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Page 33

HERM

Boilers and Water Heaters

Figure 30.

Ladder Diagram

Connections for External Control -

Connect the 4-20mA signal from an external control or

building automation system to terminal block 7 (TB7) in

the control panel. The connections are labeled Remote

Analog Input. When making the connections, follow the

polarity designations shown on the label.

Terminal block 8 (TB8) in the control panel can be used

for connecting optional components, such as low water

cutoffs, flow switches, additional high limits and other

field-supplied devices that must be interlocked with

the boiler. These are non-powered dry contacts only.

All safeties or end switches must be wired in series by
removing the supplied jumpers.

7.6 Connections to a

Building Automation System

NeoTherm boilers can be controlled and monitored
through the included 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.

Signals from a Building Automation System can be

connected to the MB2 Modbus connections on the

controller. See Figure 28. (MB1 is used to connect to the

Operator Interface (UI).
If multiple boilers are connecting in a cascading Lead/ Lag

arrangement, the signals from the Building Automation

System must be brought in through a System Display.

See Figure 29.

7.7 Ladder and Wire Diagrams

See Figure 30 and Figure 31

Содержание NTV

Страница 1: ...as in flue 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 don...

Страница 2: ...er 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 Pro...

Страница 3: ...35 8 2 Using the Touch Screen 35 8 3 Verification Process for Safety Related Parameters 37 8 4 While Operating Checking Individual Parameters 38 8 5 Configuring Parameters on Individual Controllers 3...

Страница 4: ...LAARS Heating Systems...

Страница 5: ...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 Natura...

Страница 6: ...AS 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 TOUCH...

Страница 7: ...NLET 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 TO...

Страница 8: ...ccessory 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 short...

Страница 9: ...zes 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...

Страница 10: ...15 38 20 51 20 52 19 48 26 66 18 48 13 33 500 NTV 30 77 5 13 19 50 4 11 15 38 20 51 20 52 19 48 26 66 18 48 13 33 600 both 29 76 5 13 19 50 4 11 15 38 20 51 3 8 19 48 26 66 18 48 8 21 750 both 35 90...

Страница 11: ...Page 7 NEOTHERM Boilers and Water Heaters...

Страница 12: ...hen located on the same wall the NeoTherm combustion air intake terminal must be installed a minimum of 12 below the exhaust terminal Models 399 850 also require a minimum horizontal distance from int...

Страница 13: ...2SVSTTAxx ID Horizontal Termination bird screen 9x92 FSBSx 2SVSTPXxx Vertical Termination rain cap 5X00CI FSRCx 2SVSRCxx Inlet Air Termination 9xTERM FSAIHXX 2SVSTEXxx90 Adapter SS to CPVC FSA xxFNSM...

Страница 14: ...based upon the intended application of the boiler Single wall galv steel 26 gauge PRO TECH FasNSeal HEAT FAB Saf T Vent Z FLEX Z Vent SIZE Boiler Flue Intake Air Boiler Intermediate Flue Intake Air Bo...

Страница 15: ...roof or through an outside wall When using PVC CPVC for vent material venting must be Figure 10 Combustion Air and Vent Through Roof INSTALLATION STANDARDS MATERIAL UNITED STATES CANADA Stainless Ste...

Страница 16: ...two items listed in the Unpacking section Figure 7 are not included with NeoTherm units for Canada underlined A exhaust vent terminal not included B air intake terminal C temperature pressure gauge k...

Страница 17: ...en installing the terminal See Figure 13 throuFigure 15 1 Do not locate the air inlet terminal near a source of corrosive chemical fumes e g cleaning fluid chlorine compounds etc 2 Locate the terminal...

Страница 18: ...outlet See note 4 3 feet 91 cm J Clearance to nonmechanical air supply Direct vent only 12 30cm 80 285 36 91cm inlet to building or the combustion air inlet 399 850 Other than Direct vent 4 ft 1 2m b...

Страница 19: ...level b In the event that the requirements of the subdivision cannot be met at the time of completion of installation the owner shall have a period of thirty 30 days to comply with the above requirem...

Страница 20: ...it is removed from a common vent system NeoTherm units require special vent systems and fans for common vent Contact the factory if you have questions about common venting NeoTherm units When an exist...

Страница 21: ...al equivalent length of fittings used according to Table 8 Align total length pipe and fittings on left side column of Table 9 with highest cubic feet of gas required Notes Consult and confirm with Ap...

Страница 22: ...n of the boiler water during the cooling cycle A boiler installed above radiation level or as required by the authority having jurisdiction must be provided with a low water cutoff device either as a...

Страница 23: ...of freezing in the boiler or in the pipes in the system When water freezes it expands which may result in bursting of pipes or damage to the boiler which could result in leaking or flooding conditions...

Страница 24: ...Page 20 LAARS Heating Systems Figure 16 Hydronic Piping Single Boiler Zoning with Circulators...

Страница 25: ...Page 21 NEOTHERM Boilers and Water Heaters Figure 17 Hydronic Piping Single Boiler Low Temp Radiant Space Heating Using Low Loss Header and Zone Valves...

Страница 26: ...Page 22 LAARS Heating Systems Figure 18 Hydronic Piping Multiple Boilers Zoning with Circulators...

Страница 27: ...Page 23 NEOTHERM Boilers and Water Heaters Figure 19 Hydronic Piping Multiple Boilers with Indirect DHW Tank Piped from System Loop...

Страница 28: ...Page 24 LAARS Heating Systems Figure 20 Hydronic Piping Multiple Boilers Reverse Return Multi Temp Zones Zoning with Circulators...

Страница 29: ...ilers and Water Heaters 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 du...

Страница 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...

Страница 31: ...n 6A covers NTH units designed for hydronic heating Section 6B covers NTV models which are designed exclusively for volume water domestic hot water applications Refer to the proper section for instruc...

Страница 32: ...e floor drains and or pipes particularly those that are metal Ensure that the drain drainpipe and anything that will come in contact with the condensate can withstand the acidity or neutralize the con...

Страница 33: ...ack flow preventer may be required check local codes 4 Thermal expansion tank may be required check local codes 5 Factory mounted pumps are sized for a max pipe length of 30 total 6 90 elbows full pip...

Страница 34: ...on water hardness at job site WARNING This drawing shows suggested piping configuration and valving Check with local codes and ordinances for additional requirements NOTES 1 Optional CWMU Recirc line...

Страница 35: ...loors and could be electrocuted by an ungrounded boiler Electrocution can result in severe injury or death Single pole switches including those of safety controls and protective devices must not be wi...

Страница 36: ...aximum 1HP No Pump or 7 4A max 199 500 Less With Pump 120 Single than 115V Maximum 1HP 6 or 7 4A max Minimum 15A circuit required Table 14 NTH Electrical Data Figure 27 Control Panel Layout Figure 29...

Страница 37: ...by removing the supplied jumpers 7 6 Connections to a Building Automation System NeoTherm boilers can be controlled and monitored through the included Modbus ports The Modbus wiring should be complete...

Страница 38: ...R Y BRN BRN WH WH R TO TB2 PIN2 TO XFORMER WH TO TB1 PIN2 TO XFORMER BLK FLOW SWITCH R ADD L HIGH LIMIT BL Y GR BL GR VT WH GY FIELD INSTALLED OPTIONS LOW WATER CUTOFF GY R BLK BLK Y WH WH VT GY BL Y...

Страница 39: ...under normal operation the Touch Screen will automatically present this Home screen See Menu 1 Menu 1 Home Screen Menu 2 Status Summary The home screen shows a picture of the NeoTherm controller The...

Страница 40: ...lower case LNT User Level no password required Non critical adjustments and functions including adjusting the Central Heat and Domestic Hot Water setpoints monitoring the input and output variables re...

Страница 41: ...or more information on logging in see Section 8 2 2 If you make a change in any group that could affect the safe operation of the unit the control system will ask you to verify the change before it is...

Страница 42: ...ill be cancelled A count down timer is shown at the bottom of the screen 8 4 Checking Individual Parameters 1 From the Home screen Menu 9 press the icon for the controller Menu 9 Home screen 2 The Sta...

Страница 43: ...Home Page screen Menu 11 press the icon for the controller Menu 11 Home Page Screen 2 The Status Summary page for that controller will appear See Menu 12 Menu 12 Status Summary Screen 3 Press the Con...

Страница 44: ...n Menu 14 Home screen 2 Press the Setup button on the lower right corner of the screen The system will present the Setup screen Menu 15 Setup Screen 3 Press the Display Setup button at the bottom of t...

Страница 45: ...ion regarding software date codes model numbers and program name as well as giving the installer access to re name the boiler and to change the modbus addresses for lead lag operation 8 7 2 CH Central...

Страница 46: ...ulation Configuration From this sub menu the installer has the ability to adjust the range of modulation for the CH and DHW demands NeoTherm is designed with a 5 1 turn down ratio Any change to the mi...

Страница 47: ...rminal wired to the pump or a relay controlling the pump Additional 120VAC circuits may be required for the pumps 8 7 9 Statistics Configuration The statistics configuration sub menu allows the instal...

Страница 48: ...the time allowed for an alarm to sound before being silenced 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 gai...

Страница 49: ...Lead Lag Master A Run sequence is initiated when the system temperature falls to the Lead Lag Central Heat setpoint Actually this is the LL CH setpoint less the On Hysteresis value The default settin...

Страница 50: ...the heating demand increases so that the firing rate of that first boiler rises to your boiler configurations Base Load Value see Figure 37 the next boiler in the sequence will start up and begin fir...

Страница 51: ...Slave Configuration In the Lead Lage Slave Sub Menu Identify each unit including the Lead Lag Master as a slave by turning on Slave Enable 8 7 17 Lead Lag Slave Configuration Menu 21 Home Screen On th...

Страница 52: ...oor lock and then opening the doors The wiring from the controller on the first boiler runs to the controller on the next boiler Use 22 AWG or thicker shielded twisted pair wire with drain Two twisted...

Страница 53: ...S 485 Figure 40 BAS connnections to a Lead Lag System Lead or master boiler Controller Controller Master System display TB3 24VAC TB4 NEU Operator interface HMI Customer communication RS 485 MB1 MB1 M...

Страница 54: ...em will present the Status Summary screen Menu 26 Status Summary Screen 4 Press the Configure button in the lower left corner Menu 27 Configuration Menu 5 NeoTherm is equipped with a zero governing ne...

Страница 55: ...turn the High Fire adjustment screw counter clockwise To lower the high fire CO2 level turn the screw clockwise 9 Repeat step 8 except this time set the fan speed RPM to 1200rpm Again the actual RPM w...

Страница 56: ...esidential sizes 150 285 Mbtu CO2 Range and Differential Pressure GAS TYPE HIGH FIRE CO2 LOW FIRE CO2 MANIFOLD PRESSURE Natural 8 8 to 9 0 0 5 lower than 005 to Propane 9 8 to 10 0 high fire setting 0...

Страница 57: ...ire CO2 adjustment under cap Gas pressure tap Low fire CO2 adjustment Outlet gas pressure Inlet gas pressure Low fire CO2 adjustment High fire CO2 adjustment under cap Outlet gas pressure Gas pressure...

Страница 58: ...l air has been bled from both Open all valves 3 Observe all warnings on the Operating Instructions Section 9 First Start Up and Adjustment 9 1 Filling the Boiler System 1 Ensure the system is fully co...

Страница 59: ...will start The appliance will return to its previous mode of operation DANGER If you detect any odor of gas or if the gas burner does not appear to be functioning in a normal manner CLOSE THE MAIN SH...

Страница 60: ...ol f Flow switch b Automatic gas valve g Low water cutoff c Pressure switches h Burner d Blower i Heat exchanger e Pump Burner Check the burner for debris Remove the blower arm assembly to access the...

Страница 61: ...tor assembly is a two rod system that consists of a ground rod and a spark rod See Figure 47 To remove the ignitor assembly shut off the 120 Volt power supply to the appliance Turn off all manual gas...

Страница 62: ...t the electrical supply to the unit and turn off the gas supply by closing the manual gas valve on the unit Access the heat exchanger through the burner door at the front of the boiler and inspect the...

Страница 63: ...the high gas pressure switch to 14 10 3 Gas Conversion NeoTherm units can easily be converted from natural to propane gas or from propane to natural gas in the field Some units require the addition o...

Страница 64: ...artup This indicates that the control system is waiting for a condition to be satis ed No Reset is required to recover from an alert The system maintains a history of the 15 most recent alerts Sometim...

Страница 65: ...of the last 15 Lockout occurances Press Alerts to bring up a list of the last 15 Alerts and Silence Alarm in the event of a lockout condition By silencing the alarm the audible alert has been disable...

Страница 66: ...n guration verify safety parameters and reset device to complete veri cation 3 If fault repeats replace module 3 Internal fault Hardware fault H Internal fault 1 Reset module 2 If fault repeats replac...

Страница 67: ...nal fault Safety RAM write L Internal fault 1 Reset module 2 If fault repeats replace module 20 Internal fault Internal fault Flame ripple and over ow H Internal fault 1 Reset module 2 If fault repeat...

Страница 68: ...t ickering H Internal fault 1 Reset module 2 If fault repeats replace module 49 24 VAC voltage low high H 1 Check the module and display connections 2 Check the module power supply and make sure that...

Страница 69: ...f fault repeats replace module 78 Demand Lost in Run H 1 Check wiring and correct any possible errors 2 If previous steps are correct and fault persists replace the module 79 Outlet high limit H or L...

Страница 70: ...d out of sequence H or L 1 Check that ame is not present in the combustion chamber Correct any errors 2 Make sure that the ame detector is wired to the correct terminal 3 Make sure the F G wires are p...

Страница 71: ...FD 4 If the fault persists replace the module 128 Fan speed failed during prepurge H or L 1 Check wiring and correct any potential wiring errors 2 Check the VFDs Variable speed Fan Drive ability to ch...

Страница 72: ...equence the module if code reappears replace the ame detector 5 Reset and sequence the module if code reappears replace the module 157 Combustion pressure and ame OFF L 1 Check that ame is not present...

Страница 73: ...ameters reverify and reset module 2 If fault repeats verify electrical grounding 3 If fault repeats replace module 185 Invalid Delta T limit enable setting L 1 Return to Con guration mode and recheck...

Страница 74: ...valid interlock open response setting L 1 Return to Con guration mode and recheck selected parameters reverify and reset module 2 If fault repeats verify electrical grounding 3 If fault repeats replac...

Страница 75: ...grounding 3 If fault repeats replace module 211 Invalid Power up with lockout setting L 1 Return to Con guration mode and recheck selected parameters reverify and reset module 2 If fault repeats veri...

Страница 76: ...ameters reverify and reset module 2 If fault repeats verify electrical grounding 3 If fault repeats replace module 223 Uncon gured Stack limit setpoint setting L 1 Return to Con guration mode and rech...

Страница 77: ...ce module 235 Invalid Outlet connector type setting L 1 Return to Con guration mode and recheck selected parameters reverify and reset module 2 If fault repeats verify electrical grounding 3 If fault...

Страница 78: ...displayed The Burner Control I O button leads to Menu 8 Menu 8 Burner Control I O Screen A green dot indicates a function that is on 2 Press the Digital I O button to see parameters with the functions...

Страница 79: ...ehavior over a period of time for several different parameters fan speed outlet temperature inlet temperature etc Menu 15 Analysis Setup Screen To use this function select the parameter you want to tr...

Страница 80: ...equipped with a low and high re air pressure switch The unit will pre purge at 65 fan for 30 seconds and prove fan through the blocked intake switch Once fan is proven the blower will proceed to 24 an...

Страница 81: ...pport R50D3004 R50D3004 R50D3004 R50D3004 R50D3004 R50D3004 R50D3004 Right Stanchion 12 Front Bezel R50D7121 R50D7121 R50D7121 R50D7121 R50D7121 R50D7121 R50D7121 13 Touchscreen Display E2339800 E2339...

Страница 82: ...lange Kit RP2050100 RP2050100 RP2050100 RP2050100 46 Gas Valve Venturi RS2104900 RS2104900 RS2104900 RS2104900 Cork Gasket 47 Gas Valve O Ring R30 227 R30 227 48 Venturi O Ring RS2105200 RS2105200 RS2...

Страница 83: ...2069109 73 Flame Sensor w gasket R2069200 R2069200 R2069200 R2069200 R2069200 R2071400 R2071400 74 Ignitor w gasket R2069300 R2069300 R2069300 R2069300 R2069300 R2071500 R2071500 74A Ignitor Gasket RW...

Страница 84: ...Page 80 LAARS Heating Systems Parts Illustration 1 Jacket Components...

Страница 85: ...Page 81 NEOTHERM Boilers and Water Heaters Parts Illustration 2 Internal Components Sizes 150 210 Parts Illustration 3 Internal Components Sizes 285 600...

Страница 86: ...Page 82 LAARS Heating Systems Parts Illustration 4 Internal Components Sizes 750 850...

Страница 87: ...Page 83 NEOTHERM Boilers and Water Heaters Parts Illustration 5 Gas Train Components Sizes 150 500 Sizes 150 285...

Страница 88: ...Page 84 LAARS Heating Systems Parts Illustration 6 Gas Train Components Sizes 600 850...

Страница 89: ...Page 85 NEOTHERM Boilers and Water Heaters Parts Illustration 7 Heat Exchanger Components 68A Sizes 285...

Страница 90: ...Page 86 LAARS Heating Systems Parts Illustration 8 Electrical Components Front Battery CR2032 Touchscreen Back...

Страница 91: ...Page 87 NEOTHERM Boilers and Water Heaters Notes...

Страница 92: ...67 603 335 6300 Fax 603 335 3355 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 Dimensions a...

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