Landmark 365 User Manual - page 42
Heartland Owners Forum
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Landmark 365 User Guide V1.1.pdf
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Version 1.1, March 10, 2016
An EMS device will protect you from damage. The two EMS leaders are TRC and Progressive Industries.
They both sell EMS devices that can attach externally at the pedestal, or internally. Cost is about the
same at $350-400. As of this writing, the Progressive unit comes with a lifetime warranty.
EMS devices come in two models. There is a standalone version that plugs into the campground power
receptacle. Your shore power cord then plugs into the EMS receptacle. There is also a version that can
be wired in-line inside your coach. It can be placed either before or after the transfer switch. If it’s
placed after the transfer switch, the EMS will protect against external faults, and against internal faults
up to and including a transfer switch fault.
Power Control System
The Power Control System automatically manages your electrical usage to fit within the amount of
power available to the coach. Loads are shed as necessary to keep from tripping the inside main
breakers, or the outside pedestal circuit breaker.
Description of Operation
The Controller measures the power across the two power legs coming into the circuit breaker panel (L1
and L2).
If it detects a voltage differential across L1 and L2, it interprets that as 50 amp service. If it does not
detect a voltage differential, the system will assume that both legs are being supplied by a single source.
In that case, the system defaults to a 30 amp setting. If plugged into a 20 amp circuit, you must set the
controller to 20 amps manually. If you don’t set it to 20 amps, the controller will operate as though the
power source was 30 amps and you may experience power issues.
The system will automatically detect when the generator is running by way of connection to the
generator hours meter.