McQuay MicroTech II N2 Maintenance Manual
Installation and Maintenance Manual
Group: McQuay Controls
Date: July 2002
MicroTech II™
AAF®HermanNelson® Unit Ventilator Controller
N2 Open Communication Modules
IM 730-0
© 2002 McQuay International
Contents
GENERAL INFORMATION ............................................................................................................ 4
DESCRIPTION ..................................................................................................................................... 4
APPLICATION .....................................................................................................................................5
COMPONENT DATA ............................................................................................................................ 5
N2 Network Connection ................................................................................................................ 5
Address Switch .............................................................................................................................. 6
Dip switch settings and how they work .................................................................................................... 6
12-Pin Header............................................................................................................................... 6
INTEGRATION.................................................................................................................................. 7
CONFIGURING THE UNIT CONTROLLER .............................................................................................. 7
NETWORK CONNECTION ....................................................................................................................7
N2 Open Addressing ..................................................................................................................... 7
N2 Bus Information....................................................................................................................... 7
Selecting the Right Cable.............................................................................................................. 7
N2 Bus Rules ................................................................................................................................. 8
Number of Devices........................................................................................................................ 8
Line Length and Type.................................................................................................................... 8
INSTALLATION................................................................................................................................ 9
To mount a new MicroTech II N2 communication module onto the Unit Controller board,
follow these steps: ......................................................................................................................... 9
To replace a MicroTech II N2 communication module on a MicroTech II Unit Controller board,
follow these steps: ....................................................................................................................... 10
Figures
SERVICE INFORMATION ............................................................................................................ 12
TEST PROCEDURES........................................................................................................................... 12
LIST OF REPLACEABLE PARTS.......................................................................................................... 12
Network Connection Plug ........................................................................................................... 12
Generic Replacement Parts ..................................................................................................................... 12
Direct Replacement Parts........................................................................................................................ 12
Kit................................................................................................................................................ 12
FIGURE 1: N2 COMMUNICATION MODULE.............................................................................................. 5
FIGURE 2. MICROTECH II N2 COMMUNICATION MODULE MAJOR COMPONENTS.................................... 5
FIGURE 3. ADDRESS SWITCH (S1) .......................................................................................................... 6
FIGURE 4. DIP SWITCH VALUES (WHEN CLOSED).................................................................................... 6
FIGURE 5. ADDRESS SWITCH (S1) SET TO EXAMPLE............................................................................... 6
FIGURE 6. N2 BUS RULES...................................................................................................................... 8
FIGURE 7. COMMUNICATION MODULE MOUNTED ON THE UNIT CONTROLLER BOARD ......................... 10
FIGURE 8. COMMUNICATION MODULE MOUNTING DETAIL ...................................................................11
FIGURE 9. N2 MODULE TYPICAL WIRING.............................................................................................. 11
2 IM 730-0
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.
Revision History
IM 732 August 1, 2002 Initial Release
Reference Documents
Number Source Title
OM748 www.McQuay.com Air Source Heat Pump with Electric Heat (Software Model 00)
OM749 www.McQuay.com Water Source Heat Pump with Electric Heat (Software Model 02)
OM750 www.McQuay.com DX Cooling with Electric Heat (Software Model 04)
OM751 www.McQuay.com DX Cooling Only (Software Model 05)
OM752 www.McQuay.com Electric Heat Only (Software Model 06)
OM753 www.McQuay.com DX Cooling with Wet Heat - Valve Control (Software Model 07)
OM754 www.McQuay.com 2-pipe Wet Heat Only - Valve Control (Software Model 09)
OM755 www.McQuay.com 2-pipe Heat/Cool - Valve Control (Software Model 11)
OM756 www.McQuay.com 4-pipe Heat/Cool - Valve Control (Software Model 13)
OM757 www.McQuay.com 2-pipe Cooling Only - Valve Control (Software Model 15)
OM758 www.McQuay.com 2-pipe Cooling with Electric Heat - Valve Control (Software Model 17)
ED 15069 www.McQuay.com MicroTech II™ Unit Ventilator Unit Controller
ED 15065 www.McQuay.com MicroTech II™ AAF®-HermanNelson® Unit Ventilator Unit Controller Protocol
IM731 www.McQuay.com MicroTech II™ AAF®HermanNelson® Unit Ventilator Controller BACnet®
IM747 www.McQuay.com MicroTech II™ Unit Ventilator Unit Controls Installation Manual
www.johnsoncontrols.com/Metasys/n2open.htm N2 -- A Data Communication Protocol for Building Automation and
Water Source Heat Pump without Electric Heat (Software Model 03)
DX Cooling with Wet Heat - F&BP Damper Control (Software Model 08)
2-pipe Wet Heat Only - F&BP Damper Control (Software Model 10)
2-pipe Heat/Cool - F&BP Damper Control (Software Model 12)
4-pipe Heat/Cool - F&BP Damper Control (Software Model 14)
2-pipe Cooling Only - F&BP Damper Control (Software Model 16)
2-pipe Cooling with Electric Heat - F&BP Damper Control (Software Model 18)
Protocol Implementation Conformance Statement
Information
Communication modules
Control Networks
Notice
Copyright © 2002 McQuay International, Minneapolis MN All rights reserved throughout the world
™ The following are trademarks or registered trademarks of their respective companies: N2 Open from Johnson Controls
Corporation, Protocol Selectability, MicroTech II, and AAF-HermanNelson from McQuay International.
IM 730-0 3
General Information
Use this manual to physically install the communication module onto the Unit Ventilator Unit
Controller board and to make the wiring connections to your network. You also need the appropriate
McQuay Engineering Data Sheet known as the Protocol Information to integrate the unit into your
network. The Protocol Information contains addressing details, N2 Open protocol information, and a
list of the data points available to the network. See the Reference Documents section of this
document for part numbers of Protocol Information manuals. These documents are available from
your local McQuay International representative and for downloading at the McQuay International
web site: www.mcquay.com.
Electric shock hazard. Can cause personal injury or equipment damage.
This equipment must be properly grounded. Only personnel that are knowledgeable in the
operation of the equipment being controlled must perform connections and service to the
MicroTech II control panel.
Static sensitive components. Can cause equipment damage.
!
WARNING
!
CAUTION
Description
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.
A MicroTech II N2 Open communication module incorporates a MicroTech II Unit Controller into
an N2 Open Local Area Network (LAN). This combination provides an interface to the buildingautomation network.
The MicroTech II N2 communication module is a printed-circuit board that plugs onto the
MicroTech II Unit Controller board. Figure 1 shows an outline drawing of the N2 communication
module with reference dimensions.
4 IM 730-0
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