Product Brochure

How the Accelera
®
heat pump works
An Accelera
®
works like an air conditioner, but instead
of transferring the heat to the outdoors, it transfers heat
into the tank of water. This process is many times more
efficient than any other type of water heater. It works
like this:
 The fan moves room air through the evaporator,
which contains liquid refrigerant that extracts
heat from the ambient air as it evaporates. As the
refrigerant warms, it changes into a gas.
 The warm gaseous refrigerant passes through
the compressor which increases its pressure. As
the pressure increases, the temperature of the
refrigerant rises until it becomes hot.
 The hot refrigerant then passes through the
condenser wrapped around the water tank.
Because heat travels from hot to cold, the heat in
the refrigerant transfers to the water in the tank.
 The refrigerant, having transferred its heat to the
water is now a super-cool liquid. It then passes
through the expansion valve to become a warmer,
yet still cold, liquid, ready to become a gas again in
the evaporator and continue the cycle.
Accelera
®
heat pump water heaters use
environmentally-friendly R134a for refrigerant.
Hot, gaseous
state refrigerant
Super-cooled
liquid state
refrigerant
Cold, liquid
state refrigerant
Expansion
Valve
Warmer, gaseous
state refrigerant
Evaporator
Compressor
Condenser
Cold
Water
Inlet
Hot
Water
Outlet
Ambient Air
Provides Energy
Colder
Dehumidified
Air
Engineered in Germany, Stiebel
Eltron heat pump water heaters
have been the largest seller in
Europe for over 35 years.
Accelera
®
220 E
Accelera
®
300 E
Household size
recommendation
Annual
Savings*
Accelera
®
220 E
$
250 –
$
490
2-3 people (possibly 4)
Accelera
®
300 E
$
370 –
$
740
3-5 people (possibly 6)
*based on Energy Star savings for heat pump water heaters