Laars NeoTherm LC NTV1700 - Install and Operating Manual User Manual

Installation and Operation Instructions Document 1255BH2352900B WARNINGIf the information in this manual is not followed exactly, a re or explosion

LAARS Heating SystemsPage 6Fig. 5 - Dimensions - NT 10001.7 Dimensions The dimensions are shown in Fig. 5 and Fig. 6.1.8 UnpackingThe NeoTherm LC is

LAARS Heating SystemsPage 96 Correct the cause of the problem, and press the button on the screen to clear the Hold.2. If a serious problem continu

NeoTherm LC Boilers and Water HeatersPage 97Fig. 128 – Alert Log Screen To get more information on a particular alert, touch the entry for that alert

LAARS Heating SystemsPage 9812.3 Troubleshooting TableThis table includes a listing of the faults that might be generated by the controllers, and di

NeoTherm LC Boilers and Water HeatersPage 99Code Description L or HProcedure11 Internal fault:Invalid burner control state agL Internal fault1. Reset

LAARS Heating SystemsPage 100Code Description L or HProcedure26 Internal fault:Static ame rippleH Internal fault1. Reset module2. If fault repeats,

NeoTherm LC Boilers and Water HeatersPage 101Code Description L or HProcedure53 AC input phases reversed L 1. Check the module and display connections

LAARS Heating SystemsPage 102Code Description L or HProcedure79 Outlet high limit H or L1. Check wiring and correct any possible errors.2. Replace th

NeoTherm LC Boilers and Water HeatersPage 103Code Description L or HProcedure97 Internal Fault: A2D mismatch. L Internal Fault.1. Reset module.2. If f

LAARS Heating SystemsPage 104Code Description L or HProcedure108 Flame lost in run L 1. Check main valve wiring and operation - correct any errors.2.

NeoTherm LC Boilers and Water HeatersPage 105Code Description L or HProcedure129 Fan speed failed during preignition H or L1. Check wiring and correct

NeoTherm LC Boilers and Water HeatersPage 7Fig. 6 - Dimensions - NT 1700

LAARS Heating SystemsPage 106Code Description L or HProcedure155 Purge fan switch OFF H or L1. Purge fan switch is off when it should be on.2. Check

NeoTherm LC Boilers and Water HeatersPage 107Code Description L or HProcedure164 Block intake ON L 1. Check wiring and correct any errors.2. Inspect t

LAARS Heating SystemsPage 108Code Description L or HProcedure187 Invalid DHW (Domestic Hot Water) high limit enable settingL 1. Return to Conguratio

NeoTherm LC Boilers and Water HeatersPage 109Code Description L or HProcedure200 Invalid lightoff rate setting L 1. Return to Conguration mode and re

LAARS Heating SystemsPage 110Code Description L or HProcedure214 Invalid Prepurge time setting L 1. Return to Conguration mode and recheck selected

NeoTherm LC Boilers and Water HeatersPage 111Code Description L or HProcedure225 Invalid Flame threshold setting L 1. Return to Conguration mode and

LAARS Heating SystemsPage 112Code Description L or HProcedure237 Invalid DHW (Domestic Hot Water) connector type settingL 1. Return to Conguration

NeoTherm LC Boilers and Water HeatersPage 11312.4 Diagnostic Tests and Input/Output IndicatorsTwo kinds of screens are grouped together in this sect

LAARS Heating SystemsPage 11412.5 Lead/Lag Slave DiagnosticsThe control system includes a diagnostic screen that lists some information on the Lead/

NeoTherm LC Boilers and Water HeatersPage 11512.8 Control SnapshotThe software allows you to take a “snapshot” of the current state of the controller

LAARS Heating SystemsPage 8Section 2LOCATING THE APPLIANCE2.1 Locating the ApplianceThe NeoTherm LC may be installed indoors or outdoors. The unit

LAARS Heating SystemsPage 116Burner Ignition SequenceHere is the start-up sequence following a Lead Lag (LL) Central Heating request: 1. The thermos

NeoTherm LC Boilers and Water HeatersPage 117During the Initiate Period:• All of the checks made under Synchronization, plus:• Locks out if A/C line

LAARS Heating SystemsPage 118Section 13REPLACEMENT PARTSUse only genuine LAARS replacement parts.13.1 General InformationTo order or purchase parts

NeoTherm LC Boilers and Water HeatersPage 119Key No.Part No. -1000Part No. -1700Description35 10J3019 COVER36 S2116600 GROMMET, 1 1/2” PIPE, FLEX37 10

LAARS Heating SystemsPage 120Key No.Part No. -1000Part No. -1700Description82 R2073812 R2073812 GASKET, D-SHAPE, RUBBER,R2073903 R2073903 GASKET, STR

NeoTherm LC Boilers and Water HeatersPage 121Key No.Part No. -1000Part No. -1700Description118 10J4050 PIPE, WATER INLET ASSY(NTH)10J4080 PIPE, WATER

LAARS Heating SystemsPage 122Key No.Part No. -1000Part No. -1700Description162 P0012300 NIPPLE CLOSE 1/4 NPT (CSD-1)164 V2018600 ADAPTER, 4MM HOSE B

NeoTherm LC Boilers and Water HeatersPage 123Key No.Part No. -1000Part No. -1700Description207 R10J7008 R10J7008 PANEL ASSY, CONTROL, SLIDING (WITH D

LAARS Heating SystemsPage 124Fig. 140 - Machine Frame - NT100013.3 Parts Illustrations

NeoTherm LC Boilers and Water HeatersPage 125Fig. 141 - Rear Panel - NT1000Fig. 142 - Rear Panel - NT1700

NeoTherm LC Boilers and Water HeatersPage 9shall be of the same cross-sectional area as the free area of the openings to which they connect.Method 1:

LAARS Heating SystemsPage 126Fig. 143 - Machine Frame - NT1700

NeoTherm LC Boilers and Water HeatersPage 127Fig. 144 - Front Panels and Covers - NT1000 and NT1700

LAARS Heating SystemsPage 128Fig. 145 - Burners and Combustion Chamber - NT1000

NeoTherm LC Boilers and Water HeatersPage 129Fig. 146 - Burners and Combustion Chamber - NT1700

LAARS Heating SystemsPage 130Fig. 147 - Heat Exchanger Components - NT1000 and NT1700Fig. 148 - Burner Detail - NT1000

NeoTherm LC Boilers and Water HeatersPage 131Fig. 149 - Burner Detail - NT1700

LAARS Heating SystemsPage 132Fig. 150 - Electronic ComponentsFig. 151 - Condensate Trap - NT1000

NeoTherm LC Boilers and Water HeatersPage 133Fig. 152 - Condensate Trap - NT1700Fig. 153 - Flow Switch - NT1000 and NT1700

LAARS Heating SystemsPage 134This page intentionally left blank.

NeoTherm LC Boilers and Water HeatersPage 135This page intentionally left blank.

LAARS Heating SystemsPage 10Method 2: One permanent opening, commencing within 12” (300 mm) of the top of the enclosure, shall be permitted. The open

H2352900B800.900.9276 • Fax 800.559.1583 (Customer Service and Product Support)20 Industrial Way, Rochester, NH 03867 • 603.335.6300 • Fax 603.335.335

NeoTherm LC Boilers and Water HeatersPage 113.2 Venting WARNINGSelection of improper vent materials for installations that are installed in closets,

LAARS Heating SystemsPage 12It is the responsibility of the appropriately licensed technician installing this NeoTherm LC to use ULC S636 certied ve

NeoTherm LC Boilers and Water HeatersPage 13*When vent terminal is less than 10 feet (3 m) horizontally from a forced air inlet, the terminal must be

LAARS Heating SystemsPage 145. Locate the vent terminal so that it cannot be blocked by snow. The installer may determine that a vent terminal must

NeoTherm LC Boilers and Water HeatersPage 153.3.3 Vertical Vent TerminalWhen the unit is vented through the roof, the vent must extend at least 3 fee

NeoTherm LC Boilers and Water HeatersSection 1 GENERAL INFORMATION ... 11.1 Introduction ...

LAARS Heating SystemsPage 163. As much as possible, close all building doors and windows. Also close all doors between the space in which the appli

NeoTherm LC Boilers and Water HeatersPage 17Section 4 GAS SUPPLY AND PIPING4.1 Gas Supply and PipingGas piping should be supported by suitable hanger

LAARS Heating SystemsPage 18SCHED 40 METAL PIPE CAPACITY FOR 1.50 SPECIFIC GRAVITY UNDILUTED PROPANENOMINAL PIPE SIZE @ 11” W.C. INLET AND 0.5” W.C.

NeoTherm LC Boilers and Water HeatersPage 19Section 5PUMP REQUIREMENTS5.1 NeoTherm LC Boiler Flow and Head Requirements5.2 NeoTherm LC Water Heater

LAARS Heating SystemsPage 20Suggested piping diagrams are shown in Figures 12 through 16. These diagrams are meant only as guides. Components require

NeoTherm LC Boilers and Water HeatersPage 216A.3 NTH Freeze Protection WARNINGGlycol must not be used in domestic hot water applications. Refer to Se

LAARS Heating SystemsPage 22Fig. 12 - Hydronic Piping — Single Boiler, Multiple Temperature ZonesZoning with circulatorsWater feedcontrolsAir vent4 p

NeoTherm LC Boilers and Water HeatersPage 23Fig. 13 - Hydronic Piping — Single Boiler, Zoning with Circulators, Indirect DHW Tank with Zone PumpsIndir

LAARS Heating SystemsPage 24Fig. 14 - Hydronic Piping — Single Boiler with Low Temperature Zones and Indirect DHW TankIndirect tank directly off of b

NeoTherm LC Boilers and Water HeatersPage 25Fig. 15 - Hydronic Piping — Multiple Boilers, Multiple Temperature Zones, Reverse ReturnZoning with circul

LAARS Heating SystemsSection 9 – SETUP AND CONFIGURATION ... 449.1 ReviewofLead/LagControlSystem ... 44 9.1.1 Abou

LAARS Heating SystemsPage 26Fig. 16 - Hydronic Piping — Multiple Boilers, Indirect DHW Off of One BoilerSpace heating zone circuitsSpace heating zone

NeoTherm LC Boilers and Water HeatersPage 276B.2 NTV Piping RequirementsThe water piping should be supported by suitable hangers and oor stands. Do

LAARS Heating SystemsPage 286B.3 NTV Cold Water Make-UpThe cold water make-up may be connected to the tank or to the inlet of the boiler as shown in

NeoTherm LC Boilers and Water HeatersPage 29Fig. 19 - DHW Piping - Two Heaters, Two Vertical TanksNOTES:1. Optional CWMU & recirculation line l

LAARS Heating SystemsPage 30Section 7ELECTRICAL CONNECTIONS WARNINGThe NeoTherm LC appliance must be electrically grounded in accordance with the re

NeoTherm LC Boilers and Water HeatersPage 31Fig. 20 - Electronics Panel LayoutTB5TB2TB1Primary controller(upper burner)Secondary controller(lower burn

LAARS Heating SystemsPage 32The System pump connections are located on terminal block 5 (5-6 on TB5) in the control panel. (See Figure 20.) The Syste

NeoTherm LC Boilers and Water HeatersPage 33Fig. 21 - Ladder Diagram

LAARS Heating SystemsPage 34Fig. 22 - Wiring Diagram

NeoTherm LC Boilers and Water HeatersPage 35

LAARS Heating Systems

LAARS Heating SystemsPage 36Section 8USING THE TOUCH SCREEN AND GAUGES8.1 The Touch Screen and GaugesThere are only a few gauges on the front of th

NeoTherm LC Boilers and Water HeatersPage 37Login1 2 3 4 5 6 7 8 9 0 - =q w e r t y i o p [ ]ua s d f g h j k l : *z x c v b n m , . /Shift BackspaceO

LAARS Heating SystemsPage 38At the bottom of the screen shown in Fig. 28, the system is telling you that it wants you to log in. Fig. 28 - Login Requ

NeoTherm LC Boilers and Water HeatersPage 392. You can change the setpoints from this screen. When you press the yellow box beside Setpoint, the con

LAARS Heating SystemsPage 408.6 Checking Individual DetailsThe Details button on the Status Summary screen leads to a series of screens that show al

NeoTherm LC Boilers and Water HeatersPage 413. Press the Congure button to start a conguration session for the selected controller. See Fig. 39.Fi

LAARS Heating SystemsPage 42Fig.43-VericationNeededNotes –• Once you change one of these safety-related parameters, you must nish the vericat

NeoTherm LC Boilers and Water HeatersPage 43Fig. 47 - Safety Parameter Reset7. The Reset button is located on the front of the controller. See Fig.

LAARS Heating SystemsPage 44Section 9SETUP AND CONFIGURATION9.1 Review of Lead/Lag Control System9.1.1 About Lead/Lag OperationThe boilers in this

NeoTherm LC Boilers and Water HeatersPage 45In either kind of installation, a system sensor is usually used to monitor the demand. The input from thi

NeoTherm LC Boilers and Water HeatersPage 1Section 1GENERAL INFORMATION1.1 IntroductionThis manual includes information which will help you to install

LAARS Heating SystemsPage 46Fig. 50 – Lead/Lag Activity in a Multi-Boiler SystemLow demand -The first burner* insequence fires atless than 65%Firstb

NeoTherm LC Boilers and Water HeatersPage 47Fig. 51 – Connection Terminals

LAARS Heating SystemsPage 48System Multiple or single boilersSystem or local boiler controlCommon ventSetpoint control 4-20 maModulation control, 4-2

NeoTherm LC Boilers and Water HeatersPage 4915 Single boilerSystem No No Yes No16 Single boilerSystem No No Yes Yes, from system17 Multiple boilerSyst

LAARS Heating SystemsPage 50System 4 –Multiple boilers, Local control, Outdoor resetJob B Set up the names for each of the controllersJob C Make on

NeoTherm LC Boilers and Water HeatersPage 51System 7 –Single boiler, System controlJob I Set the parameters used by the Lead/Lag systemJob L Buildin

LAARS Heating SystemsPage 52System 11 –Single boiler, System control, 4-20 mA setpoint controlJob I Set the parameters used by the Lead/Lag systemJo

NeoTherm LC Boilers and Water HeatersPage 53System 15 –Single boiler, System control, 4-20 mA modulation controlJob N Building automation or multiple

LAARS Heating SystemsPage 54System 20 –Multiple boiler, System control, Common vent, 4-20 mA setpoint control, Outdoor resetJob A Note on common ven

NeoTherm LC Boilers and Water HeatersPage 559.4 Installation JobsNote – To install your system, you will not need to do all of the installation jobs

LAARS Heating SystemsPage 2• Each controller and burner work together. Each boiler includes two of these controller/burner combinations. Notice the

LAARS Heating SystemsPage 56present the keyboard screen. Use the “BS” (BackSpace) key to erase the existing name. Enter the new name, then press OK

NeoTherm LC Boilers and Water HeatersPage 57Job D - Disable the Lead/Lag Master Function on the Lead/Lag Slaves(This is an individual function – do t

LAARS Heating SystemsPage 58Job E – Set Up the Modbus Control Addressing(This is an individual function – do this for each of the controls Use the s

NeoTherm LC Boilers and Water HeatersPage 59Primary Control on Boiler 1 is “1.” If this is not already set to “1”, enter the correct number, then pre

LAARS Heating SystemsPage 60 WARNINGIf the ap valve identications are not congured correctly, this could cause the equipment to malfunction. Thi

NeoTherm LC Boilers and Water HeatersPage 61Table 14 – Number of ControlsNumber of boilersNumber of controls2 43 64 8 For example, if your system ha

LAARS Heating SystemsPage 62Fig. 74 – Reset Button on Controller The control system allows 30 seconds to press the reset button. Do not press the R

NeoTherm LC Boilers and Water HeatersPage 63Job G – Disconnect Unused Touch ScreensOnce a Lead/Lag system is set up and operating, the monitoring func

LAARS Heating SystemsPage 64Boiler 1(Lead/Lag Master) Boiler 2Secondary PrimaryTB9, pin 7 connect to TB9, pin 1TB9, pin 8 connect to TB9, pin 2

NeoTherm LC Boilers and Water HeatersPage 65DHW time of day setpoint -Separate Time-of-Day Setpoint for Domestic Hot Water (See the material on “Abou

NeoTherm LC Boilers and Water HeatersPage 3manual includes two longer sections that will help you to work with the control system:• Section 8 – “Usin

LAARS Heating SystemsPage 6620 mA water temperature - If a 4 – 20 mA input is used to adjust the setpoint, this entry sets the high limit of the cont

NeoTherm LC Boilers and Water HeatersPage 67 Low water temp. -If the outdoor temperature reaches the Max. Outdoor Temp. or higher, the system will us

LAARS Heating SystemsPage 68About the “Time of Day” FunctionIf the “time of day” function is enabled, the control system can be set to maintain diffe

NeoTherm LC Boilers and Water HeatersPage 692. Set the outdoor reset and warm weather shutdown parameters as desired.How to get there – Outdoor Reset

LAARS Heating SystemsPage 70When Outdoor Reset is enabled, and the outdoor temperature falls between the maximum and minimum outdoor temperatures (70

NeoTherm LC Boilers and Water HeatersPage 71Fig.95–LeadLagCentralHeatConguration3. Change the 4 mA water temperature to match the lowest wate

LAARS Heating SystemsPage 72 WARNINGImproper adjustment may lead to poor combustion quality, increasing the amount of carbon monoxide produced. Exc

NeoTherm LC Boilers and Water HeatersPage 73Required tools: Screwdrivers, Torx bits, combustion analyzerIn the rest of this section we will explain th

LAARS Heating SystemsPage 749. You can change the fan speed of the burner by adjusting the value entered for Firing Rate on the right side of the di

NeoTherm LC Boilers and Water HeatersPage 75turn the High Fire adjustment screw counter-clockwise. To lower the high re CO2 level, turn the screw cl

LAARS Heating SystemsPage 41.6 Appliance OverviewPressure andtemperaturegaugeBlower 1(under bezel)Automaticgas valvesManualgas valveBlower 2Touchscr

LAARS Heating SystemsPage 76 • Turn off the call for heat, and set both burners to run at 1200 RPM for low re. Turn on the call for heat, and che

NeoTherm LC Boilers and Water HeatersPage 774. Select Date and Time. Figure 107 shows the setup screen.Fig. 110 – Date and Time9.5 Setup for Domest

LAARS Heating SystemsPage 78Fig.113–Lead/LagMasterConguration Entries on this screen allow you to set the CH setpoint and DHW setpoint.4. Pre

NeoTherm LC Boilers and Water HeatersPage 794. Select that line by pressing it. If you want to change the DHW priority, the system will ask you to l

LAARS Heating SystemsPage 809.6 Gateway Connections to a Building Automation SystemNeoTherm LC boilers can be controlled and monitored through the

NeoTherm LC Boilers and Water HeatersPage 819.8 Installer ParametersThis is a list of all of the parameters which can be accessed using the Installer

LAARS Heating SystemsPage 82Label Description How to ReachCH (Central Heat) has priority over LL (Lead/Lag)This controls whether a local Central Heat

NeoTherm LC Boilers and Water HeatersPage 83Label Description How to ReachCH (Central Heat) SetpointThis setpoint is used when the time-of-day input i

LAARS Heating SystemsPage 84Label Description How to ReachDHW (Domestic Hot Water) pump controlThe DHW pump (Pump C) can be turned on manually, or it

NeoTherm LC Boilers and Water HeatersPage 85Label Description How to ReachLead lag D gainThis is part of the damping function (“Derivative”) used when

NeoTherm Boilers and Water HeatersPage 5Model 1700Pressure andtemperaturegaugeBlower 1(behind bezel)Automaticgas valvesManualgas valve (on back)Blower

LAARS Heating SystemsPage 86Label Description How to ReachLead lag on hysteresisWhen the Lead/Lag function is enabled, the control system will not r

NeoTherm LC Boilers and Water HeatersPage 87Label Description How to ReachModbus addressEach controller must have a unique Modbus address.<’home’ s

LAARS Heating SystemsPage 8811. Shut down the entire system and vent all radiation units and high points in the system piping, as described in Step

NeoTherm LC Boilers and Water HeatersPage 89 CautionIf any odor of gas is detected, or if the gas burner does not appear to be functioning in a norma

LAARS Heating SystemsPage 90Section 11MAINTENANCE WARNINGDisconnect all power to the unit before attempting any service procedures. Contact with ele

NeoTherm LC Boilers and Water HeatersPage 91power supply to the boiler. Turn off all manual gas valves connecting the boiler to the main gas supply li

LAARS Heating SystemsPage 9211.2.7 BlowerThe combustion air blower is a high-pressure centrifugal blower with a variable speed motor. The speed of t

NeoTherm LC Boilers and Water HeatersPage 9311.2.10 Natural/Propane Gas ConversionNeoTherm LC’s can easily be converted from natural to propane gas o

LAARS Heating SystemsPage 94Section 12TROUBLESHOOTING12.1 Potential Setup and Synchronization ProblemsBecause the NeoTherm LC uses a sophisticated

NeoTherm LC Boilers and Water HeatersPage 9512.1.2 Flap Valve Status CheckEach boiler includes two burners, and each burner has a ap valve. See Fi