K4
Changes in models reserved.
Dimensions not binding!
4 Boiler Design
The
K4
range of compact, wall hung condensing boilers are suitable for Heating & Hot Water genera-
tion (depending on model).
The boiler is equipped with a Fully Condensing Stainless Steel heat exchanger, which is fitted with
optimally matched premixed burner. The optimal combustion air/gas ratio is controlled throughout the
entire output range via a modulating fan.
4.1 Flue Options
The boiler may be flued, to terminate as follows:
-
Flued through a Wall via a Coaxial Balanced Flue
-
Flued through a Roof via a Vertical Balanced Flue
-
Flued into a suitably constructed compliant chimney
4.3 Control Feature
The range is supplied with a digital controller, which allows fast and easy temperature changes, also
fitted is an easy to read pressure gauge to monitor the pressure in the heating system. The boiler can
be easy controlled by a volt free room thermostat or an Open Therm control system, there is also the
possibility to connect an outside sensor and on the
K4G3H..
models a hot water sensor can also be
connected.
4.2 Dimensions
General Information
15
4
Boiler Description
4.1
Boiler Design
The boiler elementary structure consists in a condensing exchanger made of stainless steel pipes. It is checked for tightness by test
overpressure 5 bar. The boiler is further equipped with a premix burner. The combustion mixture is mixed in a mixer in the preset air-gas ratio
within the entire output range. Air is supplied to the mixer by a modulation fan.
The boiler is made in three versions:
VIADRUS K4G
1
HXXXX
version designed for heating only is equipped with a circulation pump
VIADRUS K4G
2
HXXXX
version with a circulation pump and flow type hot water (hereafter referred to as “DHW”) heater
VIADRUS K4G
3
HXXXX
version with a circulation pump and a three-way valve ready to be used in combination with a reservoir type hot
water heater
The Honeywell automatics is an electronic control and ignition automatics designed for gas-fired central heating boilers with a modulated fan
and burner with preliminary mixing.
The combustion air inlet and the flue gas outlet may be implemented by several means as follows:
-
to the chimney,
-
through the wall,
-
through the roof (either inclined or horizontal),
-
to a joint shaft.
The boiler is an appliance in version C, i.e., a closed appliance with electronic ignition and flame ionization.
4.2
Control Features
Fig. №. 2
The VIADRUS K4 boiler control panel
4.2.1
Removing the front cover
•
Remove the bolts (1)
•
Pulling the cover side detach
the Velcro strip (2)
•
Remove the front cover
Fig. №. 3
Removing the boiler front cover
1
electronic panel with the control panel
2
pressure gauge
3
valve for adding water to the heating system
Servicing
29
10.2
Possible Placement
The installation and operation of the boiler shall comply with all requirements of
Č
SN 06 1008.
The boiler placement shall comply with the project documentation. The flue gas exhaust shall comply with the valid regulations. Ports of
individual pipes for supply of combustion air and discharge of flue gases shall be located in such a way that they are located inside a square
with a side of 50cm by the boiler. The boiler can be placed on a wall with ensured loading capacity only.
At least 0.2 m
shall be left free beside the boiler and above the boiler and
at least 1 m
shall be left free in front of the boiler for assembly and
repairs.
The boiler also can be placed in a room with the basic environment according to
Č
SN EN 33 2000-1 ed 2.
Fig.
№
. 10
Main dimensions of the boiler
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.
Tab.
№
. 6
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 8 mm and bolts. Mount the VIADRUS 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. 11. 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.
Servicing
29
10.2
Possible Placement
The installation and operation of the boiler shall comply with all requirements of
Č
SN 06 1008.
The boiler placement shall comply with the project documentation. The flue gas exhaust shall comply with the valid regulations. Ports of
individual pipes for supply of combustion air and discharge of flue gases shall be located in such a way that they are located inside a square
with a side of 50cm by the boiler. The boiler can be placed on a wall with ensured loading capacity only.
At least 0.2 m
shall be left free beside the boiler and above the boiler and
at least 1 m
shall be left free in front of the boiler for assembly and
repairs.
The boiler also can be placed in a room with the basic environment according to
Č
SN EN 33 2000-1 ed 2.
Fig.
№
. 10
Main dimensions of the boiler
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.
Tab.
№
. 6
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 8 mm and bolts. Mount the VIADRUS 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. 11. 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.
Servicing
29
10.2
Possible Placement
The installation and operation of the boiler shall comply with all requirements of
Č
SN 06 1008.
The boiler placement shall comply with the project documentation. The flue gas exhaust shall comply with the valid regulations. Ports of
individual pipes for supply of combustion air and discharge of flue gases shall be located in such a way that they are located inside a square
with a side of 50cm by the boiler. The boiler can be placed on a wall with ensured loading capacity only.
At least 0.2 m
shall be left free beside the boiler and above the boiler and
at least 1 m
shall be left free in front of the boiler for assembly and
repairs.
The boiler also can be placed in a room with the basic environment according to
Č
SN EN 33 2000-1 ed 2.
Fig.
№
. 10
Main dimensions of the boiler
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.
Tab.
№
. 6
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 8 mm and bolts. Mount the VIADRUS 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. 11. 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.
19
Boiler Design