Siemens RLA162.5U Bedienungsanleitung

Installation Instructions

Document No. 129-450

October 5, 2009

RLA162.5U Room Temperature

Controller

Item Number 129-450, Rev. AA Page 1 of 4

Product Description

Room temperature controller for basic ventilation, air

conditioning and heating systems. Compact design

with two analog, 0 to 10 Vdc control outputs for

heating and/or cooling.

Product Numbers

RLA162.5U Automatic Heat/Cool Changeover

Warning/Caution Notations

WARNING:

Personal injury/loss of life may

occur if you do not follow the

procedures as specified.

CAUTION:

Equipment damage, or loss of

data may occur if you do not

follow the procedures as

specified.

Required Tools

•Small, flat-blade screwdriver

•Wire strippers

•6-inch level

Mounting Accessories

•ARG70 wall plate

•141-570 lockable thermostat guard

•QAP22 Changeover sensor

Expected Installation Time

35 minutes

Prerequisites

•Provide 24 Vac power source to thermostat wall

mounting location.

•Run wires from damper/valve actuator to

thermostat wall mounting location.

Installation

Figure 1. Acceptable Mounting Height in Inches.

Figure 2. Airflow Requirements in Inches.

Document No. 129-450

Installation Instructions

October 5, 2009

Page 2 of 4Siemens Industry, Inc.

1 2 3

4 5 6

Document No. 129-450

Installation Instructions

October 5, 2009

Siemens Industry, Inc. Page 3 of 4

Wiring Terminals

1 Operating voltage, 24 Vac positive

2 Operating voltage, 24 Vac negative

D1 Day/night changeover

5 Limitation input 0 to 10 Vdc

GND Ground for day/night changeover

10 Measuring Neutral

11 Heat/cool changeover sensor

13 Fan or auxiliary relay, positive

18 Control signal, 0 to 10 Vdc, Heat 1

19 Control signal, 0 to 10 Vdc, Cool or

Heat 2

20 Fan or auxiliary relay, negative

Figure 3. RLA162.5U Wiring Terminals.

Wiring Diagrams

Figure 4. RLA162.5U Room Temperature Control with

Setpoint Changeover.

Figure 5. RLA162.5U Room Temperature Control with

Minimum Limitation of the Supply Air Temperature.

B2 Heat/cool changeover sensor

E1 Fan or auxiliary unit

F2 Freeze stat

M Neutral

N1 Room temperature controller (RLA162.5U)

N2 Air duct temperature controller (RLM162U) as a

limiter

R Resistive input

S1 Time clock or switch for day/night setpoint

changeover

U 0 to 10 Vdc output feedback

Y 0 to 10 Vdc input signal

Y1 Heating valve actuator

Y2 Cooling valve actuator

Z9 Limit thermostat

Commissioning Table 1. DIP Switch Settings.

Function

Action

Operating mode

Heating and cooling in sequence

Two-stage heating

Single-stage cooling

Single-stage heating

Control mode

PI (integral action time 600 seconds)

P (XP1)

Heating output control

Action (18)

10 Vdc at setpoint conditions

0 Vdc at setpoint conditions

Cooling/Second stage

output Control Action (19)

10 Vdc at setpoint conditions

0 Vdc at setpoint conditions

The factory default setting for all five switches is OFF.

Document No. 129-450

Installation Instructions

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. Teflon is a registered trademark of DuPont. Product or company names mentioned herein may be the trademarks

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.editor.us.sbt@siemens.com

Document No. 129-450

Printed in the USA

Page 4 of 4

Commissioning, Continued

Proportional band adjustment (XP1): Potentiometer setting should correspond to the required

0°F to 90°F (0 K to 50 K) range of the controller’s output signal.

Energy saving adjustment (ECO): Potentiometer setting should correspond to the required

0°F to 18°F (0 K to 10 K) offset of normal setpoint. Energy Saving = Normal setpoint

+/- offset.

NOTE: XP1 and ECO adjustments must be made by the user; factory settings are zero or “random”.

Troubleshooting

Response

Possible Causes

Valve does not

respond •Valve not connected

•No power supply

Valve travels in the

wrong direction •Selection of operating action is

wrong. DIP Switches 4 (Y1) and

5 (Y2) should match control

action of the valve actuator.

•Wrong controller terminal used

Control responds

too slowly

•Reduce P-band (XP1)

Control is unstable

•Increase P-band (XP1)

Dimensions

Figure 6. Dimensions in Inches (Millimeters).

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