Wiring - Johnson Controls - TEC3022-1x-xxx - TEC3023-1x-xxx - TEC312x-14-xxx - TEC3322-1x-xxx - TEC3323-1x-xxx - TEC3622-1x-xxx - TEC3623-1x-xxx - Proportional Fan Coil Thermostat - Thermostats - TEC3000 Series Networked and Wireless Proportional Fan Coil and Individual Zone thermostats with Dehumidification Capability

About this task

When you replace an existing thermostat, remove and label the wires to identify the terminal functions.

WARNING

Risk of Electric Shock
Disconnect the power supply before making electrical connections to avoid electric shock.

Avertissement

Risque de décharge électrique
Débrancher l'alimentation avant de réaliser tout raccordement électrique afin d'éviter tout risque de décharge électrique.

CAUTION

Risk of Property Damage
Do not apply power to the system before checking all wiring connections. Short circuited or improperly connected wires may result in permanent damage to the equipment.

ATTENTION

Risque de dégâts matériels
Ne pas mettre le système sous tension avant d'avoir vérifié tous les raccords de câblage. Des fils formant un court-circuit ou connectés de façon incorrecte risquent d'endommager irrémédiablement l'équipement.

Important: Make all wiring connections in accordance with local, national, and regional regulations. Do not exceed the electrical ratings of the TEC3000 Series thermostat.

Important: Use correct ESD precautions during installation and servicing to avoid damage to the electronic circuits of the thermostat.

To wire the thermostat, complete the following steps:

Procedure

Strip the ends of each wire 1/4 in. (6 mm) and connect them to the appropriate screw terminals as indicated in Table 1.

Note: For more details on wiring the MS/TP Communications Bus, refer to the MS/TP Communications Bus Technical Bulletin (LIT-12011034).
Attach the communication wires to the terminal block.

Note: If multiple wires are inserted into the terminals, make sure to correctly twist the wires together before inserting them into the terminal connectors.
Carefully push any excess wire back into the wall.

Note: Seal the hole in the wall with fireproof material to prevent drafts from affecting the ambient temperature readings.
For networked models, set the bus end-of-line (EOL) termination switch to the desired location.

You can designate the thermostat as the end of the Field Controller (FC) Bus and N2 Bus through the bus EOL termination switch. The default position is OFF. If the thermostat is at the end of a daisy chain of devices on the FC Bus and N2 Bus, set the EOL switch to the ON position. See Figure 2.
Reattach the thermostat cover to the mounting base (bottom side first).

Important: Make sure you reattach the cover that corresponds to its correct base. The CPU board number needs to match the base board number. Otherwise, an operation error occurs after you reattach a cover and base that do not belong together.
Use a 1/16 in. (1.5 mm) Allen wrench or Johnson Controls T-4000-119 Allen-Head Adjustment Tool (order separately) to reinstall the security screw on the top of the thermostat cover. See Figure 1 for security screw placement.
Remove the protective plastic cover sheet from the display.
Important: If the display is dirty, gently wipe it clean with isopropyl alcohol or ethyl alcohol. Do not scrub hard as to avoid damaging the surface. Do not use other cleaners such as water, ketones, and aromatic solvents, since they may damage the polarizer.
Notes:
- For VAV and two-pipe systems, connect the valve to the heating output.
- Only one transformer is required for each TEC.
- Power to the AUX contact comes from the reheat coil.