65-2462RK Hydrogen Transmitter • 15
9. Turn on power to the controller.
10. Turn on the controller and place it into normal operation.
CAUTION:
Allow the replacement detector to warm up for 5 minutes
before you continue with the
next step.
11. Calibrate the transmitter as described in “Calibration” on page 16 of this manual.
Replacing the Amplifier
1. Turn off power to the controller.
2. Place the controller’s on/off switch in the OFF position.
3. Remove the junction box cover.
4. Unplug the detector terminal strip and controller terminal strip from their sockets. You may leave
the wires connected to the terminal strips.
5. Unscrew and remove the screw with the flat and lock washers that secures the amplifier to the
junction box.
6. Remove the old amplifier.
7. Install the amplifier into the junction box with the screw, lock washer, and flat washer you
removed in Step 5 above. A foam gasket that orients the amplifier and keeps it from rotating is
installed on the bottom of the amplifier. Make sure the amplifier is seated flat in the junction box.
8. Install the detector and controller terminals strips into their sockets on the new amplifier as shown
in Figure 4 on page 11 of this manual. If controller leads or detector leads were removed during
this procedure, refer to Table 4 and Table 5 below.
Table 4:Reconnecting the Amplifier to the Controller
Amplifier Controller
Terminal Strip
Controller
Transmitter Terminal
Strip (typical)
PWR/SIG “-”
- (DC -)
PWR/SIG “S”
S (4 - 20 mA In)
PWR/SIG “+”
+ 24V
Table 5:Reconnecting the LEL Detector to the Amplifier
Amplifier Detector
Terminal Strip
Detector Lead
DETECTOR “R”
RED
DETECTOR “W”
WHT
DETECTOR “G”
GREEN
DETECTOR “B”
BLK
