14
T500 Series Programmable Thermostats Product/Technical Bulletin
C
ommissioning
The thermostat normally displays room temperature
and mode of operation (whether cooling or heating
is currently on).
Table 6: LED Indicators (T500MSP-1, T500HPP-1 only)
LED Position
Function
Left
An external switch on the LED 1 Display enables the filter symbol; see Table 1
Center
(T500HPP-1 only) Indicates when highest stage heat is activated; internally controlled
Right
An external switch on the LED 1 Display enables the wrench symbol; see Table 1
T
hermostat Operation Overview
Mode
Clock
Set Temp
Outdoor
Fan
Program
Resume
Hold
66
12:51
Mo
AM
Used to display outdoor temperature
(optional).
Used to select mode of operation.
Used to run fan continuously.
Used to resume normal operation.
Used to select setpoints.
Used to select event start times.
Used for constant
hold.
setpoint
LEDs (T500MSP-1, T500HPP-1 only) indicate
system activity or problems. See Table 6.
Used to set current day and time.
Piface1
Figure 19: T500 Pushbuttons
