Karcher WB-50A Wastewater Evaporator 11034740

User Manual - Page 6

For 11034740.

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6
WATERMAZE SERIES OPERATOR’S MANUAL
WB • 8.913-984.0-N
5.
If 208V single phase is the only available electrical
source, the step down transformer must be changed to
a 208/120V .500KVA transformer or a buck boost trans-
former must be installed to raise the voltage to 230V.
PUMP SAFETY
WARNING: Do not pump high
concentrations of flammable
liquids or explosives such as
gasoline, fuel oil, kerosene, etc.
Do not use in explosive atmo-
spheres. The Water Maze should
only be used with liquids compat-
ible with Water Maze component
materials. Failure to follow this
warning could result in personal injury and/or prop-
erty damage.
1. Know the pump application, limitations and potential
hazards.
2. Make certain that the power source conforms to the
requirements of your machine; 230V single phase
for all WATER MAZE machines. Always check the
serial plate for power requirements.
3. Release all pressure within the system before servic-
ing any component.
4. Drain all liquids from the components before
servicing.
5. Check hoses for weak or worn condition before each
use, making certain all connections are secure.
6. Periodically inspect sparger tube, nozzle, filter and
other system components. Perform routine mainte-
nance as required.
Personal Safety:
a. Keep work area clean, uncluttered and properly
lit. Replace all unused tools and equipment.
b. Keep visitors at a safe distance from the work
area.
c. Make the workshop safe with padlocks, master
switches and power lock out devices.
7. All wiring and electrical connections must be per-
formed by a qualified electrician.
8. Protect the electrical cord by having the electrician
run all electrical wiring through conduit from the
power source to the machine.
9. Use wire of adequate size to minimize a voltage drop
at the motor.
10. Disconnect the power before servicing a motor or
other components. If the power disconnect is out-of-
sight, lock it in the open position and tag it to prevent
unexpected application of power.
WARNING
RISK OF FIRE OR
EXPLOSION:
OBEY SAFETY
INSTRUCTIONS.
11. Do not touch an operating motor. Modern motors
are designed to operate at high temperatures.
STANDARD SAFETY FEATURES
The WATER MAZE uses electricity, gas and water to
operate. These can be fatal if not handled properly. For
this reason, the WATER MAZE has been designed with
safety in mind. The following are standard safety features
you will find on all WATER MAZE equipment.
Interlock System:
The WATER MAZE has an interlock system which must
be proven before the burner will ignite. All of these inter-
locks are proven through the Veri-Flame.
1. Pre-Ignition Interlocks:
a. High/low gas pressure switches
These switches insure that there is enough gas
pressure to operate the burner but not excessive
pressure (see page 20).
NOTE: The low pressure switch is set at 12 water
column inches (wci). The high pressure switch
is set at 60 water column inches (wci).
b. Air Pressure Switch
This switch insures there is at least 12 water
column inches of air pressure. NOTE: The High,
Low Gas and Air Pressure Switches have inter-
nal lights. If there is a failure, the light goes out.
See pages 43 & 45.
c. Gas Solenoid Valve
This valve must be closed during pre-ignition
checks. If open, the system will shut down.
NOTE: The WB-50 has three gas solenoid
valves. The WB-120 has six gas solenoid valves
(see pages 43-45).
d. 3 Point Sensor Control:
The evaporation tank must have a minimum
amount of water to prevent damage to internal
parts due to excessive heat. If the water level is
at the bottom rod on the 3 Point Sensor Control,
ignition of the burner is prevented (see item 3
page 27).
2. Post-Ignition Interlock:
UV Scanner
A UV scanner looks for the ignition of the burner.
Once the WATER MAZE has gone through the inter-
locks and the 15 second purge process, the burner
goes through an ignition sequence. If the burner fails
to ignite, the UV scanner shuts down the burner.
Filter:
A 20 mesh screen on the incoming waste water line
prevents solids from entering and damaging the pump.
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