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Product description
Compress 7001i/7400i AW AWE – 6721835320 (2021/09)
4
2 Product description
This is an original manual. This manual may not be translated without the
approval of the manufacturer.
Heat pump Compress 7001i/7400i AW is included with the unit AWE in
a series of heating pumps that extract energy from the outdoor air to
provide water-borne heat and hot water. By turning the process over and
taking up heat from the water and placing it in the outdoor air, the plant
can produce cooling if necessary. However, this requires that the heating
system is intended for cooling operation.
The heating system is controlled by a control unit located in the inside
unit. The control unit controls and monitors the system with the help of
various settings for heating, cooling, hot water and other operations. The
monitoring function closes e.g. of the outdoor unit in case of any
malfunctions so that no vital parts are damaged.
2.1 Type plate
Compress 7001i/7400i AW: The type plate is located on the rear of
the heat pump.
AWE : The type plate is located on the inside unit's electrical box
inside the front panel.
The type plate contains information on power, part number, serial
number and date of manufacture.
2.2 Declaration of conformity
The design and operating characteristics of this product comply with the
European and national requirements.
The CE marking declares that the product complies with all the
applicable EU legislation, which is stipulated by attaching this
marking.
The complete text of the Declaration of Conformity is available on the
Internet: worcester-bosch.co.uk.
2.3 Heat pump (outdoor unit)
The heat pump is inverter operated, which means that it will
automatically change the compressor speed to deliver the exact amount
of energy required at the moment. The fan is also RPM controlled and will
change its speed as needed. This provides the lowest possible energy
consumption.
The speed changes have an effect on the sound emissions, as higher
speed results in higher sound emission.
Defrosting
Ice might form on the evaporator during lower outside temperatures. In
case there is enough ice to inhibit the air flow through the evaporator, an
automatic defrosting will start. As soon as the ice is gone, the heat pump
returns to its normal operation.
If the outside temperature is above +5 °C the defrosting will be
performed alongside continued heat production, however if the
temperature is lower, the defrosting is done by ways of a 4-way valve
turning the heat medium direction in the circuit so that the hot gas from
the compressor melts away the ice. The duration of the defrost cycle
depends on the actual outdoor temperature and the amount of frost on
the evaporator.
2.3.1 Operating range of heat pump without auxiliary heater
The heat pump switches off at approx. – 20 °C or +35 °C. The indoor
unit or an external heat source then take over the heating and DHW
heating. The heat pump restarts if the outdoor temperature exceeds
roughly – 17 °C or falls below +32 °C. In cooling mode the heat pump
switches off at roughly +45 °C and restarts at roughly +42 °C.
Fig. 1 Heat pump without auxiliary heater
[1] Maximum flow temperature (T0)
[2] Outdoor temperature (T1)
35
45
50
55
60
-30
T1[°C]
T0[°C]
30
25
20
15
10
-20 0-10 10 20 30 40
1
2
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