Checkout - Honeywell T8511 Manual

T8501 AND T8511 DELUXE ELECTRONIC THERMOSTATS
Thermostat Information
1. Press the Information i key to access the thermostat
information.
2. Press the increase
code. The first two large digits are the month and the
third digit is the last digit of the year
(Example: 026=February 1996).
3. Press the increase
identification code. (Example: 02 = software ID code 2).
4. Press the increase
revision number (Example: 001=Revision number 1).
68-0162—1
M4864
key to display the production date
M4865
key again to display the software
M4866
key again to display the software
M6791
5. Press the increase
identification code.
(Example: 222 = EEPROM ID 222).
6. Press and hold the increase
together, until the room temperature is displayed, to exit
the system test. The system test times out after five
minutes without any key presses.

CHECKOUT

Outdoor Temperature Sensor
(where applicable)
Allow the outdoor temperature sensor to soak in the outdoor
air for a minimum of five minutes before taking a reading.
With an accurate thermometer (±1°F [±0.5°C]), measure the
temperature at the sensor location, allowing time for the
thermometer to stabilize before reading. Match the
thermometer reading to the outdoor temperature display at
the thermostat.
To verify the resistance of the sensor, remove one wire from
one of the O terminals. Use an ohmmeter to measure the
T
resistance across the sensor. Then verify sensor accuracy
with the temperature/resistance curve of Fig. 12.
900
800
700
600
500
400
300
200
100
0
0
°F -40 -20
(°C) (-40) (-29) (-18)
Fig. 12. Sensor resistance vs. temperature performance
characteristics.
10
key again to display the EEPROM
M4867
and decrease
60 100
20 40 80
(-7) (4) (16) (27) (38)
OUTDOOR TEMPERATURE
keys
120
(49)
M10172A