Installation Instructions

ManualsBrandsSiemens Manuals3rd party integrationDesigo RXC21 Room Controller Application Notes Manual Supplement

Document No. 550-696

Rev. 1, May, 2002

LTEC Heat Pump

DDC Controller

Page 1 of 9

Product Description

These instructions explain how to install or replace a

LTEC (LonMark



Terminal Equipment Controller) HP

(Heat Pump) DDC Controller (Figure 1). There are two

platforms available, reduced point and full point

(Figure 3); each platform handles various application

sets. Each application set has a default input/output-

wiring configuration, shown in the wiring diagrams.

See Figure 5 through Figure 8.

The Heat Pump Controller applications are provided in

the following configurations:

• Single stage compressor with or without

reversing relay, outside air damper, and auxiliary

or perimeter heat control.

• Multistage compressor with or without reversing

relay, outside air damper, and auxiliary or

perimeter heat control.

LON0006R1

Figure 1. LTEC Controller – open cover.

Product Numbers

Part Number Application Input/Output

550-538 LTEC Heat Pump

4 IN, 6 DO

550-539 LTEC Heat Pump 5 IN, 8 DO, 2 AO

In addition to the listed inputs above, each platform can

accept a series 550-180 through 550-187 LTEC room

temperature sensor (RTS) with optional digital display,

occupancy override push button and set point

adjustment.

Warning/Caution Notations

WARNING

Personal injury/loss of life may

occur if a procedure is not

performed as specified.

CAUTION

Equipment damage, or loss of

data may occur if the user

does not follow procedure as

specified.

LON0034R1

8 7/8"

(2.25mm)

8 1/16"

(205mm)

1 7/8"

(48mm)

(127mm)

6 3/16"

(157mm)

A01

A02

D01

D02

D03

D04

D05

D06

D07

D08

NMT

RTS

SRV

BST

SRV

BST

NET

DI1

AI1/

DI2

AI2/

DI2

AI2/

DI3

AI3/

DI4

AI4/

DI5

AI5/

24Vac H

Neutral

EGrnd

Figure 2. LTEC Controller.

Summary of content (9 pages)

PAGE 1
Installation Instructions Document No. 550-696 Rev. 1, May, 2002 LTEC Heat Pump DDC Controller Product Description These instructions explain how to install or replace a LTEC (LonMark Terminal Equipment Controller) HP (Heat Pump) DDC Controller (Figure 1). There are two platforms available, reduced point and full point (Figure 3); each platform handles various application sets. Each application set has a default input/outputwiring configuration, shown in the wiring diagrams. See Figure 5 through Figure 8.
PAGE 2
Document No. 550-696 Installation Instructions Rev. 1, May, 2002 Required Tools • Pencil • ESD wrist strap • Small flat blade screwdriver • Medium flat blade screwdriver • Wire stripper • Medium duty electric drill Network Management Tool Connection NMT • ¼ in (6mm) hex nut bit Room Temperature Sensor Connection RTS • Network Management Tool Service Pin • Bus interface and cables 3.
PAGE 3
Document No. 550-696 Installation Instructions Rev. 1, May, 2002 7. For input type selection, (digital, voltage, or current) see the jumper and connection information in Table 2. NOTE: Each DO provides a normally open (NO) and 24 Vac hot (H) terminal. Terminate both connections of a 24 Vac load directly to the controller board. Floating control actuators require 2 DOs and use 3 wire connections. The 24 Vac Common is switched through the Triac when the associated DO is energized.
PAGE 4
Document No. 550-696 Installation Instructions Rev. 1, May, 2002 Terminal Designations AI/DI 1 Figure 4 shows the LTEC wiring designations and internal jumper locations for both controllers. AI/DI 2 AI/DI 3 NOTE: All inputs and outputs physical connections are pre-configured per application number selected. AI/DI 4 AI/DI 5 1+ 2 3+ 4 5 5V 6+ 7 - J6 J12 J4 J13 LON0018R2 The wiring diagrams (Figure 5 through Figure 8) are shown using the full point controllers (shaded terminals).
PAGE 5
Document No. 550-696 Installation Instructions Rev. 1, May, 2002 Table 2. Input Configuration and Jumper Settings.
PAGE 6
Document No. 550-696 Installation Instructions Rev. 1, May, 2002 1. To record Initial Values, before disconnecting the old controller, do one of the following: • If the controller is communicating with the field panel, update the controller initial values at the field panel. • • 2. If the controller does not communicate with the field panel, but does communicate with the NMT, record the appropriate configuration points on Table 3 at the end of these instructions.
PAGE 7
Document No. 550-696 Installation Instructions Rev. 1, May, 2002 LTEC HP Application Wiring Diagrams Room Sensor NMT RTS SRV BST 1 2 Network Trunk *Mixed Temp Sensor Spare Temp Sensor Fan Status DI *Low Temp Sensor DI Jumper OCC Sensor DI NET + + + A03 A01 SRV BST J7 J2 A02 1 2 3 4 5 6 1 2 3 24Vac H 4 D03 5 24Vac H 6 D04 7 24Vac H 8 D05 9 24Vac H 10 D06 11 24Vac H 12 D07 13 24Vac H 14 D08 15 24Vac H 16 OA Damper Act. 0-10 Vdc Perimeter Htg.
PAGE 8
Document No. 550-696 Installation Instructions Rev. 1, May, 2002 Room Sensor NMT RTS SRV BST SRV BST 1 2 Network Trunk *Mixed Temp Sensor Spare Temp Sensor Fan Status DI *Low Temp Sensor DI Jumper OCC Sensor DI + + A02 + A03 A01 J7 J2 NET 1 2 3 4 5 6 OA Damper Act. 0-10 Vdc Perimeter Htg.
PAGE 9
Document No. 550-696 Installation Instructions Rev. 1, May, 2002 Table 3. Record of Controller Modified Initial Values. Point Number Descriptor Initial Value Point Number Descriptor Initial Value 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. © 2001 Siemens Building Technologies, Inc.