User Manual
Siemens Building Technologies Application : 74 RWD32/74 – 04.2001
HVAC Products RWD32 1
RWD32/74
RWD32 Universal Controller
Application 74
Compensation shift
Room temperature control
Chilled water control valve- 3
p
os
230Vac control system
Control ( P or PI )
Room temperature control
Proportional control of the 3 position chilled water valve.
Outside air compensation of the supply air temperature.
Optional day / night set point adjustment .
S1
X1
X2
D1
Q1
Q2
CP
........RWD32.......
M1
CCV
RWD32/74
X1
X2
S1
Q1
Q2
CCV
PC
Room temperature sensor
Outside 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
• 230Vac controller supply voltage
• 230Vac three position control valves
• Outside temperature sensor can be selected as Ni1000, Pt1000, or active sensor.(X2)
• Outside air compensation of the supply air temperature set point.
• Day / night set points can be selected via time clock or switch.
Supplemental features
Control
Operating modes