Data Sheet for Product

Polygyr-Compact Discharge Air Temperature Controller Technical Instructions
Document Number CM1N3406E-P25
Rev. 1, February, 2000
Siemens Building Technologies, Inc.
Page 3
Design Features,
Continued
1 Connecting terminals
2 Slider for setting the desired value
3 Setting scale
4 Selector switch for mode of operation
5 Setting potentiometer for P band
6 Mounting flange
7 Flexible sensing element
8 Service plug
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 sensing element 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 RCM61.12 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 s 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.