VEC100 Generic RTU Controller, Staged Heating
and Modulated Cooling Quick Start Guide
LIT-12013487
2021-07-14

About this guide

This quick start guide provides the basic information you need to configure and install the Verasys® Equipment Controller (VEC), LC-VEC100-0, using the Verasys generic
rooftop unit (RTU) staged heating and modulated cooling controller application. The application controls a third-party changeover bypass (COBP) system or a third-party variable air volume  (VAV)unit.
For  further  information, refer to the Verasys Equipment Controller (VEC) Installation Guide (24-10143-1272) and  theVEC100  GenericRTU  Controller, StagedHeating and
Modulated Cooling Application Note (12013485).
Table 1: Application features 

Mounting the controller

To mount the controller, complete the following steps:

1. Mount a 20 cm (8 in.) section of 35 mm (1.3 in.) DIN rail horizontally.
   Note: Mount the controller in the horizontal position.
2. On the back of the controller, extend the two mounting clips.

Figure 1: Pull down lower mounting clips

3. Place the controller on the DIN rail.
4. Push the bottom mounting clips inward (up) to secure the controller on the DIN rail.
Figure 2: Push up lower mounting clips

Wiring the controller

Zone bus terminal block
The zone bus terminal block is a grey, removable, 4terminal plug that fits into a board-mounted jack. Wire the removable zone bus terminal block plugs on the controller on the top row of the stacked connector, and other field controllers in a daisy-chain configuration using a 3-wire twisted, shielded cable as shown in the following figure.

Figure 3: Zone bus terminal block wiring

Table 2: Zone bus daisy-chaining configuration

Note: The zone bus shield (SHD) terminal is isolated and can be used to connect (daisy chain) the shields for zone bus wiring.

Supply power terminal block
The 24 VAC supply power terminal block is a gray,  removable, 3-terminal plug that fits into a board-mounted jack on the top right of the controller. Wire the 24 VAC supply power wires from the transformer to the HOT and COM terminals on the terminal plug, as shown in the following figure. The middle terminal on the supply power terminal block is not used.

Figure 5: 24 VAC Supply Power Terminal Block

Note: The supply power wire colors may be different on transformers from other manufacturers. Refer to the transformer manufacturer’s instructions and the project installation drawings for wiring details.

Setting the VEC address using the local display
To set the VEC address using the local display, complete the following steps:

1. To access the menu, press the ENT (Enter) button.
2. Navigate to the Controller menu with the up and down arrows, and press the ENT button.
3. In the Controller menu, navigate to Network and press the ENT button.
4. In the Network Parameters section, navigate to Address and press the ENT button. The display shows the default address value.
5. Press the ENT button. The address blinks.
6. Use the up or down arrow to increase or decrease the address to the value you want. Press the ENT button. The address stops blinking and the display shows the old address.
7.  Press either the up or down arrow. The screen refreshes to the new address.
8. Press ESC (Escape) repeatedly, until you return to the main screen. Ensure that the main screen shows that the system is operational.

Configuring sensors

To configure the installed sensors, complete the following steps:

1. Navigate to the Details menu.
2.  Navigate to the Service menu and select the Inputs section.
3. Select the installed sensors using the drop-down menus for each parameter.

Updating the VEC

To update the VEC with the staged heating and modulated cooling application, complete the following steps:

1. Go to verasyscontrols.com, and log in with your credentials.
2. Navigate to Product Information & Support > Device Updates.
3. Download the package file for the application to the root folder of a USB 2.0 drive. The package file name is the following: VEC100-StgHTGModCLG_xxxx.pkg
   Note: Ensure that the USB drive is formatted exFAT or FAT32.
4. Insert the USB drive into the USB port on the VEC.
5. If the download does not start immediately, then the controller’s local display, select the Update and Load Firmware option, then choose the package file on the USB drive, and press Enter.
6. When the application update finishes, use the Verasys Smart Building Hub (SBH) or the local display to configure the controller.

COBP wiring diagram

Figure 6: Changeover bypass wiring diagram – VEC100

Figure 7: Changeover bypass wiring diagram – IOM3711

Table 4: Changeover bypass wiring diagram

Table 4: Changeover bypass wiring diagram

VAV wiring diagram

Figure 8: VAV wiring diagram – VEC100

Figure 9: VAV wiring diagram – IOM3711

Table 5: VAV wiring diagram

Table 5: VAV wiring diagram

Commissioning the system

To activate the outputs and verify system operation, navigate to the Commissioning menu, change Start Commissioning to Trigger, and adjust outputs individually. The following table describes the Details > Service > Factory menu options.

Table 6: Details : Service: Factory  

Product warranty
This product is covered by a limited warranty, details
of which can be found at www.johnsoncontrols.com/buildingswarranty.
Contact Johnson Controls: www.johnsoncontrols.com/contact-us

Software terms

Contact information

Documents / Resources

	VERASYS VEC100 Generic RTU Controller Staged Heating and Modulated Cooling [pdf] User Guide VEC100 Generic RTU Controller Staged Heating and Modulated Cooling, VEC100, Generic RTU Controller Staged Heating and Modulated Cooling
	VERASYS VEC100 Generic RTU Controller Staged Heating and Modulated Cooling [pdf] User Guide VEC100 Generic RTU Controller Staged Heating and Modulated Cooling, VEC100, Generic RTU Controller Staged Heating and Modulated Cooling

References

• User Manual