Installing a Clear Language Display in an RTAA 130-400 Chiller

Issue:

Installing a Clear Language Display in a 130-400 Ton Chiller

Resolution:

Update to a Clear Language Display on RTAA 130-400 Ton Chillers

SEE ATTACHED DOCUMENT RTAA-SVN06A-EN

This is a step by step method to install a Clear Language Display (CLD) in early model RTAA 130 to 400 air cooled chillers. These early model chillers used a coded display to set parameters, check set points, and monitor chiller performance. It is now possible to update to a newer Clear Language Display (CLD) controller used on smaller 70 ton to 125 ton RTAA chillers. This is a more modern technology and requires a minimum of hardware changes.

The following can be obtained from your Trane parts department:

• (1) Control Power transformer (TRR00463) 120VAC primary, 24VAC secondary.
• (1) 1U1 Module (X13650476-10N) MOD00057.
• (1) CLD Display Module (X13650781-02) MOD00874.
• (1) HLD0079 in-line fuse holder and 1/2A fast blowing fuse wired in-line for the CLD.
• (2) 3-pin phoenix connectors  (CON 0430).

The following can be obtained locally:

1. A Suitable weather tight enclosure for the CLD (X????????-??) of size 12L x 10.5W x 2.25D with 11L x 9.5W opening on the face and a 1.5 diameter hole punched opposite the face opening located approximately 1.5 from the width and long ends such that the hole is located in the corner
2. OR cut an opening 11L x 9.5W in the RTAA control cabinet door and use the CLD mounting holes for a template. (Drawing required)
3. Or the CLD module can be adhered to the newly installed 1U1 module with double stick tape and centered in the existing opening of the RTAA control cabinet door. Edges will need to be sealed with weather strip to keep control cabinet water resistant.
4. Wire nuts, 22-14ga. Orange.
5. Single pair braided, twisted shielded communication wire, 10ft, 24-18ga.
6. 2-conductor jacketed 18-16ga. copper braided wire to make up transformer secondary.
7. 2-conductor 14ga copper 85C rated wire to make up primary side electrical connection.

!!! IMPORTANT!!! Prior to making any hardware changes to your chiller, create a detailed listing of settings, values and other notations (if possible) from the current chiller controller (1U1) from the P4 and P5 menus. These values will help to program the new CLD controller.

The hardware changeover is a very straightforward process.

The replacement 1U1 module for the existing 1U1 module (blue display) is a direct wire for wire, plug for plug and connector for connector replacement.

There is an additional termination on the replacement 1U1 module for pump output and it can be utilized upon installation.

Trane recommends labeling the connections to simplify the installation of the updated 1U1 module.

Once the connections are labeled:

• Remove the existing 1U1 module.
• Replace the removed 1U1 module with the new module.
• Reconnect all wires and plugs to the appropriate locations.
• Determine a suitable location and mount the CLD enclosure on the control cabinet door exterior, using the enclosure as a template for the access opening to route the communication wire and power wire from the CLD enclosure to the electrical connections inside the cabinet, or simply cut an opening as in bullet #2 above. THE BEST OPTION IS Bullet #3 above!
• Determine a suitable mounting location for the CLD power supply transformer and related interconnections such that there is sufficient wire length to connect both primary and s.econdary connections.
• Locate the communications header pins (IPC), J1-4 (+), J1-3(-) on the last module in the IPC line and either splice in to the IPC bus with a twisted pair or remake a new 2 pin MTA connector assuring the polarity is correct and plug it on to the J1-4,J1-3 location.
• Connect one of the phoenix connectors with the correct polarity {CLD J1-1 (+); J1-2 (-)} to this twisted pair wire. Be sure to use sufficient length to make all connections tension free. You can now route the IPC connection from the 1U1 through the cabinet to the CLD enclosure.
• Make up the required 24VAC (secondary) and 120VAC (primary) side connections using the wire nuts and making those primary side connections to the 1TB3 terminal block (1TB3-1, 1TB3-2) on the chiller.
• Make up the secondary transformer connections for the CLD by using the other 3 pin phoenix connector on the 24VAC side of the transformer, keeping in mind the correct pins to use on the CLD are J2-1, J2-2. Once these connections are made, power can now be applied.
• Refer to the appropriate IOM for your chiller and program the newly installed controller.
• Be sure to have the correct IPC DIP switch address settings (SW1) on the compressor modules.
• Refer to RTAA-SVD03A-EN, for more information. Be sure to press Enter after each selection when programming the CLD. In the Operator Settings menu, toggle through the list and populate the controller with the settings previously recorded from the original controller.
• Once these settings have been entered, proceed to the Service Settings menu and populate the values as in the previous step.
• Continue to the Service Setup menu (+ + - - + +), and populate the values.
• The next menu, Machine Configuration menu (+ - + - + -) will have compressor and size information specific to your chiller. Again, be sure to have the correct values.
  Now the chiller controller is fully programmed, press Auto.

An added benefit is now the chiller can use LON-Talk communications protocol as the new 1U1 module is supported by LON.

Notes:

See also RTAA-SB21 , RTAA-SB22

Changes:

Other Question/Problem/Cause Statements:

• Can I Install a CLD in an older (130 - 400 ton) Chiller?
• Will a CLD work in a 130-400 Ton RTAA?
• Can I add a clear language display in place of the coded display?
• What is the procedure for changing the coded display with a clear language display?
• Update the controller?
• UCP2 controller on RTAA?
• LON talk on RTAA?
• RTAA controller upgrade?
• RTAA controller update?
• UCM update on RTAA.
• UCM update on RTAA?
• CH530 on RTAA?

Facts:

• RTAA
• Air-Cooled Chiller (Pueblo) (RTAA 130-400 Ton)
• Air-Cooled Chiller (Pueblo) (RTAA 70-125 Ton)