Landa NG-3000 User manual

8.913-942.0-E 08/20/21
NG
Hot Water Generator
Operator’s Manual Heater Module
MODELS: NG-3000
1.103-901.0
For the Landa Dealer nearest
you, consult our web page at
www.landa.com

2 Landa NG 3000 Operator’s Manual 8.913-942.0 - E
Machine Data Label

3
Table of Contents
Machine Data Label . . . . . . . . . . . . . . . . . . . . . . . . . .2
Table of Contents . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
How To Use This Manual . . . . . . . . . . . . . . . . . . . . . 4
Safety
Introduction & Safety Information . . . . . . . . . . . . . . . 5
Important Safety Information. . . . . . . . . . . . . . . . . . .5
Operations
Component Identification . . . . . . . . . . . . . . . . . . . . . 9
Installation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .10
Operation Instruction. . . . . . . . . . . . . . . . . . . . . . . .16
General Cleaning Techniques . . . . . . . . . . . . . . . .17
Shutdown Instructions. . . . . . . . . . . . . . . . . . . . . . .18
Maintenance
Preventative Maintenance . . . . . . . . . . . . . . . . . . .19
Winterizing Procedure. . . . . . . . . . . . . . . . . . . . . . .19
High Limit Hot Water Thermostat . . . . . . . . . . . . . . 19
Heating Coils. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .19
Gas Valve Regulator. . . . . . . . . . . . . . . . . . . . . . . .20
Electrode Adjustment . . . . . . . . . . . . . . . . . . . . . . .20
Pilot Burner Adjustment . . . . . . . . . . . . . . . . . . . . .20
Pressure Relief Valve . . . . . . . . . . . . . . . . . . . . . . .20
Propane Gas
(Optional Conversion Kit) . . . . . . . . . . . . . . . . . .20
General Safety Precautions . . . . . . . . . . . . . . . . . .20
Gas Pressure Requirements. . . . . . . . . . . . . . . . . .20
Propane Cylinder Capacity . . . . . . . . . . . . . . . . . . .21
Burner Features . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
Burner Troubleshooting . . . . . . . . . . . . . . . . . . . . .22
Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
Parts
Landa NG . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
Landa NG 3000 Operator’s Manual 8.913-942.0 - E

4
How To Use This Manual
This manual contains the following sections:
• How to Use This Manual
• Safety
• Operations
• Maintenance
• Parts List
The HOW TO USE THIS MANUAL section will tell you
how to find important information for ordering correct
repair parts.
Parts may be ordered from authorized dealers. When
placing an order for parts, the machine model and
machine serial number are important. Refer to the
MACHINE DATA box which is filled out during the
installation of your machine. The MACHINE DATA box
is located on the inside of the front cover of this manual.
The model and serial number of your machine is
located on the back of the machine.
The SAFETY section contains important information
regarding hazardous or unsafe practices of the
machine. Levels of hazards are identified that could
result in product damage, personal injury, or severe
injury resulting in death.
The OPERATIONS section is to familiarize the operator
with the operation and function of the machine.
The MAINTENANCE section contains preventive main-
tenance to keep the machine and its components in
good working condition. They are listed in this general
order:
• Winterizing Procedure
• High Limit Hot Water Thermostat
• Heating Coils
• Gas Valve Regulator
• Electrode Adjustment
• Pilot Burner Adjustment
• Pressure Relief Valve
• Propane Gas (Optional Conversion Kit)
• General Safety Precautions
• Gas Pressure Requirements
• Propane Cylinder Capacity
• Burner Features
• Burner Troubleshooting
• Troubleshooting
The PARTS LIST section contains assembled parts
illustrations and corresponding parts list. The parts lists
include a number of columns of information:
•REF – column refers to the reference number
on the parts illustration.
•PART NO. – column lists the part number for
the part.
•QTY – column lists the quantity of the part used
in that area of the machine.
•DESCRIPTION – column is a brief description
of the part.
•NOTES – column for information not noted by
the other columns.
NOTE: If a service or option kit is installed on your
machine, be sure to keep the KIT INSTRUCTIONS
which came with the kit. It contains replacement parts
numbers needed for ordering future parts.
NOTE: The manual part number is located on the
lower right corner of the front cover.
Model:
Date of Purchase:
Serial Number:
Dealer:
Address:
Phone Number:
Sales Representative:
Landa NG 3000 Operator’s Manual 8.913-942.0 - E

5
Safety
Introduction & Safety Information
Thank you for purchasing a Landa Heater Module.
This manual covers the operation and maintenance of
the NG-3000 heater module. All information in this
manual is based on the latest product information
available at the time of printing.
Landa, Inc. reserves the right to make changes at any
time without incurring any obligation.
Owner/User Responsibility:
The owner and/or user must have an understanding of
the manufacturer’s operating instructions and warnings
before using this pressure washer. Warning information
should be emphasized and understood. If the operator
is not fluent in English, the manufacturer’s instructions
and warnings shall be read to and discussed with the
operator in the operator’s native language by the
purchaser/owner, making sure that the operator
comprehends its contents.
Owner and/or user must study and maintain for future
reference the manufacturers’ instructions.
The operator must know how to stop the machine
quickly and understand the operation of all controls.
Never permit anyone to operate the engine without
proper instructions.
SAVE THESE INSTRUCTIONS
This manual should be considered a permanent part of
the machine and should remain with it if machine is
resold.
When ordering parts, please specify model and
serial number. Use only identical replacement parts.
This machine is to be used only by trained
operators.
Important Safety Information
NOTE: This heater module NG-3000 is designed
for connection to a pressure washer (not
included). Read and follow WARNING and
operating instructions of pressure washer
connected to model NG-3000.
WARNING: To reduce the risk of
injury, read operating instructions
carefully before using.
AVERTISSEMENT: Pour réduire le
risque de blessures, lire attentive-
ment les instructions de
fonctionnement avant l'utilisation.
1. Read the owner's manual thor-
oughly. Failure to follow instruc-
tions could cause malfunction of the machine and
result in death, serious bodily injury and/or property
damage.
2. Know how to stop the machine and bleed pressure
quickly. Be thoroughly familiar with the controls.
3. Stay alert — watch what you are doing.
4. Do not replace LP tank while machine is running.
5. All installations must comply with local codes.
Contact your electrician, plumber, utility company
or the selling dealer for specific details. If your
machine is rated 250 volts or less, single phase a
ground fault circuit interrupter (GFCI) will be
provided. If rated more than 250 volts, or more
than single phase this product should only be
connected to a power supply protected by a GFCI.
Landa NG 3000 Operator’s Manual 8.913-942.0 - E
WARNING
READ OPERATOR’S
MANUAL THOROUGHLY
PRIOR TO USE.
OPERATIONS
SAFETY
MAINTENANCE

6
Safety
WARNING: Must be plugged into properly wired
three hole grounded outlet that accommodates
plug on power cord. Failure to comply could result
in electrical shock.
AVERTISSEMENT: Doit être raccordé dans une
sortie à trois trous mise à la masse et correctement
câblée qui peut accueillir une fiche sur un cordon
d'alimentation. Le non-respect de cette consigne
pourrait causer un choc électrique.
DANGER: Improper connection of the equipment-
grounding conductor can result in a risk of electro-
cution. Check with a qualified electrician or service
personnel if you are in doubt as to whether the
outlet is properly grounded. Do not modify the plug
provided with the product - if it will not fit the outlet,
have a proper outlet installed by a qualified electri-
cian. Do not use any type of adapter with this
product.
DANGER: Une mauvaise connexion du conducteur
de terre de l'équipement peut entraîner un risque
d'électrocution. Vérifier auprès d'un électricien
qualifié ou du personnel d'entretien si vous avez
des doutes quant à savoir si lasortie est correcte-
ment mise à la masse. NE PAS modifier la fiche
fournie avec le produit - si elle n'entre pas dans la
sortie, faire installer une sortie appropriée par un
électricien qualifié.
WARNING: Keep wand, hose, and
water spray away from electric
wiring or fatal electric shock may
result.
AVERTISSEMENT: Garder la lance,
le boyau et le jet d'eau à l'écart de
tout câblage électrique ou des
chocs électriques mortels pour-
raient survenir. Lire l'étiquette
d'avertissement sur le cordon élec-
trique
6. To protect the operator from electrical shock, the
machine must be electrically grounded. It is the
responsibility of the owner to connect this machine
to a UL grounded receptacle of proper voltage and
amperage ratings. Do not spray water on or near
electrical components. Do not touch machine with
wet hands or while standing in water. Always
disconnect power before servicing.
WARNING: Flammable liquids can create fumes
which can ignite, causing property damage or
severe injury.
AVERTISSEMENT: Des liquides inflammables
peuvent produire des vapeurs qui peuvent
s'enflammer, causant ainsi des dommages à la
propriété ou des blessures graves.
WARNING: Risk of explosion —
Operate only where open flame or
torch is permitted.
AVERTISSEMENT: Risque d'explo-
sion - Utiliser uniquement dans
des endroits où l'utilisation d'une
flamme nue ou d'une torche est
permise.
WARNING: Risk of fire — Do not
change tanks when the product is
operating or still hot.
AVERTISSEMENT: Risque
d'incendie - Ne pas changer les
réservoirs pendant que le produit
est en marche ou encore chaud
WARNING: Use vapor fuel only.
AVERTISSEMENT: Utiliser des vapeurs de
carburant seulement
7. Oil burning appliances shall be installed only in
locations where combustible dusts and flammable
gases or vapors are not present. Do not store or
use gasoline near this machine.
8. Keep operating area clear of all persons.
WARNING: High pressure spray
can cause paint chips or other
particles to become airborne and
fly at high speeds. To avoid
personal injury, eye, face, hand
and foot safety devices must be
worn.
AVERTISSEMENT: Un jet haute
pression peut écailler la peinture
ou provoquer l'émission d'autres
particules dans l'air et leur projection à hautes
vitesses. Pour éviter les lésions corporelles, une
protection des yeux, du visage, des mains et des
pieds doit être portée lors de l'utilisation de cet
équipement
9. Always wear properly rated eye protection such as
safety goggles or face shield while spraying.
(Safety glasses do not provide full protection.)
Landa NG 3000 Operator’s Manual 8.913-942.0 - E
KEEP WATER
SPRAY AWAY FROM
ELECTRICAL WIRING.
WARNING
WARNING
RISK OF EXPLOSION:
IF GAS SMELL
PRESENT TURN OFF
SUPPLY
WARNING
USE PROTECTIVE
EYE WEAR
AND CLOTHING
WHEN OPERATING
THIS EQUIPMENT.
WARNING
RISK OF FIRE.
DO NOT ADD FUEL
WHEN OPERATING
MACHINE.

7
Safety
WARNING: Pressure washer
connected to the NG-3000 may
exceeds 85 db appropriate ear
protection must be worn.
AVERTISSEMENT: La laveuse à
pression connectée au NG-3000
peut excéder 85 dB; une
protection de l'ouïe appropriée
doit être portée.
CAUTION: Hot discharge fluid. Do
not touch or direct discharge
stream at persons or animals or
severe injury or death will result.
ATTENTION: Liquide de décharge
chaud. Ne pas toucher ou
décharger directement le jet vers
des personnes ou des animaux,
car cela risquerait de causer des
blessures graves ou même la mort.
WARNING: This machine produces hot water and
must have insulated components attached to
protect the operator.
AVERTISSEMENT: Cette machine produit de l'eau
chaude et doit comporter des composants isolés
attachés pour protéger l'opérateur
WARNING: Risk of injury. Hot
surfaces can cause burns. Use
only designated gripping areas of
spray gun and wand. Do not place
hands or feet on non-insulated
areas of the pressure washer.
AVERTISSEMENT: Risque de
blessures. Les surfaces chaudes
peuvent causer des brûlures.
Utiliser uniquement les zones de prise désignées
du pistolet pulvérisateur et de la lance. Ne pas
placer les mains ou les pieds sur des endroits non
isolés de la laveuse à pression.
10. To reduce the risk of injury, close supervision is
necessary when a machine is used near children.
Do not allow children to operate the pressure
washer. This machine must be attended during
operation. Stay alert - watch what you are
doing. Keep operating area clear of all persons.
WARNING: Grip cleaning wand
securely with both hands before
starting. Failure to do this could
result in injury from a whipping
wand.
AVERTISSEMENT: Agripper la
lance de nettoyage avec les deux
mains avant de commencer. Le
non-respect de cette consigne
pourrait mener à des blessures
causées par le mouvement violent de la lance
11. Never make adjustments on machine while in
operation.
12. Be certain all quick coupler fittings are secured
before using pressure washer.
WARNING: High pressure
developed from the pressure
washer connected to the NG-3000
will cause personal injury or
equipment damage. Keep clear of
nozzle. Use caution when oper-
ating. Do not direct discharge
stream at people or animals, or
severe injury or death will result.
AVERTISSEMENT: La haute
pression générée par la laveuse à pression
raccordée au NG-3000 causera des lésions
corporelles ou des dommages à l'équipement. Se
tenir à l'écart de la buse. Faire preuve de prudence
lors de l'utilisation Ne pas décharger directement
le jet vers des personnes ou des animaux, car cela
risquerait de causer des blessures graves ou
même la mort
WARNING: Protect machine from
freezing.
AVERTISSEMENT: Protéger la
machine contre le gel.
13. To keep machine in best
operating conditions, it is
important you protect machine
from freezing. Failure to protect
machine from freezing could
cause malfunction of the machine and result in
death, serious bodily injury, and/or property
damage. Follow storage instructions specified in
this manual.
14. Inlet water must be clean fresh water and no hotter
then 90°F.
Landa NG 3000 Operator’s Manual 8.913-942.0 - E
WARNING
RISK OF INJURY.
HOT SURFACES
CAN CAUSE BURNS
WARNING
TRIGGER GUN KICKS
BACK — HOLD WITH
BOTH HANDS
WARNING
RISK OF INJECTION
OR SEVERE INJURY
TO PERSONS. KEEP
CLEAR OF NOZZLE.
WARNING
PROCTECT FROM
FREEZING
CAUTION
HOT DISCHARGE FLUID:
DO NOT TOUCH OR
DIRECT DISCHARGE
STEAM AT PERSONS.
WARNING
EAR PROTECTION
MUST BE WORN

8
Safety
DANGER: Risk of asphyxiation.
Use this product only in a well
ventilated area.
DANGER: Risque d'asphyxie.
Utiliser ce produit uniquement
dans un endroit bien ventilé.
15. Avoid installing machines in
small areas or near exhaust
fans. Adequate oxygen is
needed for combustion or dangerous carbon
monoxide will result.
16. Manufacturer will not be liable for any changes
made to our standard machines or any compo-
nents not purchased from us.
17. The best insurance against an accident is precau-
tion and knowledge of the machine.
WARNING: Be extremely careful
when using a ladder, scaffolding
or any other relatively unstable
location. The cleaning area should
have adequate slopes and
drainage to reduce the possibility
of a fall due to slippery surfaces.
AVERTISSEMENT: Faire preuve
d'une extrême prudence au
moment d'utiliser une échelle, des
échafaudages ou toute autre surface relativement
instable. La zone de nettoyage doit avoir une pente
et un drainage adéquats pour réduire la possibilité
d'une chute due à une surface glissante
18. Do not overreach or stand on unstable support.
Keep good footing and balance at all times
19. Do not operate this machine when fatigued or
under the influence of alcohol, prescription medica-
tions, or drugs.
20. Do not replace LP tank while machine is running.
Serious injury could result.
WARNING: Use vapor fuel only.
AVERTISSEMENT: Utiliser des vapeurs de
carburant seulement
21. The LP models are designed to run on vapor
propane fuel. Do not use liquid fuel. Have a
qualified serviceman install and service your equip-
ment.
22. Never expose a spark or flame where there may be
unburned gas present.
CAUTION: This product incorporates parts that
produce sparks and therefore when located in a
garage, it should be in a room or enclosure
provided for the purpose, or should be 18” or more
above the floor. Install on noncombustible flooring
and have a 36” minimum working clearance.
ATTENTION: Cet équipement comprend des pièces
qui produisent des étincelles et, par conséquent,
lorsque l'appareil se trouve dans un garage, il
devrait se trouver dans une pièce ou une enceinte
prévue à cet effet ou devrait être installé à XX cm
(XX po) ou plus du sol
23. When making repairs disconnect from electrical
source and shut off gas valve.
24. Install this machine on non combustible flooring.
25. Do not allow acids, caustic or abrasive fluids to
pass through the pump.
26. Never run pump dry or leave spray gun closed
longer than 1-2 minutes.
WARNING: If connection is made
to potable water supply, the
system shall be protected against
back flow.
AVERTISSEMENT: Si une
connexion est établie avec un
approvisionnement en eau
potable, un dispositif de
protection contre le retour d'eau
doit être fourni.
WARNING: Do not spray machine
or any people, animals or electrical
parts.
AVERTISSEMENT: Ne pas
vaporiser sur la machine ou les
gens, les animaux ou les pièces
électriques
Follow the maintenance instructions
specified in the manual.
Example Of Down Draft Diverter
For Gas Fired Machines
Landa NG 3000 Operator’s Manual 8.913-942.0 - E
WARNING
DO NOT SPRAY
MACHINE OR ANY
PEOPLE, ANIMALS OR
ELECTRICAL PARTS.
WARNING
IF CONNECTED
TO A POTABLE
WATER SUPPLY,
PROTECT AGAINST
BACKFLOW.
WARNING
RISK OF INJURY
FROM FALLS WHEN
USING LADDER.
DANGER
RISK OF
ASPHYXIATION.
USE THIS PRODUCT
ONLY IN A WELL
VENTILATED AREA.

9
Operations
Component Identification
Landa NG 3000 Operator’s Manual 8.913-942.0 - E
Inlet GHF
Connector
Gas Line
Connection
Discharge
Coupling
High Pressure Nozzle
(not included)
Electric Cold Water
Pressure Washer
(not included)
Vent according to
local codes
(not included)
Burner
Switch
Spray Gun
(not included)
High Pressure Hose
(Not included)
Use with Electric Cold
Water Pressure Washer
ONLY
Flow
Switch
9 ft. High
Pressure Hose
(from Pressure
Washer)
Inlet
Connector
9 ft. High
Pressure Hose

10
Operations
Installation
Place machine in a convenient location providing
ample support, drainage and room for maintenance.
Location
The location should protect the machine from
damaging environmental conditions, such as wind, rain
and freezing.
1. The cleaner should be run on a level surface where
it is not readily influenced by outside sources such
as strong winds, freezing temperatures, rain, etc.
The machine should be located considering acces-
sibility for the replacing of components, adjust-
ments and maintenance. Normal precautions
should be taken by the operator to prevent excess
moisture from reaching this power machine or
electrical controls.
2. It is recommended that a partition be made
between the wash area and the NG to prevent
direct spray from the spray gun from coming in
contact with the NG. Excess moisture reaching the
NG’s gas valve will reduce the life of the gas valve
and may cause electrical shorts.
3. During installation, beware of poorly ventilated
locations or areas where exhaust fans may cause
an insufficient supply of oxygen. Sufficient combus-
tion 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 this
machine in a poorly ventilated area, outside fresh
air may have to be piped to the burner and a fan
installed to bring air into the machine.
4. Do not locate near any combustible material. Keep
all flammable material at least 20 feet away. Allow
enough space for servicing. Local code will require
certain distances from floor and walls. (Two feet
away should be adequate).
WARNING: Avoid small areas or near exhaust fans.
AVERTISSEMENT: Éviter les petites superficies ou
les surfaces à proximité des ventilateurs
d'extraction.
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.
The gas pressure coming out of the regulator and going
to the burner ring has been factory set for elevations of
0 to 2000 ft. Altitudes greater than 2000 ft will require
adjustments to the gas manifold pressures. Consult
your local service dealer for high altitude adjustments.
In Canada, certification for installation at altitudes over
4500 feet above sea level is the jurisdiction of local
authorities. You should not readjust the burner ring gas
pressure. If you replace your gas valve, you will need to
adjust the new valve. Refer to your machine’s specifi-
cation plate for the correct pressure setting. Follow the
installation and adjustment instructions provided with
your replacement valve.
NOTE: Air for combustion and ventilation along with
exhaust flue sizing must conform to methods outlined in
current American Standard (ANSI-Z223.1) National
Fuel Gas Code or National Standard of Canada CSA-
149.1 and CSA-149.2 “Installation Code for Gas
Burning Appliances”.
Electrical
The heating module runs on a self-generating millivolt
thermopile and does not require electrical AC power.
The pressure washer you attach to this heating module
must be electrically grounded in accordance to local
codes. Check for proper power supply using a volt
meter; check the serial plate and specifications for the
correct requirements.
Gas Piping
All piping must comply with local codes and ordinances
of the National Fuel Gas Code: A sediment trap or drip
leg must be installed in the supply line to the burner.
A union shall be installed in the gas line adjacent to and
upstream from the control manifold and downstream
from the manual main shut-off valve.
Drip Leg
Landa NG 3000 Operator’s Manual 8.913-942.0 - E
Sediment trap (drip leg) must be
installed in the supply line
Drop
Gas Valve
Rise
1/4 in. Test Port
(6 in.-14 W.C. or 1/2 PSIG)
Horizontal
3 in. (76.2 mm)
MINIMUM
3 in. (76.2 mm)
MINIMUM
Gas
Valve

11
Operations
Union Location
A 1/8" N.P.T. plugged tapping accessible for test gauge
connection shall be installed immediately upstream of
the gas supply connection for the purpose of deter-
mining 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.
A manual shut-off valve shall be installed in the gas
supply line external to the appliance. See Figure 2. The
gas line should be a separate supply direct from the
meter to the burner. It is recommended that new pipe
be used and located so that a minimum amount of work
will be required in future servicing. The piping should be
so installed as to be durable, substantial and gas tight.
It should be clear and free from cutting burrs and
defects in structure of threading. Cast iron fittings or
aluminum tubing should not be used for the main gas
circuit. Joint compounds (pipe dope) should be used
sparingly on male threads only and be approved for all
gases.
Propane Gas
The following pipe and stack sizes are just recommen-
dations. Always consult a local plumber and venting
contractor for local codes and regulations during instal-
lation.
The following tables are maximum capacity of final
stage pipe in thousands of Btu/hr of commercial
propane
From first stage regulator (at tank) to second stage
regulator
The chart below is based on incoming gas pressure of
10 PSI and a pressure drop of 1 PSI. Numbers are for
straight schedule 40 pipe; fittings further reduce
capacity.
Length of Pipe
(ft.)
Iron Pipe Size
1/2" 3/4"
10 3339 6982
20 2295 4799
30 1843 3854
40 1577 3298
50 1398 2923
60 1267 2649
70 1165 2437
80 1084 2267
90 1017 2127
100 961 2009
150 772 1613
200 660 1381
250 585 1224
300 530 1109
350 488 1020
400 454 949
450 426 890
500 402 841
Landa NG 3000 Operator’s Manual 8.913-942.0 - E
Location of union and drip
leg for connecting conver
sion
burner to house piping
Floor Level
1/8 in. N.P.T. Plugged
Pressure Gauge Port
Flow
Union
Control Manifold
Manual
Shut-off
Valve
Tee
3 in. (76.2 mm)
MINIMUM
Pipe Cap

12
Operations
From second stage regulator to machine.
This is based on incoming gas pressure of 11” WC and
a pressure drop of .5” WC. Numbers are for straight
schedule 40 pipe; fittings further reduce capacity.
The chart below is based on gas pressure in the range
0-.5 PSI, specific gravity of .6, and pressure loss of
.5WC. Numbers are for straight schedule 40 pipe;
fittings further reduce capacity.
Venting
If the machine is used indoors, regulations or ventila-
tion concerns may call for a chimney or furnace pipe.
When venting, if the heating module is to be in an
enclosed area with a chimney on it, be sure the
chimney is the same size as the stack on the module.
Poor draft will cause the machine to soot and not
operate efficiently. When installing, keep in mind that
the machine should be positioned in such a manner
that the stack will be as straight as possible and
protrude through the roof of the building at a proper
location and at sufficient height to eliminate downdraft.
The chimney should be installed with a down draft
diverter.
Input - BTU Per Hour Draft Hood & Flue Pipe Size
250,000 - 320,000 8 inch
320,000 - 410,000 9 inch
NOTE: If the flue pipe exceeds 10 ft. in length, or
contains more than two elbows, use next size larger
pipe and draft hood, or burner will not ignite. No
movable flue pipe damper should be used on any
installation.
Draft Diverter
The draft diverter shall be installed at least three
(3) feet above the heating coil. The diverter serves to
sever the chimney effect created in all sections of
furnace pipe positioned below to enhance the draft
through the burner. It also helps prevent freezing of the
coil due to wind chill factors.
Draft Diverter (Optional)
Length
of Pipe
(ft.)
Iron Pipe Size
3/4” 1” 1 1/
4”
1 1/
2”
2”
10 360 680 1400 2100 3950
20 250 465 950 1460 2750
30 200 375 770 1180 2200
40 170 320 660 990 1900
50 151 285 580 900 1680
60 138 260 530 810 1520
70 125 240 490 750 1400
80 118 220 460 690 1300
90 110 205 430 650 1220
100 103 195 400 620 1150
150 84 160 325 500 950
200 72 135 280 430 800
Landa NG 3000 Operator’s Manual 8.913-942.0 - E
Length of
pipe (ft.)
Iron Pipe Size
1/2” 3/4” 1”
10 291 608 1146
20 200 418 788
30 161 336 632
40 137 287 541
50 122 255 480
60 110 231 435
70 102 212 400
80 94 198 372
90 87 185 349
100 84 175 330

13
Operations
When a room is of unusually tight construction and has
a kitchen and/or bathroom ventilating fan, which may
be used for exhausting air to outdoors - or has a vented
fireplace - it is recommended that combustion air be
supplied to the enclosed room through intakes
extending to the outside of the building and terminating
in down turned fittings, suitably arranged to prevent
obstruction from snow or rain, and including a
protecting screen not smaller than 1/4 inch mesh.
Illustration showing air openings necessary to supply
air for combustion when heating appliance is installed
in an enclosed room.
Ventilating air openings - 1 square inch for each
1000 BTU per hour input.
Water Source
The heating module was designed to accept a cold
water electric pressure washer. The water source for
the attached pressure washer should be supplied by a
5/8” I.D. garden hose with a city water pressure of not
less than 30 psi. If the water supply is inadequate, or if
the garden hose is kinked, the machine will run very
rough and the burner will not fire.
Water Connection
Connect the 9’ high pressure hose by pulling the
coupler collar back and then inserting it onto the
discharge nipple. Secure it by pushing the collar
forward. NOTE: If quick couplers do not match
pressure washer couplers, replace with free flow
couplers and nipples.
Attach the wand, trigger spray gun, and high pressure
nozzle as recommended by your pressure washer
manufacturer. Secure the pressure washer hose from
your electric cold water pressure washer to the
discharge coupling.
Inspection and Testing Gas Piping
The building structure should not be weakened by
installing the gas piping. The piping should not be
supported by other piping, but should be firmly
supported with gas hooks, straps, bands or hangers.
Butt or lap welded pipe should not be run through or in
an air duct or clothes chute.
Before turning gas under pressure into piping, close all
openings from which gas can escape. Check system
for leaks immediately after turning gas on. This can be
done by watching the 1/2 cubic foot test dial and
allowing 5 minutes to show any movement, or by
soaping each pipe connection and watching for
bubbles. If a leak is found, make the necessary repairs
and repeat the above test.
Defective pipes or fittings should be replaced and not
repaired. Never use a flame or fire in any form to locate
gas leaks; use a soap solution.
After the piping and meter have been checked
completely, purge the system of air. DO NOT bleed the
air inside an enclosed room.
The appliance and its individual shut-off valve must be
disconnected from the gas supply piping system during
the pressure testing of that system at test pressure in
excess of 1/2 psig or damage to the gas valve will
occur.
Gas Pressure
The ideal incoming gas pressure is 11 w.c.i. (minimum
6 w.c.i., maximum 14 w.c.i. or 1/2 psig). The correct
operating manifold pressure for natural gas is 3.5 w.c.i.
The operating manifold pressure for propane gas is 11
w.c.i. By adjusting the gas valve pressure regulator
between 3 and 4 w.c.i. for the NG and 6 and 11 w.c.i. for
the LPG, a side range can be achieved.
If the desired input rating cannot be obtained within the
above manifold pressure adjusting range, the next size
larger or smaller burner orifice should be used.
Landa NG 3000 Operator’s Manual 8.913-942.0 - E

14
Operations
Warnings & Check List
1. Installation or servicing of gas
appliances and controls must
only be performed by qualified
personnel. After installation or
servicing, test manual valve,
operating valves, pressure regu-
lation, and automatic shut-off
valve for proper operation.
2. Install in a suitable dry location.
The machine must be located in
an area properly protected from the weather.
3. Shut off gas and electricity before starting installa-
tion or service. Turn back on to test or operate.
4. DO NOT connect appliances before pressure
testing the gas piping. Damage to gas valve may
result. (6 - 14 w.c.i. or 1/2 psig)
5. DO NOT insert any object other than suitable pipe
or tubing in the inlet or outlet of the gas valve.
Internal damage may occur and result in a
hazardous condition.
6. DO NOT grip gas valve body with a pipe wrench or
vise. Damage may result causing gas leakage.
Use inlet or outlet bosses or a special body
wrench.
7. DO NOT short the gas valve terminals.
8. DO NOT allow any flame to impinge on the
regulator vent tubing if supplied. It may clog and
cause gas valve malfunction.
9. DO NOT use the gas cock to adjust gas flow.
10. If main burner fails to shut off, turn off
gas supply.
11. Keep all combustible materials away from gas
appliances. DO NOT allow lint or dust to collect in
burner area.
12. Dials must only be operated by hand. Never use
pliers, wrenches or other tools to turn dials.
13. After installation or servicing, test for leaks with a
soap solution. With the main burner on, coat pipe
and tubing joints, gaskets, etc. Bubbles indicate
leaks.
14. If the machine is installed in an enclosed room,
care should be taken to ensure that an adequate
supply of air is available for combustion and venti-
lation. (1 sq. inch per 1000 BTU)
FOR YOUR SAFETY READ BEFORE
LIGHTING
If you do not follow these instructions exactly, a fire
or explosion may result causing property damage,
personal injury or loss of life.
A. This appliance has a pilot which must be lighted
by hand. When lighting the pilot, follow these
instructions exactly.
B. Before lighting, smell all around the appliance
area for gas. Be sure to smell next to the floor
because some gas is heavier than air and will settle
on the floor.
FOR YOUR SAFETY
“WHAT TO DO IF YOU SMELL GAS”
• • Do not try to light any appliance
• • Do not touch any electrical switch, do not
use any phone in your building.
• • Immediately call your gas supplier from a
neighbor’s phone.Follow the gas supplier’s
instructions.
• • If you cannot reach your gas supplier, call
the fire department.
C. Use only your hand to push in or turn the gas
control knob. Never use tools. If the knob will not
push in or turn by hand, don’t try to repair it; call a
qualified service technician. Forced or attempted
repair may result in a fire or explosion.
D. Do not use this appliance if any part has been
under water. Immediately call a qualified service
technician to inspect the appliance and to replace
any part of the control system and any gas control
which has been under water.
Landa NG 3000 Operator’s Manual 8.913-942.0 - E
WARNING
READ OPERATOR’S
MANUAL THOROUGHLY
PRIOR TO USE.
OPERATIONS
SAFETY
MAINTENANCE

15
Operations
CAUTION! If “NO” has been checked on any of the
above questions, do not operate this machine.
ATTENTION: Si la réponse à l'une des questions ci-
dessus est « NON », ne pas utiliser la machine.
Installation Checklist YES NO
Has gas supply been inspected by an
authorized contractor to meet local
codes?
Is machine protected from downdraft
and excessive wind?
Is machine shielded from moisture or
water spray?
Is the voltage correct and are the circuit
breaker and supply cord adequate
according to specifications and serial
plate notation?
Is the machine electrically grounded?
Is there ample water supply?
Have all flammable liquids or gases
been removed from installation
location?
Is there adequate gas supply for the
BTU rating of the burner?
Is incoming gas supply pressure to the
machine between 6” - 14” water column
inches or 1/2 PSIG?
Has the proper gas regulator been
installed for pressure and volume?
Is the machine properly vented to allow
adequate air flow?
Are the propane tanks large enough,
according to rating of the machine, to
prevent freezing?
Have gas lines been checked for gas
leaks?
Have gas lines been checked with local
codes?
Have all operators using this machine
been instructed properly & have they
read the manual?
Has the machine been installed
according to operator’s manual instruc-
tions?
Landa NG 3000 Operator’s Manual 8.913-942.0 - E

16
Operations
Operation Instruction
STEP 1: Failure to read operation
and warning instructions may result
in personal injury or property
damage. Turn all switches off and
review installation and operating
instructions for attached pressure
washer before connecting the
water supply hose from the
pressure washer to the inlet
connector on the NG and turning
the water on. Check for water leaks
and tighten as needed.
STEP 2: Connect the power cord
from the attached electric cold
water pressure washer to the
proper electrical outlet according to
the specifications and serial plate
information from the manufacturer.
STEP 3: Review the installation
instructions and then turn on the
main gas supply.
Partially depress and turn control
knob to the “OFF” position.
STEP 4: Wait five minutes to allow
gas which may have accumulated
in the main burner compartment to
escape then turn control knob to
“PILOT” position.
Landa NG 3000 Operator’s Manual 8.913-942.0 - E
Water Supply
Hose from
Pressure Washer
Inlet
Connector
Control
Knob
Red
Ignitor
STEP 5: Depress control knob all the way and hold it in.
After five (5) seconds, depress the red ignitor until you
hear a loud click. Repeat 3 or 4 times if necessary until
pilot is lit. If pilot does not remain lit, repeat the
operation allowing a longer period of time before
releasing the control knob. NOTE: Burner may not
ignite on initial start up until air has been emitted from
the gas supply lines.
After the pilot lights, continue to hold the control knob
down for about one (1) minute before releasing.
NOTE: Sufficient time must be allowed for a proper size
pilot flame to heat the thermocouple and hold the safety
magnet in a locked-up position. Also, time must be
allowed for air to escape from the lines during the first
operation.
Release control knob from pilot position and turn to full
or “ON” position.
STEP 6: Start the attached pressure washer according
to the manufacturer’s instructions. Pull the trigger on
the spray gun allowing cold water to flow.
STEP 7: For hot water, push the burner switch to the
“ON” position and pull the trigger on the spray gun, to
activate the gas control valve.
Burner
Switch

17
Operations
General Cleaning Techniques
Cleaning Techniques
Pre-rinse cleaning surface with fresh water. Place
detergent suction tube directly into cleaning solution
and apply to surface at low pressure (for best results,
limit your work area to sections approximately 6 feet
square and always apply detergent from bottom to top).
Allow detergent to remain on surface 1-3 minutes. Do
not allow detergent to dry on surface. If surface
appears to be drying, simply wet down surface with
fresh water. If needed, use brush to remove stubborn
dirt. Rinse at high pressure from top to bottom in an
even sweeping motion keeping the spray nozzle
approximately 1 foot from cleaning surface. Use over-
lapping strokes as you clean and rinse any surface. For
best surface cleaning action spray at a slight angle.
Recommendations:
• Before cleaning any surface, an inconspicuous
area should be cleaned to test spray pattern
and distance for maximum cleaning results.
• If painted surfaces are peeling or chipping, use
extreme caution as pressure washer may
remove the loose paint from the surface.
• Keep the spray nozzle a safe distance from the
surface you plan to clean. High pressure wash
a small area, then check the surface for
damage. If no damage is found, continue to
pressure washing.
CAUTION - Never use:
• Bleach, chlorine products and other corrosive
chemicals
• Liquids containing solvents (i.e., paint thinner,
gasoline, oils)
• Tri-sodium phosphate products
• Ammonia products or acid-based products
ATTENTION: Ne jamais utiliser :
• Eau de Javel, produits à base de chlore et
autres produits chimiques corrosifs
• Liquides contenant des solvants (c.-à-d. diluant
à peinture, essence, huiles, etc.)
• Produits à base de tripolyphosphate de sodium
• Ammoniac ou produits à base d'acide
These chemicals will harm the machine and will
damage the surface being cleaned.
Rinsing
It will take a few seconds for the detergent to clear.
Apply safety latch to spray gun. Select and install
desired high pressure nozzle.
NOTE: You can also stop detergent from flowing by
removing detergent siphon tube from bottle.
Landa NG 3000 Operator’s Manual 8.913-942.0 - E

18
Operations
Shutdown Instructions
STEP 1: Turn the burner switch off.
If detergent was run through the
heating module, flush with fresh
water, open spray gun and allow
burner to cool. Otherwise coil
damage will result.
STEP 4: Turn water off. Drain water
from coil to prevent freezing.
STEP 2: Rinse detergent with fresh
water if attached pressure washer
is able to apply detergent.
STEP 3: After water has cooled,
turn the attached pressure washer
off. If the machine is going to be off
for an extended period of time, put
the control knob on the gas valve
into the “OFF” position.
Landa NG 3000 Operator’s Manual 8.913-942.0 - E
Burner
Switch
Control
Knob

19
Maintenance
Preventative Maintenance
1. Follow Winterizing Procedures to prevent freeze
damage to the pump and coils.
2. Always neutralize and flush detergent from system
after use.
3. If water is known to be high in mineral content, use
a water softener in your water system or de-scale
as needed.
4. Do not allow acidic, caustic or abrasive fluids to be
pumped through system.
5. Always use high grade quality Landa cleaning
products.
6. Always cool the heating module.
7. Periodically descale coils per instructions.
It is advisable, periodically, to visually inspect the
burner. Check air inlet to make sure it is not clogged or
blocked. Wipe off any oil spills and keep this equipment
clean and dry.
The areas around the Landa washer should be kept
clean and free of combustible materials, gasoline and
other flammable vapors and liquids.
The flow of combustion and ventilating air to the burner
must not be blocked or obstructed in any manner.
Maintenance & Service
Winterizing Procedure
Damage due to freezing is not covered by warranty.
Follow these cold weather procedures whenever the
washer must be stored or operated outdoors under
freezing conditions.
If the water heater will be exposed to freezing weather,
an anti-freeze solution should be circulated through the
coils by whatever means are available for the particular
system the water heater is used on. If compressed air
is available, an air fitting can be screwed into the
discharge coupling fitting and by injecting compressed
air, all water will be blown out of the system. The use of
a draft diverter will prevent the wind chill factor from
freezing the coil.
High Limit Hot Water Thermostat
For safety, each machine is equipped with a high limit
control switch. In the event the temperature of the water
should exceed its operating temperature, the high limit
control will turn the burner off until the water cools.
Heating Coils
To Check Water Heater Coil for Leaks
With the main burners “OFF” start the pumping
machine and allow it to run for a few minutes. Check
into the burner compartment with a drop light or flash-
light. If no leaks are visible, then water dripping from
coil is from condensation in the flue gases when the
burner is on.
Condensation from Heating Coil
When cold water is being pumped into the water heater
coils, and the burner is on, condensation will form on
the coil and drip down into the burner compartment,
giving the appearance of a leaking coil, particularly on
cold humid days.
Descaling Coils
In alkaline water areas, lime deposits can accumulate
rapidly inside the coil pipes. This growth is increased by
the extreme heat build up in the coil. The best preven-
tion for liming conditions is to use high quality cleaning
detergents. In areas where alkaline water is an extreme
problem, periodic use of Landa Coil Descaler (part
#8.914-296.0) will remove lime and other deposits
before coil becomes plugged
Periodic descaling of the heating coil is recom-
mended so please consult your local Landa Dealer
for instructions.
Landa NG 3000 Operator’s Manual 8.913-942.0 - E

20
Maintenance
Gas Valve Regulator
Gas Valve Regulator Adjustment
Adjustment of the built-in regulator isn’t normally
necessary, since it is preset at the factory. However,
field adjustment may be accomplished as follows:
1. Attach manometer at pressure tap port.
2. Remove regulator adjustment screw cap.
3. With small screwdriver, rotate adjustment screw
clockwise to increase or counterclockwise to
decrease gas pressure.
4. Replace regulator adjustment screw cap.
Electrode Adjustment
Pilot Burner Adjustment
1. Remove Pilot Adjustment Cap.
2. Adjust pilot key to provide properly sized flame.
3. Replace Pilot Adjustment Cap.
Pressure Relief Valve
Each machine is equipped with a relief valve to relieve
pressure in the system when higher than normal
operating pressures are encountered. Unusually high
pressures come from an object plugging the spray
nozzle. This problem can easily be remedied by
removing the obstruction. If operating pressure of
machine is found to be normal and relief valve
continues to leak, repair or replace the valve.
CAUTION: Open this valve annually to prevent
blockage.
Propane Gas
(Optional Conversion Kit)
General Safety Precautions
Have a qualified gas service person assist in any gas
burner installation or service. Few maintenance people
or mechanics are knowledgeable in gas controls or
related safety practices. Propane gas is heavier than
air, unburned propane gas will gravitate to the floor
rather than rise out of the stack. Hence, adequate floor
space and good ventilation are especially important
with propane systems.
Gas Pressure Requirements
All propane fired machines operate on gas phase only.
They are designed to operate at a pressure of 11 water
column inches (between 1/3 and 1/2 of one PSI), and
are often operated at even higher pressures when extra
heat is needed.
Exterior regulators are needed to control the system.
Propane bottles are not included with machine. A high
pressure regulator should be installed on propane
bottle and a low pressure regulator attached to the
pressure washer.
ON/OFF
Switch
Line to Pilot
Light
Outlet
View
Manifold Pressure
Adjustment Screw
Under Cap
Inlet
View
Line to
Pilot
Light
Landa NG 3000 Operator’s Manual 8.913-942.0 - E
2 Lead
Thermopile
Connections
Pilot 2CH-2 or
Equivalent
To Burner
Flow Switch
Gas Valve
Ignitor
2 Lead Thermopile
(Equivalent to CP-2)