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!WARNING!
Risk of Electrical Shock. Disconnect or isolate all power supplies before making electrical
connections. More than one disconnection or isolation may be required to completely
de-energize equipment. Contact with components carrying hazardous voltage can cause
electric shock and may result in severe personal injury or death.
!IMPORTANT!
All wiring must conform to local, national, and regional regulations. Use copper conductors
only for all wire connections. Do not exceed the electrical ratings for the EM-15 / EM-20 or the
equipment connected to it.
!CAUTION!
is product should be installed by an experienced technician. CAUTION and care must be
taken when servicing this equipment. To prevent severe shock or electrocution, consult your
servicing dealer.
!WARNING!
is unit employs components that can produce arcs or sparks. To prevent re or explosion, do
not install in compartments containing batteries or ammable materials (LP gas). is product
is NOT ignition protected.
EM-15 / EM-20 OPERATION
Introduction
e EM-15 / EM-20 is a cost-ecient, energy management branch circuit expander. is
product is designed to share the power from a single branch circuit between two mid-to-large
power loads that normally require their own breaker. Potential applications include microwaves,
replaces, hairdryers, water heaters, or even two air conditioners. RVs with two or more air
conditioners frequently require 50A AC service; however, the EM-20 can be employed to
manage two air conditioners in an RV with 30A service.
All WFCO products are designed to better meet the needs of RV owners while also making
the job simpler for the installer. e EM-20 oers three exible mounting options, as well as, a
number of unique features – like four basic power modes and a remote panel for manual energy
management – making it easy for RV owners to assign energy to the circuit they need at any
particular time. e EM-15 also oers three exible mounting options, and can quickly be
utilized wherever there is a need for energy management on a 15A branch circuit.
Product Description
e EM-15 / EM-20 is an Energy Management Switch designed to be used in recreational
vehicles to share the power from a single 15A / 20A branch circuit between two mid- to large-
loads. e device applies power to both loads until the total loaded current exceeds
approximately 13.5A / 18A. It then cuts the power to the secondary load to prevent the 15A /
20A circuit breaker from tripping while maintaining the primary load. e secondary load will
be restored automatically when the total loaded current drops below a preset level (~5A).
e EM-15 / EM-20 default primary (priority) branch is Circuit A. e secondary load (which
may be shut o) shall be wired to Circuit B.
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