Karcher HDS 12-14-4 ST Gas - Manual (Page 36)

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– The heating appliance of the machine is an ignition plant.
Please follow the local regulations while installing it.
– Use only certified chimneys/exhaust pipes.
– The installation of gas pipes as well as the gas-side connec-
tions of the appliance should only be done by a company spe-
cialised in gas and water installations.
– Settings and repairs to the gas burner should only be carried
out by trained Kärcher Customer Service Technicians.
– There should be a manometer and a locking valve in the gas
pipe that should have a minimum diameter of 1 inch.
– Due to the vibrations caused by the high pressure pump, the
rigid gas pipe must be connected to the appliance using a
flexible gas hose.
– For gas pipes that are more than 10 m in length, the diameter
must be 1 1/2 inch or more. The gas connection to the appli-
ance has a diameter of 1 inch.
ƽ Danger
While attaching the flexible gas hose to the burner, the connec-
tion nipple must be held with a fork key SW 36. The connection
nipple should not get twisted vis-a-vis the burner casing. The
threaded connection should only be sealed using a sealant ap-
proved by DVGW. After connection, check the joint using a
DVGW leak-search spray to ensure that the joint is leakproof.
The width of the gas pipe must be calculated according to DVGW
TRGI 1986 or TRF 1996. The diameter of the gas connection to
the appliance does not automatically become the diameter of the
pipe connection. The dimensioning and installation of the gas
pipes must be done according to the corresponding norms and
regulations.
– Each appliance must be connected to a separate chimney.
– The exhaust system must be designed according to the local
rules and regulations after consulting the concerned chimney
expert.
Gas appliances without flow controller where all parts of the ex-
haust system that are subjected to excess pressure are free of
combustion air. The B23 installation opens new options of con-
necting the appliance to a traditional single-draught chimney ac-
cording to DIN 18160 and operating it depending on the air
conditions in the room. The only requirement is that the chimney
must be suitable for being connected to combustion devices (i.e.
it has been cleaned by inserting a stainless steel pipe).
Gas appliance with combustion air supply and exhaust system
placed vertically over the roof. The inlets are located almost close
to each other in the same pressure range.
Installing the plant
Only for authorised technicians!
General
Generall rules for gas
Gas pipes
Ventilation / exhaust system
!
Gas appliances with an exhaust system that sucks out the
combustion air from the installation room
Type B23
Gas appliance with an exhaust system that removes the
combustion air into the open via a closed system
Type C33
36 EN