weedingtech Foamstream L12 User manual

USER MANUAL
ENGLISH (EU) – 29/10/2019 – ISSUE 1

L12 – User manual – English (EU) – 29/10/2019 - ISSUE 1

L12 – User manual – English (EU) – 29/10/2019 - ISSUE 1
3
TABLE OF CONTENTS
1SAFETY INFORMATION _______________ 4
1.1 OPERATOR ATTENTION ________________________________________ 4
1.2 CARBON MONOXIDE HAZARDS ___________________________________ 4
1.3 ELECTRIC SHOCK HAZARDS______________________________________ 4
1.4 FIRE AND BURN HAZARDS ______________________________________ 4
1.5 ENGINE FUEL WARNING _______________________________________ 4
2INTRODUCTION ____________________ 5
3IMPORTANT INFORMATION ___________ 5
4PRODUCT DESCRIPTION _____________ 6
5FOAMSTREAM® ____________________ 9
5.1 HOW FOAMSTREAM® KILLS WEEDS ______________________________ 9
5.2INDICATORS________________________________________________ 9
5.3 CAUTION –POISONOUS WEEDS__________________________________ 10
5.4 THE EFFECT OF THE SYSTEM ON PLANTS ____________________________ 10
6PRE-START CHECKS ________________ 12
7START PROCEDURE ________________ 13
8USING THE L12 ___________________ 14
8.1 GREEN TOWER LIGHT (AND USE OF TRIGGER) _____________________ 14
8.2 BOILER SWITCH __________________________________________ 14
8.3 THERMOSTAT ___________________________________________ 14
8.4 TACHOMETER ___________________________________________ 14
8.5 PRESSURE GAUGE ________________________________________ 14
8.6 CHANGING LANCE ________________________________________ 14
8.7 AUTOMATIC PROTECTION__________________________________ 15
9FOAMSTREAM® APPLICATION (KILLING
WEEDS)____________________________ 16
10.1 HOSE REEL ________________________________________________ 16
10.2 SPEED ___________________________________________________ 16
10.3 USE OF THE LANCE___________________________________________ 16
10.4 TREATMENT OF THICK WEEDS ___________________________________ 17
10.5 CONFIRMATION OF TREATMENT __________________________________ 17
10.6 CORRECT POSTURE __________________________________________ 17
11 SHUT-DOWN PROCEDURE ___________ 18
12 BASIC FAULT FINDING______________ 18
13 SERVICE CHECKS AND INTERVALS ____ 23
14 LOADING AND HANDLING ___________ 26
14.1 ON-VEHICLE SET UP __________________________________________ 26
15 SCHEMATICS _____________________ 27
16 WARRANTY_______________________ 30
17 PRODUCT CERTIFICATION ___________ 32

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1Safety Information
To ensure safety while operating the L12, please carefully
read the following information.
1.1 Operator Attention
WARNING
•Read and understand this user manual before operating
the L12.
•The L12 should only be used by trained operators.
•Proper PPE is to be worn at all times while operating the
L12 (see section 0).
•Major repair work should only be carried out by
professionally trained service engineers.
1.2 Carbon Monoxide Hazards
WARNING
•Boiler and engine exhaust contains poisonous carbon
monoxide gas.
•Never run the L12 indoors, even if a door or window is
open. ONLY USE IN A WELL VENTILATED AREA.
•Do not use the L12 in potentially explosive
atmospheres.
1.3 Electric Shock Hazards
WARNING
•Do not operate the L12’s electrical components with wet
hands.
•Always ensure electric cables are in good condition.
1.4 Fire and Burn Hazards
WARNING
•Petrol and diesel are explosive and flammable. Always
ensure no sparks or fire sources are present while
refueling.
•Do not refill petrol or diesel while machine is in use.
•Clean up any overflowing fuel prior to turning on the
L12.
•Never smoke while operating the L12.
•Do not touch the working components in the L12 while
in use or immediately following use. Allow sufficient
time to cool before servicing.
1.5 Engine Fuel Warning
WARNING
•NEVER PUT PETROL IN THE
DIESEL TANK

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2Introduction
Thank you for purchasing the Foamstream L12!
IT IS IMPORTANT THAT ALL OPERATORS READ AND
UNDERSTAND THESE INSTRUCTIONS BEFORE USING
THE MACHINE
Having read these instructions, the operator will:
•Understand how the L12 works
•Identify key components in the L12
•Know how to carry out pre-start and start-up
procedures
•Observe safe operating practices
•Be able to effectively operate the L12
•Be able to shut down and clean the L12
•Be able to perform basic maintenance and
troubleshooting tasks
PLEASE KEEP THESE INSTRUCTIONS IN A SAFE PLACE
FOR FUTURE REFERENCE
3Important information
The following PPE (Personal Protective Equipment) are
recommended when operating the L12:
•Eye protection is required when handling
Foamstream® concentrate
•Gloves are required as the lance assembly will get hot
•Safety Footwear suitable for working in the areas
concerned is recommended
•No specific protective clothing is required, although
use of overalls and a HI-Viz vest is suggested as best
practice.
IT IS THE RESPONSIBILITY OF THE OPERATOR TO WEAR
APPROPRIATE PPE
Never operate the machine without checking that there are
adequate supplies of clean petrol, clean diesel, clean water,
and clean Foamstream® concentrate in the appropriate
tanks.
The L12 produces VERY HOT water. This can cause serious
burns and injury if used incorrectly.
Never point the lance at people or animals as this machine
can operate at high temperatures and high pressures.
All personnel operating a L12 machine must be deemed
competent to do so and must be adequately trained. A copy
of the training record is available on demand.
Always check the L12 for any damage before use. Damaged
cables, hoses or connections must be reported immediately,
and the machine taken out of use until repairs have been
completed.
Use only genuine Weedingtech spare parts and
Foamstream® consumables. This will ensure the best
performance of your machine and maintain the warranty of
the unit.
The L12 must never be modified, safety interlocks bypassed,
or settings adjusted (unless specified in these guidance
notes) without Weedingtech’s written consent.
Ensure that the L12 is placed in an area where there is
adequate ventilation when in use.

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Ensure that the consumable liquid (foam concentrate) is not
subject to temperatures below 5 degrees centigrade at any
time.
Ensure that both the L12 and its water tank are securely
attached to the transport vehicle. It is the responsibility of
the vehicle driver to ensure that any load is secure and that
any payload restrictions are observed. You can refer to
section 14 for more information on transport.
4Product description
The L12 weed control unit consists of:
•Foamstream® L12
•Water tank
•Hose reel (20 metres)
•Weeding lance
The L12 houses a diesel-powered boiler, a petrol-powered
engine, itself connected via belt drive to a piston pump and
an alternator, a 52 litres diesel tank, and a slot for a
Foamstream® concentrate can.
Water is pumped into the boiler, and when it reaches 95
degrees centigrade, the indicator light goes green, indicating
that it is hot enough for weeding. The water flows from the
boiler (12 l/m @ 12 bar) and a venturi mixer opens to allow
Foamstream® concentrate to be injected at a ratio of
approximately 99.5 parts water to 0.5 parts concentrate. Air
is added to the water and Foamstream® mix as it exits the
lance to create the foam.
Figure 1 - L12
The L12 has been designed to require no manual input or
adjustment (See section 0 for operating details).
A safety valve and over-temperature sensor ensure that
internal pressure and temperature will not exceed 120 bar
or 120 degrees centigrade in the event of a system fault.
Filters are fitted to the diesel, water and foam systems to
ensure supplies are kept clean and free from debris. These
needs to be checked daily (see section 6). The engine has
an integrated petrol filter.
NEVER OPERATE THE L12 WITHOUT FOAMSTREAM®
CONCENTRATE

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The L12 has an open frame that allows for easy access for
maintenance and visual checks. The electrical system is
protected in the control box behind the front panel. The
transmission system links the engine to the main water
pump and the alternator. The alternator charges the battery
and provides power to the boiler.
The L12 requires a water tank, providing an unrestricted
water supply. Between any water tank and the L12, there
are two hydraulic connections (water supply, water return)
and one electrical connection (water sensor).
An automatic hose reel is located inside the unit to allow the
20 metres hose to be stowed safely when the L12 is not in
use. The hose comes off the top of the reel and is connected
to the lance via a quick-release connection.
L12 Specifications
HEIGHT (mm) 1070
WIDTH (mm) 1040
DEPTH (mm) 1140 or 2010 (with tank)
WEIGHT (kg) 300 EMPTY, 375 FULL
WATER 780 LITRES
DIESEL 52 LITRES
PETROL 6.1 LITRES
FOAMSTREAM WHOLE CAN – 25 LITRES
ENGINE OIL
1.1 LITRES SAE 10W40
PUMP OIL 0.3 LITRES SAE 10W40
FLOW RATE 12 LITRES PER MINUTE
OPERATING PRESSURE 12 BAR WEEDING LANCE;
100 BAR PRESSURE LANCE
FOAM OPERATING
TEMPERATURE
95 – 110 °C (WEEDING/HOT
MODE)
UNLOADER VALVE 100 BAR
SAFETY VALVE 120 BAR
OVER TEMPERATURE
CUT-OUT 120 °C
ENGINE (PETROL) 8.7 kW @ 3600 RPM;
RUN @ 2000 RPM (~5.3 kW)
BOILER (DIESEL) 88 kW; 12V DC
PUMP 12 L/MIN, 170BAR @ 1450
RPM; 4kW
ALTERNATOR 14V, 33A @ 1750 RPM;
RUN @ 2380 RPM
PETROL CONSUMPTION 1 L/HR
DIESEL CONSUMPTION 7 L/HR
FOAMSTREAM V4
CONSUMPTION 2.4 L/HR
FOAMSTREAM PLUS
CONSUMPTION 4 L/HR
AMBIENT OPERATING
TEMPERATURE RANGE
5 – 40 °C AIR;
5 – 60 °C WATER

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Figure 2 – Perspective view of the L12
No.
Part
Description
1 Control Panel
Includes:
-Pressure gauge (main water line,
after venturi)
-Tachometer (engine hours)
-Digital thermostat, Novus N321
connected to PT100 sensor
-2 position main switch: Cold and
Hot (boiler and alternator on)
2 Engine
Honda GX390 with speed fixed
3 Water tank
780 litres as standard
4 Lance
Not represented
5 Feet/forklift slots
Forklift can also be used from sides
6 Indicator light
Green light – illuminates when foam is
hot enough to weed
7 Hose reel
Automatic hose-reel with 20m, 3/8”,
300bar, 150C hose
8 Diesel tank
Diesel tank – 52L with low-level
sensor
9 Foamstream can
Can is placed in slot, and hose outlet
is fitted onto cap
10 Petrol tank

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5FOAMSTREAM®
5.1 How FOAMSTREAM® kills weeds
Foamstream® uses heat to kill weeds. Water is heated to
near boiling point and then mixed with the Foamstream®
concentrate to produce foam before being applied. The foam
blanket ensures that the heat is held on the plant so that the
weeds experience hot, killing temperatures for a few
seconds. Figure 6below explains and compares the process
to hot water and steam.
5.2 Indicators
The lances can apply large volumes of water and foam and
can be used to kill larger weeds. Foam cover, and hence heat
retention on weeds, is easier to achieve on prostrate plants
that are near the ground. Tall plants should be trodden
down either by foot or by using the lance outlet, to aid foam
cover and heat retention.
Figure 3 - Foamstream during treatment
Immediately after treatment, weeds will go dark green and
limp. This indicates that the machine is operating properly.
The weeds will die; this becomes more obvious within the
next one to seven days (depending on species and weather).
If weeds fail to go limp, temperatures may be too low or
treatment speed too high.
Figure 4 - Weed immediately after treatment with Foamstream
Figure 5 - Weed 24 hours after treatment with Foamstream

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If weeds go brown immediately after treatment, this could
indicate that treatment speed is too slow and excessive
heat is being applied.
Figure 6 - Foamstream's triple action
Steam / Hot Water
Kills the leaves Kills weeds
No effects on seeds Sterilises seeds
Very weak effect on roots Damages the root
In general, annual weeds are easier to kill than biennial or
perennial ones. Weed species that originate from desert or
semi-arid regions are more heat tolerant and will need a
slightly prolonged treatment period compared to other
species.
Biennial or perennial weeds usually have parts protected
against heat (especially regenerative parts under the soil,
the Rhizome). Foamstream is a contact application, it will
kill foliage, but many perennial and biennial plants will
regenerate. The number of repeat treatments required to
completely kill weeds depends on the species and their size.
5.3 Caution – poisonous weeds
Some poisonous weeds, such as common ragweed (Senecio
jacobaea) may still be attractive to animals after treatment
with Foamstream. When treating any area where animals
are likely to graze after treatment with Foamstream, check
for the presence of such potentially toxic weeds and remove
them or keep out of reach of animals that are at risk.
5.4 The effect of the system on plants
The L12 has been designed to operate in an urban
environment and control weed growth on both hard surfaces
and cultivated land. These weeds may be in, at, or around
kerbs and channels, footpath edges, driveways, boundaries,
obstacles etc.
Within these environments there are various plant species
that need to be controlled. These species may vary in type
and growth patterns depending on the specific geographic
location.
The system, through its unique operation, delivers a plant
kill based on thermal activity penetrating and breaking down
the cell structure of the plant.
With varying plants in the target area, it is important for the
operator have some knowledge of the weed types, sizes and

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ages that they are treating, as this impacts on the speed of
operation to deliver an effective kill.
For maximum efficacy, it is important that all weeds in the
target area are in contact with the hot foam. Either flatten
tall weeds i.e. by treading or use of the lance or ensure that
the stems are ‘ring barked’ (completely surrounded by a
blanket of foam). The density of the plants and foliage is a
very important aspect for the operator to be aware of, as
this also impacts on the speed of operation. It should be
noted:
•As the height and/or density of the target plants
increases, the speed of operation will be slower.
•In a situation where regular treatment of the area is
part of a maintenance programme the weeds will
generally be easier to treat as regrowth should be
reduced.
•Regular treatment also allows increased speed of
operation, as the volume of target plants to kill will be
minimised on each maintenance cycle.

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6Pre-start checks
THESE CHECKS MUST BE COMPLETED BEFORE EACH
START OF THE L12. ANY FAULTS MUST BE RECTIFIED
BEFORE THE L12 IS SWITCHED ON.
The L12 is in good condition and securely attached to
the transport vehicle
The L12 water tank is securely attached to the
transport vehicle
Water tank is full of clean water
Water filter is clean and free from debris
Air intakes (boiler and engine) are clear of debris
The lance, hose reel and hose are securely connected
and free from damage
Lance wear strips are not excessively worn
The water inlet, return hose and water level sensor
are connected
Pipe/hose routes are clear of sharp edges and hot
surfaces
There are no signs of leaks from any pipe or
connection
Petrol tank is full of clean petrol fuel
Diesel tank is full of clean diesel fuel
Diesel filter is clean and free from debris
The Foamstream® concentrate has not been subject
to temperatures below 5°C and frozen or separated
Foamstream® concentrate can is in place and
connected
Foamstream® filter is clean and free from debris
Engine engine oil level is correct
Pump oil level is correct
Engine and boiler exhaust are secure and clear of
debris and obstruction
Water feed valve is connected and in the ON (inline)
position
Air has been bled from water system
DO NOT PUT PETROL INTO THE DIESEL TANK

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7 Start procedure
Complete pre-start checks (see section 6)
•Fluids filled-up
•Main water valve open
•Filters clean
Connect the chosen lance (keep the trigger pressed)
•Weeding lance (for weeding) OR
•Power lance (for cleaning)
Start the engine by:
•Turning the key (1 on Figure 7)
•Or if cold, use the choke and turn the key (2 on
Figure 7)
If the engine won’t start, refer to the troubleshooting guide
of the manual
The pump will now be on. It may require up to a minute to
purge the lines of air before full flow is present. When the
trigger is pressed, cold foam will come out.
Turn the boiler switch to “ON” position (3 on Figure 7).
The switch will illuminate green, and the boiler will heat
up whenever the trigger is pressed.
The boiler is only active when the trigger is pulled
When the boiler switch is on the ‘ON’ position, the trigger
needs to be pulled for the boiler to heat-up.
Figure 7 - Details of the switches of the front panel
Keep the trigger pressed until tower light illuminates
green (this shouldn’t take longer than 90 seconds). This
indicates that the temperature has reached 88C and that
the machine is ready to kill weeds.
For cleaning (using power lance):
It is possible to operate in both boiler “OFF” or boiler
“ON” modes, i.e. with cold or hot water.
The temperature in boiler “ON” mode is not critical so the
state of the green light need not be considered.

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8Using the L12
Once operational, the L12 is designed to be simple to use.
8.1 GREEN TOWER LIGHT (and use of trigger)
In normal weeding operation, the green tower light will be
illuminated when the water is of sufficient temperature.
Whenever the user presses the trigger after a release, the
green light must be checked to ensure it is on. This may take
a few seconds depending on the length of release.
Figure 12 – Details of the front panel
8.2 BOILER SWITCH
When the boiler is on, the switch on the front panel
illuminates green.
The user can switch to using cold water (for cleaning with
the power lance), by turning this switch off at any point. To
cool the boiler and water emitted from the lance, keep the
trigger pressed and wait for up to 1 minute.
8.3 THERMOSTAT
The thermostat indicates the water temperature at the
outlet of the boiler, it can be switched from Celsius to
Fahrenheit.
8.4 TACHOMETER
The tachometer shows the RPM of the engine when the
engine is on, and the total hours of the engine when it is off.
8.5 PRESSURE GAUGE
The pressure gauge shows the pressure of the water in the
system after the foam venturi. This is the pressure in the
boiler, hose and lance.
8.6 CHANGING LANCE
It is possible to change the lance whether the machine is on
or off. To change the lance, release the lance trigger and
pull back the quick release. The lance will come off if pulled.
When attaching the new one, pull back the quick release,
push lance into handle, and release. Make sure it is
attached. Trigger is now ready to use with new lance.
HIGH RISK OF BURN
VERY HOT WATER CAN BE RELEASED IF THE
TRIGGER IS PRESSED WHEN NO LANCE IS
ATTACHED

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8.7 AUTOMATIC PROTECTION
The L12 automatically responds to protect itself under
certain conditions. These include:
•Low diesel – the L12 will shut down completely
•Low water – the L12 will shut down completely
•Low petrol – the L12 will shut down completely
•Low engine oil – the L12 will shut down completely
In the above conditions, whereby the machine has run low
on input fluids, the user simply has to re-fill the required
fluids and then can restart the machine as usual.
The below conditions indicate that there may be a problem
with the machine. Refer to the troubleshooting guide.
•High boiler outlet temperature (over 120C) – the L12
will shut down the boiler.
•High system water pressure (over 120 bar) – the
safety valve will open.
THE L12 SHOULD BE SWITCHED OFF AND CHECKED BY
A COMPETENT SERVICE ENGINEER IF IT DOES NOT
OPERATE AS EXPECTED.

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9Foamstream® application (killing
weeds)
To effectively control vegetation with the herbicide-free
Foamstream® system, you must co-ordinate all the different
elements that give a successful result. If one element is not
functioning properly, the desired result will not be achieved.
For effective results the Foamstream® system requires the:
•Correct volume
•Correct temperature
•Correct method
•Correct quantity of foam agent
This section looks at the speed and method of application.
10.1 Hose reel
The L12 unit is fitted with an automatic hose reel which
contains 20 m of hose as standard. The hose comes off the
top of the reel and is connected to the lance with a quick-
release trigger gun.
Only remove as much hose as is required.
Once finished, rewind the hose onto the reel neatly.
10.2 Speed
Operators will average approximately 2 - 4 kilometres per
hour, when proficient at applying the Foamstream® with the
L12. Foamstream® and the L12 are unaffected by weather,
thus ensuring overall productivity each week is consistent.
DO NOT HURRY!
If the operator moves too quickly over the vegetation, the
required volume of hot water and foam may not have
penetrated or been applied correctly. Total vegetation control
will not have been achieved.
10.3 Use of the lance
To kill weeds effectively, the lance head must be no more than
25 mm above the ground at all times. If possible, keep the
lance head in contact with the ground. While every element
of the treatment is important, the most critical aspect is to
ensure the lance head is not lifted from the targeted area.
Control of vegetation for up to 90 days will only be achieved
if the temperature measured at the lance head does not fall
below 96oC. If the lance head is more than 30mm above the
ground, a less than acceptable result may be achieved due to
the rapid temperature loss.
It is recommended the operator keeps the trigger pressed, if
possible. This maintains constant flow of hot water and foam
and ensures that they are leaving the lance at the correct
temperature.
Whenever the trigger is pressed after a release, there may be
a short period (in seconds) when the temperature needs time
to warm up. Keep the trigger pressed, and when the tower
light goes green the water has warmed up to weeding
temperature.
When moving the lance head from one treatment zone to
another, release trigger and ensure the hot foam is not
applied to sensitive plant areas.

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If there is a reduction in foam produced from the lance head,
you will not achieve the desired kill. You can check this by
lifting the lance and observing the water flow.
10.4 Treatment of thick weeds
The Foamstream system works by penetration of heat into
plant cells. In cases of dense growth and dense swards of
grass (especially species such as kikuyu), progress will be
slower as a greater volume of liquid (thermal energy) is
required to ensure a result.
10.5 Confirmation of treatment
With practice, operators will become familiar with
determining whether weeds have been treated correctly.
Broad leaf weeds will go floppy and wilt (similar to boiled
cabbage). In most cases these will go darker in colour.
Grasses: usually, grasses immediately lighten in colour and
flatten to the ground. This can be difficult to observe when
using hot foam.
Moss will go bright green.
In all cases, a distinctive smell (similar to cooking spinach)
also assists to confirm a result.
VISUAL CONFIRMATION THAT THE TREATMENT HAS BEEN
SUCCESSFUL IS ESSENTIAL.
10.6 Correct posture
When using the equipment for several hours per day it is
important that operators adopt the correct posture and
technique.
Remember it is the heat that controls the vegetation.
When treating straight stretches of roads or parks, use just
the trigger hand to guide the lance. This keeps your back
upright and not twisted and you are not encouraged to push
down with the other hand. Optional wheels are available.
Only use the other hand when changing direction or raising
the lance.
When walking, swap trigger hands every so often to rest the
muscles.
Videos are available on www.weedingtech.com for proper
treatment speeds.

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11 Shut-down procedure
Upon completion of work, or when taking a long break (more
than 10 minutes), the unit must be shut down correctly:
Switch boiler OFF
•The switch will no longer illuminate green.
(Optional - recommended) Keep lance trigger pressed
ON to cool boiler
•As the boiler cools, the main green light will go
off.
•Wait until temperature on thermostat drops
below 60C.
•Water will be flowing from lance.
Turn the engine OFF
•The whole machine turns off.
Close the valve to the main water tank
You can also shut the machine down by turning the engine
off directly, without waiting for the boiler to cool down.
12 Basic fault finding
The table below lists basic faults which can be diagnosed and
rectified by a competent L12 operator. Please refer to the
training documentation provided during training.
BEFORE BEGINNING ANY WORK ENSURE THE
WEEDINGTECH L12 HAS BEEN SWITCHED OFF.
WARNING: WATER IN THE L12 MAY BE HOT.
THE L12 SHOULD BE SWITCHED OFF AND CHECKED
BY A COMPETENT SERVICE ENGINEER IF THE
OPERATOR IS UNABLE TO DIAGNOSE AND RECTIFY A
FAULT USING THE TABLE BELOW, OR IF A FAULT
PERSISTS.

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SYMPTOM CAUSE REMEDY
1 Engine not
turning
1.1 Low battery
voltage
Check battery voltage
(should be 14v). If low,
then recharge it.
If necessary, use the
pull-start.
Battery not charging,
see 6
1.2
Loose /
damaged
wiring
Check battery
connections and wiring.
2
Engine
turning but
not firing
2.1 Cold engine Use the choke
2.2 No petrol Re-fill petrol tank
2.3 Low oil
Add oil (if low, engine is
prevented from
starting)
2.4 No diesel
Re-fill diesel tank (if
low, engine is prevented
from starting)
2.5
Water level
sensor
detecting no
water
Re-fill water tank (if
low, engine is prevented
from starting)
Ensure level sensor
connected
SYMPTOM CAUSE REMEDY
3
In COLD
mode with
engine on,
but no (or
low) flow
from lance
3.1
Main water
valve shut
Open valve
3.2
No water in
tank
Re-fill tank
3.3 Leak
Ensure all fittings are
tight
3.4
Air in water
inlet
Wait for minute while
air is bled from system.
3.5
Blocked water
filter
Clean filter
3.6 Unloader valve
set loose
Tighten unloader valve
until when using
pressure lance, there is
100bar in line and
trickle (5%) of return.
3.7 Belt is loose on
pump
Open belt housing and
check tension on belts.
Tighten if necessary.
3.8
Valves in pump
damaged
Open pump head and
reset valves
3.9
Accelerator
arm on engine
has been
moved,
reducing RPM
& flow
Adjust arm and test.
Options are: Engine
RPM using tachometer
(2000), flow rate (12),
or alternator voltage
(14V). Tighten screw.
3.10
Safety valve
set loose,
discharging
flow
Tighten safety valve
until when using
pressure lance, there is
100bar in line and then
tighten a further full
turn

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SYMPTOM CAUSE REMEDY
4
In HOT
mode with
engine on,
but boiler
does not
start
4.1 No flow, see 3 See 3
4.2 Faulty flow
switch
Check by removing and
checking not blocked.
Then turn upside down
and check resistance.
Replace if necessary.
4.3
Faulty
pressure
switch
Replace pressure
switch.
4.4
No back
pressure from
lance
Check lance is fitted
and with correct and
not worn-out nozzles.
Check that the
pressure is at least 5
bar.
Check that there are
no leaks
4.5
Loose contacts
on boiler diesel
pump
Ensure tightly
connected.
4.6 Burnt main
fuse
Replace fuse and check
all wiring for short
circuits before
restarting.
4.7
Temperature
limiter switch
(snap switch)
has been
triggered
Reset or replace and
then on restart ensure
there is full (12lpm)
flow through the boiler.
If not, see 3
4.8
Valve in diesel
pump stuck
(open or
closed)
Open solenoid valve on
diesel pump to confirm
and replace the coil for
the valves
SYMPTOM CAUSE REMEDY
5
Green light
does not
come (or
stay) on,
indicating
that the
boiler is not
reaching
temperature
5.1
Boiler not
starting, see 4
See 4
5.2
Air in diesel
lines (reducing
fuel flow rate
into pump)
Ensure all hoses and
clips are tightly fitted.
If necessary,
disconnect and force
air out of lines before
reconnecting.
5.3
Low diesel
pressure
Set the diesel pressure
to 11 bar
5.4
Coil in boiler is
covered in
thick layer of
soot
Drop a soot-breaker
into the boiler to clean
the coil. Then, measure
the emissions to help
ensure air and diesel
set correctly.
5.5
Blocked diesel
nozzle
Replace diesel nozzle in
boiler
5.6
Thermostat
setting set too
high, so light
does not
illuminate
Reset it to a nominal
temperature of 98C
5.7
Accelerator
arm on engine
has been
moved,
increasing RPM
& flow
Adjust arm and test.
Options are: Engine
RPM using tachometer
(2000), flow rate (12),
or alternator voltage
(14V). Tighten screw.
5.8
Valve stuck in
diesel pump,
see 4.8
See 4.8