77
3.1
COMBUSTION CHAMBER
DIMENSIONS
The combustion chamber is a direct
passage type and is conform to the EN
303-3 standard annex E.
The dimensions are shown in fig. 10.
A n a d e q u a t e p r o t e c t i o n p a n e l i s
mounted on the inside wall of the rear
head of all the models.
3.2
SYSTEM AVAILABLE HEAD
The head available for the heating
plant is shown as a function of the
flow in graph in fig. 11.
4.1
RVA 43.222 UNIT
(optional)
The control panel allows the use of a
RVA 43.222 unit (cod. 8096303) sup-
plied in kit form upon request, com-
plete with mounting instructions (fig.
12).
M a k e t h e e l e c t r i c c o n n e c t i o n a s
shown in point 2.7.
4.3
REPLACING THE SWITCH
VALVE ACTUATOR
To remove the switch valve actuator,
follow these instructions (fig. 13):
–Switch off the power supply.
–Disconnect the Molex connector.
– Push the button (1) while simultane-
ously turning the actuator anticlock-
wise to remove it from the valve body.
– To reassemble the actuator, perform
the same procedure in reverse.
WARNING: In the event of a fault, the
switch val ve can be operat ed in
“intermediate” mode, by pushing the
manual opening valve (2) until it is
locked in position halfway along its
travel. This will keep both outlets,
heating and sanitary, partially open.
3
CHARACTERISTICS
4
USE AND MAINTENANCE
L
270
280
Fig. 10
0
200
1600
1400
1200
1000
800
600
400
PORTATA (l/h)
PREV
ALENZA RESIDU
A (mbar)
500
400
100
200
300
SOL
O - DUETT
O OF/BF
1800
SOLO OF/BF
DUETTO OF/BF - OFi/BFi
2000
Fig. 11
Fig. 12
1
2
A (Risc.)
AB
B (San.)
Fig. 13
A (Heating)
B (D.H.W.)
REMOVE
FLOW RATE (l/h)
RESIDU
AL
HEAD
(mbar)
L
Volume
mm
dm
3
SOLO 20 OF
305
17,5
SOLO 30 OF/BF
405
24,0
SOLO 40 OF/BF
505
30,5
DUETTO 20 OF
305
17,5
DUETTO 30 OF/BF
405
24,0
DUETTO 40 OF/BF
505
30,5
Summary of Contents for DUETTO 20 OF
Page 1: ...Solo Duetto OF BF IT ES PT GB FR BE RO CERTIFICAZIONE DEL SISTEMA DI QUALITA AZIENDALE ...
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