
VISIONPRO
®
8000 WITH REDLINK™
68-0312—03
122
Typical wiring for geothermal radiant heat, geothermal forced-air, and backup heat with one transformer.
Fig. 316. EIM wiring guide — geothermal radiant heat.
1U1, U2 or U3 terminals must be used for geothermal radiant heat (ISU 201). Thermostat allows 2 stages of radiant heat—geo-
thermal (stage 1) and boiler (stage 2).
2“U” terminals are normally open dry contacts when set up for geothermal radiant heat. You must install a field jumper if radiant
heat is powered by system transformer. Do NOT install a field jumper if radiant heat has its own transformer.
3L/A terminal sends continuous output when thermostat is set to EM HEAT mode except when set up for Economizer or TOD. See
“Economizer Module Wiring Diagrams” beginning on page 132.
4Wire a maximum of 4 sensors using the S1-S4 terminals. S1-S4 terminals can be connected to an indoor sensor, outdoor sensor,
discharge sensor, return sensor, dry contact device to display an alert or an occupancy sensor for remote setback.
5Connect wireless adapter to ABCD for extended wireless range.
NOTE: For setup and operation, see “Geothermal Radiant Heat” beginning on page 78.
O/B
AUX1
AUX2
O/B
R
C
AUX1
AUX2
G
L
Y2
Y
L/A
CHANGEOVER VALVE
BACKUP HEAT
STAGE 1
FAN RELAY
120
VAC
24
VAC
COMPRESSOR
STAGE 1
COMPRESSOR
STAGE 2
BACKUP HEAT
STAGE 2
COMPRESSOR MONITOR
OR ZONE PANEL
GEOTHERMAL RADIANT
HEAT STAGE 1
AIR HANDLER
TRANSFORMER
STATUS
LEDS
JUMPERS
OPTIONAL
JUMPER
POWER
HEAT
COOL
FAN
U1
U2
U3
TO THERMOSTAT
HEAT PUMP
EIM
3
1
3
S4
S4
S3
S3
CONNECT OPTIONAL
SENSORS TO
S3 AND S4 TERMINALS
A
B
C
D
4
SENSORS
2
CONNECT OPTIONAL
SENSORS TO
S1 AND S2 TERMINALS
4
2
5