User Manual

Siemens Building Technologies Application :44 RWD62/44- 05.2001
HVAC Products RWD62 2
The temperature sensor senses the supply air conditions and on a rise in
temperature the RWD62 via Y1 analogue output modulates the chilled water
valve as determined by the cooling set point and proportional band (XP) setting.
The auxiliary temperature sensor (X2) senses the outside air temperature, and
adjusts the supply air temperature set point as per the temperature shift program
set up in the controller.
Cooling sequences
Min V
Ouptut
Voltagee
Cooling Setpoint
Max V
Cool ing
Y1
Load
XP
Y1
G
Y1
S1
D1
GO
Y..
BM
X1 X2MM
RWD62/41
X1
M
M
GO
G
24 V SN
24 V SP
N1
TOOL
PC
G
M
Y2
B
M
G
X2
RWD62
N1 RWD62 controller
X1 Main temperature sensor
X2 Outside air temperature sensor
S1 Time clock or switch
Y1 Cooling control valve with 0..10Vdc input
PC Personal computer
Description of operation
Function diagram
Connection diagram