11
65-2619RK-CH4-4 M2 Transmitter Operator’s Manual
Wiring the M2 Transmitter
WARNING: Always verify that the power to the M2 is off before you make wiring
connections.
1.
Confirm that no power is being applied to the M2.
2.
Remove the detector junction box’s cover from the junction box.
3.
Remove the M2 junction box’s cover from the junction box.
4.
Grasp the control PCB by its edges.
5.
Gently pull until the control PCB is pulled away from the banana jacks. Take care not
to pull too hard and damage the cable which connects the control and terminal PCBs.
6.
Let the control PCB hang by the cable. The terminal strips are now visible on the
terminal PCB. The control PCB may be left hanging while wiring is done. If desired,
the control PCB may be disconnected from the cable and set aside while wiring.
7.
Guide a four-conductor, shielded cable or four wires in conduit through the top
conduit hub of the detector junction box. To make wiring more convenient, use wire
colors that correspond to the detector wire colors: red, white, green, and black.
NOTE:
Consult RKI Instruments, Inc. for cable lengths longer than 200 feet.
8.
Connect the detector leads to the terminal block in the detector junction box.
9.
Secure the detector junction box’s cover to the junction box.
10. Guide the other end of the four-conductor, shielded cable or four wires in conduit
through the bottom conduit hub of the M2 junction box.
11. To gain access to a plug-in terminal strip for wiring, pull it out of its socket by
grasping the wall between two terminal positions with needle nose pliers and pulling.
Be careful not to exert too much force on the wall to avoid damage to the terminal
strip. The detector terminal strip and the alarm 1 relay terminal strip may be removed
by grasping them with your fingers if the adjacent terminal strips have been removed.
WARNING:
If the M2 is installed in a hazardous location, use appropriately rated
conduit, conduit fittings, and appropriate construction technique that
complies with the local electrical code.
In addition, use appropriately rated conduit, conduit fittings, and
appropriate construction technique to maintain the NEMA 4
environmental rating of the junction box and avoid water entering the
junction box at the conduit hubs.
12. Pull out the detector terminal strip and connect the four wires to the terminal strip as
follows (see Figure 6).
•
Connect the wire corresponding to the detector’s red wire to the LEL “R”
terminal.
•
Connect the wire corresponding to the detector’s white wire to the LEL “W”
terminal.
•
Connect the wire corresponding to the detector’s green wire to the LEL “G”
terminal.
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