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Chapter 1 Overview
UCM maximum capacities for Tracker models 12 and 24
The Tracker model 12 and 24 controllers can control and monitor specific types and numbers of Trane unit control modules (UCMs) as specified in this topic. The supported UCMs are as follows:
•HVAC controllers that conform to the LonMark® Space Comfort Con- troller (SCC) profile: the primary controller options are the Voyager rooftop with a Tracer
•VariTrac central control panels (CCPs) with a
•Tracer MP503 I/O module.
Table 2 shows the maximum number of each UCM type that can be linked to each Tracker controller model. Any combination of the specified UCMs may be used in aggregate if they do not exceed the maximum. (For example: A fully loaded Tracker 24 controller can control 24 SCC devices, 10 VariTrac CCPs, and 4 Tracer MP503 I/O modules.)
The Trane VariTrac CCP is the main controller for either a changeover bypass system configuration or a delivered variable air volume (VAV) system configuration. Any combination of CCP configurations may be used in aggregate, as long as they do not exceed the maximum.
Note:
•Each VariTrac CCP configured for changeover bypass can control 1 HVAC device and up to 24 VAV UCMs.
•Each VariTrac CCP configured for delivered VAV can con- trol 1 HVAC device and up to 32 VAV UCMs.
•See repeater information, “Requirements for repeaters on Comm5 communication links” on page 37.
Table 2. Tracker controller models 12 and 24 UCM capacities
Tracker model | UCM type | Maximum | |
UCMs | |||
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24 | SCC* | 24 | |
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| |
| Trane VariTrac CCP | 10 | |
|
|
| |
| Tracer MP503 I/O module | 4 | |
|
|
| |
| Total maximum UCMs supported | 38 | |
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| |
12 | SCC* | 12 | |
|
|
| |
| Trane VariTrac CCP | 5 | |
|
|
| |
| Tracer MP503 I/O module | 4 | |
|
|
| |
| Total maximum UCMs supported | 21 | |
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* SCCS supported by Tracker are limited to Voyager rooftops, Precedent rooftops with ReliaTel controls, Tracer ZN517, ZN510, ZN511, and ZN524.
10 |
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