DCN 141-01064 -06 1/02/09
13
SYSTEM CHECKOUT
It is strongly recommended that you hook-up and run a simple bench test before installing this controller.
Not only will this save you time in system checkout but will also familiarize you with the ZCV2 operation.
Quick Test
NOTE: Before power up, set the dipswitch, DIPSW1, to ALL OFF.
1. Connect a Wall Display Unit to ZONE 1 input on the Control Unit with a 3 foot 4 wire cable.
2. Connect the 24VAC transformer to the Control Unit.
3. Plug the transformer into a 110v outlet and apply power to the Control Unit.
4. Verify Power Status LED is flashing.
5. Verify the WDU display comes on and shows the current temperature.
a. If no display or a “CF” display is shown on the WDU, double check your wiring.
b. Do not proceed until the current temperature is displayed on the WDU and communications
between it and the Control Unit is OK. Any problems will result in a “CF” (Communications Failure) display
on the WDU.
6. Press the Fan button on the WDU. The Control Unit Fan LED and relay should turn on. Also all
damper LED’s should turn on except Zone 1.
7. Press the Fan button again. The Fan LED and all relays should turn off.
8. Press the Mode button until the WDU is showing “H” for Heat Mode.
9. Press the Setpoint Up button until the setpoint is above the current temperature. The Heat LED and
relay should come on.
10. Press the Mode button until the WDU is showing “O” for OFF. The Heat LED and relay will turn OFF.
11. Press the Mode button until the WDU is showing “C” for Cool Mode.
12. Press the Setpoint Down button until the setpoint is below the current temperature. The Cool and Fan
LEDs and relays should turn on.
13. Press the mode button until the WDU is showing “O” for OFF Mode.
14. All LEDs and relays should turn off.
15. When you have successfully completed all these tests, you have verified that the Control Unit and the
WDU are working and communicating correctly.
Communications Test with a PC
1. With the Control Unit and WDU connected as above, proceed with connecting the ZCV2’s RS485
connection to a PC serial port (COM1) using a RS232 to RS485 converter (Model 485DBTB or eqv).
Note: If not using a RCS RS485 Converter, be sure the converter supports Send Data Control.
2. Set ZCV2 base address to 1
3. Start the Hyperterm terminal emulator program in Windows/Accessories/Communications/Hyper
Terminal.
4. Set Hyperterm communications parameters for COM1 to 9600 baud, no parity, 8 data bits, 1 stop bit
and NO flow control.
5. Set CAPS lock on (Commands are case sensitive).
6. Send the Request for Status command R=1. Type “A=1 R=1” followed by the carriage return (cr).
7. ZCV2 should respond with the R=1 status response showing temp, setpoint, mode and fan for zone 1
(A=00 O=1 Z=1 T=(current temp) SP=70 M=0 F=0)
8. Set zone 1 Mode to Heat. Type “A=1 M=H (or 1) cr”.
9. Zone 1 WDU should change to show the new mode is “H”.
10. Set zone 1 setpoint to 78 degrees. Type “A=1 SP=78 cr”
11. Zone 1 WDU should change to show a setpoint update of “78”.
12. If the WDU responds properly to these commands, proceed with installation.
It is recommended that you install the ZCV2 and then rerun these quick tests BEFORE you connect the
Control Unit to the HVAC system. You will be confident that the ZCV2 is working correctly before you
attempt to interface the HVAC system.
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