Outdoor Button - Johnson Controls T500HCP-1 User Manual

Mode
Repeated pressing of the Mode button allows
selection from four modes of operation (five for the
T500HPP-1/Heat Pump model):
•
When the Snowflake
displayed, the thermostat is in the cooling mode.
When the thermostat is calling for cooling, the
snowflake will flash.
•
When the Flame
displayed, the thermostat is in the heating mode.
When the thermostat is calling for heating, the
flame will flash.
•
When the Flame
are displayed, the thermostat will control using the
emergency heat with the compressor locked out.
(T500HPP-1/Heat Pump only.)
•
When the Snowflake
and word AUTO are displayed, the thermostat will
automatically change over between heating and
cooling.
Note: The thermostat never allows less than a 1°C
(2°F) difference between the heating and
cooling setpoints.
•
When OFF is displayed, the equipment will not
operate.
Note: Use caution when using the OFF mode in
extremely cold weather.
Celsius/Fahrenheit
Press the ∨ ∨ ∨ ∨ and ∧ ∧ ∧ ∧ buttons simultaneously to alternate
between Celsius and Fahrenheit display.
F
uzzy Logic Control
Over time, the T500 learns how long it takes the
system to meet the load. If the system can change the
room temperature quickly, the T500 allows the
thermostat to drift further from setpoint before starting
the equipment. If the system takes a longer period of
time to change the room temperature, it will not allow
the temperature to drift as far from setpoint. The T500
also takes into account the minimum On/Off times.
The 2-minute On/Off time allows the equipment to
cycle more frequently at smaller differentials than the
4-minute On/Off time. For multi-stage applications, the
and the word COOL are
and the word HEAT are
and E Ht (emergency heat)
and the Flame symbols
T500 Series Programmable Thermostats Product/Technical Bulletin
T500 does not bring on the next stage of cooling or
heating if it knows that the system can change the
temperature by 6 degrees in 1 hour, or 1 degree in
10 minutes. To verify thermostat operation, force the
next stage on by changing the setpoint more than
2 degrees.
F
an
If continuous fan is not selected, the fan will operate
automatically and the fan symbol will be off. To select
continuous fan operation, press the Fan button. The
fan symbol will be displayed. (See Figure 20.) See
Smart Fan DIP switch in Table 1.
Clock
66
Set Temp
Mo
Program
4:22
Hold
Figure 20: Selecting Continuous Fan Operation

Outdoor Button

When an outdoor temperature sensor (order
separately) is connected to the T500 thermostat, you
can display the current outdoor temperature by
pressing the Outdoor button. If the sensor option is
not connected, the thermostat will display "— —".
See the Ordering Information section.
Outdoor
Mode
Press to
Fan
AM
select
continuous
Resume fan
operation.
15