Technical data

18
Refrigerants
The Greenstar Plus Hybrid is filled with R410A refrigerant.
Only qualified and authorised refrigeration engineers
may work on the refrigerant circuit. For all work with
refrigerant, wear suitable safety gloves and goggles.
Maintenance of the external heat pump
The external unit should be checked regularly for leaves
and debris, especially on the evaporation fins and water
tray. To prevent damage these must only be cleaned using a
watering can with a rose attachment and a soft cloth.
Maintenance on the indoor unit and boiler
These should be serviced annually. If a cylinder is fitted
this would have to be serviced annually in accordance
with G3 Building Regulations.
Heat emitters
•
It is important that a Hybrid system is installed on
a system with the appropriate heat emitters for the
combination of a heat pump and boiler
•
It is recommended a pre-design assessment is carried out
to determine the suitability of the system and heat loss
calculations for the property are carried out to determine
the system design requirements
•
If under floor heating is installed the system should be
correctly sized to work at lower temperatures.
Designated use
The appliance may only be installed in sealed central
heating systems to BS EN 12828. Any other use is
considered improper. Any damage that may result is
excluded from liability. The commercial and industrial use of
the appliance for generating process heat is not permitted.
•
Use the appliance exclusively for the stated purpose
whilst adhering to the specification and environmental
conditions
•
The following gas condensing boilers can be used with
the Hybrid system:
– Greenstar 29, 34, 38 and 42 CDi Classic combi
– Greenstar 25 and 30Si combi
– Greenstar Highflow 440CDi and 550CDi combi
– Greenstar 28, 32 and 36CDi Compact combi
– Greenstar 30CDi Classic System
– Greenstar 12, 15, 18 and 24i System
•
Operate the appliance exclusively with R410A refrigerant.
•
Take into account the data on the system component
data plates.
•
Maximum output of the system is 25kW at ∆T of 20K.
Correct use includes adherence to maintenance and
inspection intervals.
The Hybrid system must not be used for purposes other
than those specified. Worcester accepts no liability for
losses arising from improper, incorrect or unreasonable use.
General information on energy use and heat production
Buildings can be heated efficiently with condensing
boilers and air to water heat pumps. However, these two
technologies have different performance characteristics.
Condensing boilers as well as air to water heat pumps use
energy gained from fossil fuels. In condensing boilers, gas is
burnt directly inside the appliance.
Heat pumps use electrical energy which has been obtained
from a number of different sources. This includes fossil
fuel burning power stations. These are typically around 40
% efficient in converting fuel to useful electricity. Although
an air to water heat pump is far more efficient than a
condensing boiler at converting its input energy (electricity)
into heat, the electricity used has a larger amount of fossil
fuel consumption attached. This consumption of fossil fuels
is referred to as the primary energy factor (PEF).
Installation and maintenance