Riello Start Aqua Condens 25/60 BIS, Installer And User Manual

Page: 27 / 76

ENGLISH
27
In this case, the combustion air is picked up from the boiler
installation room (which must be a suitable technical room with
proper ventilation).
The non insulated flue gas outlet pipes are potential sources of
danger.
Make sure the flue gas discharge pipe is tilted 3° towards the
boiler.
maximum length of the flue gas
discharge pipe ø 80mm
pressure drop
45° curve 90° curve
60 m 1 m 1,5m
"Straight length" means without bends, drainage terminals or
joints.
“AIRTIGHT” INSTALLATION (TYPE C)
The boiler must be connected to concentric or twin flue gas discharge
pipes and air suction pipes, both leading outdoors. The boiler must
not be operated without them.
Concentric pipes (ø 60-100mm)
The concentric pipes can be fitted in most suitable direction in rela-
tion to installation requirements.
It is compulsory to use specific pipes (see Riello catalogue).
Make sure the flue gas discharge pipe is tilted 3° towards the
boiler.
Non-insulated outlet pipes are potential sources of danger.
The boiler automatically adapts ventilation according to the
type of installation and the length of the duct. Do not obstruct
or choke the combustion air suction pipe in any way.
HORIZONTAL
straight length of concentric
pipe Ø 60-100 mm
pressure drop
45° curve 90° curve
7,85 m 1,3m 1,6m
VERTICAL
straight length of concentric
pipe Ø 60-100 mm
pressure drop
45° curve 90° curve
8,85 m 1,3m 1,6m
For installation, follow the instructions supplied with the specific ac-
cessory kit for condensing boilers.
Straight length means without bends, drainage terminals or
joints.
The use of a longer pipe causes a loss of output of the boiler.
Concentric pipes (ø 80-125)
The appropriate adaptor kit must be installed for this configuration.
The concentric pipes can be fitted in most suitable direction in rela-
tion to installation requirements. For installation, follow the instruc-
tions supplied with the specific kit for condensing boilers.
straight length of concentric
pipe Ø 80-125 mm
pressure drop
45° curve 90° curve
14,85 m 1 m 1,5m
"Straight length" means without bends, drainage terminals or
joints.
Twin pipes (ø 80mm)
The twin pipes can face in the direction most suited to the installation
requirements.
The suction pipe of the combustion air must be connected to the
input after removing the cap fixed with three screws.
The flue gases discharge pipe must be connected to the flue gases
outlet.
For installation, follow the instructions supplied with the specific ac-
cessory kit for condensing boilers.
straight length of twin pipes ø 80mm
pressure drop
45° curve 90° curve
36+36 m 1 m 1,5m
"Straight length" means without bends, drainage terminals or
joints.
The use of a longer pipe causes a loss of output of the boiler.
It is compulsory to use specific pipes (see Riello catalogue).
Make sure the flue gas discharge pipe is tilted 3° towards the
boiler.
The boiler automatically adapts the purging to the type of in-
stallation and the length of the pipes. Do not obstruct or choke
the pipes in any way.
For the indication of the maximum lengths of the single pipe,
refer to the charts.
POSSIBLE OUTLET CONFIGURATIONS (fig. 21)
B23P-B53P
Suction in room, with external outlet
C13-C13x
Concentric wall outlet. The pipes may also be split,
but the outputs must be concentric or sufficiently
close together to be subjected to similar wind condi-
tions (within 50cm)
C33-C33x
Concentric roof outlet. Outlets as for C13
C43 C43x
Discharge and suction in separate shared smoke
pipes subject to similar wind conditions
C53-C53x
Separated discharge and suction on wall or roof, in
areas with different pressure levels
C83 C83x
Outlet in single or shared smoke pipe and wall suc-
tion line.
C93-C93x
Discharge on roof (similar to C33) and air suction
via a single existing smoke pipe.
Refer to the regulations in force.
3.14 System loading and emptying (fig. 22-23)
LOADING
Once the hydraulic connections have been carried out, fill the sys-
tem.
This operation must be carried out with a cold system, following
these instructions:
Domestic hot water system:
- open the cold water inlet tap to fill the storage tank
- to check that the storage tank is full, open a hot water tap and wait
for the water to exit.
Heating system:
- make sure that the system discharge valve (
B
) is closed
- open the plug of the automatic bleed valves (
C
and
E
) by two or
three turns
- open the filling tap (
G
) until the pressure indicated by the water
pressure gauge is 1,5 bar.
- open the manual bleed valve (
D
) with a CH11 wrench and close
it once the bleeding procedure is completed; If necessary, repeat
this operation until no more air exits the valve (
D
)
- once the filling operation of the system is finished, close the filler
valve
G
- Each time the boiler is electrically powered, it begins an automatic
venting cycle that lasts about 2 minutes. The symbol “ ” is
displayed during this phase
NOTE:
the venting of the boiler takes place automatically via the two
automatic bleed valves
C
and
E
.
NOTE:
the first system filling operation must be done by means of
tap
G
.