Stage Inhibits; Aggressive Recovery; System Mode; Fan Mode - Trane 824 Comfort Control Installation Manual

Installation Guide
6.6

Stage Inhibits

When the stage threshold is exceeded, a stage inhibit is
applied. The stage inhibit calculates the rate of recovery
over a 10-minute period and determines if the next stage is
required to meet the current demand. If the rate of recovery
is great enough, then a new 10-minute inhibit is enabled.
The Control will not go to the next stage of operation until it
determines that the current stage cannot satisfy the current
demand. Stage inhibits only apply between compressor
stages and compressor heat to indoor heat. Stage inhibits
do not apply to indoor heat stages.
Stage Inhibits - Compressor Staging
Y1 "ON"
LV = 110
START INHIBIT
10 Minutes
LOAD VALUE (LV)
Stage Inhibits - Compressor to Aux Heat
Y1 "ON"
LV = 115
START INHIBIT
10 Minutes
LOAD VALUE (LV)
Stage Inhibits - Duel Fuel
Y1 "ON"
LV = 125
START INHIBIT
10 Minutes
LOAD VALUE (LV)
Stage inhibits can be disabled in the 824 Control Installer
Settings>Advanced>Comfort. Options are below:
6.7

Aggressive recovery

• Disables stage inhibits in heating and cooling mode
anytime the set point is adjusted more than 2°F
• Heating Aggressive Recovery
• Disable stage inhibit in heating mode only when the
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Y2 "ON" Y1 "ON"
LV = 100
W1 "ON" W1 "OFF"
LV = 100
Y1 "ON"
45 Second
Cool Down
W1 "ON"
LV = 100
outdoor temperature falls below the selected outdoor
temperature
6.8

System Mode

• The 824 has (5) System Modes which can be
selected...Heating, Cooling, Off, Emergency Heating
and Auto.
• Heating – System will only operate in heating mode
• Cooling – System will only operate in the cooling
mode
• Off – System will not operate in heating or cooling
mode
• Emergency Heating – System will operate the indoor
heat source only (this is only available when the
outdoor unit type is a heat pump)
• Auto - The control will determine which mode of
operation by the following rules:
• Heat - Indoor temperature is equal or less than
heating set point
• Cooling – Indoor temperature is within 1°F of cooling
set point
There is minimum deadband between heating and cooling
set points of 4°F
6.9

Fan Mode

The 824 has three Fan Modes:
• Auto – Fan only runs with a call for heating or cooling
• On – Fan runs continuous
• Circ – Fan runs a user selected minimum amount of
time each hour

6.10 Air Cleaner Mode

The 824 has three Air Cleaner modes:
• Auto – Air cleaner operates only with a call for fan
operation
• Quick – Air cleaner will operate for 3-hours
• Allergy – Air cleaner will operate for 24-hours
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