Page 10
Sizing example 1
Design
temperature
The property is in Manchester,
England
–
NHBC recommend -
3
C and CIBSE recommend -
2.2
C. The design temperature is
therefore -3
C.
Building
heat loss
The properties heat loss is
calculated to be 4.5kW at the
design temperature.
Flow
temperature
Has been selected at 55
C as
radiators are going to be
installed.
The heat pump is dimensioned on the heat consumption
of the building at the design temperature as shown in
green in
Figure
1
.
Step 1: The building's heat loss is plotted based upon the
0kW @ 21
C
and the building‟s calculated heat loss at the
design temperature i.e. 4.5kW @ -3
C as shown by the
green line.
Step 2: At the point where the green line crosses the
performance line of the heat pump the blue line can be
drawn to show the external temperature that the heat
pump will be able to match the heat load of the property
which in
Figure 1
is -9
C.
Step 3: Below external temperatures of -9
C the property
will require additional heat. The factory fitted 3kW inline
flow boiler in addition to the 6kW heat pump to gives 9kW
which will support the properties heat load down to the
operating limit of the heat pump which is -20
C.
Figure 1: Example heat output curves to EN14511
for the LA 6 MI for a heat loss of 4.5kW at a design
temperature of -3
C.
Sizing example 2
Design
temperature
The property is in Birmingham,
England
–
NHBC recommend
3
C and MIS 3005 recommend -
3.4
C. The design temperature is
therefore -3.4
C.
Building
heat loss
The properties heat loss is
calculated to be 5kW at the
design temperature.
Flow
temperature
Has been selected at 35
C as
under floor heating is going to be
used.
The heat pump is dimensioned on the heat consumption
of the building at the design temperature as shown in
green in
Figure 2
.
Step 1: The building's heat loss is plotted based upon the
0kW @ 21
C and the building‟s calcu
lated heat loss at the
design temperature i.e. 5kW @ -3.4
C as shown by the
green line.
Step 2: At the point where the green line crosses the
performance line of the heat pump the blue line can be
drawn to show the external temperature that the heat
pump will be able to match the heat load of the property
which is also 5.9kW at
–
8
C.
Step 3: Below external temperatures of -8
C the property
will require additional heat. The factory fitted 3kW inline
flow boiler in addition to the 6kW heat pump to gives 9kW
which will support the properties heat load down to the
operating limit of the heat pump which is -20
C.
Figure 2: Example heat output curves for the LA 6 M for a
heat loss of 5.0kW at a design temperature of -1.8C and a the
building heat loading being met down to -15C.
Summary of Contents for LA 12 MI
Page 35: ...Page 34 Package 1 and 2 Plumbing Schematic...
Page 36: ......
Page 40: ...Page 39 CE declaration of conformity...
Page 41: ...Page 40 LA 6 MI performance...
Page 42: ...Page 41 LA 6 MI continued...
Page 43: ...Page 42 LA 9 MI performance...
Page 44: ...Page 43 LA 9 MI performance continued...
Page 45: ...Page 44 LA 12 MI performance...
Page 46: ...Page 45 LA 12 MI performance continued...
Page 47: ...Page 46 LA 16 MI performance...
Page 48: ...Page 47 LA 16 MI performance continued...
Page 49: ...Page 48 Product Dimensions LA 6 MI and LA 9 MI...
Page 50: ...Page 49 Product Dimensions LA 12 MI and LA 16 MI...
Page 61: ...Page 60 Information for DHW cylinder with buffer ECS125HP 580...
Page 62: ...Page 61 Information for DHW cylinder with buffer ECS150HP 75 580...
Page 63: ...Page 62 Information for DHW cylinder with buffer ECS210HP 75 580...
