65-2451RK Hydrogen Transmitter • 11
8.
Connect the detector leads to the detector terminal strip as shown in Table 3 below
and Figure 3 on page 6 of this manual.
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 13 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 3 on page 6 of this manual. If controller leads or detector
leads were removed during this procedure, refer to Table 4 and Table 5 below.
Table 3:Reconnecting the Hydrogen
Detector to the Amplifier
Detector Lead
Detector Terminal Strip
Red
LEL “R”
White
LEL “W”
Green
LEL “G”
Black
LEL “B”
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
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