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2. Installation
General instructions
BOILER HAS TO BE INSTALLED EXCLUSIVELY BY SPECIALIZED AND TRAINED WORKERS AND ALL THE
INSTRUCTIONS GIVEN IN THIS TECHNICAL MANUAL HAVE TO BE KEPT, AS WELL AS ALL THE VALID
PRESCRIPTIONS, ALL REGULATIONS FROM THE EN NORMS, ALL STN NORMS, ALL SAFETY
PRESCRIPTIONS AND ALL WARNING SIGNS.
Place of the installation
Sphere of combustion of device is totally hermetic to the surrounding environment, and thereby it is possible to install
device in any kind of room. It is necessary to have sufficient ventilation in the room, where the boiler is going to be installed
to avoid from danger of the gas release (even if small). This safety norm is given by the Ordinance EHS Nr.90/936 for all the
gas using devices and also for devices with so called hermetic chamber. The boiler has to be installed in the dustless room,
where are no flammable materials or corrosive fumes.Room must be dry and the inside tempreture must not decrease under
0°C. Boiler has to be hung on the wall and therefore it is equipped with the console. Boiler has to be clamped in the way
ensuring its stable and efficient position. It is necessary to leave sufficient space for maintenance, in case that the boiler is
placed in the corner or if there is a furniture around. By installation , keep safe distance of the boiler surface from flammable
materials in dependence on combustibility grade:
- from materials of the combustibility grade B, C1, C2
100mm
- from materilas of the combustibility grade C3
200mm
- from materials of the combustibility grade not tested under STN 73 0853
200mm
Examples of the building materials sorting by combustible grade:
- combustible grade A - non-combustible (brick, adapting pieces, ceramic tiles, parget, mortar )
- combustible grade B -very hard combustible (heraklith, lignos, boards from basalt felt)
- combustible grade C1 - hard combustible (beech, oak, plywood, werzalit, hard paper )
- combustible grade C2 - medium combustible (pine wood, spruce chipboard, solodur)
- combustible grade C3 - easy combustible (wood-fibre-boards, polyurethane, PVC, molitane, polystyrene)
Solid materials of the combustible grade A can be used as non-combustible and isolation matters. Items made from
combustible materials must not be placed on the boiler and in the distance of 500mm from boiler.
Hydraulical connections
The ATTACK boilers are intended for heating systems with forced heating water circulation. Intensity of the water flow can
be set by switch on the pump. Before is the heating system filled with water, it is necessary to clean the system properly. It is
necessary to flush heating bodies and distribution pipes several times.To flush and clean the system properly it is
recommended to use cleansing articles. Filter must be mounted at the inlet into the heating system. It is recommended to use
copper filter with side cleaning and it has to be cleaned in regular intervals, depending on system clogging. Due to the
maintenance and servicing it is recommended to mount closing valves at the inlet and outlet of central heating and D.H.W.
Filter and valves are not delivered as accessories of the boiler. Heating system has to be also equipped with inlet valve
(installation with ATTACK KT boiler) with reverse flap, connected to water supply system to fill and pressure the heating
system. Boilers ATTACK KST and KZT Plus are equippped with filling valve with reverse flap.
Warranty is not valid for cases of clogging or stucking of exchanger or pump caused by dirts from the system!
Water callosity in the heating system cannot excess 3 mmval/l . In case of exchanger damage caused by boiler operation
with water of callosity higher than 3 mmval/l is warranty for exchanger also not valid. Expanse vessel of 7 or 8l installed in
the boiler enables connection to the closed heating system. If it is neccessary due to the size of the heating system, it is
possible to install additional expanse vessel. There should be difference of 15-20°C between outlet and inlet boiler heating
water. In case of reconstruction of the heating system or new system, it is recommended to use low-voluminous heating
appliances and distribution pipes in as small dimmensions as possible for quick system temperature reaction and
considerable flexibility of the system.
Process of filling with water: boiler has to be disconnected from electricity mains. Open deareation valves on boiler and
heating system. System has to be pressurized for at least 1 bar and deareated again. If the pressure decreases, it is neccesary
to pressurize it again.
Heating system must conform to valid norms and prescriptions:
STN 06 0310 - projection and installation of the central heating system,
STN 06 0830 - Assurance of appliance for central heating system
STN 06 0830 - Expanse vessel size
STN 07 7401 - Water in heating system
If the expanse vessel volume exceeds 7 or 8 litres it is necessary to add next expanse vessel with volume adequate to the
difference. To use maximum condensation effect it is necessary to dimensionize heating system to gradient 50/30°C. Fall
from the safety 3-bar valve has to be connected to the waste pipe. Heating system has to be equipped with suitable filter. For
maximum output of the heat exchanger, its correct function and long lifetime it is necessary to ensure minimum
overpressure of the heating system of 0,8bar. Built-in expanse vessel enables boiler connection to closed heating system.
Boiler has to be placed to ensure necessary operation conditions, adequately to design of the combustion air inlet and flue
gas exhaust.
V =V . v . 1,3
C
V - volume of expanse vessel
C
V - volume of water in heating system
v -
appropriate volume increase by warming to t
m
t =80°C is v =0,029
m
