Zonex GEN II-R, Installation And Application Manual

14

System Start Up and Test

1.   Plug all thermostats into sub-bases. Turn 

GEN II-R

power switch 

(E

) to ON.

2.   Find the first damper control board in the Daisy chain and set its address to 01.

3.   Turn 

GEN II-R

power switch OFF and then ON. The Display should flash 01 and then show the 

leaving  air  temperature.  This  confirms  your  successful  wiring  and  communication  with  that 

thermostat.

4.   If 01 is displayed, change the next damper control board address to 02. Turn the 

   GEN II-R

switch OFF and then ON. Th

   e display should flash 02 and then show the temperature. Re-

address damper control boards one at a time.

5.   After each damper board is re-addressed, turn the power switch OFF and then ON. This will 

verify that the re-addressed damper board has been found by the 

GEN II-R

Controller.

This procedure will simplify your installation and will confirm your wiring is correct and that the 

GEN 

II-R

controller can communicate over the 2-wire twisted pair data link with every thermostat in your 

system.

SYSTEM START UP AND TEST

Troubleshooting

When stat #1 is not found:

1. Check damper control board to verify that it is addressed as 01.
2. Check all TR1 and TR2 wiring for proper color-to-color connections. Even if the stats are powered

    all R wires at the damper control board must be connected to the GEN II-R TR1 terminal. All C wires

    must  be connected to the GEN II-R TR2 terminal. Confirm the daisy chain wiring is correct at this

    time.
3. Check A, B wires for proper color code and connections; polarity is imperative. All A connec-

    tions must land on A terminal on each of damper control board, and all B connections must connect 

    to B terminal on each damper control board.
4. Check TR1 and TR2 wires for opens or shorts.

Checking the Daisy Chain for opens or shorts:

Start from the GEN II-R board, and follow A, B wires to the first damper control board. Remove the A, 

B wires going to the next damper control board in the link and address the first damper control board 

as #1. Turn the GEN II-R power switch Off, then On, to see if the display flashes 01, at the GEN II-R 

controller.

1. If 01 is displayed, the first link of the daisy chain is OK. Reconnect the wires going to sub-base.
2. Repeat these steps with a stat numbered 02. If the number 02 is displayed, then communication is
    confirmed.

When the correct number does not appear for a link, that link is either shorted or open. 

A link of the 

daisy chain, which is open or shorted, must be repaired before the next damper is checked.

When the damper control boards are correctly addressed, wired and linked, the total number of stats 

on your job connected to the GEN II-R control board will be displayed when the board is turned on.

After the correct number of connected damper control boards is displayed, complete the wiring of the 

AC unit or heat pump connections, next make heat and cool calls to the GEN II-R controller.