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INSTRUCTION MANUAL:
ELECTRICAL MANAGEMENT SYSTEM (EMS)
1)
Unplug RV from AC power and be sure generator is off.
2) Determine a location for the EMS control box.
3) Cut the RV power cord about three (3) inches greater than the distance from the
junction box to the desired location of the EMS control box. Then strip back the
outer insulation three (3) inches on input, and three (3) inches on output cable.
See visual references on page 9.
4) Strip back each conductor 3/8" on both stripped ends and attach ring terminals to
green ground wires. If this wire is a solid wire, do not use ring terminals. Loop the
wire around the ground screw.
5) Remove the lid from the EMS. Inside the unit will be a display, cable and pack of
screws. Back off the six set screws from top of contactor (L1, L2, etc.).
6) Take your long cable with the plug end and connect it to the input side by sliding
through the wire restraint on the end of the EMS control box. Next connect the
wires to the contactor by attaching black to L1, white to L2, red to L3, and green
to ground screw on side of box. Torque down set screws and ground nut to
secure connections.
7) Take the short cable coming from the junction box by sliding it through the wire
restraint output side of the EMS control box. Next slide the black wire through the
current sensor containing the green mark and connect to T1, then connect the
white wire to T2. Next slide the red wire through the other sensor and attach to T3.
The current sensor(s) can be oriented in either direction. Attach the green ground
wire to the ground screw on side of box. Make sure the wire colors adjacent
to each other match up. Torque down set screws and ground nut to secure
connections.
8) Double check all connections and make sure they are secure.
9) Remove the two screws on contactor where marked L1, L2, etc. Next remove the
top plastic plate with markings. Examine inside ensuring there are no loose plastic
pieces inside the contactor. If so, remove and re-install cover with two screws. See
visual references on page 9.
!
CAUTION
If you break off a tab and do not remove it, this may stop the contactor
from working and allow 240 volts in the RV.
Visual Photo Library - LCHW50C: page 9 | LCHW30C: page 10
Wiring Diagram - LCHW50C: page 11 | LCHW30C: page 11
For installation, in addition to the EMS Kit, you will need:
• 6 mounting screws
• In some cases you will need a jumper cable, length to be
determined based on the placement of the EMS.
• Always use #10 wire for the LCHW30C & #6 wire for the LCHW50C.
Installation Instructions Before Transfer Box
