Laars NTV1700 User manual

User’s Manual Doc. 1256
H2353000-
FOR YOUR SAFETY: This product must be installed and serviced by a professional service
technician, qualied in hot water boiler and heater installation and maintenance. Improper installation
and/or operation could create carbon monoxide gas in ue gases which could cause serious injury,
property damage, or death. Improper installation and/or operation will void the warranty.
Users Manual for
NEOTHERM
®
LC
Modulating Boiler Water Heater
Model NTH1000 Model NTV1000
1,000 MBTU/h 1,000 MBTU/h
Model NTH1700 Model NTV1700
1,700 MBTU/h 1,700 MBTU/h
WARNING: If this Users Information
Manual not followed exactly, a re or explosion
may result causing property damage, personal
injury or death.
Do not store or use gasoline or other ammable
vapors and liquids in the vicinity of this or any
other appliance.
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 re
department.
Installation and service must be performed by
a qualied installer, service agency, or the gas
supplier.
AVERTISSEMENT: Si cette informa-
tion utilisateurs manuel n'a pas suivi exactement,
un incendie ou une explosion peut entraîner des
dommages matériels, des blessures ou la mort
Ne pas entreposer ni utiliser d’essence ni d'autres
vapeurs ou liquides inammables dans le voisinage
de cet appareil ou de tout autre appareil.
QUE FAIRE SI VOUS SENTEZ UNE ODEUR DE GAZ:
• Ne pas tenter d’allumer d’appareils.
• Ne touchez à aucun interrupteur. Ne pas vous servir
des téléphones dans le bâtiment où vous vous
trouvez.
• Appelez immédiatement votre fournisseur de
gaz depuis un voisin. Suivez les instructions du
fournisseur.
• Si vous ne pouvez rejoindre le fournisseur de gaz,
appelez le service des incendies.
L’installation et l’entretien doivent être assurés par un
installateur ou un service d’entretien qualié ou par le
fournisseur de gaz.

LAARS Heating Systems

NeoTherm LC Boilers and Water Heaters
Page 1
Location of Components
Note - Model 1000 shown for reference
Pressure and
Temperature
Gauge
Manual
Gas Valve
Manual
Gas Valve (on the back)
Model 1000
Model 1700
User Interface
Protective
Cover
Power Switch
FAMILIARIZING YOURSELF WITH THE
N EO T HERM
®
LC
CONTENTS
Familiarizing yourself with the Laars NeoTherm LC.........1
FOR YOUR SAFETY,
PLEASE READ THIS BEFORE OPERATING.................2
What to Do If You Smell Gas .............................................2
POUR VOTRE SÉCURITÉ,
LISEZ AVANT DE METTRE EN MARCHE........................3
Que Faire si Vous Sentez une Odeur de Gaz ......................3
Lighting the Unit.................................................................4
Turning Off the Gas to the Unit ..........................................4
Instructions de Mise en Marche..........................................5
Fermeture de l’Alimentation en Gaz...................................5
Shutting Down the NeoTherm LC......................................6
Restarting the NeoTherm LC..............................................6
In the Event of Power Failure .............................................6
THE USER INTERFACE AND INDICATORS.................7
About Lockouts, Holds, and Alerts.....................................9
Care, Inspection, and Service............................................10
Shown without jacket. Some components will vary slightly between the 1000 and 1700, but the User Interface & Front Panel remain the same.

LAARS Heating Systems
Page 2
FOR YOUR SAFETY -
PLEASE READ THIS BEFORE OPERATING
WARNING
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 unit does not have a pilot. It is equipped with an ignition device which automatically lights the burner.
Do not try to light the burner by hand.
B. Before operating the unit, check for any smell of gas in the area around it. Be sure to smell next to the
oor, because some gas is heavier than air and will settle near the oor.
C. Use only your hand to turn the handle on the gas valve. Never use tools. If the valve handle will not turn
by hand, don’t try to repair it. Call a qualied service technician. If you force the valve or try to repair it,
this may result in a re or explosion.
D. Do not use this unit if any part has been under water. Immediately call a qualied service technician to
inspect the unit. Any part of the control system or any gas control which has been under water must be
replaced.
WHAT TO DO IF YOU SMELL GAS
·Do not try to light any appliance or device that uses gas.
·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 re department.

NeoTherm LC Boilers and Water Heaters
Page 3
POUR VOTRE SÉCURITÉ,
LISEZ AVANT DE METTRE EN MARCHE
AVERTISSEMENT
Quiconque ne respecte pas à la lettre les instructions dans la présente notice
risque un début d’ incendie ou une explosion entraînant des dommages, des
blessures ou la mort.
A. Cet appareil est muni d’un dispositif d’allumage qui allume automatiquement la veilleuse. Ne tentez pas
d’allumer la veilleu manuellement.
B. Avant de faire fonctionner, reniez tout autour de l’appareil pour déceler une odeur de gaz. Reniez
près du plancher, car certains gaz sont plus lourds que l’air et peuvent s’accumuler au niveau du sol.
C. N’utilisez que votre main pour fermer la soupape d’arrêt de gaz. N’utilisez jamais d’outils. Si la poignêe
de la valve ne tourne pas manuellement, ne tentez pas de la réparer. Communiquez avec un technicien
de service qualié. Le fait de forcer ou de tenter de réparer la poignée pourrait causer un incendie ou une
explosion.
D. N’utilisez pas cet appareil s’il a été plongé dans I’eau, même partiellement. Faites inspecter I’appareil
par un technicien qualié et remplacez toute partie du système de contrôle et toute commande qui ont été
plongées dans I’eau.
QUE FAIRE SI VOUS SENTEZ UNE ODEUR DE GAZ
·Ne pas tenter d’allumer d’appareil.
· Ne toucher à aucun interrupteur; ne pas vous servir des téléphones se trouvant dans le bâtiment.
· Appelez immédiatement votre fournisseur de gaz depuis un voisin. Suivez les instructions du fournisseur.
·Si vous ne pouvez rejoindre le fournisseur, appelez le service des incendies.

LAARS Heating Systems
Page 4
9. (Model 1000) Replace the front panel.
10. Turn ON the electric power to the unit.
11. Set the thermostat to the desired setting.
12. If the unit will not operate, follow the instructions in “Turning Off the Gas to the Unit” and
call your service technician or gas supplier.
TURNING OFF THE GAS TO THE UNIT
1. Before doing any service work, turn off all electric power to the unit.
2. Set the thermostat to the lowest setting.
3. (Model 1000) Remove the front access panel.
(Model 1700) The valve is top left on the back
4. Turn OFF the manual gas valve. The valve is off when the valve handle is at a right angle to
the gas pipe.
5. (Model 1000) Replace the front panel.
LIGHTING THE UNIT
1. STOP! Read the safety information on the previous pages rst!
2. Set the thermostat to the lowest setting.
3. Turn off all electric power to the unit.
4 This unit is equipped with an ignition device which automatically
lights the burner. Do not try to light the burner by hand.
5. (Model 1000) Remove the front access panel.
(Model 1700) The valve is top left on the back
6 Turn OFF the manual gas valve. The valve is off when the valve
handle is at a right angle to the gas pipe.
7. Wait ve minutes to allow any gas to clear. Smell for gas,
including the area near the oor. If you do smell gas, STOP!
Follow Step B in the safety information listed above. If you don’t
smell gas, go to the next step.
8. Slowly turn the manual gas valve to “ON.” The handle on the
valve will be parallel to the gas pipe.
Gas inlet
Manual gas valve
shown in the
Off position

NeoTherm LC Boilers and Water Heaters
Page 5
Entrée
de gaz
Valve de gaz manuel le se
trouvant en position„OFF”.
8. Remettez lentement la soupape d’arrêt de gaz en position „ON”. La poignée sera
parallèle au tuyau de gaz.
9. (Modèle 1000) Remplacer le panneau d’accès avant
10. Rétablissez l’alimentation électrique à l’appareil.
11. Réglez le thermostat à la température désirée.
12. Si l’appareil ne fonctionne pas, suivez les directives relatives à la fermeture de
l’alimentation en gaz et communiquez avec votre technicien de service ou le
fournisseur de gaz.
FERMETURE DE L’ALIMENTATION EN GAZ
1. Coupez toute alimentation électrique à l’appareil si celui-ci doit faire l’objet d’un
entretien.
2. Réglez le thermostat au réglage le plus bas.
3. (Modèle 1000) Déposer le panneau d’accès avant.
(Modèle 1700) La vanne est en haut à gauche à l’arrière
4. Mettez la soupape d’arrêt de gaz à „OFF”. La valve est en position „OFF“ lorsque la
poignée se trouve à angle droit du tuyau de gaz.
5. (Modèle 1000) Remplacer le panneau d’accès avant
INSTRUCTIONS DE MISE EN MARCHE
1. ARRÊTEZ ! Lisez les informations de sécurité sur les pages
précédentes première !
2. Réglez le thermostat à la temperature la plus basse.
3. Coupez l’alimentation électrique de l’appareil.
4. Cet appareil est dote d’un dispositif d’allumage qui allumera
automatiquement le brûleur. Ne tentez pas d’allumer le brûleur
manuellement.
5. (Modèle 1000) Déposer le panneau d’accès avant.
(Modèle 1700) La vanne est en haut à gauche à l’arrière
6. Mettez la soupape d’ arrêt de gaz à „OFF”. La valve est en position
„OFF” lorsque la poignée se trouve à angle droit du tuyau de gaz.
7 Attendez cinq minutes an que le gaz se dissipe. Si vous croyez
sentir une odeur de gaz, ARRÊTEZ ! Reportez-vous aux instructions
B ci-dessus, sur cette étiquette. S’il n’y a pas d’odeur de gaz, passez
à la prochaine étape.

LAARS Heating Systems
Page 6
SHUTTING DOWN THE NEOTHERM LC
It may sometimes be necessary to shut down the NeoTherm LC. Here are the steps required to do this:
1. Switch off the main electrical disconnect switch.
2. (Model 1000) Remove the front access panel and close the main manual gas valve.
(Model 1700) Turn OFF the main manual gas valve. The valve is top left on the back.
3. If freezing is anticipated, drain the NeoTherm LC. (Also be sure to protect the piping in the building
from freezing.)
The steps listed above may require qualied service personnel.
RESTARTING THE NEOTHERM LC
It may be necessary to restart the NeoTherm LC – for example, after a power interruption. Here are the steps
required to do this:
1 Reset any errors using the user interface. See the section on “About Lockouts, Holds, and Alerts.”
2 Turn up the thermostat to call for heat.
3. In approximately 2 seconds, the blower will operate. Ignition should occur after 35-40 seconds. It may
take as long as 2-1/2 minutes.
4. If ignition does not occur, wait 5 minutes and then repeat steps 1 through 3.
5. If, after three attempts, the unit still does not light, shut down the boiler and call your service technician.
If the unit has been drained, follow these steps:
1. See the “Installation and Operation Manual” for instructions on lling and purging the unit.
2. (Model 1000) Remove the front access panel and turn ON the main manual gas valve.
(Model 1700) Turn OFF the main manual gas valve. The valve is top left on the back.
3. Switch on the main electrical disconnect switch. The pump and blower will start, and the igniter will be
energized. After 35 seconds the gas valve will be energized, and ignition will occur. If ignition does not
occur within 2-1/2 minutes switch “off” the main disconnect switch, wait 5 minutes and switch it “on”
again. If after three attempts ignition does not occur, shut down the unit and call for service.
IN THE EVENT OF POWER FAILURE
The NeoTherm LC will not operate during an electrical power outage. If there is an extended power outage
with danger of freezing, then the NeoTherm LC (and all other water systems) should be completely drained.
Before draining the unit, turn off the gas and turn off the main power switch. When you replace the unit in
service, refer to the “Installation and Operation Manual” for instructions on lling and purging.

NeoTherm LC Boilers and Water Heaters
Page 7
On/Off
switch
User
Interface
Boiler
outlet
temperature
and system
pressure
CONTROLS AND INDICATORS
Each NeoTherm LC includes two burners, and each of these burners has a separate burner controller. A
complete system can include up to four boilers, with up to eight burners and eight burner controllers. All
managed through one (1) User Interface on the Lead boiler.
After the system starts, the User Interface Panel will automatically present the Home screen:
The icon for each burner controller will appear in one of four colors:
Blue Normal operation
Red Lockout
Gray Standby mode (Burner switch off)
Gray and
crossed out
Communication problem
Yellow Hold state. This could be Anti short
cycle, fan speed transitions, etc.
User Interface

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Page 8
The operation of the whole system is supervised by the “Lead/Lag” control function. To monitor the
operation of the Lead/Lag system, press the View Lead/Lag button on the Home screen.
In the ‘Lead Lag Master’ example shown above, the complete system includes one boiler, with two
burners.
To check the operation of an individual burner, press one of the large icons on the Home screen. The
system will present a Status Summary screen for that burner:
The Lead/ Lag Master button will also get you to some additional information about the system:
The yellow box in the upper right corner shows the setpoint, and the line above that shows the current
temperature.

NeoTherm LC Boilers and Water Heaters
Page 9
ABOUT LOCKOUTS, HOLDS, AND ALERTS
The system responds to three kinds of trouble indications:
• A”lockout” is caused by a serious problem that might involve a safety issue. Once
the controller enters a lockout, the burners will shut down, and will not be allowed
to run again until the cause of the problem is corrected, and you reset the control
system.
• The system may enter a “hold” for a period of time before locking out. This allows
the controller to see if the error becomes resolved prior to the hard lockout.
• An “alert” indicates that some feature of the control system’s operation was not
correct, delayed, or waiting for a response. This does not necessarily indicate a
problem.
If a problem occurs while the system is starting up, the system will declare a Hold or
Lockout:
If a problem occurs while the system is running, a Bell symbol will appear in the upper
left corner of the screen, and the system will present a note across the bottom of the
screen. If you tap the bar which includes the message, the system will present more
information about the problem. Press the OK button to indicate that you have seen the
Lockout or Alert.
If an audible alarm on the display is active, tap the Bell symbol to stop it.
Each error message includes a number. For a more detailed description of each message,
see the “Installation and Operation Manual.”

LAARS Heating Systems
Page 10
GENERAL CARE
Keep the area around the NeoTherm LC clear and free from combustible materials,
gasoline and other ammable vapors and liquids. Clean the jacket surfaces with a damp
cloth and mild soap. Do not use ammable cleaning materials. Keep the vent terminal
free of obstructions. Do not pile snow against the vent terminal.
ANNUAL INSPECTION AND SERVICE
You should visually inspect the vent pipe once a year. Should any corrosion or leaks
exist, have the affected parts replaced.
Once each year a qualied service agency should conduct a detailed inspection of all ue
product carrying areas of the boiler and vent system. Follow the service instructions in
the “Installation and Operating Instructions Manual” for the NeoTherm LC.
Caution
Do not use this boiler if any part has been under water.
Immediately call a qualified service technician to inspect the
boiler. Any part of the control system and any gas control which
has been under water must be replaced.
WARNING
If the unit overheats or the gas supply fails to shut off, do
not turn off or disconnect the electrical supply to the pump.
Instead, shut off the gas supply at a location external to the
NeoTherm LC.
En cas de surchauffe ou si l’admission de gaz ne peut être
coupée, ne pas couper ni débrancher l’alimentation électrique
de la pompe. Fermer plutôt le robinet d’admission de gaz à
l’extérieur de l’appareil.
FOR SERVICE
Contact your installing contractor, gas utility, Laars dealer, or check www.Laars.com for
the nearest authorized representative in your area.
H2353000-
800.900.9276 • Fax [phone] (Customer Service, Service Advisors)
20 Industrial Way, Rochester, NH 03867 • 603.335.6300 • Fax [phone] (Applications Engineering)
1869 Sismet Road, Mississauga, Ontario, Canada L4W 1W8 • 905.238.0100 • Fax [phone]
www.Laars.com Printed in U.S.A. © Laars Heating Systems 1210 Document 1256
Dimensions and specications subject to change without notice in accordance with our policy of continuous product improvement.