Servicing
29
Placement of the boiler with respect to fire regulations:
A safe distance from flammable materials:
−
when installing and operating the boiler it is necessary to keep a safe distance of 200 mm from the
materials of combustibility grade A1, A2, B and C (D);
−
for easily combustible materials of combustibility grade E (F), which quickly burn and burn themselves
even after removal of ignition source (such as paper, cardboard, asphalt and tar paper, wood and
woodfiber boards, plastics, floor coverings) the safe distance has to be doubled, i.e. to 400 mm;
−
safe distance should be doubled also where the grade of reaction to fire has not been proved.
A safe distance from surfaces of materials with individual degrees of flammability and information of the
flammability degree of common building materials, if necessary, for appliances which can be operated in the
immediate vicinity of walls made of flammable materials will be defined with the maximum permissible
temperatures of surface or wall temperature increase according to
Č
SN EN 13 501 – 1 + A1.
Grade of reaction to fire
Grade of reaction to fire
Examples of building materials and products included in the reaction to fire
(Extract from
Č
SN EN 13501-1 + A1)
A1 – incombustible
granite, sandstone, concrete, bricks, ceramic tiles, mortars, fireproof plasters, …
A2 – combustible with
difficulty
acumin, izumin, heraklit, lignos, boards and basalt felt, fibreglass boards,...
B – hardly combustible
Beech and oak wood, hobrex boards, plywood, werzalit, umakart, sirkolit,...
C
(D)
–
medium
combustible
Pinewood, larch, whitewood, chipboard and cork boards, rubber flooring,…
E (F) – easily combustible
Asphaltboard, fibreboards, cellulose materials, polyurethane, polystyrene,
polyethylene, PVC,…
10.3 Boiler Installation
Using the installation stencil (the stencil is printed at the bottom of the carton packaging of the boiler) attach
the enclosed bracket to the wall using 3 pieces of dowels with diameter of 8mm and bolts. Mount the NAOS
K4 boiler on the bracket and using the marked outlets the boiler is connected to the heating system incl. hot
water (if used) and gas distribution pipe according to Fig. no. 10. The connection of condensate outlet should
be in compliance with the effective valid
Č
SN and EN standards. Then the flue gas exhaust is connected
according to the project documentation. Remove the protection foil from the front cover.
Fig. no. 10 Mounting bracket, connecting dimensions
