Installation and Maintenance Manual
IM 730-0
Group
: McQuay Controls
Date
: July 2002
© 2002 McQuay International
MicroTech II™AAF®HermanNelson® Unit Ventilator Controller
N2 Open Communication Modules
Страница 1: ...Installation and Maintenance Manual IM 730 0 Group McQuay Controls Date July 2002 2002 McQuay International MicroTech II AAF HermanNelson Unit Ventilator Controller N2 Open Communication Modules...
Страница 2: ...ese steps 9 To replace a MicroTech II N2 communication module on a MicroTech II Unit Controller board follow these steps 10 SERVICE INFORMATION 12 TEST PROCEDURES 12 LIST OF REPLACEABLE PARTS 12 Netwo...
Страница 3: ...Model 12 OM756 www McQuay com 4 pipe Heat Cool Valve Control Software Model 13 4 pipe Heat Cool F BP Damper Control Software Model 14 OM757 www McQuay com 2 pipe Cooling Only Valve Control Software Mo...
Страница 4: ...e 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 rad...
Страница 5: ...e of N2 points between the network and the Unit Controller Component Data Figure 2 shows the major components of the communication module Figure 2 MicroTech II N2 communication module major components...
Страница 6: ...s 1 through 253 Figure 3 Address switch S1 Dip switch settings and how they work When a switch is in the up open position its value is 0 So when all the switches are in the up there is no module addre...
Страница 7: ...Bus Information The N2 communication Bus is a local network that links controllers and point interfaces to the Network Control module NCM The N2 Bus uses a master slave protocol in which the master d...
Страница 8: ...o the bus when you reach 49 devices Count each repeater as one device Any path from the NCM to an N2 device cannot go through more than two repeaters or two pairs of fiber modems i e cascaded repeater...
Страница 9: ...e locking standoffs into the holes on the board Then locate the empty connector for the MicroTech II N2 communication module on the Unit Controller board see Figure 8 4 Orient the communication module...
Страница 10: ...module from each standoff and pull the module over the standoffs 7 Gently lift the MicroTech II N2 communication module from the Unit Controller board 8 Locate the empty connector pins and three stand...
Страница 11: ...IM 730 0 11 Figure 8 Communication module mounting detail Figure 9 N2 module typical wiring...
Страница 12: ...twork Connection Plug Generic Replacement Parts The three contact network connector plug has custom markings but if you lose this terminal block you can replace it with a standard block without the ma...
