RKI Instruments Pioneer 4W - Manual (Page 68)

Combustilbe Gas Transmitter • 22 Pioneer Operator’s Manual (PRELIMINARY)
Replacing Components of the Combustible Gas Transmitter
This section includes procedure to replace the combustible gas detector and amplifier.
Replacing the combustible gas detector
1. Place the Pioneer’s power switch in the OFF position.
2. Remove the junction box cover.
3. Disconnect the detector leads from the detector terminal strip. Note the position of the
color-coded leads as you remove them.
4. Unscrew the detector from the junction box.
5. Guide the detector leads of the replacement detector through the bottom conduit hub
of the junction box, then screw the mounting threads of the detector into the conduit
hub.
6. Connect the detector leads to the detector terminal strip as shown in Table 3 and
Figure 3, Wiring the Combustible Gas Transmitter to the Pioneer Gas Monitor.
7. Place the Pioneer’s power switch in the ON position.
CAUTION: Allow the replacement detector to warm up for 15 minutes before you continue with
the next step.
8. Calibrate the replacement detector as described in the Calibration section of this
insert.
9. Secure the junction box cover to the junction box.
Replacing the amplifier
1. Place the Pioneer’s power switch in the OFF position.
2. Remove the junction box cover.
3. Disconnect the detector leads 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.
Table 3: 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