Honeywell Prestige 2.0 THX9421 Manual page 136

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THX9321 PRESTIGE 2.0 AND THX9421 PRESTIGE
BACKUP CONTROL
This section explains when backup control is used. For
example, if batteries in the wireless indoor sensors are
depleted.
If the Thermostat is Part of the
Temperature Average
1. The thermostat controls the system using the
remaining sensors that are part of the temperature
average.
2. If there are no remote indoor sensors remaining, the
thermostat controls the system using its internal
sensor.
3. If the internal thermostat sensor is not available and
a Return Air Sensor is connected, the Backup Control
in the EIM is used. The backup control maintains 55
°F in heat, 85 °F in cool and operates the fan contin-
uously to sense and control temperature.
If the Thermostat is NOT Part of the
Temperature Average
1. The thermostat controls the system using the
remaining sensors that are part of the temperature
average.
2. If there are no remote indoor sensors remaining and
a Return Air Sensor is connected, the Backup Control
in the EIM is used. The backup control maintains 55
°F in heat, 85 °F in cool and operates the fan contin-
uously to sense and control temperature.
REPLACING A THERMOSTAT
When you replace a thermostat, you must reset the
RedLINK accessories before connecting them to the new
thermostat.
Follow the instructions below:
At the Equipment Interface Module (EIM)
1. Press and hold the CONNECT button on the EIM
until the CONNECTED LED glows amber (hold for
about 10 seconds).
2. Follow the prompts on the screen to connect the new
thermostat to the EIM. See page 10.
68-0311—07
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IAQ WITH EIM
At the Portable Comfort Control
1. Press and hold the blank space (or arrow) in the
lower right hand corner of the screen until the dis-
play changes (hold for about 4 seconds).
2. Press REMOVE, then YES to disconnect from the old
thermostats.
3. To reconnect the thermostat, go to "Linking
RedLINK™ Accessories" beginning on page 16.
At the Indoor Sensor, RedLINK Internet
Gateway, Entry/Exit Remote, Vent-Filter
Boost Remote or TrueSTEAM Wireless
Adapter
1. Press and hold the CONNECT button on the acces-
sory until the status light glows amber (hold for
about 10 seconds).
2. To reconnect the thermostat, go to "Linking
RedLINK™ Accessories" beginning on page 16.
REPLACING AN EQUIPMENT
INTERFACE MODULE
When you replace an EIM, you must reset the RedLINK
accessories before connecting them to the new
thermostat.
Follow the instructions below:
At the thermostat
1. Press MENU, scroll down and select Installer
Options, enter the password (Date Code) when
prompted, scroll down and select Wireless Manager,
scroll down and select Remove Device, then select
This Thermostat.
2. Follow the prompts on the screen to connect the
thermostat to the new EIM.
136
Press and hold
the blank space
(or arrow may be
present)
Fig. 321.