Polygyr-Compact Discharge Air Temperature Controller
Technical Instructions
Document Number CM1N3407E-P25
Rev. 1, February, 2000
Siemens Building Technologies, Inc.
Page 3
Design Features,
Continued
1 Connecting
terminals
2 Setting
potentiometer for
P band
3 Slider for setting
the desired value
4 Setting scale
5 Service plug
6 Mounting flange
7 Flexible sensing
element
Figure 2.
The scale and slider for setting the desired temperature can be seen through a window
in the cover. Knock-out holes (Pg11) provide entry for the cables.
After fitting the mounting flange to the duct wall, the controller can be installed in seven
different positions so that, with layers of insulation up to 2.76 inches, the controller
housing will not be insulated.
The detector can be bent and adapted to the shape of the duct. It senses the average
temperature in the duct because the measuring element (Ni wire) extends over the total
length of the flexible sensing element.
Unit Combinations
The RCM61.22 can control various units with the following characteristics:
•
Type of control
10 Vdc
•
Operating
voltage
24
Vac
Remote Setting Units
The FZA21.11 remote setting unit is used for remote setting of the desired value.
Specifications
Operating voltage
24 Vac ± 20%
Frequency
50 – 60 Hz
Power consumption
1 VA
Control signal:
Voltage
0 – 10 Vdc, continuous
Current
1 mA
Integral action time
2 minutes
Measuring element
LG-Ni 1000
Ω
@ 32°F (0°C)
Time constant
30 seconds at 6.5 ft/s
Setting ranges
Set point
32 – 122°F (0 – 50°C)
Proportional band Xp
4 – 100 % 3.6 - 90°F
Permissible ambient temperature:
Operation
14 – 122°F (-10 – 50°C)
Transport and storage
-13 – 149°F (-25 – 65°C)
Cable entry fitting
Pg11
Connecting terminals
for 2 x 14 AWG or 1 x 12 AWG
Weight
0.55 lb.
