Risk Of Death Caused By Fire Or Explosion When Removing The Refrigerant; Risk Of Death Caused By Fire Or Explosion If There Is A Leak In The Refrigerant Circuit; Risk Of Burns Or Scalding Caused By Hot Components; Material Damage Due To Unsuitable Installation Surface - Vaillant aroSTOR VWL B 270/5 Installation And Maintenance Instructions Manual

1.7 Risk of death caused by fire
or explosion when removing the
refrigerant
The product contains the combustible refri-
gerant R290. The refrigerant may mix with air
to form a flammable atmosphere. There is a
risk of fire and explosion.
▶ Only carry out the work if you are compet-
ent at handling R290 refrigerant.
▶ Wear suitable personal protective equip-
ment and bring a fire extinguisher with you.
▶ Only use tools and units that are permit-
ted for R290 refrigerant and are in proper
working condition.
▶ Ensure that no air gets into the refrigerant
circuit, into refrigerant-carrying tools or
units, or into the refrigerant cylinder.
▶ Note that the refrigerant R290 must never
be introduced into the sewage system.
1.8 Risk of death caused by fire or
explosion if there is a leak in the
refrigerant circuit
The product contains the combustible refri-
gerant R290. In the event of a leak, escaping
refrigerant may mix with air to form a flam-
mable atmosphere. There is a risk of fire and
explosion.
▶ If you are working on the product when it
is open, before starting work, use a gas
sniffer to ensure that there is no leak.
▶ The gas sniffer itself must not be an igni-
tion source. The gas sniffer must be calib-
rated to R290 refrigerant and set to ≤ 25%
of the lower explosive limit.
▶ Keep all ignition sources away from the
protective zone. In particular, open flames,
hot surfaces with temperatures above
370 °C, electrical devices or tools that are
not free from electrical sources, static dis-
charges.
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1.9 Risk of burns or scalding caused by
hot components
▶ Only carry out work on these components
once they have cooled down.
1.10 Material damage due to unsuitable
installation surface
The installation surface must be even and
have sufficient load-bearing capacity to sup-
port the operating weight of the product. An
uneven installation surface may cause leaks
in the product.
If the installation surface does not have suffi-
cient load-bearing capacity, the product may
topple.
There is a risk of death if the connections are
subject to leaks.
▶ Make sure that the product is positioned
flush against the installation surface.
▶ Ensure that the installation surface has
sufficient load-bearing capacity to bear the
operating weight of the product.
1.11 Risk of injury due to the heavy weight
of the product
▶ Make sure that the product is transported
by at least two people.
1.12 Risk of material damage caused by
frost
▶ Do not install the product in rooms prone
to frost.
1.13 Risk of material damage caused by
using an unsuitable tool
▶ Use the correct tool.
1.14 Risk of material damage caused by
water that is too hard
Water that is too hard may impair the sys-
tem's functionality and cause damage in a
short period of time.
▶ Ask your local water company about the
water hardness.
▶ When deciding whether the water used
must be softened, follow the national regu-
lations, standards, directives and laws.
▶ In the installation and maintenance instruc-
tions for the product that your system com-
Installation and maintenance instructions 8000015884_00