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Checking the water pressure
Check the water pressure in the system at regular inter-
vals, as described in chapter 8.1 page 77.
Filling the heating system
The replacement water must be of the required quality.
The quality requirements are stated in the installation ins-
tructions in the "Water quality" chapter (Filling and repla-
cement water).
Maintenance, cleaning and inspection
The boiler, burner and calorier must be cleaned and ser-
viced 1x annually by a heating specialist. An important
precondition for economical operation and for maintai-
ning good air quality is the sound technical condition of
your burner system. The burner must be inspected by a
heating specialist once a year.
Taking out of operation / frost protection
The system must be entered if there is a risk of frost; con-
tact the heating specialist for advice if necessary.
Taking out of operation must be carried out according to
chapter 6.6.1 ("Preparation" section steps "1-6") of the
Technical information/Installation instructions.
Corrosion protection
Do not use sprays, solvents, chlorine-based cleansing
agents, paint, adhesives etc. in the proximity of the unit.
Under certain circumstances, these substances can
cause corrosion inside the boiler and the ue gas system!
Keep the room clean
Keep the room in which the boiler is installed clean at all
times and turn o the burner before starting cleaning to
avoid any faults due to dusty combustion air.
2.2 Intended use
The Hoval UltraGas®2 boiler is exclusively intended for
heating the heating water.
The heat produced must be carried away by the heating
water. All boiler openings must be closed during operati-
on.
Only use the boiler if in perfect technical condition, as well
as according to the intended use, safely and with regard
to potential dangers!
The inspection and cleaning intervals stated in the do-
cuments must be complied with. Malfunctions that could
impair safety must be rectied immediately!
The manufacturer/supplier will not accept any liability for
any other use, or use beyond the scope of these deni-
tions, and any resulting damage.
2. Safety
2.1 General safety instructions
The system may only be placed in operation if
all the relevant standards and safety regulations
have been complied with. Fault-free operation
can only be guaranteed if the operating instructions are
followed.
The rectication of faults and damage resulting from in-
stallation in unsuitable rooms, e.g. hobby rooms, work-
shops, etc. as well as the use of contaminated operating
materials (gas, water, combustion air), unsuitable che-
mical additives to the heating water, improper handling,
faulty installation, unauthorised modications and dama-
ge due to the use of force do not fall under our obligations
under warranty.
Behaviour in case of danger
Cut o the fuel (gas) and electricity supplies.
Disconnecting the electrical power supply
The heat generator can only be de-energised by discon-
nection from the mains (fuse). Even when the blocking
switch is set to "0", the plant is still live. Electric shocks
can cause fatal injuries and lead to res.
Behaviour if you smell gas
Danger of explosion if there is a gas leak.
• Do not smoke
• No naked ames
• Avoid the occurrence of sparks
• Do not switch on the light or other electrical appliances
• Open windows and doors
• Switch o the boiler and close the gas shut-o valve
• Leave the room
• Notify the specialist company/installing contractor
• Follow the safety regulations on the gas meter
• Follow the safety regulations of the specialist company
If you smell ue gas
Leaking ue gas represents a risk of poisoning.
• Turn the system o
• Open windows and doors
• Leave the room
• Notify the specialist company
Supply air openings
Air inlets and outlets must not be closed. Danger of poiso-
ning due to incomplete combustion if the supply air ope-
nings are closed.
Exception: Your system is room-sealed - see chapter
1.2 page 5.
Initial commissioning / installation inspection
Initial commissioning of a newly installed system may
only be carried out by a heating specialist. Danger of
poisoning due to incorrect commissioning! A full installati-
on inspection must be completed prior to start-up.
SAFETY