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67
ELECTRICAL
SUBPANEL
The subpanel is a smaller 120 Volt breaker
box containing the breakers for the circuits
which the inverter is wired to power. It is
typically located near the main breaker
box unless the coach is equipped with an
Energy Management System (EMS). In this
case, the subpanel is often located within
the EMS panel. The subpanel is installed to
limit the AC power use to specific circuits
when the electricity is supplied by the inverter. Some
inverters may be used to power a specific circuit. In this
case, a subpanel is not used.
The subpanel is installed to limit the AC power use to
specific circuits when the electricity is supplied by the
inverter. Some inverters may be used to power a specific
circuit. In this case, a subpanel is not used.
AUTOMATIC GENERATOR START (AGS)
On coaches equipped with
AGS, the generator will start
and provide 120 Volt power
if the incoming shore power
voltage is not present and
startup parameters are met.
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.
Automatic transfer switches are
logic-controlled to convert under a
given set of conditions. The transfer
switches used in RVs are typically
generator priority switches which
connect to shore power under
normal use. As soon as the transfer
switch detects the presence of
120 Volt power on the generator
input lines, it will switch over to the
generator’s inputs and drop the
connection to shore power.
Transfer switches are designed
so that only one input can be
connected at a time in order
to prevent any back feeding of
electrical power. In addition, RV
transfer switches generally have a
built-in delay allowing the generator
to warm up and speed up before
actually switching the load. This
prevents stalling or stumbling while
the engine is still cold and not producing full power.
MAIN SERVICE PANEL BREAKER BOX
The main service panel
or 120 Volt breaker
box is typically located
inside a bathroom,
bedroom, or front
overhead cabinet
depending on the
coach model and floor
plan. The breaker box
contains the main 50
Amp (or 30 Amp if
equipped) breaker and the individual breakers protecting
each circuit from overload conditions. Any unit equipped
with two air conditioners or more must have 50 Amp
service. The task of the breaker is to “trip” if the current
exceeds the amperage rating on the breaker to prevent
damage to the wiring of the circuit.
The breakers are resettable by simply flipping the
breaker to the ‘o
ff
’ position, and then back to the ‘on’
position once the overload condition is removed. All 120
Volt circuit breakers are located in the main service panel
unless the coach is equipped with an inverter/charger.
These units are also equipped with a subpanel.
Breakers positioned next to each other are on
di
ff
erent poles in a 50 Amp panel. If only part of the
electrical circuits are working, you may have a poor
connection at shore power. In this instance, power is
most likely only being provided to one pole or leg.
IMPORTANT
!
This function must be
enabled in order for the
AGS to function properly.
IMPORTANT
!
50 AMP ENERGY MANAGEMENT
SYSTEM (EMS)
The 50 Amp Precision Circuits Energy Management
System is currently o
ff
ered 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.
Summary of Contents for London Aire 2021
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