Royal CPR 28T Installation, User And Maintenance Manual page 39

Leave enough clearance for maintenance work.
materials (x) is observed, as shown on the pipes
Pi = Combustible wall
Pp = Floor protection
5.4 COMBUSTION AIR
During operation the boiler takes in a certain amount
of air from the room where it's installed; this air must
be replaced through an opening to the outside from
the room (Fig. 5.3 - PA = Fresh air vent).
If the wall behind of the boiler is an outside wall,
make an opening for drawing in combustion air
dimensions shown on the product data sheet at
the end of this booklet.
In general, the minimum opening section required
for the air intake must be 6 cm
(minimum section possible 100 cm2) if near the
A permanent non-closable vent cover must be
placed on the outside of the opening; in especially
windy areas or places exposed to bad weather,
install rain and wind protection elements.
Make sure that the air vent is located in such a way
that it can't be accidentally obstructed.
If it's not possible to make a fresh air opening in
the wall behind the boiler (not a perimeter wall),
an opening must be made on the wall in the room
where the boiler is installed that faces the outside.
If no fresh air opening can be made in the room, it
two rooms are connected by a ventilation grill (Fig.
5.4 - C = Shutter box, G = Grill, S = Shutters).
Standard UNI 10683 prohibits combustion air being
drawn in from garages, combustible material stores
If there are other heating appliances in the same
room, the fresh air vents must guarantee the
required volume of air for correct operation of all
the appliances.
If one or more exhaust fans (range hoods) are
installed and operating in the room where the boiler
is located, combustion problems may occur due to
a lack of combustion air.
If in the room there are other generators, the total
amount of burned power must not exceed 35
kW, and ventilation should be properly calculated
based on the total of the power and the technical
INSTALLATION
2
per kW of power
Pi
150 cm
Pp
PA
C
G
Pi
Fig. 5.2
Fig. 5.3
S
Fig. 5.4
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