Document No. 129-905
Installation Instructions
March 26, 2015
Page 12 of 18
Siemens Industry, Inc.
Table 6. 400 Series Parameters.
Parameter
Definition
Display
Value
Range
Default
Extended Definition
Notes
P401
Unit Number
UNIT NMBR
1 to 999
---
Allows HVAC unit number to be
displayed on thermostat home screen.
P402
CO2 Setpoint
CO2 SET PT
500 to
2000
PPM
800
If CO2 level, as measured by an
external sensor exceeds setpoint, the
Ventilation sequence is initiated.
For optimum human
performance, CO2 levels
should be kept below 1000
parts per million.
P403
Pre-
Occupancy
Purge
PRE OC PRG
0
1
2
3
hours
0
0 = Disabled
1 = 1 Hour
2 = 2 Hours
3 = 3 Hours
Pre-Occupancy Purge will
energize the Economizer
Enable and Fan relays prior
to the start of the first
scheduled occupancy period.
Not applicable to systems
without a schedule.
P404
Occupancy
Sensor Min
Run Timer
OCC MRT
3 to 60
minutes
30
Minimum run time to remain in
Occupied mode upon receipt of signal
from Occupancy Sensor.
Only shown if an input is set
to Occupancy Sensor.
P405
Semi-
Continuous
Fan
CONT FAN
No
Yes
NO
Fan relay will be continuously energized
when space is occupied, as determined
by schedule or external Occupancy
Sensor.
Only shown if a schedule is
present or if an input is
configured for Occupancy
Sensor.
P407
Installer
Password
INSTALL PW
00:00 to
49.99
00:00
NOTE:
If Installer Password is changed, a new password should be
recorded for future reference.
P701
Firmware
Revision
FIRMWARE
X.X
N/A
Read Only
Expert Level Menus
1. Touch the center of the Home screen.
2. Press the
Settings icon
[
].
SCHEDULER
displays.
3. Press the left [
] arrow.
4. Press
INSTALLER
.
5. Using the lower left [
] and right [
] arrows,
enter the password.
6. Press
PASSWORD
to accept the password and
return the unit to the Setup Menu.
NOTE:
The Expert Level default password is
99:99
.
7. See Table 3 through Table 8 and
Wiring
Diagrams
for additional information.
8. Press the
Settings icon
[
] to accept changes
and return the unit to the Home screen.
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 50 seconds of restoring power, navigate
to the Installer Set-up screen and enter
98:21
as
the passcode.
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.
