Geothermal Radiant Heat - Honeywell Home VisionPRO 8000 Manual

Alert Light - General
An alert light is located in the lower right corner of the
thermostat. See Fig. 78 and 79. This light turns red when
an alert is active or the system is set to the Em. Heat mode.
The alert light is on continuous when the thermostat is
system powered (C Wire) and flashes if the thermostat is
battery powered.
Alert Light - Heat Pump Systems
When the L terminal is wired to a compressor monitor and
it receives 24 volts, the alert light on the thermostat will
turn red to indicate a system problem. The thermostat
monitors 24 volts on the L terminal in Heat, Cool and Auto
modes.
Alert Light - Emergency Heat Indication
When the thermostat is setup for a Heat Pump with an
Auxiliary Heat source, the alert light will turn red when the
user sets the system to the Em. Heat mode. It is normal for
the alert light to turn red in the Em. Heat mode to remind
the user that they are currently operating their Emergency
Heat and the Heat Pump is locked out.

Geothermal Radiant Heat

The thermostat can be setup to control Geothermal
Radiant Heat, Geothermal Forced Air Heat and Backup
Heat, all from one thermostat. The thermostat stages the
equipment starting with the Geothermal Radiant Heat
followed by Geothermal Forced Air Heat and then Backup
Heat as needed to maintain the desired temperature. The
thermostat allows you to set differential temperature
settings between each stage if you want the equipment to
stage a certain way (see ISU 303 to ISU 309, page 28). For
additional wiring diagrams, see "Wiring" beginning on
page 118.
NOTE: To turn off Radiant Heat during the shoulder sea-
sons, install an outdoor reset control and connect
to the Radiant Heat or switch the thermostat to
Emergency Heat mode.
Electric Backup Heat (Backup Heat
Allowed to Run with Heat Pump)
HEAT MODE
The thermostat turns on Backup Heat only when the indoor
temperature drops to the selected Backup Heat Droop
setting or the Backup Heat Upstage Timer expires
(whichever occurs first). Geothermal Radiant Heat and
Geothermal Forced Air Heat stay on when the Backup Heat
turns on.
EMERGENCY HEAT MODE
The thermostat turns on the Backup Heat to maintain the
desired temperature setting. Geothermal Radiant Heat and
Geothermal Forced Air Heat are not used.
Fossil Fuel Backup Heat (Backup Heat
NOT Allowed to Run with Heat Pump)
HEAT MODE
The thermostat turns on Backup Heat only when the indoor
temperature drops to the selected Backup Heat Droop
setting or the Backup Heat Upstage Timer expires
(whichever occurs first). Geothermal Forced Air Heat turns
off when the Backup Heat turns on. Geothermal Radiant
Heat stays on when the Backup Heat turns on.
EMERGENCY HEAT MODE
The thermostat turns on the Backup Heat to maintain the
desired temperature setting. Geothermal Radiant Heat and
Geothermal Forced Air Heat are not used.
Set Up Geothermal Radiant Heat
1. Select Geothermal Radiant Heat as shown in
Fig. 169.
2. Select the number of Radiant Heat Stages. See
Fig. 170.
3. Select the terminals wired to the Geothermal Radiant
Heat. See Fig. 171.
79
®
VISIONPRO 8000 WITH REDLINK™
Fig. 169.
Fig. 170.
Fig. 171.
68-0312—06