User Manual

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