TCI Field Installed Kit Comm3 Comm4

TCI field installation kits can ordered from parts to field install a TCI on Voyager/Reliatel units with RTRMs. See attached document for more information.

 

BAYICS1003A:      3-10 Ton Packaged Rooftop Units with Reliatel Communications Module

                              6-20 Ton Split Systems Units with Reliatel Communications Module

BAYICS1004B:      12 1/2-25 Ton Packaged Rooftop Units with Reliatel Communications Module

                              27 1/2 - 50 Ton Packaged Rooftop Units with Reliatel Communications Module

 

 

9/30/2017

Note: Not all Reliatel units will support a TCI card with Tracer Summit or a VariTrac / CCP System.  A good rule of thumb is if the unit can't be ordered with a TCI card, Tracer Summit or the VariTrac / CCP will not support a field installed TCI interface with this unit.

 

CCP V12 SP7 has CCP III image V4.20.347 which now supports Voyager II and Precedent rooftops which are less than 25T.  Eflex, units with more than 2 compressor are not supported.

 

 

Here are a few examples of units that do not support TCI.

Eflex

Any single zone VAV

Units with more than 2 stages of cooling

Non- Voyager 3 units that are VAV

Any unit with a ECM fan motor

Any unit with a staged fan

 

The problem with the above units is the comm 4 data packet only knows about 2 stages of compressor and a constant volume fan.

The CCP II/CCP III has the ability to tell the RTU to bring on 1 or 2 stages of compressor directly so when it come to bringing on more than 2 stages of cooling, it could bring on the rest of the stages or maybe not bring on any others. This is unknown as it is not tested or supported.

The other problem is having a non constant volume fan. When the CCP II or CCP III goes through calibration to find the reference static pressure setpt, the bypass damper is closed, the boxes are driven to the max flow position and the fan is turned on. For units that have a multi-speed fan (ECM or staged fan) and the fan is commanded on, those units run the fan at low speed and the reference static pressure setpt is found. The problem comes in when the system is running heating or cooling is on, the fan runs at a higher speed. The bypass is still using the static pressure setpt found when the fan is running at low speed and bypasses a bunch of air into the return of the RTU. Now the bypass air is being reconditioned by the RTU again and can possibly cause supply air high temp trips or on a refrigerant low pressure cutout.

 

Questions:

What units can I put a TCI card on?

What Reliatel units support TCI?

What Reliatel units do no support TCI?