Siemens RDY2000BN Installation Instructions Manual page 13

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.
NOTE: P500 Series parameters are factory-set for optimum system performance. Changing these settings may degrade
efficiency and/or compromise occupant comfort.
Parameter Definition
P501 Interstage Delay - Cooling
P502 Interstage Differential - Cooling
P503 Cooling Minimum Off Time
P504 Cooling Minimum On Time
P505 Changeover Delay
P506 Cooling Deadband
P507 Interstage Delay - Heating
P508 Interstage Differential - Heating
P509 Heating Minimum Off Time
P510 Heating Minimum On Time
P511 Heating Deadband
Siemens Industry, Inc.
Table 7. 500 Series Expert Settings Parameters.
(Only available if logged in as an Expert.)
Display Value Range
STG DLY CL 1 to 10 minutes
1°F (0.5°C) to
STG DIF CL
10°F (5.0°C)
M O T CL 1 to 10 minutes
M R T CL 1 to 10 minutes
C-O DLY 1 to 60
1°F (0.5°C) to
CL DEADBND
5°F (4.0°C)
STG DLY HT 1 to 10 minutes
1°F (0.5°C) to
STG DIF HT
5°F (5.0°C)
M O T HT 1 to 10 minutes
M R T HT 1 to 10 minutes
1°F (0.5°C) to
HT DEADBND
5°F (4.0°C)
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.
Default
Time delay before next stage of cooling will be
5
activated.
Degrees above cooling deadband before Stage
1°F
Delay timer is initiated.
5 Minimum time between compressor starts.
3 Minimum run time for any stage of cooling.
Delay in minutes before system will automatically
10
switch from heating to cooling (or vice versa).
The deadband is divided equally above and below
setpoint. Cooling will begin when temperature
1°F exceeds upper point of deadband and ceases
when temperature falls below lower point of
deadband.
Time delay before next stage of heating will be
5
activated.
Conv. = 1°F
(0.5°C) Degrees below heating deadband before Stage
HP = 2°F Delay timer is initiated.
(1.0°C)
5 Minimum time between heating starts.
Conv = 3
Minimum run time for any stage of heating.
HP = 10
The deadband is divided equally above and below
setpoint. Heating will begin when temperature
1°F
falls below lower point of deadband and ceases
(0.5°C)
when temperature rises above upper port of
deadband.
Document No. 125-1009
Installation Instructions
February 10, 2020
Extended Definition
Page 13 of 20