PRODUCT DATA
Copyright © 1996 Honeywell Inc. • • All Rights Reserved
T8141A
Electronic Heat Pump Thermostats
APPLICATION
The T8141A Electronic Heat Pump thermostats provide low
voltage (24 Vac) control of two-stage heating and one-stage
cooling in single speed heat pump systems.
FEATURES
•
24 Vac, 60 Hz direct wired operation.
•
Manual heat-cool changeover.
•
Two heat, one cool output stages.
•
Setpoint temperature range 45
°
F to 90
°
F (7
°
C to 32
°
C)
for heating and 60
°
F to 95
°
F (16
°
C to 35
°
C) for cooling.
•
Retains setpoint temperature during power outage.
•
Cover thermometer.
•
Fan mode selection of AUTO, ON.
•
System mode selections of EM. HEAT, HEAT, OFF,
COOL (some models have EM. HEAT, GEO HEAT, OFF,
GEO COOL).
•
LED display for second stage AUX. HEAT operation.
•
LED display for EM. HEAT selection and external fault
indication (some models have GEO LOCK).
•
EM. HEAT LED can also be powered to light when the
heat pump shuts down.
Contents
Application ...........................................................................
1
Features ..............................................................................
1
Specifications ......................................................................
2
Ordering Information ...........................................................
2
Installation ...........................................................................
3
Setting .................................................................................
6
Operation ............................................................................
7
Checkout .............................................................................
7
Calibration ...........................................................................
7
Troubleshooting ..................................................................
8
68-0169-1
