IO-752:2018/EN 05.12.2018
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less than 3 Pa (0.03 mbar) and not more than 15 Pa
(0.15mbar).
3.1.5 Gas system
Gas appliances should be permanently connected to
steel or copper pipes of the gas system or by means of
metal tubes.
Liquefied gas system
•
Gas appliances fed with liquefied gas cannot be
installed in rooms where the floor level is situated
under the ground level.
•
The cylinders should be situated in a distance not less
than 1.5 m from heat radiating surfaces (radiators,
stoves, etc.).
•
The cylinders cannot be exposed to radiation of
places with open fire.
•
The cylinders should be situated in vertical position,
protected against falls, beats, from children etc.
•
The cylinders should be placed in a distance of at
least 1 m from devices likely to cause electric
sparkling, e.g. electricity meters.
•
The room temperature where the cylinder will be
located cannot 35
o
C.
Recommendation:
Because the one gas cylinder with the capacity of 11 kg
in the exploitation of the water heater is sufficient for a
short time, it is recommended to use a set of 11-kg
cylinders, so called battery, or a bigger cylinder with the
capacity above 11kg. Such a battery or (max. 10
cylinders) or a larger cylinder should be placed outside
the building.
3.2 Preliminary check-up
operations
Before installation, it is necessary to check if:
•
the purchased water heater is adapted for combustion
the type of gas supplied from the gas mains which the
appliance will be connected to. The type of gas the
water heater has been adapted for is designated on
the packaging and the marking plate placed on the
front cover.
•
the water system has been rinsed thoroughly with
water, in order to get rid of possible rust, scale, sand
or other foreign matter, which could disturb the proper
operation of the water heater (e.g. increase the
resistance of water flow in the system).
3.3 Water heater mounting
Water heater should be installed in a place not posing
significant difficulties for a service team, on a wall made
of non-flammable materials or isolated from an
inflammable wall with a plate made of non-flammable
material.
In case of building the water heater over in a furniture
system, air supply necessary for proper gas combustion
should be provided (Illus. 3.3.1).
Do not mount the water heater in the neighborhood of
appliances likely to disturb its operating (e.g. over a
cooker from which vapors rise).
Mount the water heater on the wall, on hooks
permanently fixed in it, using two rectangular notches
on the water heater back cover.
Fig. 3.3.1 Required mounting distances
3.4 Connecting to the gas supply
Fig.3.6.1 shows the connection diameters. For gas pipe,
the diameter is G3/4.
Gas water heaters not equipped with gas flow stabilizer
are adopted to be installed in the gas system equipped
with individual mean pressure reducer. Cables with a
valid certificate should be used for installation.
On the system pipe should be installed a cut off
valve and a gas filter. Installing the gas filter is
necessary for correct and long-lasting operation of
the gas unit and the burner. Filter is not included in
the installation kit.
3.5 Connecting to the water supply
Fig.3.6.1 shows the connection diameters. For water
pipe, the diameter is G1/2. On the system pipe should
be installed a cut-off valve.
Connecting the water heater to the water supply system
should be performed by means of flexible connectors or
stiff pipes. These pipes are not included in the
installation kit.
The connection to the water system should be made in
such a way that the geometry of the water heater is
maintained. Incorrect execution of the connection may
cause distortion of the water heater, which may make it
impossible to mount the knobs or lead to their blocking.
In order to stop mechanical pollution, and thus,
provide the water heater reliability and its long-term
operation, a water filter should be installed on the
supplying pipe. The filter must not cause any
resistance for a water flow and should be easy
cleaning. The filter is not included in the basic water
heater equipment.
