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Polygyr

-Compact

Technical Instructions

Document No. CM1N3405E-P25

Rev. 1, February, 2000

Exhaust Air Temperature

Controller

Siemens Building Technologies, Inc.

Features

•

Two outputs for heating and cooling

•

Continuous control signal

•

P control

•

Electronic

•

24 Vac

Application

The RCM61.21 is used for controlling exhaust air temperature in smaller ventilating and

air conditioning installations (by heating and cooling).

Application examples:

•

Individual installations, (restaurants, conference rooms, storage rooms, etc.)

•

Parts of larger installations (ancillary air handling units used in conjunction with

central air handling equipment).

The following units can be controlled:

•

Heating and cooling valve actuator

•

Air damper actuator

•

Step controller or current valve for electric air heater battery

•

Signal converter

The temperature controlled by the RCM61.21 can be shifted by:

•

the outdoor temperature to obtain summer/winter compensation.

•

a building automation system to obtain set point adjustment (fixed value shift).

It is also possible to provide low limiting of discharge air temperature.

Product Number

RCM61.21

Ordering

When ordering, specify quantity, product number and description.

Summary of content (6 pages)

PAGE 1
Technical Instructions Document No. CM1N3405E-P25 Rev. 1, February, 2000 Polygyr®-Compact Exhaust Air Temperature Controller Features Application • Two outputs for heating and cooling • Continuous control signal • P control • Electronic • 24 Vac The RCM61.21 is used for controlling exhaust air temperature in smaller ventilating and air conditioning installations (by heating and cooling). Application examples: • Individual installations, (restaurants, conference rooms, storage rooms, etc.
PAGE 2
Technical Instructions Document Number CM1N3405E-P25 Rev. 1, February, 2000 Function Polygyr-Compact Exhaust Air Temperature Controller The RCM61.21 provides P control. The P band can be adjusted. The controller compares the actual value with the set point and generates a proportional control signal when a deviation occurs. The control signal is continuous and has a range of 0 - 10 Vdc. When the control signal changes from 0 – 10 Vdc, the correcting variable changes from 0 - 100%, i.e.
PAGE 3
Polygyr-Compact Exhaust Air Temperature Controller Technical Instructions Document Number CM1N3405E-P25 Rev. 1, February, 2000 Design Features, Continued 1 2 3 4 5 6 7 Connecting terminals Slider for setting the desired value Setting scale Selector switch for mode of operation Setting potentiometer for Pband Mounting flange Flexible sensing element Figure 2. The scale and slider for setting the desired temperature can be seen through a window in the cover.
PAGE 4
Technical Instructions Document Number CM1N3405E-P25 Rev. 1, February, 2000 Application Polygyr-Compact Exhaust Air Temperature Controller When the unit is switched off or the power supply interrupted (Terminal G), the regulating unit is automatically run to the closed or no-load position. A transformer is required to generate the operating voltage of 24 Vac. When several units are connected, the size of the transformer is determined by adding up the power consumption of the individual units.
PAGE 5
Polygyr-Compact Exhaust Air Temperature Controller Wiring Diagrams Technical Instructions Document Number CM1N3405E-P25 Rev. 1, February, 2000 The following wiring diagrams only show the fundamental layout. They do not contain the switch off functions and other switching functions which can vary from one installation to another according to the operating conditions. SP R M R1 Z1 SASC0011R1 24V~ R M Y1 Z3 G Z9 G0 Y2 N1 G Y R M U G0 G Y R M U G0 Y1 SN Y2 Figure 3.
PAGE 6
Technical Instructions Document Number CM1N3405E-P25 Rev. 1, February, 2000 Dimensions Polygyr-Compact Exhaust Air Temperature Controller 2.76 0.24 4.33 min. 2.76 min. 1.57 max. 3.94 max. 0.39 4.02 0.79 0.75 0.08 1.97 4.02 3.15 16.73 SASC0008R1 0.24 2.36 ~0.91 2.13 Pg.11 1.02 1.02 Figure 6. Dimensions in Inches. Information in this publication is based on current specifications.