7
1. Prodigy 2.0 – M3 Unit Controller Description
The M3 unit controller provides all rooftop unit control functions to insure its safe and reliable operation. It also provides
status and diagnostic information to facilitate troubleshooting. The controller's programmable parameters allow
adjustment of time delays and set points that enable advanced features.
The default configuration requires a standard room thermostat or direct digital controller. By changing a single parameter,
the M3 unit controller can also control the unit from a room sensor. The M3 unit controller can also be configured as a
network controller when daisy-chained to the L Connection
®
Network. To simplify configuration, the M3 unit controller
may be connected to a computer (Microsoft
®
Windows-based) which has the M3 unit controller software installed.
1.1. Unit Sizes
Model Size Tonnage Model Size Tonnage
036 3-ton 122 10-ton
048 4-ton 150 12.5-ton
060 5-ton 152 12.5-ton
072 6-ton 156 13-ton
074 6-ton 180 15-ton
092 7.5-ton 210 17.5-ton
094 7.5-ton 240 20-ton
102 8.5-ton 300 25-ton
120 10-ton S = Standard Efficiency; H = High Efficiency; U = Ultra-High Efficiency
1.2. Add-on Controllers
Add-on controllers connect to the M3 unit controller to build variations according to application or equipment type.
Table 1. Add On Controllers
Packaged Unit
Box Size
A55 A178 (C3 Control)
GP3 Control
1
Models M3 Unit Controller
#3 & 4 Compressor Control and
2
nd
Heat Circuit
General Purpose
Digital and
Analog I/O
LCH/LGH 036-060S A X O
LCH/LGH 036-060H A X O
LCH/LGH 072H and 074H A X O
LCH/LGH 036-074U
2
A X O
LCH/LGH 092-150H / S B X O
LCH/LGH 094U, 122U and 152U B X O
LCH/LGH 156 H C X X O
LCH/LGH 180 H C X X O
LCH/LGH 180 U C X X X
LCH/LGH 210 H C X X O
LCH/LGH 240H/300S C X X O
LCH/LGH 240 U C X X X
X = required O = Optional
1
If additional general purpose analog and digital outputs are required, the GP3 card will be required. Order catalog # 13J78 for the GP3 kit.
2
Requires A55 part number 104661-xx)
Figure 1 shows the M3 unit controller components and the location of the add-on control expansion ports.
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