RKI Instruments 65-2400RK-05 - Manual (Page 12)

Combustilbe Gas Transmitter • 12
9. Secure the junction box cover to the junction box.
Replacing the amplifier
1. Turn off incomming power.
2. Remove the junction box cover.
3. Disconnect the detector leads from the interconnect terminal strip and the controller
wires from the interconnect terminal strip.
4. Unscrew and remove the two screws that secure the amplifier to the junction box.
The screws are at the top left and bottom right of the amplifier.
5. Remove the amplifier.
6. Place the new amplifier in the same position as the amplifier you removed in the
previous step.
7. Use the two screws you removed in step 4 to secure the amplifier to the junction box.
8. Reconnect the wiring from the controller to the interconnect terminal strip as shown
in Table 3 and Figure 3.
9. Reconnect the detector leads to the interconnect terminal strip as shown in Table 4 and
Figure 3.
10. Turn on incomming power.
CAUTION: Allow the detector to warm up for 15 minutes before you continue with the next step.
11. Calibrate the combustible gas transmitter as described in the Calibration section of
this insert.
Table 3: Reconnecting the Combustible Gas Amplifier to a Controller
Amplifier
Interconnect Terminal Strip
Controller Terminals
GND 24 V -
4-20 4-20 mA (Feedback)
24V 24 V +
Table 4: Reconnecting the Combustible Gas Detector to the Amplifier
Detector Lead
Amplifier
Interconnect Terminal Strip
Red SENSOR RED
White SENSOR WHT
Green SENSOR GRN
Black SENSOR BLK