Technical data

19
The PEF of electricity is generally 2.3, the PEF of oil
and gas is 1.1, the PEF of mixed electric power is 2.6.
The Coefficient of Performance (CoP) of the heat pump
is, subject to outside air temperature and water flow
temperature, between 2 and 5.5.
Depending on the current situation and heat demand, either
the condensing boiler or the air to water heat pump may
offer a more favourable energy-to-cost ratio.
The Hybrid package integrates both technologies in one
system and thereby offers the opportunity to use either
heat source optimally at any time. Users can decide for
themselves whether the emphasis should be on CO
2
emissions or whether costs take priority, alternatively,
a combination of CO
2
and costs can be used.
Expansion vessel
An additional expansion vessel must be installed on the
heating system return between the bypass valve and the
Hybrid Manager. Size the expansion vessel according to
BS EN 1282
Installation site in general
•
Installation must be in line with MCS MIS 3005 and
planning guide MCS 020
•
Select an installation site (floor standing or wall
mounting) where the heat pump creates no noise
nuisance for other occupants or the neighbourhood
•
Select an installation site where wiring and pipe work
to power source and Hybrid Manager can be easily
accomplished
•
The heat pump produces condensation during the heating
operation. Ensure suitable drainage is provided around
the heat pump if such condensation is likely to cause risk
of injury or damage
•
It is important that flue products or condensate do
not drip onto or enter the air intake of the heat pump.
Therefore, never locate the heat pump in immediate
proximity or directly below the boiler flue outlet.
•
Recirculation of the discharge air can severely affect
the output
•
We recommend a floor standing installation
where possible
Windy location
If the heat pump is sited on a roof or other exposed site,
ensure that the air discharge is not directly exposed to
strong wind.
Possible preventive measures to safeguard against
strong wind:
•
Direct the air discharge towards the nearest wall. The
minimum clearance must be 1,000mm.
Control strategy: CO
2
optimised
The CO
2
-optimised mode (factory setting) uses fuel factors
to determine when the heat pump or boiler is to be
operated to achieve the greatest CO
2
reduction.
The fuel factors for fossil fuel and electricity must be
set. The fuel factor indicates the fossil-fuel consumption
incurred until the energy (electricity/gas) is available at
the corresponding heat appliance. A heat pump uses the
input energy more efficiently than a boiler. However, the
electricity used generally involves a larger amount of
fossil-fuel consumption. The following statement applies
to both fuel factors: the lower the values, the better this is
for the environment.
Examples:
Electricity from a gas-fired power station that runs at 45%
efficiency has a fuel factor of:
•
1/45 % = 1/(45/100) = 1/0.45 = 2.2
Natural gas, which is supplied with a loss of 12%
(88% efficiency), has an fuel factor of:
•
1/88 % = 1/(88/100) = 1/0.88 = 1.1
The actual fuel factor for the available energy (electricity/
gas) must be checked with the energy supplier.