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Polygyr

-Compact

Technical Instructions

Document No. CM1N3409E-P25

Rev. 1, February, 2000

Immersion Temperature

Controller

Siemens Building Technologies, Inc.

Features

•

Two outputs for heating

•

Continuous control signal

•

PI control

•

Electronic

•

24 Vac

Application

•

The RCE61.21 is used in installations for domestic water heating where two

actuators must be controlled in sequence.

The temperature controlled by the RCE61.21 can be shifted by:

•

the outdoor temperature, e.g., for weather dependent control

•

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

N1Y1

SASC0029R1

N1 RCE61.21 Immersion Temperature Controller

Y1 Valve with Actuator

Y2 Valve with Actuator

Figure 1. Application Example.

Product Number

RCE61.21

Ordering

When ordering, specify quantity, product number and description.

Summary of content (5 pages)

PAGE 1
Technical Instructions Document No. CM1N3409E-P25 Rev. 1, February, 2000 Polygyr®-Compact Immersion Temperature Controller Features Application • Two outputs for heating • Continuous control signal • PI control • Electronic • 24 Vac • The RCE61.21 is used in installations for domestic water heating where two actuators must be controlled in sequence. The temperature controlled by the RCE61.21 can be shifted by: • the outdoor temperature, e.g.
PAGE 2
Technical Instructions Document Number CM1N3409E-P25 Rev. 1, February, 2000 Function Polygyr-Compact Immersion Temperature Controller The RCE61.21 provides PI control. Its proportional band is adjustable and three different integral action times can be selected. The controller compares the actual value with the set point and generates two control signals when a deviation occurs. The control signals are switched in sequence. They are continuous and have a range of 0 - 10 Vdc.
PAGE 3
Polygyr-Compact Immersion Temperature Controller Accessories If required, a protection well can be ordered: 4 660 1893 0 4 660 1799 0 Unit Combinations Technical Instructions Document Number CM1N3409E-P25 Rev. 1, February, 2000 Protection well PN10, nickel plated brass Protection well PN16, St 18/8/2,5 CrNiMo The RCE61.21 can control various units with the following characteristics: • Type of control 0 — 10 Vdc • Operating voltage 24 Vac Remote Setting Units The FZA21.
PAGE 4
Technical Instructions Document Number CM1N3409E-P25 Rev. 1, February, 2000 Compensation Polygyr-Compact Immersion Temperature Controller If a compensation input is used, attention must be paid to its 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.
PAGE 5
Polygyr-Compact Immersion Temperature Controller Wiring Diagrams Technical Instructions Document Number CM1N3409E-P25 Rev. 1, February, 2000 The following wiring diagram only shows the fundamental layout. It does 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 SASC0018R1 24V~ R M N1 R1 Y1 Y2 Y1 Z3 G G0 Y2 N1 G Y R M U G0 G Y R M U G0 Y1 SN Y2 RCE61.