131 Eisenhower Lane North
Lombard, IL 60148
630.268.0010 / 1.800.251.2408
P/N 53-00684-200 Rev. A 071301
www.Intellitecsve.com
Intellitec
INSTALLATION & SERVICE MANUAL
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50 AMP Smart Energy Management System Model 900
PRODUCT DESCRIPTION
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The
50 Amp Smart EMS Model 900
consists of two elements: the
Display Panel
and the
Distribution Panel.
The
Display Panel is mounted on a wall or suitable surface, remotely from the distribution panel and convenient to the user.
The Distribution Panel is a completely self-contained 120/240 volt power distribution and energy management system
intended to be used in recreational vehicles. It is housed in a sheet metal enclosure with removable front panel. It
provides circuit protection for all the 120 VAC loads in the RV and a system of energy management to minimize the over-
loading and tripping of circuit breakers.
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Circuit Breakers
- the
50 Amp Smart EMS
Model 900
Distribution Panel offers slots for eight single or dual, standard
120 volt circuit breakers. Two of these breakers, located in the two center stab positions, must be 50 Amp units that act as
a main input protection for each of the lines supplying the remainder of the branch breakers (up to 12).
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Energy Management
- the
50 Amp Smart EMS Model 900
automatically senses the available power to the vehicle. It
determines whether it is connected to a 120 VAC - 30 Amp shore power source, 240 VAC - 50 Amp shore power source, or
Generator source. Depending upon available power, it controls the operation of 6 possible loads that may include: the
front and rear air conditioner fan, and compressor using low voltage switching, and other 120 Volt loads (such as the
refrigerator, water heater, washer/dryer, or other large appliances). These appliances may be any type load, but are
typically heavier loads, those whose use can be "postponed" until a time when current is available for their use.
HOW IT WORKS
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The
50 AMP SMART EMS
Model 900
provides main circuit protection for 120/240 VAC split phase incoming lines and
branch circuit protection for up to 12 circuits, including Energy Management of up to six selected branch circuits. If 120
VAC - 30/20 Amp source is available, the control helps to limit the total current draw of all the appliances in the RV at or
below 30/20 Amps provided by the main power feed. If the Generator source is available, the control helps to limit the
total current draw of all the appliances in the RV at or below the rated current provided by the Generator, which is 45 Amps
for gas-powered generators or 60 Amps for diesel-powered generators (installer selectable).
Circuit Protection:
Circuit protection for ALL the 120 VAC loads is offered by standard, reset-able circuit breakers, provided by the installer.
There are eight positions available for circuit breakers. The breakers located in the two center stab positions must be 50
Amp breakers to act as the main breakers for the entire system. These breakers back-feed power into the circuit breaker
bus to feed power to the branch breakers.The remaining six positions may be occupied by single, or dual units. All the
loads in the RV are fed from the branch breakers.
Energy Management:
Note
- When connected to 50 Amp - 240 VAC Service the Energy Management features of the unit are disabled and the
unit switches all controlled loads"ON".
The main neutral line is routed through the magnetically coupled current sensor, which measures the current flowing
through the neutral line. This is the total amount being drawn by all the 120 volt appliances in the RV when the available
power service is 120 VAC. When this current exceeds the "shore" service rating of 30 Amps (20 Amps if the threshold has
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been set lower) or the generator service rating and 240 VAC service is not available, the
50 AMP SMART EMS
will turn
off the controlled loads in an effort to bring the total current to the limit of the incoming service.
Controlled Loads:
The system offers control of up to six powered loads; each one connected to one of the relay circuits of the
50 AMP Smart
TM
EMS Model 900
system. Four of these relays: relays 1, 2, 3, and 4, are 30 Amp relays with normally-open contacts used
to interrupt the 120 volt power to the loads. These circuits are intended to control 120 volt appliances such as refrigerator,
water heater, washer/dryer, coffee maker, etc.
For the 120 VAC switched loads, power is routed from the individual branch circuit breakers to one of these 120 VAC
relays on the Control Module. The controlled load is then fed from that relay.