Laars NTV User manual

Installation and Operation Instructions Document 1330A
H2374100A
WARNING
If the information in this manual is not
followed exactly, a re or explosion may
result causing property damage, personal
injury or loss of life.
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
nearby 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 gas
supplier.
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.
AVERTISSEMENT
Assurez-vous de bien suivres les instructions
données dans cette notice pour réduire au
minimum le risque d’incendie ou d’explosion
ou pour éviter tout dommage matériel, toute
blessure 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 dansle 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 sservice 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.
Installation and Operation
Instructions for
NEOTHERM
®
with Touchscreen Display
Modulating Boiler
Model NTH
Sizes 285–850 MBTU/h
Water Heater
Model NTV
Sizes 150–850 MBTU/h

LAARS Heating Systems
Section 1 -
General Information
1.1 Introduction.......................................................1
1.2 ModelIdentication...........................................1
1.3 ApplianceOverview.......................................2-5
1.4 Warranty ...........................................................6
1.5 Unpacking.........................................................6
1.6 Dimensions.......................................................6
Section 2 -
Locating the Appliance
2.1 GeneralInformation..........................................8
2.2 LocatingApplianceforCorrectVentDistance
 fromOutsideWallorRoofTermination.............8
Section 3 -
Venting and Combustion Air
3.1 GeneralVenting................................................9
3.2 CombustionAir ...............................................10
3.3 Venting............................................................ 11
3.4 LocatingVent&CombustionAirTerminals.....13
3.5 CommonVentTest .........................................16
Section 4 -
Gas Supply and Piping
4.1 GasSupplyandPiping ...................................16
Section 5 -
Pump Requirements
5.1 NeoThermBoilerFlowand
 HeadRequirements........................................17
5.2 NeoThermWaterHeater
 FlowandHeadRequirements ........................17
Section 6A -
Water Connections - NTH Boiler
6A.1 NTHSystemPiping:HotSupply
 Connections....................................................18
6A.2 NTHColdWaterMake-Up..............................18
6A.3 CondensateDrain...........................................19
6A.4 FreezeProtection ...........................................19
6A.5 NTHSuggestedPipingSchematics ...............19
6A.6 RecognizedChemicals...................................19
Section 6B -
Water Connections - NTV Water Heater
6B.1 NTVWaterQuality..........................................27
6B.2 PipingRequirements ......................................27
6B.3 ColdWaterMake-Up ......................................28
6B.4 CondensateDrain...........................................28
6B.5 FreezeProtection ...........................................28
6B.6 NTVSuggestedPipingSchematics................28
6B.7 NTVSuggestedPumps....................................28
Section 7 –
Electrical and Wiring Diagrams
7.1 InstallationWarnings.......................................31
7.2 MainPowerConnections................................31
7.3 PumpConnectionsandOperation..................31
7.4 HydronicHeatingUsingExternalMod............31
7.5 OptionalFieldConnection...............................33
7.6 ConnectionstoaBuildingAutomationSys .....33
7.7 LadderandWiringDiagrams ..........................33
Table of Contents
i

NeoTherm Boilers and Water Heaters
ii
Section 9 -
First Start Up and Adjustment
9.1 FillingtheBoilerSystem .................................54
9.2 FirstOperation................................................54
9.3 ShuttingDowntheNeoThermUnit.................55
9.4 RestartingtheNeoThermUnit........................55
Section 10 -
Maintenance
10.1 SystemMaintenance ......................................56
10.2 ApplianceMaintenanceandComponent
Description......................................................56
10.3 GasConversion..............................................59
Section 11 -
Troubleshooting
11.1 AboutLockouts,Holds,andAlerts ...................60
11.1.1RespondingtoaLockout,Hold,orAlert .....60
11.1.2ViewingtheLockoutandAlertHistories ......61
11.2 TroubleshootingTable.................................62-73
11.3 DiagnosticTestsandInput/OutputIndicators ..74
11.4 Lead/LagSlaveDiagnostics ............................75
11.5 Statistics...........................................................75
11.6 Analysis............................................................75
11.7 ControlSnapshot .............................................75
11.8 OperatingSequence ........................................76
Section 12 -
Replacement Parts
12.1 GeneralInformation.......................................77
12.2 PartsList...................................................77-79
12.3 PartsIllustrations ......................................80-88
Section 8 -
Navigating the Touch Screen
8.1 TheTouchScreen ........................................35
8.2 UsingtheTouchScreen ................................35
8.3 VericationProcessforSafety-Related
  Parameters ....................................................37
8.4 WhileOperating-CheckingIndividual
  Parameters ....................................................38
8.5 ConguringParametersonIndividual
  Controllers .....................................................39
8.6 SettingtheDateandTime..............................40
8.7 CongurationMenus(ALL)....................41
8.7.1 SystemIdentication&Access...................41
8.7.2 CH-CentralHeatConguration.................41
8.7.3 OutdoorResetConguration......................41
8.7.4 DHW-DomesticHotWaterConguration .42
8.7.5 WarmWeatherShutdownConguration ....42
8.7.6 DemandPriorityConguration ...................42
8.7.7 ModulationConguration............................42
8.7.8 PumpConnections .....................................42
8.7.9 StatisticsConguration...............................43
8.7.10HighLimits..................................................43
8.7.11StackLimits ................................................43
8.7.12Anti-CondensationConguration................43
8.7.13FrostProtectionConguration....................44
8.7.14SystemConguration .................................44
8.7.15FanConguration .......................................44
8.7.16SensorConguration..................................44
About Lead / Lag
................................................ 45
8.7.17LeadLagSlaveConguration ....................47
8.7.18LeadLagMasterConguration ..................49
8.8 Connectionstoa
  BuildingAutomationSystem..........................49
8.9 OptionalVARI-PRIMETM ................................49
Combustion Setup
.............................................50
8.10.1 CombustionSetupProcedure .......................50
8.10.2 AdjustingCO2...............................................52

LAARS Heating Systems

Page 1
NEOTHERM Boilers and Water Heaters
Section 1 -
GENERAL INFORMATION
WARNING
NeoTherm units must be installed in accordance
with the procedures detailed in this manual, or the
LAARS Heating Systems warranty will be voided. The
installation must conform to the requirements of the
local jurisdiction having authority, and, in the United
States, to the latest edition of the National Fuel Gas
Code,ANSI Z223.1/NFPA54. In Canada, the installation
must conform to the latest edition of CSAB149.1
Natural Gas and Propane Gas Installation Code, and/
or local codes. Where required by the authority having
jurisdiction, the installation of NeoTherm boilers must
conform to the Standard for Controls and Safety
Devices forAutomatically Fired Boilers, ANSI/ASME
CSD-1. Any modications to the boiler, its gas controls,
or wiring may void the warranty. If eld conditions
require modications, consult the factory representative
before initiating such modications.
1.1 Introduction
This manual provides information necessary for the
installation, operation, and maintenance of LAARS Heating
Systems NeoTherm appliances. Read it carefully before
starting the installation.
All application and installation procedures should be reviewed
completely before proceeding with the installation. Consult
the LAARS Heating Systems factory, or local factory
representative, with any problems or questions regarding
this equipment. Experience has shown that most operating
problems are caused by improper installation.
NeoTherm is protected against over pressurization. A
pressure relief valve is included with each NeoTherm. Some
NeoTherms may require that the PRV be installed prior to
lling the system. Refer to Figures 1-7 for PRV locations.
DANGER
The inlet gas pressure to the appliance must not
exceed 13” W.C. (3.2kPa).
All installations must be made in accordance with
1) American National Standard Z223.1/NFPA54-Latest
Edition “National Fuel Gas Code” or
2) CSA B149.1 “Natural Gas and Propane Installation
Code” and with the requirement of the local utility or other
authorities having jurisdiction. Such applicable requirements
take precedence over the general instructions contained
herein.
All electrical wiring is to be done in accordance with the local
codes, or in the absence of local codes, with: 1) The National
Electrical Code ANSI/NFPA No. 70-latest Edition, or 2)
CSA STD. C22.1 “Canadian Electrical Code - Part 1”. This
appliance must be electrically grounded in accordance with
these codes.
1.2 ModelIdentication
Consult the rating plate on the unit. The following information
describes the model number structure.
(1-2) ModelSeriesDesignation
N T = NeoTherm
(3) Usage
H = Hydronic
V = Volume Water
(4-6) Size
1 5 0 = 150,000 BTU/hr input, NTV only
1 9 9 = 199,000 BTU/hr input, NTV only
2 1 0 = 210,000 BTU/hr input, NTV only
2 8 5 = 285,000 BTU/hr input
3 9 9 = 399,000 BTU/hr input
5 0 0 = 500,000 BTU/hr input
6 0 0 = 600,000 BTU/hr input
7 5 0 = 750,000 BTU/hr input
8 5 0 = 850,000 BTU/hr input
(7) Fuel
N = Natural Gas
P = LP Gas
(8) Options Code
X = Standard Unit
J = CSD-1, FM, GAP, IL Code (size 500-850 only)
C - STANDARD (Canada)
D - CSD-1 (Canada)
E - OUTDOOR
F - OUTDOOR (Canada)
G - CSD-1, OUTDOOR
H - CSD-1, OUTDOOR (Canada)
(9) Pump Options
N = Pump included (80-500 only)
X = No pump (conguration available for all sizes)
(10) Revision
3 = Third version
ModelNomenclature
1 2 3 4 5 6 7 8 9 10 11
SERIES
N T USAGE
H - HYDRONIC
V - VOLUME
WATER
SIZE
MBTU/h
1 5 0
1 9 9
2 1 0
2 8 5
3 9 9
5 0 0
6 0 0
7 5 0
8 5 0
FUEL
N - NATURAL
P - PROPANE
OPTIONS CODE
X - STANDARD
J - CSD-1, FM, GAP,
IL
(500-850 only)
C - STANDARD (Canada)
D - CSD-1 (Canada)
E - OUTDOOR
F - OUTDOOR (Canada)
G - CSD-1, OUTDOOR
H - CSD-1, OUTDOOR
(Canada)
PUMP OPTIONS
N - PUMP INCL.
(80-500 only)
X - NO PUMP
REVISION
3 - THIRD REG DESIGNATION
B3N T
B- INTERNAL USE

Page 2
LAARS Heating Systems
Figure 1. LocationofComponents,Sizes150-210
Figure 2. LocationofComponents,Size285
EXHAUST VENT CONNECTION
GAS CONNECTION
AIR PRESSURE SWITCH
TOUCHSCREEN
HEAT EXCHANGER GAS VALVE
VENTURI
AIR/ GAS
BLOWER
PRESSURE RELIEF VALVE
WATER INLET
WATER OUTLET
AIR INLET CONNECTION
DRAIN VALVE
CONDENSATE TRAP
AIR TRANSITION
ON / OFF SWITCH
EXHAUST VENT CONNECTION
AIR INLET CONNECTION
GAS CONNECTION
TOUCHSCREEN
HEAT EXCHANGER
GAS VALVE VENTURI
AIR/ GAS
BLOWER
WATER INLET
WATER OUTLET
PRESSURE RELIEF VALVE
AIR PRESSURE SWITCH
DRAIN VALVE
CONDENSATE TRAP
AIR TRANSITION
ON / OFF SWITCH
1.3 ApplianceOverview-See Figures 1 through 6.

Page 3
NEOTHERM Boilers and Water Heaters
Figure 4. LocationofComponents,Size399
EXHAUST VENT CONNECTION
GAS CONNECTION
TOUCHSCREEN
HEAT EXCHANGER
MANUAL SHUTOFF
GAS VALVE
VENTURI
AIR/ GAS
BLOWER
PRESSURE RELIEF VALVE
WATER INLET
WATER OUTLET
AIR INLET CONNECTION
DRAIN VALVE
CONDENSATE TRAP
GAS VALVE
ON / OFF SWITCH
Figure 3. LocationofComponents,Size500
EXHAUST VENT CONNECTION
PRESSURE RELIEF VALVE
AIR PRESSURE SWITCH
TOUCHSCREEN
HEAT EXCHANGER
MANUAL SHUTOFF
GAS VALVE
VENTURI
GAS VALVE
WATER INLET
WATER OUTLET
AIR INLET CONNECTION
DRAIN VALVE
CONDENSATE TRAP
GAS CONNECTION
AIR/ GAS BLOWER
GAS PRESSURE
SWITCH
AIR PRESSURE SWITCH
ON / OFF SWITCH

Page 4
LAARS Heating Systems
Figure 5. LocationofComponents,Size600
EXHAUST VENT CONNECTION
GAS CONNECTION
PRESSURE RELIEF VALVE
TOUCHSCREEN
HEAT EXCHANGER
MANUAL SHUTOFF
GAS VALVE
VENTURI
AIR/ GAS BLOWER
AIR PRESSURE SWITCH
WATER INLET
WATER OUTLET
AIR INLET CONNECTION
DRAIN VALVE
CONDENSATE TRAP
GAS VALVE
MANUAL SHUTOFF
GAS VALVE
ON / OFF SWITCH
1.4 Warranty
LAARS Heating Systems NeoTherm appliances are covered
by a limited warranty. The owner should complete the
warranty registration at www.Laars.com.
All warranty claims must be made at www.Laars.com. or to an
authorized LAARS Heating Systems representative. Claims
must include the serial number and model (this information
can be found on the rating plate), installation date, and
name of the installer. Shipping costs are not included in the
warranty coverage.
Some accessory items may be shipped in separate packages.
Verify receipt of all packages listed on the packing slip.
Inspect everything for damage immediately upon delivery,
and advise the carrier of any shortages or damage. Any such
claims should be led with the carrier. The carrier, not the
shipper, is responsible for shortages and damage to the
shipment whether visible or concealed.
1.5 Unpacking
The NeoTherm unit is shipped in a single crate with the
following standard components packed with the appliance.
(See Figure 7)
A. Exhaust vent terminal (US only)
B. Air intake terminal
C. Temperature/pressure gauge kit
D. Circulator pump/wire harness (units with pump)
E. CPVC exhaust pipe section (199-850) (US only)
F. Outdoor/system sensor kit
G. Flow switch kit (399-850)
H. Alternate size vent/terminal screens
J. Exhaust vent adapter CPVC/ST ST (750-850)
K. 4x6 PVC adapter with 4x7 PVC pipe section
(750-850) (not to be used on exhaust in Canada)
1. Remove all packing and tie-down materials.
2. Check the contents of the carton against the items
shown.

Page 5
NEOTHERM Boilers and Water Heaters
Figure 6. LocationofComponents,Sizes750and850
WATER INLET
WATER OUTLET
AIR INLET
DRAIN VALVE
CONDENSATE TRAP
AIR/ GAS BLOWER
PRESSURE RELIEF
VALVE
TOUCHSCREEN
HEAT EXCHANGER
EXHAUST VENT
CONNECTION
VENTURI
GAS VALVE
GAS CONNECTION
MANUAL SHUTOFF
GAS VALVE
ON / OFF SWITCH
Figure 7. ContentsofShippingPackage

Page 6
LAARS Heating Systems
Table1. DimensionDrawing,Sizes150-850
A B C D E F G J K M N
Size/Model in cm in cm in cm in cm in cm in cm in cm in cm in cm in cm in cm
150 NTV 13¼ 34 5¼ 14 19 48 3¼ 810¾ 28 7½ 19 14¼ 36 19½ 49 7½ 19 15¼ 39 13 33
199 NTV 20½ 52 5¼ 14 19 48 3¼ 817¾ 45 7½ 19 14¼ 36 19½ 49 11¾ 30 15¼ 39 13 33
210 NTV 20½ 52 5¼ 14 18¼ 46 3¼ 817¾ 45 7½ 19 14¼ 36 19½ 49 11¾ 30 15¼ 39 13 33
285 NTH 20¼ 52 7¼ 19 19¼ 49 6¼ 16 11¼ 29 13½ 34 14 36 15 38 17 43 18¾ 48 13 33
285 NTV 20¼ 52 7¼ 19 19¾ 50 4¼ 16 11¼ 29 13½ 34 14 36 15 38 17 43 18¾ 48 13 33
399 NTH 25 64 5¼ 13 19¼ 49 4¼ 11 14¾ 37 18½ 47 19¼ 49 16½ 42 21¾ 55 18¾ 48 13 33
399 NTV 25 64 5¼ 13 19¾ 50 4¼ 11 14¾ 37 18½ 47 19¼ 49 16½ 42 21¾ 55 18¾ 48 13 33
500 NTH 30¼ 77 5¼ 13 19½ 50 4¼ 11 15¼ 38 20 51 20½ 52 19 48 26 66 18¾ 48 13 33
500 NTV 30¼ 77 5¼ 13 19¾ 50 4¼ 11 15¼ 38 20 51 20½ 52 19 48 26 66 18¾ 48 13 33
600 (both) 29¾ 76 513 19½ 50 4¼ 11 15 38 20 51 3819 48 26 66 18¾ 48 8¼ 21
750 (both) 35½ 90 615 19½ 50 5¼ 13 19 48 40½ 103 3¼ 819 48 30¾ 78 18¾ 48 8¼ 21
850 (both) 39¾ 101 615 19½ 50 5¼ 13 19 48 44¾ 114 3½ 919 48 35 89 18¾ 48 8¼ 21
Dimensions are nominal and are shown in inches, cm.
*NeoTherm is shipped with adapters for the air and vent
that accept standard pipe of the proper size and type.
W L H AIR INLET VENT
SIZE IN CM IN CM IN CM IN CM IN CM
150 25 64 19½ 68 38¼ 97 37.6 37.6
199/210 25 64 26¾ 68 38¼ 97 37.6 37.6
285 25 64 26¾ 68 38¼ 97 411 411
399 25 64 31½ 80 38¼ 97 411 411
500 25 64 37¾ 96 38¼ 97 411 411
600 25 64 37¾ 96 38¼ 97 411 411
750 25 64 51 130 38¼ 97 411 617
850 25 64 55¼ 130 38¼ 97 411 617
1.6 Dimensions
All NeoTherm model dimensions are shown in Table 1
(width) (length) (height)