CD-Wxx-00-0 Series Wall Mount CO
2
Transmitter Installation Instructions
7
8. Reconnect the wires to the relay screw terminal.
9. Reconnect power to the transmitter.
10. Reposition the cover, shown in Figure 3.
Testing the Relay and Display Module
To confirm that the the relay and display are operating
correctly, perform the following procedure:
1. Test the relay following Step 1 through Step 10 in
the previous section,
Testing the Relay Module
.
Note:
When the relay contacts are closed, the yellow
LED next to the display should be on.
2. A
CO
2
concentration should be displayed. If not,
replace the unit.
3. Reposition the cover. (See Figure 3.)
Testing the Temperature Module
To confirm that the temperature module is operating
correctly, perform the following procedure:
1. Temporarily turn off power to the unit.
2. Observing polarity, connect a voltmeter across the
screw terminals and – (see Figure 10).
3. Apply power to the transmitter.
4. Apply heat to the temperature sensor by gently
holding it between a finger and thumb (see
Figure 10).
5. Verify that the voltage reading rises. If no increase
is noted, replace the module.
6. Disconnect power to the transmitter.
7. Disconnect the voltmeter from the temperature
module screw terminals.
8. Apply power to the transmitter.
9. Reposition the cover. (See Figure 3.)
Repairs and Replacement
The following modules are replaceable:
•
Relay
Module
ACC-CD-R
•
Relay and Display Module ACC-CD-DR
•
Temperature Module ACC-CD-A
