Gas Piping; Gas Codes - Kärcher HDS4.0/22 Dealer's Manual

Operations
Place machine in a convenient location providing
ample support, drainage and room for maintenance
Location
The location should protect machine from damaging
environmental conditions, such as wind, rain and
freezing.
1. The machine should be run on a level surface
where it is not readily influenced by outside
sources such as strong winds, freezing tempera-
tures, rain, etc. The machine should be located
considering accessibility for the replacing of
components and the refilling of detergents, adjust-
ments and maintenance. Normal precautions
should be taken by the operator of the machine to
prevent excess moisture from reaching the
machine.
2. It is recommended that a partition be made
between the wash area and machine to prevent
direct spray from the spray gun from coming in
contact with the machine. Excess moisture
reaching the power unit or electrical controls will
reduce the machine's life and may cause electrical
shorts.
3. During installation of the machine, beware of
poorly ventilated locations or areas where exhaust
fans may cause an insufficient supply of oxygen.
Sufficient combustion can only be obtained when
there is a sufficient supply of oxygen available for
the amount of fuel being burned. If it is necessary
to install a machine in a poorly ventilated area,
outside fresh air may have to be piped to the
burner and a fan installed to bring the air into the
area.
4. Do not locate near any combustible material. Keep
all flammable material at least 20 feet away.
Allow enough space for servicing the machine.
Local code will require certain distances from floor
and walls. (Two feet away should be adequate).
WARNING: Avoid small areas or near exhaust fans.

Gas Codes

Confer with local gas company and with proper
municipal officials regarding any specific code or regu-
lations governing the installation. The installation must
conform to local codes (NFPA 54).
14 Karcher Liberty HDS Stationary Dealer's Manual 9.801-508.0 - AY
Electrical
The machine, when installed, must be electrically
grounded in accordance to local codes. Check for
proper power supply using a volt meter; check the
serial plate for the correct requirements.

Gas Piping

This machine shall be rigidly connected to the gas
piping outlet and equipped with external manual shut-
off valves adjacent to such machine. All gas piping shall
be approved and installed in accordance with the
Uniform Mechanical Code.
Install a gas union in the gas line adjacent to and
upstream from the control manifold and downstream
from the manual main shut-off valve. A 1/8" NPT
plugged tapping accessible for test gauge connection
shall be installed immediately upstream of the gas
supply connection for the purpose of determining the
gas supply pressure to the burner, and to prevent
damage to gas valve.
If a manual gas shut off valve is not in the gas supply
line within six feet of the machine and in an accessible
location, one shall be installed.
Union Location
Drop
1/8" NPT Plugged Pressure Gauge
Port Location
Floor Level
Union Connection
The following pipe sizes are just recommendations.
Always consult a local plumber and venting contractor
for local codes and regulations during installation.
Manual
Shut-Off
Valve
Union