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48
ELECTRICAL
50 AMP ENERGY MANAGEMENT
SYSTEM (EMS)
The 50 Amp Precision Circuits Energy Management
System is currently offered as standard or optional
equipment on all coaches not equipped with a SilverLeaf
Coach Management System. Its function is to provide
power management for certain 120 Volt loads and
as a system of energy management to minimize the
overloading and tripping of circuit breakers. The EMS
contains a main distribution panel with a self-contained
control module and a remote display panel, which is
typically located in the dash overhead electrical control
cabinet.
The AGS may be controlled via the ME-AGS or SilverLeaf.
ME-PT2 can be used in conjunction with the Dometic
Duo-Therm kit and Comfort Control Center (CCC II
Thermostat) or KIB L-Panel to connect the t-stat output of
the A/C directly to the AGS. This allows the AGS to start
on demand from the A/C for either heat (heat pump only)
or cool.
1. Follow Comfort Control Center or KIB L-Panel
instructions for proper zones, heat, cool and AGS
settings.
2. The ME-AGS-S will now start on demand from the
Comfort Control Center or KIB L-Panel.
For more information about AGS operation via the
SilverLeaf system, refer the year/model-specific
SilverLeaf Touchscreen Guide in Newgle.
This function must be enabled in order for the AGS
to function properly.
IMPORTANT
!
The EMS control module automatically senses the
available power being supplied to the coach. The module
determines whether it is connected to a 50 Amp (240
Volt) or the generator. On 120 Volt service, it is unable
to determine if the source is providing 30, 20 or 15 Amp
shore power. Depending on available power, it can
control up to seven loads.
The EMS controls air conditioner loads using low-voltage
switching and other 120 Volt, heavy-load appliances,
such as block heaters, water heating elements, and air
conditioners. The EMS will also control the 2012 Magnum
inverter charge rate or switch to invert depending on the
charging status. The charger will only reduce once it is in
float status.
The current-sensing relay will display the amperage on
each leg. The EMS will start shedding loads and look at
the AC current when it sheds a load, determining when it
has enough current available to turn on the load again.
When the EMS sheds a load, it only looks at one leg to
see how much of a load was shed. For coaches equipped
with the SilverLeaf system, refer to the SilverLeaf
Functional Guide for more information on your EMS.
CONVERTERS
All Newmar coaches are equipped with a converter or
an inverter/converter combination. Converters are used
to transform alternating current power (120 Volt AC) to
direct current power (12 Volt DC). Converters supply the
coach with 12 Volt power to operate systems in the coach
and provide battery charging.
Newmar currently uses three sizes of converters: 45,
60, and 80 Amp models. Previous units may have a 55
or 75 Amp converter or two 45 Amp converters with a
total of 90 Amps available. When replacing a converter,
it is necessary to use the same size converter to ensure
sufficient wiring and breakers for the converter’s input
and output ratings.
Possible causes of converter failure:
•
Overheating caused by cooling fan malfunction
or inadequate ventilation causing damage to the
converter
•
Blown fuses
INVERTERS
An inverter changes 12 Volt DC power to 120 Volt AC
power. Coaches with an inverter only typically use it for
powering the entertainment equipment like the TV, DVD,
and Blu-ray players. The inverters used for this purpose
are usually 600 watt to 1000 watt (1000 Watt inverters
may also power a small refrigerator) and do not have
battery charging capability.
Summary of Contents for Kountry Star 2022
Page 1: ...SM 2022...
