User Manual

Siemens Building Technologies Application : 75 RWD82/75 – 04.2001
HVAC Products RWD82 1
RWD82/75
RWD82 Universal Controller
Application 75
Cascade control
Room temperature control
Chilled water control valve-3
p
os
24Vac control system
Control ( P or PI )
Room temperature control
Proportional control ( 3 position ) of the chilled water control valve
Cascade control .
Optional day / night set point adjustment .
S1
X1
X2
D1
Q1
Q2
CP
........RWD82.......
M1
CCV
RWD82/75
X1
X2
S1
Q1
Q2
CCV
PC
Room temperature sensor
Supply air temperature sensor
Time clock or switch
Opening output for CCV
Closing output for CCV
3 - position chilled water control valve.
Personal computer
X1
Universal analogue input - main sensor
Auxiliary analogue input
Digital input
Digital output
Digital output
Communication port
T
X2
T
Room temperature sensor can be selected as Ni1000, Pt1000, or active sensor.
Adjustable proportional band of 3-position output Q1, Q2.
Integral action function selection and adjustment.
Timing of 3-position valve actuator
24Vac controller supply voltage
24Vac three position control valve
Duct temperature sensor can be selected as Ni1000, Pt1000, or active sensor.(X2)
Cascade control of the supply air by the room temperature sensor.
Day / night set points can be selected via time clock or switch.
Supplemental features
Control
Operating modes

Summary of content (3 pages)