User Manual

Document No. 125-1009
Installation Instructions
April 27, 2020
Page 14 of 21 Siemens Industry, Inc.
Recovering a Lost Password
If either of the default passwords is changed, the new
password(s) should be recorded and maintained for
future reference. If the records are misplaced, the
following procedure can be used to set new passwords:
1. Cycle power to the thermostat. This can be done
by loosening the securing screws on the bottom
of the housing and momentarily separating the
thermostat from the base plate.
2. Within 80 seconds of restoring power, navigate
to the Installer Set-up screen and enter 98:21 as
the password.
3. The thermostat will go directly to the Expert
Level password screen. A new Expert Level
password can now be set.
4. After setting a new Expert Level password, the
thermostat will return to the Home screen.
5. The new Expert Level password can be used to
enter the full Expert Level set-up menu where
both the Expert Level and Installer Level
passwords can now be set to new values.
Table 7. 500 Series Expert Settings Parameters.
(Only available if logged in as an Expert.)
NOTE: P500 Series parameters are factory-set for optimum system performance. Changing these settings may degrade
efficiency and/or compromise occupant comfort.
Parameter
Definition
Display
Value Range
Default
Extended Definition
P501
Interstage Delay - Cooling
STG DLY CL
1 to 10 minutes
5
Time delay before next stage of cooling will be
activated.
P502
Interstage Differential - Cooling
STG DIF CL
1°F (0.5°C) to
10°F (5.0°C)
1°F
Degrees above cooling deadband before Stage
Delay timer is initiated.
P503
Cooling Minimum Off Time
M O T CL
1 to 10 minutes
5
Minimum time between compressor starts.
P504
Cooling Minimum On Time
M R T CL
1 to 10 minutes
3
Minimum run time for any stage of cooling.
P505
Changeover Delay
C-O DLY
1 to 60
10
Delay in minutes before system will automatically
switch from heating to cooling (or vice versa).
P506
Cooling Deadband
CL DEADBND
1°F (0.5°C) to
5°F (4.0°C)
1°F
The deadband is divided equally above and below
setpoint. Cooling will begin when temperature
exceeds upper point of deadband and ceases
when temperature falls below lower point of
deadband.
P507
Interstage Delay - Heating
STG DLY HT
1 to 10 minutes
5
Time delay before next stage of heating will be
activated.
P508
Interstage Differential - Heating
STG DIF HT
1°F (0.5°C) to
5°F (5.0°C)
Conv. = 1°F
(0.5°C)
HP = 2°F
(1.0°C)
Degrees below heating deadband before Stage
Delay timer is initiated.
P509
Heating Minimum Off Time
M O T HT
1 to 10 minutes
5
Minimum time between heating starts.
P510
Heating Minimum On Time
M R T HT
1 to 10 minutes
Conv = 3
HP = 10
Minimum run time for any stage of heating.
P511
Heating Deadband
HT DEADBND
1°F (0.5°C) to
5°F (4.0°C)
1°F
(0.5°C)
The deadband is divided equally above and below
setpoint. Heating will begin when temperature
falls below lower point of deadband and ceases
when temperature rises above upper port of
deadband.