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2.1
PUMP DUTY
Fig. 4 shows the flow-rate available – after allowing for pressure loss through the appliance – for system requirements. When
using this graph, apply only the pressure loss of the system.
Variable speed circulator
The modulating circulator function is active only in the heating function. When switching the three-way to the domestic hot water,
the circulator always works at maximum speed. The modulating circulator function is only applied to the boiler circulator and not
to circulators of any connected external devices (e.g. booster circulator).
In this mode the boiler card determines which flow rate value to adopt according to the instantaneous power delivered by the
boiler. By entering parameter 405 it is possible to change the extent of the modulation:
100 = no modulation
60 = modulation max
85 = default value
700
650
600
550
500
450
400
350
300
250
200
150
100
50
0
0
Key
Location
A
Below an opening (window, air-brick, etc.)
B
Above an opening (window, air-brick, etc.)
C
To the side of an opening (window, air-brick, etc.)
D
Below gutter, drain-pipe, etc.
E
Below eaves
F
Below balcony, lowest point of carport roof, etc.
G
To the side of a soil/drain-pipe, etc.
H
From internal/external corner
I
Above ground, roof, or balcony level
J
From a surface or boundary facing the terminal
K
From a terminal facing a terminal
L
From an opening in the car-port into the building
M
Vertically from a terminal on the same wall
N
Horizontally from a terminal on the same wall
P
From a structure to the side of the vertical terminal
Q
From the top of the vertical terminal to the roof flashing
R
To the side of a boundary
S
To the side of an opening or window on a pitched roof
T
Below an opening or window on a pitched roof
V
From a vertical terminal to an adjacent opening (window, air-brick, etc.)
W
From a vertical terminal to an adjacent vertical terminal
*The possibility that this may be deemed as causing a nuisance, should be considered
100
200
300
400
500
600
flow rate (l/h)
default
700
800
900
1000
1100
1200
300 mm (only if both terminals are the same height)
85
1300
1400
Fig. 3
Fig. 4
Minimum distance
300 mm
300 mm
300 mm
25 mm
25 mm
25 mm
25 mm (60mm for 80/125mm)
25 mm (60mm for 80/125mm)
300 mm
600 mm*
1200 mm
1200 mm
1500 mm
300 mm
300 mm
As determined by the fixed collar
of the vertical terminal
300 mm
600 mm
2000 mm
2000 mm
13
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