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Page 76

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.

To access the diagnostic functions, from the home
screen, touch the control icon, then touch the

‘Diagnostics’ button.

The buttons at the bottom of the screen select
the types of inputs and outputs 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.”

Press the Digital I/O button to see parameters
with the functions that are either “on” or “off.”

See Menu 9.

Menu 9. Digital I/O Screen

The button for Analog I/O displays items that
change continuously between two limits. See
Menu 10

Menu 10. Analog I/O Screen

Press the button for Diagnostic Tests. The
Modulation test allows you to change the

rate at which the burner ﬁ res, and watch the

results. See Menu 11

Menu 11. Modulation Test

Press the Pump Test button. The Pump test
shows detailed information about the three
pumps that may be used by the system.

Menu 12. Pump Test

Содержание NTH

Страница 1: ...in flue gases which could cause serious injury property damage or death Improper installation and or operation will void the warranty Indoor Outdoor AVERTISSEMENT Assurez vous de bien suivres les inst...

Страница 2: ...ments 23 5 2 NeoTherm Water Heater Flow and Head Requirements 23 Section 6A Water Connections NTH Boiler 6A 1 NTH System Piping Hot Supply Connections 24 6A 2 NTH Cold Water Make Up 24 6A 3 Condensate...

Страница 3: ...h Screen 8 1 The Touch Screen 41 8 2 Using the Touch Screen 41 8 3 Verification Process for Safety Related Parameters 43 8 4 While Operating Checking Individual Parameters 44 8 5 Configuring Parameter...

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

Страница 5: ...ceed 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 Installati...

Страница 6: ...th variations of the NeoTherm have the On Off switch on the outside of the unit DOOR HANDLE PULL TO OPEN RELEASE BOTH LATCHES TO OPEN DOOR LATCHES ON OFF SWITCH THE TOUCH SCREEN ON OUTDOOR UNIT IS LOC...

Страница 7: ...ure 3 Connection piping is on the BACK for ALL Outdoor Sizes WATER INLET WATER OUTLET AIR INLET FILTER BOX CONDENSATE TRAP GAS VALVE PRV must be added to this pipe during installation GAS CONNECTION E...

Страница 8: ...WATER OUTLET PRESSURE RELIEF VALVE AIR PRESSURE SWITCH DRAIN VALVE CONDENSATE TRAP AIR TRANSITION ON OFF SWITCH Figure 4 Location of Components Sizes 150 210 EXHAUST VENT CONNECTION GAS CONNECTION AIR...

Страница 9: ...DRAIN VALVE CONDENSATE TRAP GAS VALVE ON OFF SWITCH Figure 6 Location of Components Indoor Size 399 Figure 7 Location of Components Indoor Size 500 EXHAUST VENT CONNECTION PRESSURE RELIEF VALVE TOUCH...

Страница 10: ...RESSURE SWITCH WATER INLET WATER OUTLET AIR INLET CONNECTION DRAIN VALVE CONDENSATE TRAP GAS VALVE MANUAL SHUTOFF GAS VALVE ON OFF SWITCH Figure 9 Location of Components Sizes 750 and 850 WATER INLET...

Страница 11: ...ET WATER INLET WATER OUTLET WATER OUTLET AIR INLET FILTER BOX AIR INLET CONDENSATE DRAIN CONDENSATE DRAIN Outdoor 850 MBH Indoor 850 MBH Figure 10 Connection piping is on TOP for ALL Indoor Sizes Figu...

Страница 12: ...0 4 11 14 37 18 47 19 49 16 42 21 55 18 48 13 33 500 NTH 30 77 5 13 19 50 4 11 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 bot...

Страница 13: ...Page 9 NEOTHERM Boilers and Water Heaters 38 1 2 98 8 3 4 22 7 1 2 19 64...

Страница 14: ...0 18 45 7 27 69 24 1 2 60 285 6 15 5 11 28 5 13 17 1 4 43 8 24 61 19 48 28 1 4 72 12 30 5 399 8 15 5 19 1 2 50 7 3 4 20 17 1 4 43 8 24 61 19 48 28 1 4 72 12 30 5 500 5 13 17 3 4 45 5 13 8 1 4 21 24 61...

Страница 15: ...2 3 4 83 2 3 0 8 5 1 4 13 4 17 1 4 43 8 24 61 19 48 29 1 4 74 12 E F A B C D G in cm in cm in cm in cm in cm in cm 8 45 7 27 69 23 1 2 60 5 1 4 13 20 60 3 7 6 8 45 7 27 69 24 1 2 60 5 1 4 13 27 68 6 3...

Страница 16: ...r damage Any such claims should be filed with the carrier The carrier not the shipper is responsible for shortages and damage to the shipment whether visible or concealed 1 7 Unpacking The NeoTherm un...

Страница 17: ...uld be met when choosing the locations for the appliance 2 2 Locating Appliance for Correct Vent Distance from Outside Wall or Roof Termination The forced draft combustion air blower in the appliance...

Страница 18: ...TAxx 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 xPVCF...

Страница 19: ...ES CANADA ABS ANSI ASTM D1527 PVC sch 40 ANSI ASTM D1785 or D2665 Air pipe material must be chosen CPVC sch 40 ANSI ASTM F441 based upon the intended application of the boiler Single wall galv steel 2...

Страница 20: ...nal not less than 1 4 per foot so that condensate will run back to the NeoTherm and drain out thru the condensate trap Horizontal portions of the venting system must be supported to prevent sagging an...

Страница 21: ...rature of more than 135 C but not more than 245 C Class II venting systems are suitable for gas fired appliances producing flue gas temperatures of 135 C or less Class II venting systems are further c...

Страница 22: ...operating issues Side Wall Combustion Air Terminal The LAARS side wall combustion air terminal or concentric terminal must be used when the heater takes air from a side wall See page 15 Contact Laars...

Страница 23: ...r vent 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...

Страница 24: ...ructure served by the side wall horizontally vented gas fueled equipment It shall be the responsibility of the property owner to secure the services of qualified licensed professionals for installatio...

Страница 25: ...nimale d termin e en utilisant les tableaux appropri s et des lignes directrices dans le National Code de gaz combustible ANSI Z223 1 NFPA 54 et ou CSA B149 1 Codes d installation 3 5 Common Vent Test...

Страница 26: ...y lines and or an obstructed gas supply line Some NeoTherm units are equipped with low and high gas pressure switches that are integrally vent limited These types of devices do not require venting to...

Страница 27: ...LOW H L SIZE GPM FT GPM FT GPM FT GPM FT GPM FT 150 14 3 28 5 11 4 19 9 5 13 6 8 1 11 2 7 1 8 8 199 210 20 24 1 16 16 7 13 4 11 6 11 3 9 9 9 6 9 285 27 25 5 22 17 5 18 14 15 10 5 13 8 399 39 28 31 20...

Страница 28: ...ed above radiation level or as required by the authority having jurisdiction must be provided with a low water cutoff device either as a part of the boiler or at the time of boiler installation NTH PI...

Страница 29: ...boiler is subjected to freezing conditions and the boiler is not able to fire and or the water is not able to circulate there is a risk of freezing in the boiler or in the pipes in the system When wat...

Страница 30: ...Page 26 LAARS Heating Systems Figure 21 Hydronic Piping Single Boiler Zoning with Circulators...

Страница 31: ...Page 27 NEOTHERM Boilers and Water Heaters Figure 22 Hydronic Piping Single Boiler Low Temp Radiant Space Heating Using Low Loss Header and Zone Valves...

Страница 32: ...Page 28 LAARS Heating Systems Figure 23 Hydronic Piping Multiple Boilers Zoning with Circulators...

Страница 33: ...Page 29 NEOTHERM Boilers and Water Heaters Figure 24 Hydronic Piping Multiple Boilers with Indirect DHW Tank Piped from System Loop...

Страница 34: ...Page 30 LAARS Heating Systems Figure 25 Hydronic Piping Multiple Boilers Reverse Return Multi Temp Zones Zoning with Circulators...

Страница 35: ...ilers and Water Heaters Figure 26 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 36: ...Page 32 LAARS Heating Systems Figure 27 Hydronic Piping Multiple Boilers with Indirect DHW Off of One Boiler The boiler pump must shut down during DHW operation...

Страница 37: ...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 38: ...H 5 and may harm some 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 o...

Страница 39: ...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 40: ...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 41: ...d 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 wired in a groun...

Страница 42: ...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 15 NTH Electrical Data Figure 32 Control Panel Layout Figure 34...

Страница 43: ...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 44: ...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 45: ...h the screen to wake it up While 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...

Страница 46: ...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 reading param...

Страница 47: ...ormation 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 accepted 3...

Страница 48: ...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 49: ...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 50: ...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 51: ...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 52: ...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 53: ...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 54: ...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 55: ...Lead Lag Leader 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 56: ...the heating demand increases so that the firing rate of that first boiler rises to your boiler configurations Base Load Value see Figure 42 the next boiler in the sequence will start up and begin fir...

Страница 57: ...Configuration In the Lead Lage Follower Sub Menu Identify each unit including the Lead Lag Leader as a Follower by turning on Follower Enable 8 7 17 Lead Lag Follower Configuration Menu 21 Home Screen...

Страница 58: ...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 59: ...485 Figure 45 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 MB...

Страница 60: ...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 61: ...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 62: ...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 63: ...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 64: ...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 connecte...

Страница 65: ...ain and the burner 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...

Страница 66: ...ong life and dependable operation but the safety of equipment depends on their proper functioning Only a qualified service technician should inspect the basic items listed below every year Burner Chec...

Страница 67: ...l board The control board connections are keyed to only allow connection in the proper location but proper handling techniques should be used to avoid damage to the wiring or connectors To remove the...

Страница 68: ...door blower arm If the fan is determined to be defective replace the existing fan with a new one reversing the steps listed above Be sure to install all of the required O rings and gaskets between the...

Страница 69: ...w c For propane set the low gas pressure switch to 5 w c For natural and propane set the high gas pressure switch to 14 10 3 Battery Backup for Date Time The touchscreen does have an internal battery...

Страница 70: ...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 71: ...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 72: ...module 2 Waiting for safety data veri cation L 1 Device in Con guration mode and safety parameters need veri cation and a device needs reset to complete veri cation 2 Con guration ended without veri...

Страница 73: ...e starts H 24 Internal fault Spark voltage stuck low or high H 25 Internal fault Spark voltage changed too much during ame sensing time H 26 Internal fault Static ame ripple H 27 Internal fault Flame...

Страница 74: ...imit Control Input OFF H 1 Check wiring and correct any faults 2 Check Interlocks connected to the LCI to assure proper function 3 Reset and sequence the module monitor the LCI status 4 If code persis...

Страница 75: ...t persists replace the module 92 Outlet sensor fault H 1 Check wiring and correct any possible errors 2 Replace the Outlet sensor 3 If previous steps are correct and fault persists replace the module...

Страница 76: ...ption Will not be a lockout fault Hold Only Internal hardware test Not a lockout 111 Flame current lower than weak threshold H Hold time of recycle and hold option Will not be a lockout fault Hold Onl...

Страница 77: ...to the correct terminal 3 Make sure the F G wires are protected from stray noise pickup 4 Reset and sequence the module if code reappears replace the ame detector 5 Reset and sequence the module if c...

Страница 78: ...nvalid interlock start check setting L 199 Invalid LCI Limit Control Input enable setting L 200 Invalid lightoff rate setting L 201 Invalid lightoff rate proving setting L 202 Invalid MFEP Main Flame...

Страница 79: ...Outlet high limit setpoint setting L 227 Invalid DHW Domestic Hot Water high limit setpoint setting L 228 Invalid Stack limit setpoint setting L 229 Invalid Modulation output setting L 230 Invalid CH...

Страница 80: ...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 81: ...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 82: ...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 83: ...upport R50D3004 R50D3004 R50D3004 R50D3004 R50D3004 R50D3004 R50D3004 R50D3004 Right Stanchion 12 Front Bezel R50D7121 R50D7121 R50D7121 R50D7121 R50D7121 R50D7121 R50D7121 R50D7121 13 Touchscreen Dis...

Страница 84: ...0100 RP2050100 46 Gas Valve Venturi RS2104900 RS2104900 RS2104900 RS2104900 Cork Gasket 47 Gas Valve O Ring R30 227 R30 227 R30 227 48 Venturi O Ring RS2105200 RS2105200 RS2105200 RS2105200 RS2105200...

Страница 85: ...2069200 R2069200 R2069200 R2071400 R2071400 74 Ignitor w gasket R2069300 R2069300 R2069300 R2069300 R2069300 R2069300 R2071500 R2071500 74A Ignitor Gasket RW2013300 RW2013300 RW2013300 RW2013300 RW201...

Страница 86: ...Page 82 LAARS Heating Systems Parts Illustration 1 Jacket Components...

Страница 87: ...Page 83 NEOTHERM Boilers and Water Heaters Parts Illustration 2 Internal Components Sizes 150 210 Parts Illustration 3 Internal Components Sizes 285 600...

Страница 88: ...Page 84 LAARS Heating Systems Parts Illustration 4 Internal Components Sizes 750 850...

Страница 89: ...Page 85 NEOTHERM Boilers and Water Heaters Parts Illustration 5 Gas Train Components Sizes 150 500 Sizes 150 285...

Страница 90: ...Page 86 LAARS Heating Systems Parts Illustration 6 Gas Train Components Sizes 600 850...

Страница 91: ...Page 87 NEOTHERM Boilers and Water Heaters Parts Illustration 7 Heat Exchanger Components 68A Sizes 285...

Страница 92: ...Page 88 LAARS Heating Systems Parts Illustration 8 Electrical Components Front Battery CR2032 Touchscreen Back...

Страница 93: ...Page 89 NEOTHERM Boilers and Water Heaters Notes...

Страница 94: ...Page 90 LAARS Heating Systems Notes...

Страница 95: ...Page 91 NEOTHERM Boilers and Water Heaters Notes...

Страница 96: ...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 1604 Document 1330B Dimensions and specification...

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