98
www.stiebel-eltron.CoM
aIr | watEr HEat pUmp wpl 14 Ht
Function
Heat is extracted from the outside air
at temperatures ranging from +30 °C
to –20 °C by the heat exchanger on
the air side (evaporator). Heating
water is heated to flow temperature
levels in the heat exchanger on
the water side (condenser) by this
extracted heat and additional heat
from the electrical power used by
the compressor. the heat pump
manager (wPM) matches the heat
pump heating output in two stages
to the actual heat demand. At air
temperatures below approx. +10 °C,
the humidity in the air precipitates as
hoarfrost on the evaporator fins. Any
hoarfrost is automatically defrosted.
water created from this defrosting
collects in the defrost pan and is
drained off via a hose. the fan is
switched oFF and the heat pump
circuit is reversed to activate the
defrost cycle. the energy required for
defrosting is drawn from the heating
system. the heat pump automatically
reverts to heating mode at the end of
the defrost cycle.
Appliance description
High temperature air | water heat
pump for internal installation
with integral control unit wPM ii,
circulation pump, patented special
heat pump cylinder, DHw diverter
valve, DCo active, expansion
vessel, safety valve and electric
booster heater for connection to
the heating system. suitable for
mono-energetic or mode-mode
heating operation. two inverter
compressors enable this appliance
to achieve flow temperatures up
to 75 °C in heat pump operation
alone; with the stiebel eltron DHw
cylinder, a DHw temperature >60 °C
can be achieved. the evaporator is
defrosted by reversing the cycle. the
heat pump drive unit is equipped
with two inverter compressors -
one low temperature and one high
temperature - plus condenser,
evaporator and safety equipment,
such as a high/low pressure limiter.
through the electronic expansion
valve, the coefficient of performance
is optimised over the entire
application range, and the heat pump
output is matched via the inverter
compressors to the actual heat
demand of the building to ensure an
optimum operation. the patented
special heat pump cylinder allows
operation without a separate buffer
cylinder. the integral control unit
enables a fully automatic, weather-
compensated heating operation, DHw
heating priority, pasteurisation, a
heat-up program for screed drying
and connections for linking up to a PC
and modem. the heat pump is filled
with HCFC and CFC-free refrigerant
r407C.
A
t a glance
For fully automatic heating
water heating up to +75 °C flow
temperature
suitable for underfloor and
radiator heating systems
extracts energy from the outside
air, right down to -20 °C outside
temperature
Comprises all components
required for its function and
safety
Central control of the heating
system and safety functions
through the heat pump manager
(essential accessory)
Corrosion-protected, external
casing panels made from zinc-
plated sheet steel with stove
enamelled finish; internal airways
made from corrosion-resistant
aluminium sheet
Compact design, therefore modest
space requirement
Contains non-combustible safety
refrigerant r407C
output matching through two
inverter compressors
Содержание Heat pumps
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