Laars NTV Installation And Operation Instructions Manual

Neotherm

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Installation and operation instructions manual (96 pages)

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Page 1 Model NTH Sizes 285–850 MBTU/h Water Heater Model NTV Sizes 150–850 MBTU/h FOR YOUR SAFETY: This product must be installed and serviced by a professional service technician, qualified in hot water boiler and heater installation and maintenance. Improper installation and/or operation could create carbon monoxide gas in flue gases which could cause serious injury, property damage, or death.
Page 2: Table Of Contents
6A.5 NTH Suggested Piping Schematics ....19 Dimensions ............6 6A.6 Recognized Chemicals ........19 Section 2 - Section 6B - Locating the Appliance Water Connections - NTV Water Heater 2.1 General Information .......... 8 6B.1 NTV Water Quality .......... 27 2.2 Locating Appliance for Correct Vent Distance 6B.2 Piping Requirements ........27 from Outside Wall or Roof Termination .....
Page 3 NeoTherm Boilers and Water Heaters Section 8 - Section 9 - Navigating the Touch Screen First Start Up and Adjustment 8.1 The Touch Screen ........35 9.1 Filling the Boiler System ......... 54 8.2 Using the Touch Screen ........ 35 9.2 First Operation ..........54 8.3 Verification Process for Safety-Related 9.3 Shutting Down the NeoTherm Unit ....55 Parameters ............
Page 4 LAARS Heating Systems...
Page 5: General Information
V = Volume Water (4-6) Size 1.1 Introduction 1 5 0 = 150,000 BTU/hr input, NTV only 1 9 9 = 199,000 BTU/hr input, NTV only This manual provides information necessary for the 2 1 0 = 210,000 BTU/hr input, NTV only...
Page 6: Appliance Overview
Page 2 LAARS Heating Systems 1.3 Appliance Overview - See Figures 1 through 6. EXHAUST VENT CONNECTION PRESSURE RELIEF VALVE GAS CONNECTION WATER INLET WATER OUTLET AIR INLET CONNECTION TOUCHSCREEN AIR PRESSURE SWITCH ON / OFF SWITCH DRAIN VALVE HEAT EXCHANGER GAS VALVE...
Page 7 Page 3 Boilers and Water Heaters HERM EXHAUST VENT CONNECTION WATER INLET PRESSURE RELIEF VALVE WATER OUTLET GAS CONNECTION AIR INLET CONNECTION TOUCHSCREEN ON / OFF SWITCH HEAT EXCHANGER MANUAL SHUTOFF DRAIN VALVE GAS VALVE CONDENSATE TRAP AIR/ GAS BLOWER GAS VALVE VENTURI Figure 4.
Page 8: Warranty
(See Figure 7) warranty registration at www.Laars.com. All warranty claims must be made at www.Laars.com. or to an A. Exhaust vent terminal (US only) authorized LAARS Heating Systems representative. Claims B. Air intake terminal...
Page 9 Page 5 Boilers and Water Heaters HERM WATER INLET GAS CONNECTION EXHAUST VENT PRESSURE RELIEF CONNECTION VALVE AIR INLET WATER OUTLET TOUCHSCREEN ON / OFF SWITCH GAS VALVE VENTURI DRAIN VALVE AIR/ GAS BLOWER MANUAL SHUTOFF GAS VALVE HEAT EXCHANGER CONDENSATE TRAP Figure 6.
Page 10: Dimensions
Page 6 LAARS Heating Systems 1.6 Dimensions All NeoTherm model dimensions are shown in Table 1 Size/Model 150 NTV 13¼ 34 5¼ 14 19 48 3¼ 8 10¾ 28 7½ 19 14¼ 36 19½ 49 7½ 19 15¼ 39 13 33 199 NTV 20½...
Page 11 Page 7 Boilers and Water Heaters HERM...
Page 12: Locating The Appliance
Page 8 LAARS Heating Systems Section 2 - LOCATING THE APPLIANCE 2.1 General Information APPLIANCE SUGGESTED SERVICE ACCESS CLEARANCE SURFACE INCHES The NeoTherm unit is designed for indoor installations Left Side only. Right Side The appliance should be located to provide clearances on all sides for maintenance and inspection.
Page 13: Venting And Combustion Air
The manufacturers and product lines listed on the following tables have been tested and authorized Installations must comply with applicable national, state and to safely operate with Laars equipment. Suppliers of stainless local codes. steel and polypropylene venting that are not listed on these tables are not permitted for use with Laars vent category III/ IV products.
Page 14: Combustion Air
Page 10 LAARS Heating Systems Combustion Air From Room of all equipment in the enclosure. When communicating to the outdoors through horizontal ducts, each opening shall In the United States, the most common requirements specify have a minimum free area of not less than 1 square inch per...
Page 15: Venting
When taken from the wall, it must be taken from supplied for ventilation, including air required for comfort out-of-doors by means of the LAARS horizontal wall and proper working conditions for personnel. Refer to the terminal, kit, See Table 6.
Page 16 However, if one is not available with the certified vent system, Laars suggests using a tee with the hardware and controls to properly balance flue gas branch connection sized to allow for insertion of a flue gas pressures.
Page 17: Locating Vent & Combustion Air Terminals
An exhaust vent terminal must be installed. If an exhaust vent compounds, etc.) terminal is not available with the certified vent system, Laars Locate the terminal so that it will not be subject to suggests the use of a coupler fitting from the certified vent damage by accident or vandalism.
Page 18 Page 14 LAARS Heating Systems U.S. Installations (see note 1) Canadian Installations (see note 2) A= Clearance above grade, veranda, porch, 12 inches (30 cm) 12 inches (30 cm) deck, or balcony See note 6 See note 6 B= Clearance to window or door that may be Direct vent only: 12 inches (30cm);...
Page 19 Page 15 Boilers and Water Heaters HERM a. In the event that the side-wall horizontally vented gas fueled equipment is installed in a crawl space or an attic, the hard-wired carbon monoxide with alarm and battery back-up may be installed on the next adjacent floor level. b.
Page 20: Common Vent Test
Page 16 LAARS Heating Systems Section 4 - 3.5 Common Vent Test GAS SUPPLY AND PIPING NOTE: This section does not describe a method for common venting NeoTherm units. It describes what must be done when a unit is removed from a common Gas piping should be supported by suitable hangers or floor vent system.
Page 21: Pump Requirements
Page 17 Boilers and Water Heaters HERM Section 5 - NEOTHERM NATURAL GAS PUMP REQUIREMENTS REQUIRED CU FT SIZE / HR. TO SIZE PIPING: 5.1 NeoTherm Boiler Flow and Head Measure linear distance from meter outlet to last boiler. Add total input of all boilers and divide Requirements by 1000 to obtain cu ft / hr required.
Page 22: Section 6A
6A covers NTH units designed for hydronic temperature with multiple boilers, pipe as shown in Figures 17-19. heating. Section 6B covers NTV models, which NeoTherm NTV models 150-500 can be ordered with or are designed exclusively for “volume water” without a pump included.
Page 23: Condensate Drain
Page 19 Boilers and Water Heaters HERM 6A.3 Condensate Drain NOTE: Laars supplied pumps are not all capable of maintaining the reduced temperature rise required A condensate drain trap is built into the NeoTherm unit. with glycol concentrations greater than 35%. If glycol Connect a 3/4”...
Page 24 Page 20 LAARS Heating Systems Figure 16. Hydronic Piping — Single Boiler, Zoning with Circulators...
Page 25 Page 21 Boilers and Water Heaters HERM Figure 17. H ydronic Piping — Single Boiler, Low Temp Radiant Space Heating Using Low Loss Header and Zone Valves...
Page 26 Page 22 LAARS Heating Systems Figure 18. Hydronic Piping — Multiple Boilers, Zoning with Circulators...
Page 27 Page 23 Boilers and Water Heaters HERM Figure 19. Hydronic Piping — Multiple Boilers with Indirect DHW Tank Piped from System Loop...
Page 28 Page 24 LAARS Heating Systems Figure 20. Hydronic Piping — Multiple Boilers, Reverse Return, Multi-Temp Zones, Zoning with Circulators...
Page 29 Page 25 Boilers and Water Heaters HERM Figure 21. Hydronic Piping — Heating Zones with Indirect DHW Tank Piped with Zone Pumps The indirect DHW tank is piped directly off of the boiler. The boiler pump must shut down during DHW operation.
Page 30 Page 26 LAARS Heating Systems Figure 22. Hydronic Piping, Multiple Boilers with Indirect DHW Off of One Boiler The boiler pump must shut down during DHW operation.
Page 31: Section 6B
Pipe the discharge of the relief valve (full size) to the drain or of 10gpg hardness or less with a pH range of 8.2 to 9.5. Operating the NTV in water with higher hardness levels will in a manner to prevent injury in the event of pressure relief.
Page 32: Cold Water Make-Up
6B.7 NTV Suggested Pumps A condensate drain trap is built into the NeoTherm unit. Possible pumps for NTV sizes 600-850 are Grundfos model Connect a 3/4” PVC pipe between the drain connection and TP 40-160/2B, or for size 600 (only) is Armstrong model a floor drain (or a condensate pump if a floor drain is not E22B.
Page 33 HERM NOTES: 1. Optional CWMU & Recirc. line location. 2. Locate NTV DHW sensor or remote aquastat well in lower 1/3 of tank. 3. Back flow preventer may be required - check local codes. 4. Thermal expansion tank may be required - check local codes.
Page 34 Page 30 LAARS Heating Systems NOTES: 1. Optional CWMU & Recirc. line location. 2. Locate NTV DHW sensor or remote aquastat well in lower 1/3 of tank. 3. Back flow preventer may be required - check local codes. 4. Thermal expansion tank may be required - check local codes.
Page 35: Installation Warnings
(This can also be 0-10Vdc using a converter - Laars part number CA006100.) When setting up The NeoTherm unit does not recognize 4mA as a a system using an external control, take care to set Anti-Short signal to shut off.
Page 36 Page 32 LAARS Heating Systems Figure 27. Control Panel Layout WATER HEATER SIZES VOLTS PHASE AMPS BOILER PUMP CONNECTIONS 199-500 Single RATINGS No pump SIZES VOLTS PHASE AMPS (Boiler, System Pump and DHW Pump Connections) Single With pump 199–850 Single 115V – Maximum 1HP No Pump or 7.4A max...
Page 37: Optional Field Connection
Modbus ports. The Modbus wiring should be completed according to the diagrams shown below. If alternate communication protocols are desired, Laars offers “gateways” to allow BACnet, LON, and other communications protocols. For additional information on setting up Modbus and other communication protocols, contact the factory.
Page 38 Page 34 LAARS Heating Systems R/BLK DKB/Y DKB/Y TRANSFORMER 110VAC INPUT 24VAC OUTPUT GY/WH Figure 31. Wiring Diagram, All Sizes...
Page 39: Navigating The Touch Screen
Page 35 Boilers and Water Heaters HERM Section 8 Navigating the Touch Screen The home screen shows a picture of the NeoTherm controller. The color of the controller depends on the status of the NeoTherm, as shown below. Color Status Control Touch Screen Icon...
Page 40 Page 36 LAARS Heating Systems Screen Menu Icons (For some special safety-related functions, besides entering the correct password, the system will ask you to go through an additional “verification” process. For more information, see the section on “Configuration.”) There are several icons at the top of the Touch Screen...
Page 41: Verification Process For Safety-Related Parameters
Page 37 Boilers and Water Heaters HERM surface of the screen.) Press OK to continue. The system will ask you to login before you make a change. (For more Each time you press a key, the system will respond information on logging in, see Section 8.2.) with a beep.
Page 42 Page 38 LAARS Heating Systems 8.4 Checking Individual Parameters From the ‘Home’ screen (Menu 9), press the icon for the controller. Menu 7. Safety Parameter Confirmation For each group, check the list carefully. Press Yes if all of the parameters in the group have Menu 9.
Page 43: Configuring Parameters On Individual
Page 39 Boilers and Water Heaters HERM 8.5 Configuring Parameters In this section, we will give you a quick explanation of how to change parameters on the controller. From the Home Page screen (Menu 11), press the icon for the controller. Menu 11. Home Page Screen The Status Summary page for that controller Menu 13.
Page 44: Setting The Date And Time
Page 40 LAARS Heating Systems 8.6 Setting the Date and Time on the System Display The display includes an internal clock, which keeps track of the date and time. This setting is important, because log entries for Lockouts and Alerts include time listings. If the Date and Time setting for the boiler is not correct, the listings in the Lockout and Alert logs will be incorrect.
Page 45: Configuration Menus (All)
Page 41 Boilers and Water Heaters HERM 8.7 Configuration Sub-Menus (ALL) 8.7.1 through 8.7.15 are the Configuration Sub-Menus. 8.7.1 System Identification & Access Menu 18. Home Screen To navigate to the Configuration Menu Screen, first touch the controller icon on the home screen to access the Status This sub-menu will display information regarding software, Summary screen, date codes, model numbers and program name, as well as giving the installer access to re-name the boiler and to change...
Page 46: Dhw - Domestic Hot Water Configuration
DHW - Domestic Hot Water is used to configure the DHW NeoTherm is designed with a 5:1 turn down ratio. Any temperature parameters for water heaters (NTV) and for indirect water heaters that are used with boiler (NTH) systems. change to the minimum and maximum modulation rates will affect the overall ratio of the boiler.
Page 47: Statistics Configuration
Page 43 Boilers and Water Heaters HERM 8.7.8 Pump Connections (cont) 8.7.10 High Limits The System pump connections are located on terminal block 5 (TB5) in the control panel. The System pump contacts are rated for 120Vac, 7.4 Amps. To use the contacts, power must be supplied on one terminal with the other terminal wired to the pump or a relay controlling the pump.
Page 48: Frost Protection Configuration
Page 44 LAARS Heating Systems 8.7.13 Frost Protection 8.7.15 Fan Configuration To increase/decrease the speed at which the fan control loop reacts to a decrease in fan speed, adjust the Fan gain down parameter. Similarly, to increase/decrease the speed at which the fan control loop reacts to an increase in fan speed, adjust the Fan gain up parameter.
Page 49: About Lead / Lag
Page 45 Boilers and Water Heaters HERM About Lead/Lag Operation Caution About Lead/Lag Operation - You should set the Modbus addresses before If an installation includes two or more boilers, they you connect the Modbus wiring. If the wiring may be set up for “Lead/Lag” operation. One boiler is attached before the Modbus addresses on will be set up as the “Master”, and the others will the controls are changed, there will be multiple...
Page 50 Page 46 LAARS Heating Systems Base load value Number of boilers installed Low demand - The first boiler in sequence fires at less than 65% Demand increases - Once the first boiler reaches 65%, the second boiler switches on, and Figure 38.
Page 51: Lead Lag Slave Configuration
Page 47 Boilers and Water Heaters HERM 8.7.17 Lead/Lag Slave Configuration Menu 21. Home Screen On the boilers, touch the controller Icon on the Home Screen. Menu 23. Configuration Menu, Scroll down and select ‘Lead Lag Slave Configuration’. Menu 22. Status Summary Screen Select ‘Configure’. In the Lead Lage Slave Sub-Menu, Identify each unit (including the Lead/Lag Master) as a slave by turning on “Slave Enable.”...
Page 52 Page 48 LAARS Heating Systems 8.7.18 Lead Lag Master Configuration You will be prompted to sign in. This can be done by pressing the ‘LOCK’ symbol at the top right Then set up the Master controller by going to the Lead Lag Master boiler and opening up the Lead Lag Master Configuration in that boilers Configuration Menu.
Page 53: Lead Lag Master Configuration
Modbus ports. The Modbus Controller wiring must be completed according to the diagrams shown below. If alternate communication protocols are desired, LAARS offers “gateways” to allow BACnet, Operator LON, and other communications protocols. For interface MB1 MB2...
Page 54: Combustion Setup
Page 50 LAARS Heating Systems 8.10.1 – Combustion Setup Procedure In this section, we will explain how to set up the gas valve so the boiler will run efficiently at both the High Fire and Low Fire conditions. Required tools: Screwdrivers, Torx bits, Allen...
Page 55 Page 51 Boilers and Water Heaters HERM Auto at the end of the test. Manual in Run - The Manual in Run control will only set the fan speed when the control has proven flame and the unit has entered the Run mode. Manual in Run and Standby - Using this setting, the manual control will set the fan speed whether the boiler is operating or not.
Page 56: Adjusting Co2
Page 52 LAARS Heating Systems 8.10.2 – Adjusting CO See Section 8.10 GAS TYPE HIGH FIRE, CO LOW FIRE, CO DIFFRNTL PRESSURE (inches wc) Natural 8.8 to 9.8% 0.5% lower than 3.6” to 3.9” high fire setting Propane 9.8 to 10.2% Table 16. (Residential, sizes 150 - 285 Mbtu) Range and Differential Pressure...
Page 57 Page 53 Boilers and Water Heaters HERM Table 18. NeoTherm Boiler Efficiencies Inlet gas pressure High re CO adjustment (under cap) pressure Low re CO adjustment Outlet gas pressure Inlet gas Low re CO pressure adjustment High re CO adjustment (under cap) 750, 850 Outlet Gas Outlet Pressure...
Page 58: First Start Up And Adjustment
WARNING for a minimum of 30 minutes with the gas shut off. Do not use this appliance if any part has been under water. Laars Heating Systems requires boilers and WARNING water heaters to be replaced, not repaired, if they Failure to remove all air from the heat exchanger have been partially or completely submerged.
Page 59: Shutting Down The Neotherm Unit
Page 55 Boilers and Water Heaters HERM 9.3 Shutting Down the NeoTherm Unit label and turn on the gas and electrical power to the appliance. Turn off the main electrical disconnect switch. The NeoTherm unit will begin the start sequence. Close all manual gas valves. The blower and pump will energize for the pre-purge If you think the NeoTherm unit might freeze, drain it.
Page 60: Maintenance
120 Volt power. Place the unit in operation following the Component Description instructions in Section 9. Once the boiler is operating. check Use only genuine LAARS replacement parts. for leaks again and confirm that all fasteners are tight. Check the appliance setup according to Section 9.
Page 61 Page 57 Boilers and Water Heaters HERM factory for proper trouble shooting practices prior to replacing of the boiler to gain access to the ignitor assembly. Remove the control. If control replacement is required, turn off all the two wires connected to the assembly. Then remove the power to the appliance and shut off all manual gas valves two bolts connecting the ignitor assembly to the burner door.
Page 62 Page 58 LAARS Heating Systems Caution WARNING The ignitor and sensor may be hot, and can cause Black carbon soot buildup on a dirty heat exchanger burns or injury. can be ignited by a random spark or flame. To prevent...
Page 63: Gas Conversion
CA008600 gas valve adjustment. Other units require no additional parts CA008600 - only proper gas valve adjustment. Please contact the Laars CA008600 factory for specific information regarding the gas conversion CA008600 of a particular appliance.
Page 64: Troubleshooting
Page 60 LAARS Heating Systems Section 11 TROUBLESHOOTING Lockout will appear in an orange bar across the bottom of the screen. If you tap the orange bar, 11.1 Lockouts, Holds, and Alerts the system will present more information about The control system on the NeoTherm responds to the Lockout.
Page 65 Page 61 Boilers and Water Heaters HERM 3. Press the long Yellow Alert or Yellow Lockout If you choose ‘LOCKOUTS’, this menu will appear. Bar (the long bar will be a long Grey ‘History’ Bar if not currently in Alert or Lockout). Menu 5.
Page 66: Troubleshooting Table
Page 62 LAARS Heating Systems 11.2 Troubleshooting Table This table includes a listing of the fault codes that may be displayed. Some of these can be corrected by changing a parameter, while other conditions are more complicated, and will require a service technician.
Page 67 Page 63 Boilers and Water Heaters HERM Internal fault: H or L Internal fault PII (Pre-Ignition 1. Reset module Interlock) 2. If fault repeats, replace module. shorted to ILK (Interlock) Internal fault: Internal fault Safety relay test 1. Reset module failed due to 2.
Page 68 Page 64 LAARS Heating Systems Internal fault: Internal fault Flame rod 1. Reset module shorted to 2. If fault repeats, replace module. ground detected Internal fault: Internal fault A/D linearity 1. Reset module test fails 2. If fault repeats, replace module.
Page 69 Page 65 Boilers and Water Heaters HERM Fan speed not Will not be a lockout fault. Hold Only. proved LCI (Limit 1. Check wiring and correct any faults. Control Input) 2. Check Interlocks connected to the LCI to assure proper function. 3.
Page 70 Page 66 LAARS Heating Systems Header sensor 1. Check wiring and correct any possible errors. fault 2. Replace the header sensor. 3. If previous steps are correct and fault persists, replace the module. Stack sensor 1. Check wiring and correct any possible errors.
Page 71 Page 67 Boilers and Water Heaters HERM Ignition failed 1. Check main valve wiring and operation - correct any errors. 2. Check the fuel supply. 3. Check fuel pressure and repeat turndown tests. 4. Check ignition transformer electrode, ﬂ ame detector, ﬂ ame detector siting or ﬂ...
Page 72 Page 68 LAARS Heating Systems Flame detected H or L Holds if ﬂ ame detected during Safe Start check up to Flame Establishing period. Flame not Sequence returns to standby and restarts sequence at the beginning of detected Purge after the HF switch opens if ﬂ ame detected during Safe Start check up to Flame Establishing period.
Page 73 Page 69 Boilers and Water Heaters HERM Block intake OFF 1. Check wiring and correct any errors. 2. Inspect the Block Intake Switch to make sure it is working correctly. 3. Reset and sequence the module. 4. During Standby and Purge, measure the voltage across the switch. Supply voltage should be present.
Page 74 Page 70 LAARS Heating Systems Invalid igniter 1. Return to Conﬁ guration mode and recheck selected parameters, on during setting reverify and reset module. 2. If fault repeats, verify electrical grounding. 3. If fault repeats, replace module. Invalid ignite 1. Return to Conﬁ guration mode and recheck selected parameters, failure delay reverify and reset module.
Page 75 Page 71 Boilers and Water Heaters HERM Invalid MFEP 1. Return to Conﬁ guration mode and recheck selected parameters, (Main Flame reverify and reset module. Establishing 2. If fault repeats, verify electrical grounding. Period) ﬂ ame 3. If fault repeats, replace module. failure response setting Invalid NTC...
Page 76 Page 72 LAARS Heating Systems Invalid Run 1. Return to Conﬁ guration mode and recheck selected parameters, stabilization reverify and reset module. time setting 2. If fault repeats, verify electrical grounding. 3. If fault repeats, replace module. Invalid Stack 1. Return to Conﬁ guration mode and recheck selected parameters, limit enable reverify and reset module.
Page 77 Page 73 Boilers and Water Heaters HERM Invalid 1. Return to Conﬁ guration mode and recheck selected parameters, Modulation reverify and reset module. output setting 2. If fault repeats, verify electrical grounding. 3. If fault repeats, replace module. Invalid CH 1.
Page 78: Diagnostic Tests And Input/Output Indicators
Page 74 LAARS Heating Systems 11.3 Diagnostic Tests and Input/ Output Indicators Two kinds of screens are grouped together in this section: • Detailed indications of the input and output signals • Diagnostic tests of the pumps and burner modulation Note that these functions apply to just one selected controller.
Page 79: Lead/Lag Slave Diagnostics
Page 75 Boilers and Water Heaters HERM 11.4 Lead/Lag Slave Diagnostics The control system includes a diagnostic screen that lists some information on the Lead/Lag slaves in the system. See Menu 13 Menu 15. Analysis Setup Screen To use this function, select the parameter you want to track from the pull-down list.
Page 80: Operating Sequence
Page 76 LAARS Heating Systems 11.8 Operating Sequence Select one of the controllers listed on the right side When there is a call for heat, the unit will close of the screen. Press one of the buttons below the pump contacts to energize the customer supplied right column to see the snapshot.
Page 81: Replacement Parts
12.1 General Information To order or purchase parts for the LAARS NeoTherm, contact your nearest LAARS dealer or distributor. If they cannot supply you with what you need, contact Customer Service. (See the back cover for the address, telephone and fax numbers.) 12.2 Parts List...
Page 82 Page 78 LAARS Heating Systems SIZE SIZE SIZE SIZE SIZE SIZE SIZE ITEM DESCRIPTION NTH 210 NTH 285 NTH 399 NTH 500 NTH 600 NTH 750 NTH 850 NTV 199 NTV 285 NTV 399 NTV 500 NTV 600 NTV 750 NTV 850 Heat Exch.
Page 83 SIZE SIZE ITEM DESCRIPTION NTH 210 NTH 285 NTH 399 NTH 500 NTH 600 NTH 750 NTH 850 NTV 199 NTV 285 NTV 399 NTV 500 NTV 600 NTV 750 NTV 850 Inlet Water Temp Sensor RE2320600 RE2320600 RE2320600 RE2320600...
Page 84: Parts Illustrations
Page 80 LAARS Heating Systems Parts Illustration 1. Jacket Components...
Page 85: Parts Illustrations
Page 81 Boilers and Water Heaters HERM Parts Illustration 2. I nternal Components, Parts Illustration 3. I nternal Components, Sizes 150–210 Sizes 285–600...
Page 86 Page 82 LAARS Heating Systems Parts Illustration 4. Internal Components, Sizes 750-850...
Page 87 Page 83 Boilers and Water Heaters HERM Sizes 150-285 Parts Illustration 5. Gas Train Components, Sizes 150-500...
Page 88 Page 84 LAARS Heating Systems Parts Illustration 6. Gas Train Components, Sizes 600-850...
Page 89 Page 85 Boilers and Water Heaters HERM Sizes 285 - Parts Illustration 7. Heat Exchanger Components...
Page 90 Page 86 LAARS Heating Systems (Front) Touchscreen (Back) Battery ( CR2032 ) Parts Illustration 8. Electrical Components...
Page 91 Page 87 Boilers and Water Heaters HERM Notes:...
Page 92 Dimensions and specifications subject to change without notice in accordance with our policy of continuous product improvement. 800.900.9276 • Fax 800.559.1583 Customer Service and Product Support: Industrial Way, Rochester, NH 03867 • 603.335.6300 • Fax 603.335.3355 Headquarters: 1869 Sismet Road, Mississauga, Ontario, Canada L4W 1W8 • 905.238.0100 • Fax 905.366.0130 www.Laars.com Printed in U.S.A. © Laars Heating Systems 1510 Document 1330A...

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Nth

Laars NTV Installation And Operation Instructions Manual

Section 1

General Information

Section 2

Locating the Appliance

Section 3

Venting and Combustion Air

Section 4

Gas Supply and Piping

Section 5

Pump Requirements

Section 6A

Water Connections - NTH Boiler

Section 6B

Water Connections - NTV Water Heater

Electrical and Wiring Diagrams

Section 7

Section 8

Navigating the Touch Screen

Configuration Menus (ALL)

About Lead / Lag

Combustion Setup

Section 9

First Start up and Adjustment

Section 10

Maintenance

Section 11

Troubleshooting

Section 12

Replacement Parts

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Troubleshooting

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