Viadrus G 700, Manual

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the pump damage. Water for boiler and heating system filling must be clear and colourless , with no suspended
materials, oil and aggressive chemicals. Parameters of circulating and refilling water must correspond with
standard as follows :
Tab. č . 3 The maximum permissible values of heating water according to e Č SN 07 7401:1992
hardness (mmol/l) 1
Ca2+ (mmol/l) 0,3
total Fe + Mn concentration (mg/l) 3*
*recommended value
In case that the water hardness doesn’t comply with standard it must be treated. Even heating the water with
a higher hardness several times does not prevent the soils from getting precipitated on the boiler drum walls.
Precipitation of 1 mm calcite reduces at a given point the heat transfer from the metal to water by 10%.
During the heating season the heating water volume in heating system must be kept constant and it has to be
prevented from air intake. Water from boiler and heating system must never be discharged or taken for usage
except for the emergency cases like repairs etc. Water discharge and filling with new water increases the danger
of corrosion and scale development.
In case we have to refill the heating system with water we only refill a cold boiler in order to prevent the
boiler sections from disruption.
4.2. Regulations and guidelines
The boiler can only be installed and maintained by special contractual service firm holding a valid IPB
and ITI authorization to do the installations that is regularly retrained by the manufacturer. A project
according to the valid regulations must be prepared for installation.
a ) regarding the heating system
Č SN 06 0310 : 1983 Central heating , design and assembly
Č SN 06 0830 : 1996 Safety devices for central heating and TUV( hot service water) heating
Č SN 07 7401 : 1992 Water and steam for thermal energy equipments with steam service pressure up to 8 MPa
b )
regarding the gas distribution
Č SN EN 1775 : 1999 – Gas supply–Pipelines in buildings–Maximum service overpressure less than 5 bar.
Č SN 38 6413 : 1990 – Gas conduits and connections with low and medium pressure
Č SN 07 0703 : 1986 – Gas boiler rooms.
Č SN 38 6405 : 1988 – Gas equipments . Operation principles .
Č SN 38 6420 : 1983 – Industrial gas conduits.
Act no. . 222/94 Coll. on business conditions and state administration in energy branches and on state
energetic inspection .
Regulation 91/93 Coll. issued by Czech Labour safety Office on work safety provision in low-pressure
boiler rooms.
c ) regarding liquid fuel distribution
Č SN 65 0201:1992 – Flammable liquids . Facilities and storerooms.
Reg. MV Č R č . 35/77 on fire safety at heating oil storage and use
PO 1410/65 z 1. 3. 1966 – interim instruction for heating with heating oil and furnace oil in view of fire
protection
d) regarding the electricity network
Č SN 33 2180 : 1980 Connection of electricity devices and appliances.
Č SN 33 2000-3 : 1995 Electrical regulations. El. equipment. Part 3 : Basic characteristics definition.
Č SN 33 2000-7-701:1997 Electrical regulations. El. equipment. Part 7 : Single-purpose equipments and in special
buildings.
Č SN 33 2130 : 1985 Electrical regulations. Internal electric wiring.
Č SN IEC 446 : 1989 Electrical regulations. Conductors marking with colours or numerals. Implementing
regulations.
Č SN 33 0165 : 1992 Electrical regulations. Conductors marking with colours or numerals. Implementing
regulations.
Č SN 33 2350 : 1983 Regulations for electric equipment under difficult climatic conditions .
Č SN 34 0350 : 1965 Electrical regulations. Regulations for movable connections and cord conducts .
Č SN 33 1500 : 1991 Electric equipment revisions
Č SN EN 60 335- 1 : 1997 Safety of el. appliances for household and similar purposes. Part 1- general requirements
If the selected burner has not its main switch it is necessary according to
Č SN 07 5801:1990 – Gas fuels
burners – to install the main switch within the grasp of burner . The supply must be secured according to burner
manufacturer ´s instructions.