooling stages, heating capacity by stage, cooling capacity by stage, control software revision, control model number, control serial number,
About control hardware revision, outdoor air temp sensor, protocol revision number, device product level, 24VAC average power consumption, 24VAC peak power consump-
tion, line voltage average power consumption, line voltage peak power consumption, outdoor inverter model number, outdoor inverter firmware version, outdoor fan
RPM profile, unit code, compatible devices list, application code memory size and micro-controller part number.
When set to ON, the system will always run at MAX DEFROST when accumulated compressor off time is longer than 30 minutes and ambient temperature is less than
Automatic Max
35°F (1.6°C).
Defrost
When ambient sensor temperature is higher than 40°F (4.5°C) then defrost termination will be 90°F (32°C).
(Single and Two-Stage
iComfort Heat Pumps)
This option has two settings, either ON or OFF. Default is OFF.
Compressor Shift
The options are ON or OFF. By default it is set to ON.
Delay ON / OFF
• Shift Delay "OFF" - Compressor will not be cycled "OFF" going in and out of defrost.
(Single and Two-Stage
• Shift Delay "ON" - Compressor will be cycled "OFF" going in and out of defrost.
iComfort Outdoor Units)
Compressor Short
Cycle Delay'
This feature prevents the compressor from being short cycled any time the compressor is turned "OFF".
(Single and Two-Stage
The range is 60 - 300 seconds. Default is 300 seconds and with an incremental adjustment of 60 seconds.
iComfort Outdoor Units)
This is the temperature that defrost mode will be terminated. In dual fuel applications (furnace and heat pump), defrost tempering is automatically enabled and operates
as follows:
• Furnace will run for 75 seconds ON then after 90 seconds OFF for two cycles.
• After the first two cycles, the furnace will run for 60 seconds ON then cycle OFF for 90 seconds.
• This cycle will be repeated unit the room thermostat is informed by the outdoor control that defrost has terminated.
The range is 50 - 100°F (10.0 to 37.78°C). Default is 50°F (10.0°C) and with an incremental adjustment of 10°F (5.56°C).
Modulating - Both Furnace and Heat Pump are Modulating:
When the thermostat receives information that the heat pump has entered defrost the thermostat sends a minimum rate heating demand to the furnace. Then the
thermostat terminates the minimum rate heating demand upon defrost completion or any time the heat pump stops. (i.e., pressure switch opens, mode switch changes,
Defrost Termination
etc.)
Temp
Staged – Both Furnace and Heat Pump are Multi-Stage:
(Single and Two-Stage
iComfort Heat Pumps)
When the thermostat receives information that the heat pump has entered defrost the thermostat performs the following :
• Sends a first stage heating demand to the furnace.
• After 75 seconds elapse from the time the first stage demand was sent, the thermostat terminates the furnace heating demand.
• After the furnace minimum off time has elapsed (90 seconds) from the time the previous heating termination, the thermostat starts first stage furnace heat again by
sending the first stage heating demand. This is the new adjustable gas heat delay setting for zoning.
• After 60 seconds elapse from the previous heating demand being sent, the thermostat terminates the furnace heating demand.
• Repeat steps 3 and 4 while defrost is active, terminating any running furnace heat demand when the HP indicates that defrost is no longer active or any time the heat
pump stops. (i.e., pressure switch opens, mode switch changes, etc.)
NOTE: The on times above assume the minimum furnace ignition time of 35 seconds.
Dehumidification airflow = HUMID Mode CFM table value for a given thermostat demand + dehumidification adjustment adder (High Normal Cooling Airflow CFM x
Dehum Airflow
Dehumidification Airflow Adjustment Adder in percentage.
Adjustment Adder
Both these values are in the installer set up under dealer control center > equipment > heat pump. Range is 0 to 30%. Default is 28%.
(Lennox Modulating
Heat Pumps Only)
NOTE: Deactivated in auxiliary dehumidification and enhanced dehumidification accessory (Humiditrol)
Equipment Name A unique name can be assigned to this component. Name can be up to 29 characters. Name can consist of letters, numbers, special characters and spaces.
High Normal
Cooling Airflow
Thermostat values shown are defaults. This value can be adjusted up or down to meet each application requirements.
(Lennox Modulating
The range is 450 - 2150 CFM. Default is dependent on unit capacity with an incremental adjustment of 25 CFM.
Heat Pumps Only)
Table 5. Heat Pump Parameters
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