Progressive Industries, Inc.
EMS
Electrical Management System
Complete Installation Guide
and
Operating Instructions for:
Model EMS-HW50C
Rated at 240V/50A
Manufactured by:
Progressive Industries, Inc.
414B Airport Boulevard
Morrisville, NC 27560
(919) 462-8280
www.progressiveindustries.net
Proudly manufactured i n t he U.S.A.
Features
High/Low Voltage Protection
Whenever AC power falls below 104 volts, or rises above 132 volts, the EMS automatically shuts
down power to the RV. The EMS will monitor the power and once the AC power rises above 104
volts, or drops below the 132 volt level, the time delay indicator flashes for the preset time and
then automatically restores power to the RV.
Time Delay for A/C Compressor
If AC power is interrupted, or the EMS detects a fault condition, the built in time delay is
activated. There are two settings on the EMS: one is 136 seconds (02:16), and the other is 15
seconds. Consult your air conditioner manual to see if it has a time delay built in. If so, use the
15 second delay, if not; use the 136-second delay. The factory setting is 15 seconds.
5 Mode Surge Protection
This feature provides full surge protection L-N, L-N, L-G, L-L and N-G. Total Joule rating is
3,580 and 88,000A surge current. Response time of <1 nano second.
Surge Indicator
In the event of a power surge and the surge protector circuit is damaged within the EMS, L-N or
L-G, the digital display error code will read E-10. This indicates that the EMS needs to be
serviced.
Reverse Polarity Pr ot ection
If AC power is a reverse polarity condition, the EMS will not allow power to the RV and the
error code will read E1.
Open Neutral Protectio n
If AC power has an open neutral condition, the display will not light, and the EMS will not allow
power to the RV.
Open Ground Protection
If AC power has an open ground condition, the EMS will read an error code of E2, and power
will not be allowed to the RV.
AC Frequency Protection
If AC power frequency deviates plus/minus 9 hertz from 60 cycles per second, the EMS will shut
down AC power. An Error Code of E7 will be displayed when the frequency is high; and an
Error Code of E8 will be displayed when frequency is low.
Accidental 240V Protection
If 240 volts is detected when plugging into AC power, the EMS will NOT allow power to the
RV. If this condition occurs while power is applied to the RV, the EMS shuts off power
instantly. The display will read the voltage and E-3 for the error. (NEVER BYPASS THE EMS
WHEN THIS OCCURS.)
Remote Display
Continuously scrolls the AC power information, including voltage, current, frequency,
error codes and previous errors. Each reading is displayed for two (2) seconds.
Previous Error Code
This feature tells the user what the previous error was and why power was interrupted to the RV.
To read a Previous Error Code, put a “P” in front of the “E” code. This is only displayed if an
actual error occurs. The error is deleted when the power is disconnected from the EMS. .
Bypass
This switch is located on the remote panel, and allows the user to bypass the computer circuit in
the EMS in the event of computer failure, this allowing AC power into the RV. This does not
disable the surge protection portion of the EMS; however, all other features are disabled.
Modular Design
Replacement parts are designed for simple plug and play, making repairs extremely user friendly.
Microprocessor Controlled
The computer and remote display are driven by state of the art microprocessors that are
programmed with software to drive the entire EMS unit.
Warnings
• Do not exceed the rating on the EMS for any reason, however,
these devices are designed to be reduced down to 120V/15A, and
still maintain full protection.
• Do not modify the EMS in any way. This will void the
warranty, compromise protection and could result in possible
shock and/or fire hazard.
• It is important to always check the pedestal power outlet for
charring; this condition means that the AC receptacle is
providing a weak connection. DO NOT USE! It could result in
possible melting of the RV power plug.
• Progressive Industries recommends you have a certified
electrician or an authorized dealer perform the installation of the
EMS.
• When running extension cords from the RV to AC power,
always use a 6 gauge cable for your 240 Volt, 50 Amp system.
Make sure that the cable is rated for outdoor use to reduce the
risk of electrical shock. Small gauge cable will have a higher
resistance and will result in voltage loss, plus it may result in an
electrical fire.
• Whenever servicing or installing the EMS, or any other AC
powered device, make sure AC power is disconnected.
• RV wiring is different than the wiring found in homes; the
neutral and ground conductors are isolated in the RV, unlike in a
home where they are tied together at the service panel. The
reason is: homes have a bonded ground system, whereas RV’s
do not. Therefore, never bond the neutral and ground together
for any reason. This will create a ground fault condition, and
may result in electric shock and/or fire hazard.
• Never solder the ends of the wires that you attach during
installation. This includes the Red, Black and White wires.
• Never plug the EMS into an inverter.
Installation Instructions Before Transfer Box Model EMS-HW50C
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 #6 wire.
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
Picture A)
4. Strip back each conductor 3/8 inch on both stripped ends, (See
Picture A) and attach ring terminals to green ground wires. If
this wire is solid wire, do not use ring terminals. Loop the wire
around the ground screw.
5. Remove the lid from the EMS. Next, remove the display, cable
and pack of screws and then 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. Then 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. (See Picture B) 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 tape and connect to T1, then connect the white wire to
T2. Now slide the red wire through the other current sensor and
attach to T3. The arrow that is on the sensor needs to face T1
and T3 and the green ground wire to the ground screw on side of
box. (See Picture B) Make sure that the wire colors match up
across from each other. 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.
Loading...