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12 - FACTORY OPTIONS AND ACCESSORIES
Connections at the fl ue
Important: The fl ue of the gas burner is not supplied with
the unit. Its design and installation is the responsibility of
the installer and must comply with all the directives and
regulations in force in the installation location.
Fumes
exhaust:
80mm
inner ∅
Condensate
drain
1/2"M PVC
This PCH burner module is fi tted with a watertight combustion circuit
and with the burner fan located upstream of the heat exchanger.
Connection to the fl ue, according to how the heater is installed,
can be made as "C" type, with combustion air being drawn from
outside, or as "B" type with combustion air being drawn from the
heater installation site. If the heater is installed outdoor, a "B" type
installation is also a "C" type.
More specifi cally, the heater is certifi ed for the following exhausts:
B23P-C13-C33-C43-C53-C63; for more information on the fl ue
types, please refer to current regulations.
To fi t the fume exhausts, certifi ed pipes and terminals must be
used, taking into account that the modules are of a condensing
type; the following material must be used:
- aluminium with a thickness of at least 1.5 mm;
- stainless steel with a thickness of at least 0.6 mm; the steel
must have a carbon content of at least 0,2 %.
Use sealed pipe to prevent condensation from leaking from the
pipes; the seal must be adequate to withstand a fume temperature
ranging between 25°C and 120°C.
The fl ue does not need to be insulated to prevent the build-up of
water in the pipes, as this does is not detrimental to the heater,
which is fi tted with a water trap. Insulate the pipe if required to
protect the fl ue from accidental contact.
For the air intake, use:
- aluminium with a thickness of at least 1.0 mm;
- stainless steel with a thickness of at least 0.4 mm.
Important: The horizontal sections of fl ue, which make up the
fume exhaust, must be installed with a slightly incline (1°- 3°)
towards the heater, in order to prevent the build of condensation
in the exhaust.
■ Terminal confi guration
Type B23P
Open combustion circuit: the gases produced by the combustion
are discharged outside, on a wall or on the roof, and the combustion
air is directly drawn from the site where the equipment is installed.
In this case, the standards UNI-CIG 7129 and UNI-CIG 7131
require the provision of suitable vents on the walls.
Note: It is compulsory to fi t an IP20 safety mesh to prevent solids
with a diameter higher than 12mm from entering the combustion
air intake; at the same time, the mesh opening must not be lager
than 8mm.
Type C13
Sealed combustion circuit (type "C") connected to a horizontal
terminal on the wall by means of its own ducting.
Type C33
Sealed combustion circuit (type "C") connected to a vertically
installed terminal (on the roof) by means of its own ducting.
58
Type C53
Sealed combustion circuit (type "C") connected by means of its
own ducting split in two terminals which could end up in areas with
diff erent pressure (such as a ducting connected to the roof and a
second one connected to the wall).
Type C63
Sealed combustion circuit (type "C") connected to an approved and
separately sold combustion air supply and combustion products
exhaust system.
■ Selection Guide
If the terminal is not directly connected to the heater and, therefore,
extra routing is required, according to the length of the ducting,
the diameter of the selected terminals, extensions and bends
must be checked.
After establishing the routing, the pressure drop must be calculated
for each component; each component has a diff erent pressure
drop value as the glue gases fl ow rate is diff erent.
The pressure drops of each component identifi ed must be added,
checking that the result is no higher than the value available for
the PCH heater module used; if a combustion air supply pipe is
fi tted, the pressure losses must be added to the fume exhaust
pressure drop.
If the sum of pressure drops caused by the fi ttings are higher than
the pressure available at the exhaust, ducting with higher diameter
must be used, rechecking the calculation; a pressure drop higher
than the pressure available at the fume exhaust reduces the heater
module thermal output.
If the duct routing requires the use of bends, the length required
must be subtracted from the available length:
- Ø 80 wide radius bend at 90° EqL = 2.1m
- Ø 80 wide radius bend at 45° EqL = 1.1m
- Ø 100 wide radius bend at 90° EqL = 3.5m
- Ø 100 wide radius bend at 45° EqL = 1.6m
Pressure drop for terminals and exhaust ducting:
PCH model
Pressure available at the exhaust (Pa) 80
Component
Ø 80 pipe (1 metre)
Ø 100 pipe (1 metre)
Ø 80 wide radius bend at 90°
Ø 100 wide radius bend at 90°
Ø 80 wide radius bend at 45°
Ø 100 wide radius bend at 45°
Ø 80 - 100 adaptor
Ø 80 hooded terminal
Ø 100 hooded terminal
Burner condensate drain
These units are equipped with a junction for draining the burner
condensates drain pan. Threaded connector 1/2" M in PVC.
To facilitate drainage, the structure of the group of generator pipes
slopes slightly towards the discharge.
If the unit is going to be installed outdoors in a location where
there are never low temperatures, the drain junction does not
have to be connected to any pipe. It must simply be ensured that
the water does not stagnate.
If the condensates are going to be discharged into a pipe do not
seal it directly at the condensate outlet. If the water were to freeze
in the pipe this could block the discharge of condensates and cause
the water to accumulate inside the exchanger.
020 034 045 065 080 105
90
100 120 120 120
Pressure drop (Pa)
0,4
1,3
2,1
4,6
7,3 11,0
0,1
0,4
0,6
1,3
2,2
3,5
0,9
2,8
4,4
9,5 15,0 22,2
0,3
1,4
2,2
5,1
8,2 12,0
0,5
1,4
2,2
4,6
7,3 11,0
0,2
0,6
1,0
2,2
3,5
5,5
0,2
0,6
1,0
1,2
1,8
2,7
2,0
5,0 10,0 14,0 16,0 20,0
1,5
3,7
7,5 10,5 12,0 15,0
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