User Manual

Document No. 125-1009
Installation Instructions
April 27, 2020
Page 16 of 21 Siemens Industry, Inc.
Auxiliary Sequences
The RDY2000BN primary sequences are designed to
control single and multi-stage heating/cooling systems to
maintain a user-selected temperature setpoint.
The following auxiliary sequences are available to
optimize occupant comfort and system efficiency:
Humidification
Parameters
• P317/ P318/P319: One of these must be set to 1
• P320: NO (default) = Humidification will only
occur if there is a call for heating. YES =
Humidification relay will be energized
independently of heating and cooling relays.
• Humidity Setpoint: User adjustable to desired
level in humidification mode.
Sensors: Onboard humidity sensor or optional remote
humidity sensor.
The humidification relay will energize when measured
humidity drops approximately 4% below setpoint and will
de-energize when measured humidity reaches setpoint.
Deadbands and proof timers are in force to prevent short
cycling.
Table 10. 900 Series Expert Settings Parameters.
(Only available if logged in as an Expert.)
CAUTION:
P900 Series parameters are used by professional HVAC technicians during the system commissioning
process. Interlocks and time delays are defeated while using P900 parameters. Use of these parameters by
non-qualified personnel may result in equipment damage.
Parameter
Definition
Display
Value Range
Default
Extended Definition
P901
Test Compressor 1
Y1 Test
1=OFF
0=ON
OFF
OFF = Relay not energized
ON = Relay energized
P902
Test Compressor 2
Y2 Test
1=OFF
0=ON
OFF
OFF = Relay not energized
ON = Relay energized
P903
Test Reversing Valve
O/B TEST
1=OFF
0=ON
OFF
OFF = Relay not energized
ON = Relay energized
P904
Test Fan
G Test
1=OFF
0=ON
OFF
OFF = Relay not energized
ON = Relay energized
P905
Test Heat Stg 1
W1 Test
1=OFF
0=ON
OFF
OFF = Relay not energized
ON = Relay energized
P906
Test Heat Stg 2
W2 Test
1=OFF
0=ON
OFF
OFF = Relay not energized
ON = Relay energized
P907
Test Output 1
OUT1 TST
1=OFF
0=ON
OFF
OFF = Relay not energized
ON = Relay energized
P908
Test Output 2
OUT2 TST
1=OFF
0=ON
OFF
OFF = Relay not energized
ON = Relay energized
P909
Test Output 3
OUT3 TST
1=OFF
0=ON
OFF
OFF = Relay not energized
ON = Relay energized
P911
Expert Password
XPRT PW
5000 -- 9999
Current PW
P999
Restore Factory
Defaults
RESTORE
0=No
1=Yes
No