Installation and Maintenance Manual IM 928

Group: Controls

Part Number: IM 928

Date: February 2009

Supersedes: New

MicroTech®

III Water Source Heat Pump Unit Controller BACnet® MS/TP Communication Module

NOTICE

Use this manual to physically connect the McQuay MicroTech III Communication Module to water source heat pump unit controller and connect the air handler unit controller to your network. Connections and service to the MicroTech III Water Source Heat Pump Controller must be performed only by personnel knowledgeable in the operation of the equipment being controlled. Use the appropriate McQuay Engineering Data (ED), known as the Protocol Information document, to integrate the unit into your network. The Protocol Information document contains addressing details, ® protocol information, and a list of the data points available to the network. See the Reference Documents section of this manual for Protocol Information document numbers. MicroTech III control integration literature is available from your local McQuay International sales representative and www.mcquay.com.

© 2009 McQuay International

2 IM 928

Contents Revision History................................................................................................................................................................ 3 Reference Documents........................................................................................................................................................ 3 Limited Warranty .............................................................................................................................................................. 3 Notice ................................................................................................................................................................................ 3

GENERAL INFORMATION ................................................................................................................................................ 4

Hazard Identification Messages........................................................................................................................................ 4 APPLICATION ......................................................................................................................................................................... 6 COMPONENT DATA................................................................................................................................................................ 6

Light Emitting Diodes (LEDs) .......................................................................................................................................... 6 BACnet MS/TP Network Connector (P3).......................................................................................................................... 6 BACnet Board-Mounted Switches..................................................................................................................................... 6 BACnet board mounted Plugs........................................................................................................................................... 7 Address Switch .................................................................................................................................................................. 7 8-Pin Header on Base Board ............................................................................................................................................ 7 In-Circuit Testing.............................................................................................................................................................. 7 LED Description ............................................................................................................................................................... 7

INSTALLATION.................................................................................................................................................................... 8

Required Equipment.......................................................................................................................................................... 8 Installing a new BACnet MS/TP Communication Module ................................................................................................ 8 Replacing a BACnet MS/TP Communication Module....................................................................................................... 8

INTEGRATION.................................................................................................................................................................... 11

CONNECTING UNIT TO THE NETWORK ................................................................................................................................. 11 Addressing and Establishing Communications ............................................................................................................... 11 Configuring the Unit Controller ..................................................................................................................................... 11 Configurating the BACnet Module to Default Values..................................................................................................... 12 Factory-Installed BACnet MS/TP Communication Module............................................................................................ 12 Field-Installed BACnet MS/TP Communication Module ................................................................................................ 12 Important Notes............................................................................................................................................................... 12

SERVICE INFORMATION ................................................................................................................................................ 13

TROUBLESHOOTING ............................................................................................................................................................. 13 REPLACEMENT PARTS.......................................................................................................................................................... 13

IM 928 3

Figures Figure 1. MicroTech III BACnet Communication Module------------------------------------------------------------------------------ 5 Figure 2. Building Automation System ---------------------------------------------------------------------------------------------------- 6 Figure 3. BACnet MS/TP Communication Module Mounted on the Unit Controller’s Main Control Board ------------------- 9 Figure 4. Mount BACnet MS/TP Communication Module-----------------------------------------------------------------------------10 Figure 5. BACnet MS/TP Connection Schematic Diagram----------------------------------------------------------------------------10

Revision History IM 928 February 2009 Initial release

Reference Documents Number Company Title Source

ANSI/ASHRAE 135-2001

American Society of Heating, Refrigerating and Air-Conditioning Engineers

A Data Communication Protocol for Building Automation and Control Networks

www.ashrae.org

ED 15103 McQuay International Protocol Information for MicroTech III WSHP Unit Controller, LonWorks and BACnet MS/TP

www.mcquay.com

OM 931 McQuay International MicroTech III Water Source Heat Pump Unit Controller Operation and Maintenance Manual

www.mcquay.com

ED 15115 McQuay International Protocol Implementation and Conformance Statement (PICS) for MicroTech III Water Source Heat Pump Unit controller

www.mcquay.com

Limited Warranty Consult your local McQuay Representative for warranty details. Refer to Form 933-43285Y. To find your local McQuay Representative, go to www.mcquay.com

Notice © 2009 McQuay International, Minneapolis MN. All rights reserved throughout the world. McQuay International reserves the right to change any information contained herein without prior notice. The user is responsible for determining whether this product is appropriate for his or her application. The following are trademarks or registered trademarks of their respective companies. Windows from Microsoft Corporation; BACnet from ASHRAE; from Echelon Corporation; McQuay, MicroTech III from McQuay International.

General Information

This manual contains the information you need to install the MicroTech® III BACnet® Communication Module to a McQuay MicroTech III Water Source Heat Pump (WSHP) unit controller and integrate it into the network.

Hazard Identification Messages

! DANGER

Dangers indicate a hazardous situation which will result in death or serious injury if not avoided.

! WARNING

Warnings indicate potentially hazardous situations, which can result in property damage, severe personal injury, or death if not avoided.

! CAUTION

Cautions indicate potentially hazardous situations, which can result in personal injury or equipment damage if not avoided.

! WARNING Electric shock hazard. Can cause personal injury or equipment damage. This equipment must be properly grounded. Connections and service to the MicroTech III WSHP unit controller must be performed only by personnel knowledgeable in the operation of the equipment being controlled.

! CAUTION

Static sensitive components. Can cause equipment damage. Discharge any static electrical charge by touching the bare metal inside the control panel before performing any service work. Never unplug cables, circuit board terminal blocks, or power plugs while power is applied to the panel.

NOTICE

This equipment generates, uses and can radiate radio frequency energy and, if not installed and used in accordance with this instruction manual, may cause interference to radio communications. It has been tested and found to comply with the limits for a Class A digital device, pursuant to part 15 of the FCC rules. These limits are designed to provide reasonable protection against harmful interference when the equipment is operated in a commercial environment. Operation of this equipment in a residential area is likely to cause harmful interference in which case the user will be required to correct the interference at his or her own expense. McQuay International disclaims any liability resulting from any interference or for the correction thereof.

IM 928 4

Description The BACnet Communication Module incorporates a MicroTech III WSHP Unit Controller into a BACnet Local Area Network (LAN). It supports the BACnet MS/TP (EIA 485) data link layer (physical layer). The BACnet Communication Module mounts in the MicroTech III WSHP Unit Controller panel. The BACnet Communication Module is a rectangular printed circuit card with indicators (D1, D2, D3, & D4) on the top (see Figure 1). Each MicroTech III BACnet Communication Module is a printed circuit board that plugs on the top side of the MicroTech III unit controller baseboard. Figure 1 is an outline drawing with dimensions and major components of the MicroTech III BACnet Communication Module.

Figure 1. MicroTech III BACnet Communication Module

IM 928 5

Application The BACnet Communication Module connects the MicroTech III WSHP Unit Controller to the Building Automation System (BAS) on a BACnet Local Area Network. It is the interface adapter for the exchange of BACnet objects between the network and the unit controller. Figure 2 shows the BACnet Communication Module and MicroTech III WSHP Unit Controller integrated into a BAS. Refer to the MicroTech III WSHP Unit Controller Operation and Maintenance manual for details.

Figure 2. Building Automation System

BACnet MS/TPCommunication

Module

MicroTech IIIControl Board

BACnet MS/TPNetwork

Component Data Figure 1 shows the location of the major components of the MicroTech III BACnet Communication Module.

Light Emitting Diodes (LEDs) The MicroTech III BACnet MS/TP communication module has four LEDs to indicate communication activity and status of the MicroTech III BACnet Communication Module. LED Function Description D1 Program Running Program main loop activity D2 Baseboard Message SPI Activity, LED on during baseboard message D3 BACnet transmit Flashes on when transmitting a BACnet message D4 BACnet Receive Flashes on when receiving a BACnet message

BACnet MS/TP Network Connector (P3) The P3 connector connects the MicroTech III BACnet MS/TP Communication Module to the BACnet MSTP network. Pin Designation Function 1 + Non-inverting Input 2 -- Inverting Input 3 GND Reference used where isolated device require a reference 4 Shield Shield (isolated terminal for connection of shields)

BACnet Board-Mounted Switches Switch Designation Function S1 Reset Used to reset the BACnet Communication Module S2 Default Used to reset the BACnet Communication Module to default parameters

6 IM 928

IM 928 7

BACnet board mounted Plugs Plugs Function J1 Used in Factory Testing P2 Used to Program BACnet board P3 BACnet MS/TP connection point P4 Eight pin plug connects to WSHP controller

Address Switch The Address Switch, S3, must be set to the MAC address of the BACnet MS/TP Communication Module. The valid range is 0 to 127.

8-Pin Header on Base Board P4 on the back of the BACnet MS/TP Communication Module connects with the 8-Pin Header on the MicroTech III WSHP controller.

In-Circuit Testing Jumper J2 is used only in debug or special in-circuit testing modes. The jumper is used during development or to investigate board failures attributed to the micro.

LED Description LED Function Description =========================================================== D1 Program Running Program main loop activity D2 Baseboard message SPI Activity, LED On during baseboard message transfer D3 MS/TP Transmit Toggles each time an MS/TP message is transmitted D4 MS/TP Receive Toggles each time an MS/TP message is received

Installation A BACnet MS/TP Communication Module can be factory or field-installed (see the Replacement Parts section for details). The following section describes how to install a new BACnet MS/TP Communication Module or replace an existing module. It also describes how to connect the BACnet MS/TP Communication Module it to a BACnet network.

The BACnet MS/TP Communication Module mounts on connector pins and is held in place with four plastic locking standoffs. The BACnet MS/TP network connects to the BACnet MS/TP Communication Module at the network connector plug, P3.

Required Equipment Field installation/replacement and network connection requires the following:

• A BACnet MS/TP Communication Module (included in kit) • Shielded, twisted pair pigtail wire and plug for network connection • Stand-offs

Installing a new BACnet MS/TP Communication Module

! DANGER

The terminals on the Water Source Heat Pump unit controller are high voltage. Disconnect power to avoid electrical shock potential, which will result in death or serious injury.

1. Remove power from the MicroTech III unit controller and WSHP. 2. Remove the network cable plug-in connector terminal block in P3 (see Figure 2.) 3. Locate the four standoffs for the BACnet MS/TP Communication Module. 4. Install the four standoffs on the baseboard (see figure 3). 5. Orient the BACnet MS/TP Communication Module printed circuit board so that the side with the components faces out

and connector socket can mate with the 8-Pin Header on the base board. 6. Push the BACnet MS/TP Communication Module onto the connector pins and standoffs until you hear the faint click of

the locking standoffs securing the board in place.

Replacing a BACnet MS/TP Communication Module

! DANGER

The terminals on the Water Source Heat Pump unit controller are high voltage. Disconnect power to avoid electrical shock potential, which will result in death or serious injury.

1. Remove power from the unit controller. 2. Record the MAC Address set in Address Switch S3. 3. Remove the network cable plug-in connector terminal block P3 (see Figure 2.) 4. Locate the four standoffs for the BACnet MS/TP Communication Module in the unit controller’s main control board

(see Figure 3.) 5. Depress the barb on one standoff and gently pull the corner of the BACnet MS/TP Communication Module over the

barb. Do not bend the BACnet MS/TP Communication Module or misalign the connector pins. 6. Proceed to the other three corners, remove the BACnet MS/TP Communication Module from each standoff, and pull

the module over the standoffs.

8 IM 928

7. Gently lift the BACnet MS/TP Communication Module from the unit controller. 8. Locate the empty connector pins and four standoffs for the BACnet MS/TP Communication Module in the unit

controller (see Figure 3.) 9. Orient the BACnet MS/TP Communication Module so that the component side faces out and the connector pins can

mate with the 8-Pin Header on the BACnet MS/TP Communication Module (see Figure 3.) 10. Push the BACnet MS/TP Communication Module onto the connector pins and standoffs until you hear the faint click of

the locking standoffs securing the module in place.

Figure 3. BACnet MS/TP Communication Module Mounted on the Unit Controller’s Main Control Board

Switched L1

CompressorRelay

Omron G8P

No Connection

H2

H3

DANGER - HIGH VOLTAGEL1 NEUTRAL

SL1N

HP1

-1H

P1-

2

H4

BLUE Header

JP8

JP7

JP6

JP5

JP4

JP3

JP2

MTIIIUC-WSHPBase ControllerPart # 668105601

1

L1-1 L1-2 L1-3 N1 N2 N3

TB1

14

32

5O

GA

RC

TB2

TB3 U

E

RUNPRG

Pin 1

JTAG PORT

Config Jumpers

W2

W1

Y2Y

1H

91

H7

1

H1

24 C

H6

1

JP1

TestJmpr

H8

1

H5

1

YELLOW Header

BLUEHeader

Test

-1

RW

2W

1Y

2Y1

G

P2

8 7 6 5 4 3 2 1

ON

J1

S3

J2

U3

U1

D4 D3 D2 D1

U6

U4

U5S1

T1

S2

U2

Shield

P3

Signal -

Signal +

Standoff

Standoff

IM 928 9

Figure 4. Mount BACnet MS/TP Communication Module

H3

H4

1

RUNPRG

Pin 1

JTAG PORT

H7

1

H6

1

H5

1

P2

8 7 6 5 4 3 2 1

ON

J1

S3

J2

U3

U1

D4 D3 D2 D1

U6

U4

U5S1

T1

S2

U2

Shield

P3

Signal -

Signal +

Standoff

Standoff

BACnet board connects to the WSHP board via 8 pin header

and plug P4 on back of BACnet board

Figure 5. BACnet MS/TP Connection Schematic Diagram

BACnet MS/TPCommunication

Module

+-

GNDShield

GND or Reference is only used on three wire isolated systems that require a reference

10 IM 928

IM 928 11

Integration Integrating the BACnet MS/TP Communication Module into a BAS involves three steps:

• Connecting the WSHP unit controller to the network • Addressing and establishing communications with the unit controller • Configuring the unit controller

Connecting Unit to the Network After inserting the BACnet Communication Module to the unit controller, connect the unit controller into the BACnet network. 1. Replace network cable plug in P3 (see Figure 3.) 2. Set the MAC Address in Address Switch S3

Note: A MAC (Media Access Control) address must be assigned to the BACnet MS/TP Communication Module. See your network administrator.

3. Apply power to the unit controller.

Note: You must maintain the polarity of the signal throughout the network. Always connect + to + and – to –.

Addressing and Establishing Communications Follow these procedures to properly address and establish communications with the unit controller (see Table 1 for details.) • Verify that the MAC address of the unit controller is unique on the BACnet network • Cycle power to the unit controller • Change the data transmission rate, if necessary • Change the default BACnet MS/TP Address The BACnet MS/TP device address (MAC) Address of the MicroTech III controller in a BACnet Master Slave/Token Passing (MSTP) Local Area Network (LAN) is set in an eight-position dipswitch on the BACnet MS/TP Communication Module. The address is physically set in eight binary switches. Bit 0 of the address corresponds to switch position 1 and bit 7 of the address corresponds to switch position 8. All MicroTech III controllers must be master controllers; therefore, bit 7 is always equal to 0 (open). An open switch (switch up) is a 0, and a closed switch (switch down) is a 1. This address must be unique and is determined during installation.

Note: After you set the address in the switches, you must cycle power (turn the unit controller off and then on again) in order for the new address to take effect.

The D4 LED flickers when the module is receiving data from the network, and the D3 LED flickers when the module is sending data to the network. The default data transmission rate is set to 38400 bps (baud). You can change the data transmission rate from 9600 to 76800 bps. Refer to the MicroTech III WSHP Unit Controller Protocol Information Document, ED 15103, for details. The default BACnet MS/TP network address of the MicroTech III Unit Controller is 2001. You can change this address but it must be the same as all other BACnet devices on the network for devices to communicate with each other. Refer to the MicroTech III WSHP Unit Controller Protocol Information Document, ED 15103, for details.

Configuring the Unit Controller All WSHP unit controllers are loaded with software and configured at the factory for stand-alone operation. The unit is ready to operate with default setpoint parameters that can be changed via a network signal. Refer to the appropriate operation manual for the default values. Refer to the MicroTech III WSHP Unit Controller Protocol Information Document, ED 15103, for details.

12 IM 928

Configurating the BACnet Module to Default Values To set the BACnet Card to default configuration a combination of two switches are used. To configure the Module to its default configuration, press and hold the “DEFAULT” switch S2. While holding this switch, press and release the “RESET” switch S1. The LEDs should flash once, turn off and turn on one after another. Release the “DEFULT” switch S2. The BACnet Module will now have default values

Factory-Installed BACnet MS/TP Communication Module If the WSHP unit controller is equipped with a factory-installed BACnet MS/TP Communication Module, the controller is pre-configured with the values shown in Table 1.

Field-Installed BACnet MS/TP Communication Module A BACnet MS/TP Communication Module can be added to a WSHP unit controller in the field for these reasons: • The unit did not originally ship with a communication module. • The unit originally shipped with a LONWORKS Communication Module but requires replacement with a BACnet

Communication Module.

Table 1. Default Communication Setup Parameter Settings

Parameter Name BACnet MSTP MSTP MAC Address1 Switch Setting MSTP Baud Rate 38400 (9600 to 76800) Device Instance Number2 300? Max APDU Length3 480 Device Object Name4 MTIIIUC_WSHP.0000300

Important Notes 1. The MAC address is set by switch setting on the BACnet MS/TP communication module. 2. The device instance number is factory set at 300. This number must be unique on the network and must be set in the

field. 3. The Max APDU Length parameter should not be set higher than 480 for BACnet MS/TP. 4. The Device Object Name is set to factory default. This must be unique on the network and must be set in the field. 5. You need a computer with a serial port, and serial terminal device application (such as Windows HyperTerminal), and a

serial null modem cable for setting the device instance number. Refer to ED 15103.

Service Information

Troubleshooting If you can control the unit from the thermostat, but you are not able to communicate with unit via the network:

• Verify the network (bus) wiring. • Verify that the Transmit LED (D3) is flickering. • Verify that the MS/TP MAC address (S3) is set in the 0-127 range (Master). • Check the network communication parameters in the unit controller for proper settings.

If the BACnet MS/TP Communication Module still does not respond, contact the McQuay Controls Customer Support group at 866-4McQuay (866-462-7829).

Replacement Parts Contact the McQuay Parts group at 763-553-5451 for replacement parts related to the BACnet MS/TP Communication Module. McQuay does not supply the network connection plug. Description Part Number MicroTech III BACnet MS/TP Communication Module Field Replacement Kit Kit includes the following: • MicroTech III BACnet MS/TP Communication Module • Four stand-offs • IM 928

668994101

This document contains the most current product information as of this printing. For the most current product information, please go to www.mcquay.com.

www.mcquay.com • 800-432-1342

IM 928 13