Unit installation

8 IM 736-4
Installation
The BACnet Communication Module can be factory or field installed. The sales representative
should use the appropriate chiller selection software program in McQuayTools™ to include the
BACnet Communication Module with the unit.
For field installation, the BACnet Communication Module kit may be ordered through the McQuay
sales office or through McQuay Parts. The BACnet Communication Module kit includes the BACnet
Communication Module, cables, serial card connector, and this installation manual. The BACnet
Communication Module is also sold separately (i.e. just the module itself) through McQuay Parts.
See Replaceable Parts List for part numbers.
Mounting
Installing a new BACnet Communication Module
You can add a new BACnet Communication Module to the MicroTech II control system in order to
incorporate it into an existing BACnet network.
Mounting a BACnet Communication Module
To mount a BACnet Communication Module:
1. Remove power from the MicroTech II Chiller Unit Controller.
2. See Table 1 for BACnet Communication Module location and mount the module. Where studs
are indicated, mount the module on the studs with the hardware included in the kit (see Figure 3).
For other locations, drill mounting holes using the module as a template, exercising care not to
drill through to a component or wiring. Secure the module with machine screws.
Table 1. Module Location and Power Wiring
Chiller Model
Power Connection Terminals Mounting Location
AGS-B HOT>TB1-60, COM>TB1-75 Studs in control panel
AGZ-A/ACZ-A HOT>31-32, COM>21-28 Studs inside left-hand control panel door
AGZ-B/ACZ-B HOT>42-54, COM>81-84 Upper right-hand corner of control panel door
AGS-C HOT>TB1-60, COM>TB1-75 Studs in control panel
HSC HOT>UTB1-70, COM>UTB1-71 Studs on door of the unit control panel
HDC HOT>UTB1-70, COM>UTB1-71 Studs on door of the unit control panel
TSC HOT>UTB1-70, COM>UTB1-71 Studs on door of the unit control panel
WCC HOT>UTB1-70, COM>UTB1-71 Studs on door of the unit control panel
WDC HOT>UTB1-70, COM>UTB1-71 Studs on door of the unit control panel
WGS HOT>42-54, COM>81-84 Mount horizontally behind the unit controller
WGZ HOT>31-43, COM>56-60 Upper right-hand corner of control panel door
WMC HOT>UTB1-70, COM>UTB1-71 Studs on top of the panel door
WPV HOT>UTB1-70, COM>UTB1-71 Studs on door of the unit control panel
WSC HOT>UTB1-70, COM>UTB1-71 Studs on door of the unit control panel
NOTES:
a. If a range of terminal numbers is given, such as 42-54, connect to any terminal in the range.
b. The two-pin power connector wires are marked HOT and COM (common).
3. Locate the Serial Card slot on the MicroTech II Chiller Unit Controller (see Figure 4.)
4. Remove the cover from the Serial Card slot if it has not already been removed. Use a small
screwdriver to pry the cover off from one end.
5. Remove the plastic knock-out in the cover.