Siemens Polygyr-Compact Betriebsanleitung

Polygyr®-Compact

Technical Instructions

Document No. CM1N3407E-P25

Rev. 1, February, 2000

Discharge Air Temperature

Controller

Siemens Building Technologies, Inc.

Features •Two outputs for heating and cooling

•Continuous control signal

•PI control

•Electronic

•24 Vac

Application The RCM61.22 is used for controlling discharge air temperature in smaller ventilating

and air conditioning installations (by heating and cooling).

Application examples:

•Individual installations, (kitchens, cloak rooms, storage rooms, etc.)

•Zone control in larger installations

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 RCM61.22 can be shifted:

•by the outdoor temperature to obtain summer/winter compensation.

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

Product Number RCM61.22

Ordering When ordering, specify quantity, product number and description.

Technical Instructions Polygyr-Compact Discharge Air Temperature Controller

Document Number CM1N3407E-P25

Rev. 1, February, 2000

Page 2 Siemens Building Technologies, Inc.

Function The RCM61.22 provides PI control. The proportional 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., there is a proportional relationship between the correcting

variable and the control signal. The adjusted Xp (proportional band) refers to heating

(Y1). The P band for cooling (Y2)is half as wide, making it possible to obtain the same

control quality for both heating and cooling, although the control conditions are different

(nearly the same plant gain with different correcting spans).

Each control output generates a control signal of 0 – 10 Vdc. The outputs are switched

in sequence and their mode of operation is opposed making it possible to provide

sequence control of two actuators with different modes of operation.

YLoad

Signal voltage

Heating

Cooling

10V

SASC0016R1

Figure 1.

Compensation The reference value is fed to the controller, which shifts the set point. There are two

possibilities:

•Universal compensation over the whole setting range or over any part of the setting

range with the help of the RZF61.100 universal shift controller, or from a building

automation system.

•Set point adjustment within ± 10% of the setting range; this is generally made from

a building automation system.

For more information on compensation, see

Application

Design Features The RCM61.22 is a small, electronic controller that combines electronics, setting scale

and sensing element into one unit.

The casing is plastic with a removable cover, fully active flexible sensing element, and

removable mounting flange with adjustable positions.

All setting devices and connecting terminals are contained in the housing and

accessible only when the cover is removed.

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.

Technical Instructions Polygyr-Compact Discharge Air Temperature Controller

Document Number CM1N3407E-P25

Rev. 1, February, 2000

Page 4 Siemens Building Technologies, Inc.

Application 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. See

Wiring Diagrams

for connecting terminal

designations.

Every output of the RCM61.22 can control up to 10 units (actuators, converters, etc.) in

parallel operation. If a compensation input is used, attention must be paid to the input

signal.

Terminal Z1: Input for universal compensation. The signal + 5V ± 10V

corresponds to ± 100% of the theoretical setting range.

Terminal Z3: Input for set point adjustment (fixed value shift). The signal + 5V ±

5V corresponds to ± 10% of the theoretical setting range.

Mounting Mounting location:

•After the supply air fan, if the latte is mounted after the last air handling unit.

•Otherwise, after the air handling unit, with a clearance of at least 1.64 feet.

The flexible sensing element should be positioned diagonally in the duct, but must not

come in contact with the duct wall.

Installation Instructions are supplied with the unit.

Commissioning The wiring must be checked when commissioning the installation. To facilitate

commissioning, the controller can be operated as a P controller by using a service plug.

The correct operation of the regulating unit can be checked by setting the slider to its

limit positions. The factory-set P band Xp normally gives good control results. If

readjustment is required, the following must be noted:

•In case of instability: Xp must be increased.

•In case of excess stability: Xp must be decreased.

If auxiliary control functions (e.g., limitation, compensation) are fed to the controller, the

controlled value must first be adjusted, with no influence from the auxiliary control

functions. To do this, the terminals for auxiliary units must be disconnected. The

auxiliary values are adjusted only after the controlled value is adjusted.

If a remote setting unit is used, the slider for setting the desired temperature must be set

to “ext”.

Polygyr-Compact Discharge Air Temperature Controller Technical Instructions

Document Number CM1N3407E-P25

Rev. 1, February, 2000

Information in this publication is based on current specifications. The company reserves the right to make changes in specifications and models as

Siemens Building Technologies, Inc.

Landis & Staefa Division

1000 Deerfield Parkway

Buffalo Grove, IL 60089-4513

U.S.A.

Document No. CM1N3407E-P25

Printed in the U.S.A.

Page 5

Wiring Diagrams 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.

24V~

RM Z1 Z3 G

GYRM U

G0 Y2

GYRM U

SASC0018R1

RR1

N1 RCM61.22 Discharge Air Temperature Controller

R1 FZA21.11 Remote Setting Unit

Y1 Actuator for ⊕(heating)

Y2 Actuator for



(cooling)

Figure 3. Exhaust Air Temperature Control with Low Limiting of Discharge Air

Temperature.

Terminal Layout

Y1G0 Y2

Z3Z1MRG

SASC0017R1

Figure 4. Terminal Layout.

G, G0 Operating voltage 24 Vac

G System potential (SP)

G0 System neutral (SN)

M Measuring neutral

R Set point signal

Y1 Control signal 0 – 10 Vdc for ⊕heating

Y2 Control signal 0 – 10 Vdc for



cooling

Z1 Reference signal + 5V ± 10V

Z3 Reference signal + 5V ± 5V

Dimensions

SASC0008R1

0.24

2.13 1.02

3.15

2.36 0.24

1.02

Pg.11

4.02

1.97

4.02

2.76 4.33

min. 1.57

max. 3.94

min. 2.76

max. 0.39

~0.91

0.75

16.73

0.08

0.79

Figure 5. Dimensions in Inches.

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