Siemens RWD44U User manual

RWD44U Controller

Installation and

Commissioning Guide

Document No. 129-408

October 5, 2009

Item Number 129-408, Rev. BA

Function RWD44U controllers are intended for HVAC and Refrigeration systems including Heat

Pumps. They are suitable for 1-, 2-, and 3-stage compressors.

Input X1 detects the room or space temperature and compares it with the setpoints.

Depending on the deviation, the controller acts accordingly with its outputs to achieve

the desired setpoints.

Function Summary •Controller – Stand-alone controller with four two-position (On/Off) outputs.

•Universal input (X1) for the main temperature sensor.

•Universal input (X2) for the following auxiliary functions:

On/Off (Standby) Setpoint reset

Remote setting unit Sensor averaging

Alarm Winter/Summer setpoint changeover

Filter alarm Sensor select

•Digital input (D1) for the following digital functions:

−Day/night changeover setpoint

−On/Off (Standby)

−Alarm

−Filter alarm

•The RWD44U controller is intended for either DIN rail mounting in a switchboard or

screw mounting with a protective enclosure.

•Desired output configuration and auxiliary function must be entered for initial set-

up. See Initial Program Settings (New Controller).

Application The RWD44U has standard pre-configured applications. There are three main

configuration loops with combinations of ten auxiliary functions. See Table 1.

Document Number 129-408 RWD44U Controller Installation and Commissioning Guide

October 5, 2009

Page 2 of 10 Siemens Industry, Inc.

Table 1. Application Numbers.

H = Heating

C = Cooling

Cr = Compressor

RV = Reversing valve

Eco = Economy

Main Loop

Auxiliary Loop

#1 × (2H & 2C)

#2 × (3 stage Cr + RV cool)

# 3 × (3 stage Cr + RV heat)

#x0 (Standby)

#10

#20

#30

#x1 (Remote

setpoint)

#11

#21

#31

#x2 (Alarm)

#12

#22

#32

#x3 (Filter alarm)

#13

#23

#33

#x4 (Setpoint reset)

#14

#24

#34

#x5 (Avg. X1, X2)

#15

#25

#35

#x6 (Win/Sum Digital)

#16

#26

#36

#x7 (Win/Sum

Analog)

#17

#27

#37

#x8 (Sensor select)

#18

#28

#38

#x9 (Active input)

#19

#29

#39

NOTE: Three-stage compressor applications are also used for one- and two-stage applications. Compressor

stages are selected during commissioning.

Example: Two-stage compressor with reversing valve on heating, and two averaging sensors: #35

Table 2. Input Configurations – X1, X2, and D1.

Applications 10 Through 39

D1 Options

Filter Alarm

Alarm

Day/Night

Standby

#x0 (Standby) Main Standby ♦

♦

–

#x1 (Remote setpoint)

Main

Remote setpoint

♦

#x2 (Alarm)

Main

Alarm

♦

–

♦

#x3 (Filter alarm)

Main

Filter alarm

–

♦

#x4(Setpoint reset) Main Setpoint reset ♦

♦

#x5 (Avg. X1, X2)

Main

♦

#x6 (Win/Sum Digital)

Main

Win/Sum

♦

#x7 (Win/Sum Analog)

Main

Win/Sum

♦

#x8 (Sensor select) Main Main ♦

♦

#x9 (Active input)

Main

Standby

♦

–

Table 3. Output Configurations – Q1, Q2, Q3, and Q4.

Application

Numbers

10 through 19

Heating Stage 2 (H2)

Heating Stage 1 (H1)

Cooling Stage 1 (C1)

Cooling Stage 2 (C2)

20 through 29

Reversing Valve (RV) Compressor Stage 1 (Cr1) Compressor Stage 2 (Cr2) Compressor Stage 3 (Cr3)

30 through 39

NOTE: Application sheets for the listed applications are available online.

RWD44U Controller Installation and Commissioning Guide Document Number 129-408

October 5, 2009

Siemens Industry, Inc. Page 3 of 10

Display Explanation

Symbol

Description

Setting Range

Symbol

Description

Setting Range

Main Screen

Adjustable setting screen

TOOL

PC communication port

being used

Application No

10 through 39

OUT RANGE

The setting is out of range



Day time operation

Err

Sensor error



Night time operation

Sec

Seconds

Universal (Main) Input X1

Ni 1000

Ω

: -58°F to 302°F

(-50°C to 150°C)

(unchangeable)

Pt 1000 Ω: -4°F to 356°F

(-20°C to 180°C)

(unchangeable)

0 to 10 Vdc: -100 to 2400

Universal (Auxiliary) Input

Ni 1000

Ω

: -58°F to

302°F (-50°C to 150°C)

(unchangeable)

Pt 1000 Ω: -4°F to 356°F

(-20°C to 180°C)

(unchangeable)

0 Vdc to 10 Vdc: -100 to

2400

Variable resistor: The

resistance range should

be within 0

Ω

to 1000

Ω

°C

Celsius scale

Cooling

°F

Fahrenheit scale

Heating

Kelvin

SP-h

Setpoint on the heating side

for temperature control

Digital outputs

SP-c

Setpoint on the cooling side

for temperature control

R/V

Reversing valve status = On

Output status = Off

Standby mode

Output status = On

"OFF"

Controller = Off

"ON"

Controller = on standby

PS 4 – Differentials and Delays

Switching Differential

0.1 K to 50 K

Time Delay from heat

⇔

cool

0 to 4,096 sec

Minimum switch on time

for Q

0 to 4,096 sec

Time Delay for next

stage ON

0 to 4,096 sec

Minimum switch off time

for Q

0 to 4,096 sec

PS 3 - Auxiliary Control Loop Set-up

Setpoint reset shift

(Start point, End point and

Shift differential)

Setpoint reset shift

(Start point, End point and

Shift differential)

SUM

Summer changeover point

Time delay from Winter ⇔

Summer changeover point

WIN

Winter changeover point

Digital input function

PS 2 - Unit, X1 and X2 Sensor Type and Sensing Range Definition

Unit

Define unit

°C or °F

ΔX1

Calibration offset for X1

(Ni and Pt sensor only)

-5 K to 5 K or

-9°F to 9°F

X1NI 1000

X1 is Ni 1000

Ω

temperature

sensor

Ni 1000

Ω

: -58°F to 302°F

(-50°C to 150°C) (unchangeable)

ΔX2

Calibration offset for X2

(Ni & Pt sensor only)

-5 K to 5 K or

-9°F to 9°F

X2NI 1000

X2 is Ni 1000

Ω

temperature

sensor

Ni 1000

Ω

: -58°F to 302°F

(-50°C to 150°C) (unchangeable)

X1L

Start point of the X1

(for 0 Vdc to 10 Vdc only)

-100 to 2400

X1Pt 1000

X1 is Pt 1000 Ωtemperature

sensor Pt 1000 Ω: -4°F to 356°F

(-20°C to 180°C) (unchangeable)

X2L

Start point of the X2

(for 0 Vdc to 10 Vdc only)

-100 to 2400

X2Pt 1000

X2 is Pt 1000 Ωtemperature

sensor

Pt 1000 Ω: -4°F to 356°F

(-20°C to 180°C) (unchangeable)

X1H

Stop point of the X1

(for 0 Vdc to 10 Vdc only)

-100 to 2400

X2SP

Remote setpoint

0 Vdc to 10 Vdc or 0 to 1000

Ω

X2H

Stop point of the X2

(for 0 Vdc to 10 Vdc only)

-100 to 2400

X2Vr

Variable Resistor

Ω

to 1000

Ω

Document Number 129-408 RWD44U Controller Installation and Commissioning Guide

October 5, 2009

Page 4 of 10 Siemens Industry, Inc.

Display Explanation, Continued

PS 1 – Application Number Selection:

Standby mode

AVERAGE

Averaging sensor X1 and

REM

Remote setting

WIN/SUM

AnG

Winter/Summer

changeover by analog

input

ALARM

Alarm indication

WIN/SUM

diG

Winter/Summer

changeover by digital

input

FILTER

Filter alarm indication

⇔

Selecting X2 or X1 as the

main sensor

COMP

Setpoint reset function

Act

Active sensor input

Commissioning

Guide Commissioning is implemented via push buttons on the controller. The push buttons

have the following functions:

Press

Button to enter the PS page OR edit and save the value when the page

appears with the logo

Press

Button for viewing the next page OR to increase the value.

Press

Button for viewing the previous page OR to decrease the value.

Changing a parameter

1. Press the SEL λbutton.

2. Press the + σor –τbutton to increase or decrease the flashing parameter.

3. Press the SEL λbutton to save the value (During PS mode, the values are saved only after exiting the PS mode).

NOTE: A 9-pin port is provided for optional commissioning via Siemens software tool. See Software Tool

(Optional Programming).

Initial Program

Settings

(New Controller)

There are five levels of parameter setting (PS) modes: PS1 through PS4, and a

setpoint mode. Each PS has a set of default parameters, which can be changed during

commissioning.

When powered the first time, the controller will proceed to PS1 with default

application 10. See below for commissioning steps.

PS 1 – Application Settings

Range/Type

Default

Enter application number

10 through 39

Select number of compressor stages

1-, 2- or 3-stage

2-stage

Select reversing valve output – On or Off during no demand

On or Off

Off

After completing PS1, the user has the option to progress to setpoint mode (only for new RWD) by waiting for

two seconds and default parameters will be accepted. If parameters PS2 through PS4 need to be adjusted,

press the +▲button immediately to the next PS (see Commissioning Flowchart).

PS 2 – Input X1, and X

Range/Type

Default

Select unit

°F or °C

°F

Select main sensor X1

Ni 1000, Pt 1000, 0 to 10V

Ni 1000

Enter X1 sensor calibration offset (Ni or Pt only)

9°F (5°C)

0°F

Enter X1 active sensor range (0 to 10 Vdc only)

-100 to 2400

32°F to 122°F

(0°C to 50°C)

Select auxiliary sensor X2

Ni 1000, Pt 1000, 0 to 10 Vdc

Ni 1000

Enter X2 sensor calibration offset (Ni or Pt only)

9°F (+5°C)

0°F (0 K)

Enter X2 active sensor range (0 to 10 Vdc only) -100 to 2400 32°F to 122°F

(0°C to 50°C)

SEL

RWD44U Controller Installation and Commissioning Guide Document Number 129-408

October 5, 2009

Siemens Industry, Inc. Page 5 of 10

PS 3 – Digital and Auxiliary Functions

Range/Type

Default

Select digital input D1

D/N, Filter Alarm, Alarm, on/off

Depends on #x

Aux. Function = Setpoint reset

Setpoint reset start point, reverse acting

Setpoint reset sensor range

72°F (22°C)

Setpoint reset end point, reverse acting

Setpoint reset sensor range

65°F (18°C)

Setpoint reset shift

Setpoint reset sensor range

8°F (4 K)

Setpoint reset n start point, direct acting

Setpoint reset sensor range

83°F (28°C)

Setpoint reset end point, direct acting

Setpoint reset sensor range

90°F (32°C)

Setpoint reset shift

Setpoint reset sensor range

8°F (4 K)

Aux. function = WIN SUM analog

Enter changeover setpoint for winter

Sensor range

72°F (22°C)

Enter changeover setpoint summer

Sensor range

83°F (28°C)

Enter changeover time delay, winter

⇔

summer

00.01 to 23 hours 59 minutes

00.01 minute

PS 4 – Differentials and Time Delays

Range/Type

Default

Enter switching differential (SD) for output stage 1, 2, and 3

Sensor range

2°F (1 K)

Enter min On time for output stage 1, 2, and 3

0 to 4,096 s

0 s

Enter min Off time for output stage 1, 2, and 3

0 to 4,096 s

60 s

Enter time delay TD for next stage On

0 to 4,096 s

30 s

Enter changeover time delay TD, heating

⇔

cooling demand

0 to 4,096 s

120 s

Setpoint Mode

Range/Type

Default

Enter SP-h1

Sensor range

70°F (21°C)

Enter SP-h2

Sensor range

68°F (20°C)

Enter SP-h3

Sensor range

66°F (19°C)

Enter SP-c1

Sensor range

74°F (23°C)

Enter SP-c2

Sensor range

76°F (24°C)

Enter SP-c3

Sensor range

77°F (25°C)

If D1 is set for Day/Night

Enter night SP-h1

Sensor range

64°F (18°C)

Enter night SP-h2

Sensor range

62°F (17°C)

Enter night SP-h3

Sensor range

60°F (16°C)

Enter night SP-c1

Sensor range

79°F (26°C)

Enter night SP-c2

Sensor range

80°F (27°C)

Enter night SP-c3

Sensor range

82°F (28°C)

For remote setpoint – Heating stage 1 is the remote setpoint and the

reference point. A ∆SP is set between the stages.

H2 C1

Remote

Setpoint

Enter

∆

SP H2

Sensor range

-2°F (-1 K)

Enter

∆

SP H3

Sensor range

-4°F (-2 K)

Enter ∆SP C1

Sensor range

4°F (2 K)

Enter

∆

SP C2

Sensor range

6°F (3 K)

Enter

∆

SP C3

Sensor range

8°F (4 K)

After completing the setpoints, press + button for the main display.

Document Number 129-408 RWD44U Controller Installation and Commissioning Guide

October 5, 2009

Page 6 of 10 Siemens Industry, Inc.

Main Display

(Normal Operation) The controller is active during main display.

The main display shows:

1. Whether Q... is On or Off (= Off, ν= On).

2. X1 temperature in °F or °C.

3. Day/night settings (= day, = night).

4. Reversing valve status (= Off, R/V = On).

Figure 1. Main Display.

Other displays are available by pressing the +▲button. The various displays are listed below.

1. Setpoints

2. Digital input active or inactive

3. X2 sensor reading

4. Q… output status

5. Application #xx

Figure 2. Setpoint Display.

Changing Setpoint in

Main display On entering any of the setpoint displays, the setpoint on display can be adjusted by

pushing the SEL λbutton. Increase value by pressing the + ▲button, or decrease the

value by pressing the

−

▼button. When the required value is reached, press the SEL λ

button to save the new value.

Time out

For setpoint adjustment during normal operation the controller will exit the setting after 20

seconds, and return to the main screen. However, for setpoint adjustment in PS mode, there is

no time limit. The controller remains in the PS mode until the user completes the entire process.

NOTE: Changing the heating setpoints to a lower value, set SP-h3 before setting SP-h2 and

SP-h1.

Changing the cooling setpoints to a higher value, set SP-c3 before setting SP-c2 and

SP-c1.

The controller will display an ‘out range’ message if SP-h3 > SP-h2>SP-h1 and

SP-c1>SP-c2>SP-c3.

RWD44U Controller Installation and Commissioning Guide Document Number 129-408

October 5, 2009

Siemens Industry, Inc. Page 7 of 10

Main Display to PS Mode Press both buttons, and hold for five seconds to enter the PS mode. PS4 will appear

first.

Press the button to scroll down to the right PS for editing parameters.

NOTE: When changing from the main display to PS mode, the controller remains

active unless a parameter has been changed. Ensure all outputs are

disconnected before changing an application.

Software Tool

(Optional

Commissioning)

A software tool for the controller application selection and parameter adjustment is

available. It is a user-friendly Windows® 95 (or later) based software tool. The software

tool has the following functions:

Adjusting all available parameters.

Uploading and downloading the program.

Saving parameter settings.

Viewing or providing a printout of the settings.

Parameters can be hidden from displaying.

Commissioning

Flowchart

Figure 3. Commissioning Flowchart.

Document Number 129-408 RWD44U Controller Installation and Commissioning Guide

October 5, 2009

Page 8 of 10 Siemens Industry, Inc.

Wiring Terminals

NOTE: Screwed terminals for cables with min

2 × 16 or 1 × 14 AWG.

Figure 4. Wiring Terminals.

G, G0 SELV 24 Vac power supply

D1 Digital input

M Ground (G0) for signal inputs

and universal inputs

Q1 to Q4 Relay outputs: Max. rating 24

to 240 Vac

Vac/5A res/5 FLA/30 LRA/

1/2 HP

X1 Signal input (main input:

Siemens Ni 1000, Pt 1000 and

0 to 10 Vdc)

X2 Signal input (aux input Siemens

Ni 1000, Pt 1000, 0 to 10 Vdc,

and remote setting unit)

Tool Communication port for PC

(9-pin plug)

Wiring Diagrams

Figure 5. Applications 10 Through 19.

Cooling stage 1

Cooling stage 2

Heating stage 1

Heating stage 2

Room temperature sensor

Auxiliary sensor or a digital input

Switch or time clock

Personal computer (optional, for

set-up only)

Figure 6. Applications 20 Through 39.

CR1

CR2

CR3

Compressor stage 1

Compressor stage 2

Compressor stage 3

Reversing valve relay

Main temperature sensor

Auxiliary sensor or a digital input

Switch or time clock

Personal computer (optional, for

set-up only)

NOTE: For a single

compressor, CR2 and

CF3 are not

connected. For a dual

compressor, CR3 is

not connected.

CAUTION:

The TOOL signal ground is galvanically connected to G0 inside the controller. If the signal line of the computer

is grounded to Earth, the G0 line after TOOL connection will be grounded as well. This will change the SELV

to a PELV.

RWD44U Controller Installation and Commissioning Guide Document Number 129-408

October 5, 2009

Siemens Industry, Inc. Page 9 of 10

Installation

Mounting Notes

Figure 7. Mounting Options.

The RWD44U can be mounted as follows:

Observe all local installation and mounting regulations.

A On a DIN rail (EN 50 022-35 × 7.5) at least 4.75 inches (120 mm) long for

RWD44U.

B Wall-mounted with two screws. (Minimum length of the screws should be

2.75 inches (70 mm) (φ3.2 mm)

C Front-mounted using standard elements:

•One DIN rail 5.90 inches (150 mm) long for RWD44U

•Two hexagonal placeholders 1.96 inches (50 mm)

•Washers

•Screws

NOTE: (Ensure all terminations are tightened before final mounting to front

panel.)

D Inside the ARG62.21 (single RWD44U).

WARNING:

There must be a minimum of 0.31 inches (8 mm) distance from

terminations to panel/enclosures to avoid electric shock.

Electrical Installation

Notes •Standard cables can be used for the controller. However, when mounting in an

environment greatly exposed to EMI, use only shielded cables.

•The RWD44U is designed for 24 Vac operating voltage.

•Low voltage must comply with the requirements for safety extra-low voltage

(SELV) as per EN 60730.

•Use safety insulating transformers with double insulation as per EN 60742; they

must be designed for 100% duty.

•When using several transformers in one system, the connection terminals G0

must be galvanically connected.

•Supplying voltages above 24 Vac to low voltage connections may damage or

destroy the controller or any other connected devices. Additionally, connections

to voltages exceeding 42 Vac endanger personal safety.

Document Number 129-408 RWD44U Controller Installation and Commissioning Guide

October 5, 2009

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

models as design improvements are introduced. Windows is a registered trademark of Microsoft Corporation. Other product or company

Siemens Industry, Inc.

Building Technologies Division

1000 Deerfield Parkway

Buffalo Grove, IL 60089

+ 1 847-215-1000

Your feedback is important to us. If you have

comments about this document, please send them

to SBT_technical.[email protected]om

Document No. 129-408

Printed in the USA

Page 10 of 10

Dimensions

Figure 8. RWD44U Controller Dimensions in Inches (Millimeters).

Figure 9. ARG62.21 Enclosure Dimensions in Inches (Millimeters).

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