Kranzle therm 601 E-ST 18 User manual

www.kraenzle.com
therm 601 E-ST 18
therm 601 E-ST 24
therm 601 E-ST 36
therm 871 E-ST 48
therm 891 E-ST 48
Operating manual
High pressure cleaner
- GB -
Read and conform safety instructions before use!
Keep instructions in a safe place for later use and
pass them on to any future user.

Contents
Contents ................................................................................................................ 2
Overview ’This is what you have purchased’ ................................................................. 4
Description of appliance ................................................................................................ 5
Technical data .............................................................................................................. 6
General rules ................................................................................................................ 8
Safety precautions – accident prevention ................................................................. 8
Water connection – electrical connection......................................................................11
Putting into operation................................................................................................ 12
Usage as a cold water high pressure cleaner ....................................... 13
Usage as a hot water high pressure cleanerr........................................ 13
Kränzle- technology................................................................................................... 14
Water and cleaning system ................................................................... 14
Lance and spray gun............................................................................. 14
Total stop system................................................................................... 14
High pressure hose and spray device ................................................... 15
Pressure control valve – safety valve.................................................... 15
Thermostat ............................................................................................ 16
Electric heating...................................................................................... 18
Suction of detergents................................................................................................... 19
Decommissioning - frost protection.............................................................................. 20
Care and Maintenance (weekly/yearly) ...................................................................... 22
Changing the oil .................................................................................... 21
Decalcifying the continuous-flow heater ................................................ 22
Particular rules, directives and inspections.................................................................. 23
Troubleshooting......................................................................................................... 24
Small repairs – do it yourself ...................................................................................... 26
2

3
Page
Spare parts lists.........................................................................................................28
Water inlet .............................................................................................28
Water supply..........................................................................................29
Heating module 18/24 kW .....................................................................30
Heating module 36/48 kW .....................................................................31
Electric module 18/24 kW......................................................................32
Electric module 36/48 kW......................................................................34
Engine bearing ......................................................................................36
Unloader valve and pressure switch......................................................38
Pump .....................................................................................................42
Pump motor...........................................................................................46
Valve housing ........................................................................................48
Electronics switchbox ............................................................................50
Safety valve...........................................................................................52
Flow monitoring device..........................................................................53
Gun 'Starlet'...........................................................................................54
Pipeline plan ..............................................................................................................55
Wiring diagram 18/24 kW.............................................................................................56
Wiring diagram 36/48 kWl............................................................................................57
Inspection reports- attestation form .............................................................................58
EG – Declaration of Conformity ...................................................................................68
Guarantee ..............................................................................................................59

4
This is what you have purchased
1. Kränzle hot water high-pressure cleaners
therm E-ST, electrically heated
2. Steel-fabric high-pressure
hose, 10 m, NW 8
3. Safety spray gun with insulated
handle and screw connection
4. Spray lance
5. Operating manual

5
Operating panel
Water inlet with filter
High-pressure outlet
3 m power lead (without plug)
Front door, lockable
Stainless steel housing
Description of appliance - Kränzle therm E-ST
Master switch (appliance ON-OFF)
Heating switch (burner ON/OFF)
Brief operating instructions
Pressure gauge – high pressure
Digital thermostat for adjusting
water temperature
Detergent switch (ON-OFF)

6
Technical data
Operating pressure, continuously adjustable 30 - 100 bar (nozzle 25045) 30 - 100 bar (nozzle 25045)
Operating pressure, continuously adjustable 30 - 160 bar (nozzle 2503) 30 - 160 bar (nozzle 2503)
Admissible overpressure, nozzle size 25045 120 bar 120 bar
Admissible overpressure, nozzle size 2503 170 bar 170 bar
Water output 180 - 600 l/h 180 - 600 l/h
Maximum hot water discharge 60 °C at 32 bar 72 °C at 32 bar
Sucked in water is heated by 26 °C with 10 l/min by 26 °C with 10 l/min
Maximum water inlet temperature 60 °C 60 °C
Steel fabric high-pressure hose 10 m 10 m
Connected load 400 V, 32,6 A, 50 Hz 400 V, 41,2 A, 50 Hz
Wattage 20,6 kW 26,6 kW
Heating output 18 kW 24 kW
Fuse 50 A 63 A
Protection type IP 54 IP 54
Weight 220 kg 220 kg
Dimensions in mm (W x D x H) 800 x 650 x 950 800 x 650 x 950
Order No. 41.358 5 41.358 6
therm 601 E-ST 18 therm 601 E-ST 24

7
30 - 100 bar (nozzle 25045) 30 - 170 bar (nozzle 2505) 30 - 220 bar (nozzle 2505)
30 - 160 bar (nozzle 2503)
120 bar
170 bar
180 - 600 l/h 180 - 870 l/h 180 - 900 l/h
80 °C at 32 bar 80 °C at 32 bar 80 °C at 32 bar
by 50 °C with 10 l/min by 46 °C with 14 l/min by 46 °C with 15 l/min
60 °C 60 °C 60 °C
10 m 10 m 10 m
400 V, 58,6 A, 50 Hz 400 V, 80 A, 50 Hz 400 V, 80 A, 50 Hz
38,6 kW 53,5 kW 53,5 kW
36 kW 48 kW 48 kW
80 A 80 A 80 A
IP 54 IP 54 IP 54
220 kg 220 kg 220 kg
800 x 650 x 950 800 x 650 x 950 800 x 650 x 950
41.358 7 41.358 9 41.358 8
Permissible tolerance for figures ± 5 % in acc. with VDMA uniform sheet 24411
therm 601 E-ST 36 therm 871 E-ST 48 therm 891 E-ST 48

Range of application
This machine may only be used for cleaning facades, vehicles, containers, pavement
slabs, stables, machines and similar objects.
Inspections
The machine must be inspected according to the “Guidelines for Liquid Spray Devices” at
least once every 12 months by a qualified person, to ensure that continued safe
operation is guaranteed. The results of the inspection are to be recorded in writing. This
may be done in any form. For inspection reports see pages 48/49.
High-pressure cleaners used for commercial purposes have to be
checked by a qualified person at least every 12 months!
Accident prevention
The machine is designed for accidents to be impossible (if used according to these
instructions). Please read safety notes included in these instructions carefully before using
the machine and act correspondingly. Operating staff has to be instructed according to
this manual. The “Guidelines for Liquid Spray Devices” must be complied with.
Setting up - Location
Neither set up and operate the machine in rooms where there is a risk
of fire or explosion nor put it into puddles. It is prohibited to use the
machine under water.
Do not jam the trigger of the gun during operation!
When carrying through service and maitenance tasks the machine has
to be cut off the power supply system. Put main switch to "0" and pull
plug out of socket .
Never operate the machine if cables or other safety-relevant parts (e.g.
excess pressure valve, high-pressure hose, spraying devices, etc.) are
defective.
8
General rules
Safety notes

9
Safety notes
Never operate the machine without supervision. The machine may only
be operated by persons who have been instructed accordingly.
Some parts inside the machine, all water conducting components and all
metal parts of gun and lance are hot during hot water operation. Keep all
hoods and protective covers closed during operation and never touch
any metal parts of gun or lance.
Persons operating the machine should wear the necessary protective
clothing, i.e. waterproof clothing, rubber boots, safety goggles, headwear
etc. It is prohibited to use the machine in close vicinity to people lacking
suitable protective clothing.
The high pressure spray can generate a high level of noise. If noise
exceeds the maximum allowed levels, users and others in the vicinity
must wear suitable ear protection
.
Do not spray against matter containing asbestos or other hazardous
substances.
For safety reasons always switch the main switch to "0"- postion after
having finished the cleaning task (disconnection from power supply).
Bear in mind that during cleaning tasks
with a high-pressure water jet a significant
recoil at the lance arises.
Additionally angled lances produce a
clearly perceivable amount of torque.
Apply the safety catch on the spray gun
after each use, in order to prevent
unintentional spraying!
Always aim the underbody lance! Bear in
mind when using a curved or angled
spraying lance that there is a significant
amount of torque in the recoil!

10
Safety notes - This is prohibited!
Never allow children to use the high
pressure cleaner!
Never direct the water jet at the
machine itself!
The machine may not be placed within
reach of the water jet spray mist!
Never direct the water jet at a power
socket!
Never direct the water jet at people
or animals!
Only use power cables which are in
perfect working order! Do not damage
the power cable or repair it incorrectly!
Never pull the high pressure hose if
it has formed kinks or “nooses”!
Never pull the hose over sharp edges!

11
Connection to water supply
Please pay attention to the regulations of your waterworks company! In accordance
with DIN EN 61770, the machine may not be directly connected to the public drinking
water supply lines. A brief connection however is permissible according to DVGW
(German Association for Gas and Water Affairs) if a tube ventilator with check valve
(Kränzle Order-No. 41.016 4) is built into the water supply. Also indirect connection to
the public drinking water supply lines is permissible by way of free emission in
accordance with EN 61 770; e.g. by using a reservoir with a float valve. Direct
connection to a non-drinking water supply line is permissible.
Safety notes - This is prohibited!
Electrical connection
The voltage given on the specification plate must match the mains
voltage.
The machine is supplied with power cable without plug. The plug has to be equip-
ped with a safety earth terminal and a 30 mA residual-current circuit breaker.
The mains connection has to be fused with a time-delay fuse according to the
specifications on page 6/7.
If an extension cable is used, it must have an earth line that is properly connected to the
plug connections. The conductors in the extension cable must have the following mini-
mum cross section:
at 18 kW - 6 mm2
at 24 kW - 10 mm2
at 36 kW - 16 mm2
at 48 kW - 25 mm2
Extension cables that are too long cause a drop in voltage and thus
malfunctions. If you are using a cable drum, the cable must always
be fully unwound.

1. Connect to power circuit. Make sure that the main switch is in "OFF" position.
2. Connect machine to water mains (2 - 8 bar pre-pressure). Inside diameter of hose
minimum 1/2 ". The water storage tank fills with water. The float valve shuts the water
intake as soon as the tank is full.
3. Fasten high-pressure hose to appliance
4.
Push on HP hose to gun.
5. Screw together HP hose and gun
pressure-tightly.
12
Putting into operation
6. Always check oil level prior to
operation! Open the HP cleaner.
Do not start the machine if the oil level is not
between the two markings on the oil-level
glass. Refill with oil if necessary.
See page 23.
Take care that all screw connections are pressure-tight. A leakage
of gun, high-pressure hose or hose drum has to be repaired at once.
Leakages lead to an increased wear and guarantee is void if
consequential damages occur.

1. Ignition switch to -OFF- position
Detergent valve must be closed!
(Switch in left end stop position)
2. Switch on main switch with disengaged
spray gun. Vent high-pressure cleaner: Pull
and release trigger of spray gun various
times.
Start cleaning task.
Usage as a cold water high-pressure cleaner
1. a) Temperature mode: Set required tem-
perature at the thermostat.
(Min. temperature 40 °C)
b) Percentage mode: Set percentage
value for heating output.
2. Switch on main switch with disengaged
spray gun. Vent high-pressure cleaner:
Pull and release trigger of spray gun
various times.
Detergent valve must be closed!
(Switch in left end stop position)
3. Start ignition. The water is heated up
and constantly kept at the set
temperature.
Start cleaning task.
Usage as a hot water high pressure cleaner
13

14
Water and cleaning system
The water is fed to the high-pressure cleaner under pressure (2-8 bar pre-pressure).
A float valve regulates the water flow in the storage tank. Then the water is sucked
directly from the storage tank by the high-pressure pump and forced with the adusted
pressure through the heat exchanger to the safety spray lance. The high pressure jet
is formed by the nozzle at the end of the safety lance.
Environmental, refuse disposal and water protection regulations
must be observed!
Kränzle technology
Lance with trigger gun
The machine can only be operated when the safety trigger is squeezed. When the lever
is squeezed, the spray gun opens. The liquid is then pumped to the nozzle. The spray
pressure increases and quickly reaches the selected operating pressure. When the
trigger is released, the trigger gun closes and any further spraying of liquid from the
lance is stopped. The motor stops.
When actuating the gun once more the pressure control valve - safety valve closes and
the motor is started again. The pump resumes feeding water to the spraying lance with
the selected operating pressure. When the gun is closed, the water hammer opens the
pressure control valve - safety valve and the motor is switched off by the pressure
switch.
The trigger gun is a safety device. Repairs should only be performed
by qualified persons. Should replacement parts be required, use only
components authorized by the manufacturer.
Total stop system
The machine is fitted with a Total-Stop-System. If the gun is closed for longer than
approx. 20 seconds, the machine switches off automatically, after 20 minutes the
machine moves to safety switch off and you must use the main switch to turn it back on.
The machine restarts automatically when the gun is operated, provided that the master
switch is on.

15
High pressure hose and spraying device
The high pressure hose and spraying device supplied with the machine are made of high
grade material, they are also optimized for the machine and marked as required by the
appropriate regulations.
If replacement parts are required, only such parts that are authorized
by the manufacturer and which bear the markings required by the
appropriate regulations may be used.
The high pressure hose and spray device must be connected in a
pressure-tight manner.
The high pressure hose may not be driven over, pulled excessively, or
twisted. The hose may under no circumstances be pulled over sharp
edges, since otherwise the guarantee is automatically void.
Hoses are wearing parts. The guarantee only covers defects of
fabrication no external damages whatsoever.
Defective high-pressure hoses and spraying devices may not be
repaired. They always have to be replaced.
Pressure control valve-safety valve
The pressure control valve allows full adjustment of water quantity and pressure. The
safety valve protects the machine from excessive pressure and cannot be adjusted
beyond the admissible operating pressure. The setting nuts are sealed with lacquer .
Replacements, repairs, new adjustments and sealing operations may
only be performed by trained personnel.
Adjustment of pressure, quantity and temperature
The operating pressure, the water
flow and correspondingly the water
temperature ist controlled by the
pressure control valve.
A right-hand turn increases the
pressure, a left-hand turn decreases
the pressure.

16
Kränzle technology
The thermostat controls the spray water
temperature.
After you switch on the device, "888"
appears in both displays for approx. 1
second as a test of the functioning of the
displays.
Thermostat
12 3 4 5 6
The thermostat has two operating modes:
1. Temperature mode
This mode is always activated when the unit is switched on or can be selected using
the "°C°" button (Pos. 3). The red LED above the "°C" button and next to the set
temperature display lights up. The desired "Set" temperature is set using the two buttons
(+/-, Pos. 5+6) and can be read in the upper display (Pos. 1). If you press the button for
a longer time, the set temperature is quickly adjusted in 5°C increments.
The last set value set is also stored after the unit is switched off and is available again
immediately after switching back on.
The current spray temperature can be read from the bottom display (Pos. 2).
2. Percentage mode
This mode is activated by pressing the "%" button (Pos. 4). The yellow LED above the
"%" button and next to the set temperature display ashes.
In the temperature control system in conventional high pressure cleaners, and in
temperature mode for this unit, the water temperature is measured at the outlet of the
heater, and the heater is switched on an off according to the temperature desired by the
user. Due to the large amount of water in the heating coil, it takes a long time until the
temperature sensor registers that the burner has switched on and the desired temperature
has been reached. This means that the temperature increases far above the desired value
or falls far below the desired value.

17
Thermostat - Percentage mode
The innovative new percentage mode now lets the user specify the switching duration
of the heater in percent using the "+" and "-" buttons (Pos. 5+6) (100% being the max.
temperature) rather than setting the desired temperature. Now the result of the setting
must be checked by using the "Actual" temperature display. If the desired temperature has
not yet been reached, the percentage must be increased.
By setting percentages of the heating duration, the temperature of the high pressure jet is
kept constant in a very narrow range.
The last value set is also saved after the unit is switched off in percent mode.
Operating hour meter
The cleaner is equipped with an operating hour meter.
If during normal operation the momentary operating mode button ( "°C" or "%" ) is actuated for
more then 2 seconds, the operating time of the pump is displayed for 5 seconds and afterwards the
combustion time for 5 seconds as well. Thereafter the display shows the original values again.
As long as the operating hours are displayed no further inputs on the monitor are possible.
The operating time is displayed in hours [ h ] either in the “TARGET” or in the „ACTUAL“
window. The 1000 and 100 hours are displayed in the „TARGET“ window and the 10, 1 and
1/10 hours in the “ACTUAL” window:
Pump operating time: Target-Display: P 9 9 Actual-Display: 9 9. 9 for 9 999.9h
Combustion time: Target-Display: F 9 9 Actual-Display: 9 9. 9 for 9 999.9h
e.g.: F00 27.3 = Cumbustion time 27 hours and 18 minutes
Displayed malfunctions
Display as follows Cause Action
SOLL IST
Err OFF Water temperature at
heating chamber outlet
above 147 °C
Operate appliance without heating „Heating
OFF“ until the temperature has dropped
below 147°C. Switch main switch „OFF“ and
then back „ON“ again
AUS
(OFF) E7
Appliance has not been
operated for more than 20
minutes
-> Safety cut-off
Switch main switch „OFF“ and then back
„ON“ again.
Err E2 Temperature sensor
defective Replace temperature sensor

18
Kränzle technology
Electric heating 18, 24, 36, 48 kW
The flow heaters are connected in series in modular design according to machine type
and kW output.
For water temperature at max. water output we refer to the table on pages 6/7, second
column „Heating of sucked in water“.
To be able to reach the maximum hot water output temperature it might be necessary to
reduce the operating pressure, thus reducing the water output in l/min at the same time
(see page 15).
For the temperature values we refer once more to the table on page 6/7, see „max. hot
water output“.
Flow heater

Detergent supply from the suction side:
Detergent injection on the pressur side, as you probably know it from other HP cleaners,
consume approx. 30 % of the cleaning energy, no matter if they are used or not. Due to the
water tank fitted to the Kränzle therm cleaners it is now possible to directly suck the
detergent into the pump thus reducing output loss and increasing the efficency
considerably.
The detergents are applied without having to reduce the working
pressure.
Only open the dosing valve, if the detergent sieve is placed in a
liquid. Sucked air leads to destruction of the pump seals! No
guarantee!
Keep detergent-ph-value neutral 7 - 9!
Observe specifications of detergent manufacturer!
e.g.: protective equipment, rules for waste water treatment etc.
Never suck in liquids containing solvents like varnish solvents,
petrol, oil or similar liquid! Observe specifications of detergent
manufacturers !
Seals inside the appliance are no resistant against solvents! The spray
mist of solvents is highly inflammable, explosive and poisonous.
19
Suction of detergents
1. Place detergent filter into detergent
container.
2. Dosing of detergent is done by turning
the detergent valve.
3. By closing the detergent valve the
supply of detergent is stopped.
4. After having used detergents rinse the
appliance with open spray gun and clean
water for at least 2 minutes.

20
Decommissioning - frost protection
1. Switch off the machine - main switch to „0“- position
2. Cut off the water supply
3. Open the spray gun briefly until the pressure is released
4. Apply the safety catch on the spray gun
5. Remove the water hose and spray gun
6. Drain the pump: switch on the motor for approx. 20 seconds
7. Pull the plug from the socket
8. Clean HP hose and stow away
9. Clean water filter
Frost protection
The machine is normally still partially filled with water after work has been completed.
In case the high-pressure cleaner is exposed to frost:
To protect the appliance from frost, completely empty it of water:
Disconnect the machine from the water supply and switch off the ignition. Switch on the
master switch and open the gun. The pump now presses the remaining water out of the
water tank, the pump and the continuous-flow heater.
Do not allow the machine to run for longer than a minute without water.
If the machine is not in use for lengthy frosty periods of time, it is advisable to pump
anti-freeze into the machine: For this purpose, fill the antifreeze agent into the water
tank and switch on the machine without ignition. Wait with opened gun, until the agent
comes from the nozzle.
However, the best protection against frost is to keep the machine in a place that is
safe from frost.