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.
