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7.4.
Connecting the appliance to the gas system
In order to ensure stable operation of the appliance it is necessary to effectuate the gas line connection
7.4.1.
with metal pipes or flexible hose with an internal diameter not less than 13 mm. The flexible hose for supplying
gas, in accordance with the SP 62.13330.2011 requirements must be resistant to the supplied gas at given tem-
perature and pressure. Flexible hose length should not be more than 2.5 meter, Flexible hoses installation rules
are given in p. 7.6. Pipes or a flexible hose should be connected to the fitting 7 (see scheme. 1,2) after removing
the protective gag from it.
7.4.2. Installation of pipelines' dismountable joints should be kept to a minimum.
7.4.3. When installing a gas line to the appliance, there should be obligatory a stop valve installed by the appli-
ance's inlet. The stop valve must be easily accessible.
7.4.4. Connecting the gas pipe must not be accompanied by mutual interference of pipes and parts of the appli-
ance in order to avoid displacement or breakage of individual details and parts of the appliance and a violation
of the gas line air-tightness.
7.4.5. After connecting the appliance to the gas line, the joints of connection with the pipes should be tested on
air-tightness. Air-tightness check in the joints of gas supply is made on non-operating appliance and when the
appliance's inlet stop valve is open. Gas leakage is not allowed.
Checking the air-tightness of the gas joints is effectuated by means of soap solution bubble test of the con-
nection points (or other safe methods without using open flame). Appearance of bubbles indicates gas leakage.
7.5.
Connecting the appliance to the LPG cylinder
7.5.1. Before connecting the appliance to LPG cylinder make sure that your appliance is adjusted to work
with this type of gas. Otherwise it is necessary to render it (see p. 7.10).
7.5.2. The LPG cylinder must be equipped with a reduction unit with vapor phase stabilization pressure 2.9
kPa, and the vapor phase output at least 1 m3/h.
ATTENTION! Usage of reduction units with stabilization pressure different from 2.9 kPa is PRO-
HIBITED.
7.5.3. The length of a flexible hose for connecting the appliance should be not more than 2.5 m and the inner diameter not less
than 12 mm. A flexible hose for gas supply should be resistant to the supplied gas at given temperature and pressure. Rules of flexible
hoses installation are given in p. 7.6.
7.5.4. A gas stop valve should be installed by the appliance's inlet. It must be easily accessible.
7.5.5. After the mounting termination, it is necessary to check the joints and the entire length of the connecting hose on the subject of
gas leakage (see p.7.4.5).
7.5.6. In order to avoid accidents it is PROHIBITED TO:
- store gas cylinders and hoses under direct sunlight, next to heat sources (ovens, stoves, radiators and other heating appliances);
- heat the gas cylinders with a flame or heating appliances;
- use damaged gas cylinders.
7.5.7. It is recommended to store gas cylinders in a special metal cabinet to restrict access of children or other unauthorized per-
sons.
7.6. Rules of flexible hoses installation
7.6.1. Flexible hoses applied for the appliance's connection, should be certified for the appropriate
use.
Upon their working lifespan termination they should be obligatory replaced.
7.6.2. If the appliance is connected by means of the flexible hoses, it is necessary to take into ac-
count the following rules of mounting:
- do not twist the hose relative to the longitudinal axis;
- prevent the hose from bending close to the tips: the length of hose's area next to the scaling-off,
which shouldn't be subject to bending shall be not less than 50 mm;
- The hose's bending radius, as measured by the external forming shall be not less than 90 mm.
It is recommended to:
-
use angle connections and adapters to avoid hoses fractures next to the tips
-
use interval supports when long hoses are mounted;
-
At rectilinear arrangement mount the hoses with sagging.
Recommended mounting schemes of the flexible hoses are presented in the table 3.
7.6.3. Mounting a hose is necessary to begin with the non-movable elements of the hose which have a pipe thread (if a counter-
part is stationary).
7.6.4. Sealing of the fitting's threaded joint with a counterpart (radial connection) must be made using a Teflon tape sealing ma-
terial (FCM) or sealant that provides air-tightness of the threaded joint.
7.6.5. The threaded joint of the coupling nut (end connection), for the movable and also non-movable parts with a counterpart fit-
ting must be performed applying gaskets. Gasket material- oil and petrol resistant rubber, asbestos-free paronite
polytetrafluorethylene (Teflon).
User's and technical staff manual
and
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