Bradford White LAARS OmniTherm OCH1250 Installation And Operation Instructions Manual Download Page 113

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Page 113

The

MNI

HERM

11.E Combustion setup

The OmniTherm uses a sophisticated gas control system that monitors the gas air ratio and automatically

adjusts to maintain proper operating conditions. On initial installation and subsequent inspections, the CO

2 levels

should be checked and if outside the allowable range, adjustments made. To make adjustments to the gas air

ratio use the Gas valve display inside the boiler jacket and follow the process below.

1. Boiler display>Configure>Firing rate. Force the fan speed to the desired RPM by navigating through the boiler

display and setting the Fan RPM. Enable fan speed and set the fan speed to desired RPM. Use the following
RPMs to set combustion, 1000, 1500, 2000, 3000, 4000, and maximum fan speed.

11.E.1 Firing Rate for Boiler

Firing Rate. See Section 8.D.6

Summary of Contents for LAARS OmniTherm OCH1250

Page 1: ...res les instructions donn es dans cette notice pour r duire au minimum le risque d incendie ou d explosion ou pour viter tout dommage mat riel toute blessure ou la mort Ne pas entreposer ni utiliser d...

Page 2: ...w Headloss Data 25 4 C Water Heater Flow and Headloss Data 25 4 D Recovery Data 26 SECTION 5 Piping 5 A Boiler Water Piping 27 5 A 1 Boiler Water Connections 27 5 A 2 Cold Water Make Up 27 5 A 3 Freez...

Page 3: ...OEM only 92 8 E 11 About the Firmware of the touchscreen 92 8 E 12 Dev Fan 92 8 E 13 Fan Settings 92 8 F Messages and USB 93 8 F 1 Messages 93 8 F 2 USB Functionality 93 8 G Active Demands 94 SECTION...

Page 4: ...LAARS Heating Systems OMNITHERM OMT 60 FRONT VIEW 1750 2000 2500 3000 1250 1500...

Page 5: ...m bell high limits D OCV 75psi PRV U OCV w H Stamp 150psi PRV D Auto manual K Gateway LONworks E OCH 125psi PRV 2 Flange kit OCV H Stamp 30psi PRV high limits alarm bell F 150psi PRV 3 Flange kit OCV...

Page 6: ...mestic hot water use adjust the outlet control limit or use temperature limiting valves to obtain a maximum water temperature of 125 F 52 C WARNING The inlet gas pressure to the unit must not exceed 1...

Page 7: ...tempt any service or repair work involving RCF without wearing the following protective gear 1 A National Institute for Occupational Safety and Health NIOSH approved respirator 2 Long sleeved loose tt...

Page 8: ...nit 1 E Unit Dimensions and Components 1 E 1 Model 1250 1500 21 10 3 66 58 48 4 17 5 5 6 2 11 5 17 7 Electrical Connections Cond Trap 6 Air Inlet PRV 6 Vent 2 NPT Gas Conn 39 26 7 24 24 5 62 2 1 2 Out...

Page 9: ...Valve Touchscreen Control Panel Power Pack Air Filter Box Manual gas valve Water Outlet Water Inlet Vent Condensate Trap Heat Exchanger Blower Gas Valve System Controls Touchscreen Power Connections P...

Page 10: ...tlet 8 Vent 2 NPT Gas Inlet 8 NPT Air Inlet PRV Electrical Connection Gas Valve Reset Sight Glass Note The gas train layout is the same for Models 1750 up to 3000 with only the size of the components...

Page 11: ...d Top Panel Manual gas valve Manual Gas Valve Power Pack Control Panel Air Filter Box Gas Inlet Blower Gas Valve Water Outlet Water Inlet Vent Condensate Trap PRV Heat Exchanger System Controls Touchs...

Page 12: ...5 10 10 5 7 20 1 54 3 65 6 2 NPT GAS COND TRAP PRV ELECTRICAL CONNECTIONS 8 VENT OMT 2000 2500 2000 2500 3000 Gas Valve Reset Sight Glass Note The gas train layout is the same for Models 1750 up to 3...

Page 13: ...Power Pack Air Filter Box Power Connections Manual gas valve System Controls Touchscreen Blower Water Outlet Water Inlet Vent Condensate Trap PRV Gas Valve Power Connections Conduit Gas Inlet Note The...

Page 14: ...wall and there is potential for snow accumulation in the local area both terminals should be installed at an appropriate level above grade or the maximum expected snow line The dimensions and require...

Page 15: ...niques If these are not available refer to the Manufacturer recommendations for the material used Route the vent pipe to the heater as directly as possible Seal all joints and provide adequate hangers...

Page 16: ...al venting system See tables 4 and 5 for a list of allowable exhaust vent and combustion air pipe materials Refer to venting supplier s instructions for complete parts list and method of installation...

Page 17: ...ment in the enclosure When communicating with the outdoors through horizontal ducts each opening shall have a minimum free area of not less than 1 square inch per 2000 Btu hr 11 square cm kW of total...

Page 18: ...mon Venting 2 B 1 Common Venting This unit can be common vented however the common venting must be a professionally designed and approved system When common venting a fan assisted unit with other appl...

Page 19: ...orde l ouverture de d charge Utiliser la flamme d une allumette ou d une chandelle ou la fum e d une cigarette d un cigare ou d une pipe 6 Une fois qu il a t d termin selon la m thode indiqu e ci dess...

Page 20: ...r inlet Other than Direct vent 4 ft 1 2m below 36 inches 91 cm to any other unit or to side of opening 1 ft 30 cm above opening K Clearance to a mechanical air supply inlet 3 feet 91 cm above if withi...

Page 21: ...oint at which it penetrates the roof It must extend at least 2 feet 0 6 m higher than any portion of a building within a horizon tal distance of 10 feet 3 0 m and high enough above the roof line to pr...

Page 22: ...nstalled 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 In the event that the requirements of the subdiv...

Page 23: ...hould be supported by suitable hangers or floor stands not the unit Review the following instructions before proceeding with the installation 1 Verify that the unit is fitted for the proper type of ga...

Page 24: ...0 10 800 19 10 20 2 760 4 400 7 780 15 900 28 700 20 2 420 4 660 7 430 13 10 30 2 220 3 530 6 250 12 700 23 000 30 1 940 3 750 5 970 10 60 40 1 900 3 020 5 350 10 900 19 700 40 1 660 3 210 5 110 9 03...

Page 25: ...00 259 65 2 207 40 7 173 28 1 148 20 4 129 15 6 Model 11 C 14 C 17 C 19 C 22 C Flow l m Headloss m Flow l m Headloss m Flow l m Headloss m Flow l m Headloss m Flow l m Headloss m 1250 416 7 6 333 5 0...

Page 26: ...2030 1827 2000 2568 4214 3512 3010 2634 2341 2107 2500 6578 5262 4385 3759 3289 2923 2631 3000 7767 6214 5178 4438 3884 3452 3107 Model Temperature Rise 22 C 28 C 33 C 39 C 44 C 50 C 56 C L h L h L h...

Page 27: ...cal Company Dow Chemical Company The boiler control offers some assistance with freeze protection as long as the boiler is energized and able to fire 5 A 1 Boiler Water Connections NOTE This unit must...

Page 28: ...d to be used as a working installation drawing Local code requirements must be met 5 A 4 Suggested Boiler Piping Schematics Figure 4 on page 28 through Figure 6 on page 30 show suggested piping config...

Page 29: ...d controls Expansion tank 4 pipe dia max 4 pipe dia max 4 pipe dia max Note This drawing is a schematic representation of a piping style and is not intended to be used as a working installation drawin...

Page 30: ...ating zone circuits Space heating zone circuit Air vent Water feed controls Expansion tank Common piping must be sized for the combined water flow of all the boilers High temp space heating zone circu...

Page 31: ...rations for water heaters These diagrams are only meant as guides All components or piping required by local code must be installed Figure 7 DHW Piping One Heater One Vertical Tank NOTES 1 Locate DHW...

Page 32: ...er hardness at job site 5 If the tank does not have a tapping for the cold water supply the supply may be run to the pipe between the tank and boiler inlet Figure 9 DHW Piping Two Heaters Two Vertical...

Page 33: ...nufacturer s responsibility CAUTION Label all wires prior to disconnection when servicing controls Wiringerrorscancauseimproperanddangerous operation Verifyproperoperationafteroperationservicing ATTEN...

Page 34: ...ls the incoming voltage must be protected by an appropriately sized circuit breaker installed by qualified authorized personnel The 120 volt and 24 volt systems will be protected with resettable fuses...

Page 35: ...CH1 DHW1 CH2 DHW2 CH2 DHW2 DHW DHW3 DHW DHW3 SPARE 1 SPARE 1 SPARE 2 SPARE 2 BAS 0 10VDC BAS 0 10VDC PUMP 0 10VDC PUMP 0 10VDC RUN C RUN N C RUN N O ALARM C ALARM N C ALARM N O CASCADE B CASCADE A CA...

Page 36: ...s a dry contact the system pump supply voltage or system pump relay coil voltage would be applied at terminal 21 and when the system pump is activated power will be available at terminal 22 Contact ra...

Page 37: ...normally open set of contacts whenever the unit is running Contact ratings are 250VAC 0 6A maximum Alarm when used is connected to terminals 54 common 55 normally closed and 56 normally open The cont...

Page 38: ...HW PUMP SYSTEM PUMP SYSTEM PUMP SPARE 1 SPARE 1 SPARE 2 SPARE 2 24 DRY CONTACTS ALARM BELL ALARM BELL SYSTEM SUPPLY SYSTEM SUPPLY SYSTEM RETURN SYSTEM RETURN DHW DHW OUTDOOR OUTDOOR CH1 DHW1 CH1 DHW1...

Page 39: ...ROR 0 LOW WATER CUT OFF ERROR 1 MANUAL RESET HIGH LIMIT ERROR 2 BLOCKED FLUE ERROR 3 HIGH GAS PRESSURE ERROR 4 LOW GAS PRESSURE ERROR 5 AUTO RESET HIGH LIMIT ERROR 6 SPARE SAFETY CHAIN ERROR 7 OUTLET...

Page 40: ...None 1 Outlet 2 DHW 3 System 4 Inlet 5 Flue 6 System Return 65 Read Active Service AI 65 Read 66 Read Lag 1 State AI 66 Read 0 Not Present 1 Not Available 2 Available 3 Running 4 Locked Out 67 Read L...

Page 41: ...V 7 Read Write 136 Read Write CH2 I AV 8 Read Write 137 Read Write CH2 D AV 9 Read Write 140 Read Write CH1 PID High P AV 12 Read Write 141 Read Write CH1 PID High I AV 13 Read Write 142 Read Write CH...

Page 42: ...ND SHALL NOT BE 1 8 DECIMALS XX 3 2 RS HEATING SYSTEMS DWG NO E23819 SH 1 REV SH 3 8 19 DG 3 8 19 REVISIONS REV CHANGE APPR ENGR APPR ECN 010 SE EXCEPT AS SPECIFICALLY AUTHORIZED IN WRITING B 17 152N...

Page 43: ...A A PURPOSE EXCEPT AS SPECIFICALLY AUTHORIZED IN WRITING 17 152N 03 RR 3 7 19 APPROVALS DRAFT ENGR CHECK REPRODUCED TRANSFERRED TO OTHER DOCUMENTS USED OR DISCLOSED TO OTHERS FOR MANUFACTURING OR ANY...

Page 44: ...1 DECIMALS XX E23824 A PROJECT D C B 1 FINISH NA 4 480 575 600V 3 OMT 2 5 Y LAARS HEATING SYSTEMS REV DWG NO CHECK ECN SH A SH 3 7 19 DG 3 7 19 REVISIONS REV CHANGE DRAFT 2 3 E23824 1 ADDED ENCLOSURE...

Page 45: ...SHALL NOT BE CHANGE FINISH 1 8 ADDED ENCLOSURE FAN AND ONE NEW TERMINAL DWG NO 3 2 ARS HEATING SYSTEMS DIMENSIONS ARE IN INCHES A56A E23825 1 REV B SH 3 7 19 DG 3 7 19 REVISIONS REV SH THIRD ANGLE PR...

Page 46: ...STEMS DRAFT E23826 1 SH 3 7 19 DG 3 7 19 REVISIONS REV CHANGE APPR ENGR APPR ECN A A CHECK 17 152N 03 RR 3 7 19 INTENDED SIZE SOFTWARE DWG NO APPROVALS DRAFT ENGR 010 NSFERRED TO OTHER DOCUMENTS USED...

Page 47: ...ELAY INTERLOCK GENERATOR X15 4 SPARK IGNITOR CONDENSATE HIGH GAS PRESSURE GND X1 2 X1 14 X1 1 X1 15 X1 3 X1 1 INSTALLED FACTORY X1 13 X1 1 TB1 20 TB1 19 TB1 18 TB1 22 TB1 21 TB1 17 TB1 27 TB1 26 TB1 2...

Page 48: ...X1 1 X1 14 X1 2 Du HIGH GAS PRESSURE CONDENSATE IGNITOR SPARK X15 4 GENERATOR RELAY INTERLOCK GAS VALVE OPTIONAL X4 4 X4 7 X12 3 SPARK ARHL X14 8 TB1 21 TB1 19 X4 1 X14 3 FLOW X14 4 TB1 18 X4 17 X12 4...

Page 49: ...SOR INPUTS OUTPUTS Boiler N Pump L TB1 18 TB1 21 TB1 22 TB1 19 TB1 20 Pump System Pump DHW TB1 17 POWER OUTPUTS HIGH GAS PRESSURE CONDENSATE IGNITOR SPARK X15 4 GENERATOR RELAY INTERLOCK GAS VALVE OPT...

Page 50: ...21 TB1 22 TB1 19 TB1 20 Pump System Pump DHW TB1 17 POWER OUTPUTS HIGH GAS PRESSURE CONDENSATE IGNITOR SPARK X15 4 GENERATOR RELAY INTERLOCK GAS VALVE OPTIONAL X4 4 X4 7 X12 3 SPARK ARHL X14 8 TB1 21...

Page 51: ...1 1 X1 13 2 1 Inlet FACTORY INSTALLED Dual Element 10k 20k 10k 20k X1 1 X1 3 X1 15 X1 1 X1 14 X1 2 Dual Element 4 3 2 1 Flue 1 2 3 4 HIGH GAS PRESSURE CONDENSATE IGNITOR SPARK X15 4 GENERATOR RELAY IN...

Page 52: ...HW TB1 36 TB1 35 TB1 37 TT 1 TT 1 24VDC HEAT DEMANDS OPTIONAL ARHL OPTIONAL OPTIONAL LWCO X4 19 RELAY INTERLOCK GAS VALVE 480VAC 3PH 60Hz CB X1 15 X1 13 X1 3 X1 2 X1 14 X1 1 X1 1 Inlet Sensor Flue Sen...

Page 53: ...Page 53 The OMNITHERM This page intentionally left blank...

Page 54: ...R BL O BL O OUTDOOR RETURN SUPPLY SYSTEM SYSTEM DHW 29 30 27 28 32 31 33 DHW SYSTEM PUMP PUMP 21 22 20 19 BL W W BL R G BR BR Y BR G BR V O V MAIN POWER SWITCH 3 BK O 1 2 BK 4 BL Y W BK O G 120N GND...

Page 55: ...E B 100K t t t t FLUE A 100K RS485 BMS RS485 60 58 57 56 59 B A A W G V W BK 1 5 3 6 W V 7 4 8 Y R BR G W G Y G W G 8 PIN CONNECTOR C N C N O N C N O CONTACTS RUN RELAY ALARM RELAY CONTACTS 54 53 52 5...

Page 56: ...the Message icon will take you to the message itself The USB functionality will show the USB Icon at this location if being used See Section 8 F on page 93 Active Demands Will show icons that indicat...

Page 57: ...creens may only allow you to set one or the other while some other screens example pump selection will allow you to select any or all of the options These windows will reflect the allowable ranges of...

Page 58: ...changes made during the initial setup and commissioning Be aware that in this level of password protection changes to the configuration setup may result in lock outs or conflicts with your system setu...

Page 59: ...utdown Anti short Cycle and Time Date 8 C 1 CH Central Heat CH stands for central heat It is used for space heating demands On the Quick Start Screen touch the CH thermometer icon to navigate to the C...

Page 60: ...ntral Heat Two 2 To navigate to the CH2 Quick Start Screen touch the CH2 Icon on the CH Quick Start Selection Screen The CH2 screen will have the same look and functionality as the CH1 Screen 8 C 2 DH...

Page 61: ...ture CH2 Minimum Water Temperature The minimum boiler CH2 outlet temperature based on the Maximum Outdoor Temperature 8 C 4 Warm Weather Shut Down Warm weather shut down allows the user to disable the...

Page 62: ...e after a heat demand is satisfied that the unit will wait to satisfy the next active heat demand NOTE Anti Short Cycle Time does not apply to DHW DHW3 heat demands 8 C 6 Time Date To navigate to the...

Page 63: ...he controller allows access to all parameters available based on the access level that is unlocked To navigate to the Configuration Screen touch the Configure Icon in the lower left portion of the Hom...

Page 64: ...e default setting is Enabled Set Point This is the temperature set point for CH1 On Hysteresis The temperature at which the hysteresis will turn on Off Hysteresis The temperature at which the hysteres...

Page 65: ...the same manner as CH1 Proportional Gain This value is the corrective action that is proportional to the error set point control temperature Integral Time This value is applied to the sum of the error...

Page 66: ...ditional parameter for adjustment DHW Offset Upon a DHW DHW3 heat demand the unit will control the outlet temperature to the DHW Set Point plus the DHW Offset set point DHW Offset For example with a D...

Page 67: ...the adjustment of the following parameters Enable Disable Enables and disables the outdoor reset functionality Maximum Outdoor Temperature The outdoor temperature at which the unit will use the minim...

Page 68: ...rst based on the cascade rotation logic As the firing rate of this unit reaches the Base Load Value once the Min On Time timer expires the next unit in the sequence will fire and both units will modul...

Page 69: ...s are allowed to increase firing rate same at both boilers up to maximum firing rate Boilers Boilers Boilers Boilers Boilers Increased demand Once the first boiler reaches the Base Load Value 65 firin...

Page 70: ...ad value can be exceeded as long as all units maintain the same firing rate As the firing rate decreases below the Drop Load Value the last unit to ignite turns off first last on first off following t...

Page 71: ...ignition both units modulate to half of the cascade firing rate then gradually increase the firing rate together up to the Base Load Value Decreasing demand As the demand decreases once the requested...

Page 72: ...firing rate reaches the Drop Load Value the seventh boiler turns off This pattern continues as demand continues to decrease until there is a single boiler firing Lead Lag 4 up to 8 boilers Decreasing...

Page 73: ...to the Lead boiler settings Lost Lead Backup Setpoint When configured for Cascade Redundancy Boiler Internal Set Point this parameter is the maximum outlet temperature the local boiler is allowed to s...

Page 74: ...tion To navigate to the Cascade Rotation Screen touch the Cascade Icon on the Configure Screen then touch the Rotation Icon on the Cascade Configuration Screen The Cascade Rotation Screen is a view on...

Page 75: ...s of communication with the lead unit the lag units will continue to operate in the same manner as when the communication stopped For example if a lag unit was firing to satisfy a cascade heat demand...

Page 76: ...uto the pump will turn on automatically upon a call for heat Always On the pump will run continuously Disable the pump will not turn on upon a DHW heat demand DHW Pump Post Circulation This parameter...

Page 77: ...me Derivative Time This value is applied to the rate of change of the error Minimum Speed This is the minimum speed to which the Vari Prime will control the pump Changes to min max speed require cycli...

Page 78: ...our system will fire Flue Limitation Sets the flue temp limitations Outlet Limitation Parameters Allows for the adjustment of Min and Max Outlet Temps 8 D 6 Manual Firing Rate To navigate to the Manua...

Page 79: ...ts Parameters Screen The Flue Limitation Parameters Screen allows adjustment of the following parameters Manual Reset Flue The temperature at which the unit will shut down due to exceeding a flue temp...

Page 80: ...the boiler heater will run The unit of this parameter is so if the value of this parameter is 10000 or 100 00 this equates to 10 0VDC or 20mA Demand Min This is the minimum value that corresponds to t...

Page 81: ...inimum 2 5VDC Demand Maximum 10 0VDC the unit will linearize the set point as shown in Figure 35 CONFIGURATION Figure 36 External Firing Rate Example 8 D 8 b External Firing Rate With External Firing...

Page 82: ...neous Features Icon on the Configuration Screen The Miscellaneous Features screen provides navigation for the following items Demands Priorities To set priorities for all configured CHW or DHW heating...

Page 83: ...guration Screen touch the Miscellaneous Features Icon on the Configuration Screen then touch the Anti Short Cycle Icon on the Miscellaneous Features screen The Anti Short Cycle Configuration Screen al...

Page 84: ...time Summer Kick Period The duration of time between heat demands that the boiler will wait before exercising the boiler DHW and system pumps There are three options for Warm Weather Shutdown WWSD WW...

Page 85: ...ss of the unit on the Modbus network Timeout Upon loss of communication this is the duration of time in which the unit will wait prior to timeout conditions occurring With BACnet protocol selected the...

Page 86: ...mode when the unit s inlet sensor reads the set point minus the hysteresis value It will leave anti frost mode at the set point plus the hysteresis value Hysteresis This parameter is a offset of the...

Page 87: ...Login Screen touch the Lock Icon on any screen The Login Screen allows the operator to make parameter adjustments based on the level of the login credentials See Section 8 B on page 58 Table 19 on pag...

Page 88: ...8 E Service Screens To navigate to the Service Screen touch the Service Icon in the lower left portion of the Home Screen SERVICE 8 E 1 Burner Enable Disable Available only to the factory or technici...

Page 89: ...t indicator light is green The indicator light associated with the input is red when the input is not satisfied For example if the blower is off the air proving switch is not satisfied and the air pro...

Page 90: ...ce Screen There are two screens associated with the Analog I O Analog I O Inputs Analog I O Outputs Analog I O Input There are three types of analog inputs temperature sensors flame signal and voltage...

Page 91: ...r user interaction has ceased AutoLock Timeout allows the user to adjust the amount of time the touch screen will remain unlocked with no user interaction 8 E 5 History Navigate to the History Screen...

Page 92: ...alibration procedure as shown on the touch screen 8 E 7 Factory Reset Touching the Factory Reset Button on the Service Screen resets all touch screen adjustable parameters back to the factory default...

Page 93: ...meters and settings into a thumb drive for documentation purposes or copies these settings from unit to unit Upload Data from the boiler This is used to retrieve runtime data and history It captures a...

Page 94: ...ndicates the status of active heat demands A black heat demand icon indicates the heat demand that is currently being satisfied A greyed out heat demand icon is either lower in priority than the heat...

Page 95: ...Valve Touchscreen Menus and Descriptions 9 A About the Gas Valve This unit utiizes a Honeywell Gas Valve with a touchscreen display Gas Valve Reset Sight Glass Gas Valve Reset Models 1250 and 1500 Si...

Page 96: ...he system memory from a USB device File types that can be saved or loaded include A F curve valve configuration data and log files Search for Valves If for some reason Valve 1 doesn t appear on the di...

Page 97: ...uence Not available Hi Gas Lo Gas Pressure Not available Fuel Air Ratio Ignition The sub menus found in Fuel Air Ratio Ignition allow for combustion setup ignition characteristics modification loading...

Page 98: ...n speed of the Modbus network Security This menu allows the installer and OEM passwords to be reset if needed If the passwords are changed the installer building owner is responsible for remembering t...

Page 99: ...ed Pos 2 values can be used for troubleshooting From Setup Tests select Fuel Air Ratio Ignition MENU TABS Click back to Setup Tests 9 D Fuel Air Ratio Ignition Menus Fuel Air Ratio Ignition has severa...

Page 100: ...condition the valve will lockout When first installing the boiler and getting the boiler setup the record ign air level button should be selected so that the proper air level can be recorded for the a...

Page 101: ...zer 3 Start point commissioning 4 Adjust CO2 levels Touch the lean arrows to decrease CO2 Touch Rich arrows to increase CO2 Double arrows move the CO2 richer or leaner faster than single arrows In mos...

Page 102: ...9 D 6 Load Save Menu Allows for valve configurations A F curves and log files to be saved or loaded from system memory Saving the original A F curves to memory before starting to make adjustments wil...

Page 103: ...h to create a trend The time scale and variables to monitor can be selected from pulldown menus Reports creates a report of all of the gas valve settings A F curves faults ignition settings and OEM se...

Page 104: ...of the screen Press the Verify Safety Parameters button to proceed to the verification process 2 Select begin to start the verification process 3 Select yes if the parameter change is correct Select...

Page 105: ...Page 105 The OMNITHERM...

Page 106: ...protected parameter The login screen can also be accessed by pressing the login icon at the top of the gas valve display When entering a password select the installer tab and then enter the password L...

Page 107: ...m Water CH2 Temperature x x Address x x Dynamic Address x x Base Load x x Drop Load x x Minimum On Time x x Minimum Off Time x x Lost Lead Backup Setpoint x x Lag On Hysteresis x x Lag Off Hysteresis...

Page 108: ...x x 0 secs 600 secs 60 secs Disable Auto Always On Auto 0 secs 600 secs 60 secs 0 secs 600 secs 60 secs Disable Auto Always On Off During DHW Auto 2000 mV 10000 mV 10000 mV 0 secs 600 secs 60 secs 0...

Page 109: ...c Address x x Base Load x x Drop Load x x Minimum On Time x x Minimum Off Time x x Lost Lead Backup Setpoint x x Lag On Hysteresis x x Lag Off Hysteresis x x Maximum Lag Temperature x x Rotation Mode...

Page 110: ...ut x x x AutoLock Timeout x x x 5 5 Demand Priorities Disable Auto Always On Auto 0 secs 600 secs 60 secs Disable Auto Always On Off During DHW Auto Off When Temperature Reached Auto 0 secs 600 secs 6...

Page 111: ...nit if any part has been under water Immediately call a qualified service technician to inspect the unit and to replace any part of the control system and any gas control that may have been under wate...

Page 112: ...will not occur because the gas is turned off The ignition control will lockout c Open the gas shutoff valve Reset the boiler control by pressing the Reset button on the control Restart the unit The ig...

Page 113: ...allowable range adjustments made To make adjustments to the gas air ratio use the Gas valve display inside the boiler jacket and follow the process below 1 Boiler display Configure Firing rate Force...

Page 114: ...2 richer or leaner faster than single arrows In most cases touching the double arrows is acceptable when adjusting the CO2 e When the CO2 level is set correctly press set min if setting the min modula...

Page 115: ...ires before disconnecting them Wiring errors can cause improper and dangerous operation Verify proper operation after servicing WARNING Disconnect all power to the unit before attempting any service p...

Page 116: ...he front door of the boiler to gain access to the top portion of the unit Remove the high tension ignition wire from the spark electrode Remove the flame sensor wire Remove the two 2 nuts and spacers...

Page 117: ...lue collector and into the longer condensate trap line which is being diverted into a separate container WARNING Failure to rinse the debris from the heat exchanger and temporary drain line may lead t...

Page 118: ...heck the manual reset high limit set point Auto Reset High Limit Outlet water temperature has exceeded the auto reset high limit setting Auto reset Condition Annunciation Warning High limit auto error...

Page 119: ...e the resistance of each element of the sensor and compare to the resistance table below Replace if necessary Temp F 10K 20K Resistance Resistance 68 12555 25099 86 8025 16057 104 5279 10569 122 3563...

Page 120: ...uity Replace if necessary Burner Max Trials The maximum attempts for ignition has occurred without sensing flame Manual reset Condition Annunciation on Navigation Bar Verify supply and manifold gas pr...

Page 121: ...90 122 50 35270 140 60 24160 158 70 16870 176 80 12000 194 90 8674 212 100 6369 248 120 3581 284 140 2117 320 160 1307 356 180 839 392 200 558 428 220 382 464 240 269 500 260 194 536 280 143 Flow Swit...

Page 122: ...3 BACK VIEW 4 FARMOD FILTER 6 3 5 Item No Description 1 Spark Generator 2 Valve Display 3 FARMod Tubes 4 Condensate Switch 5 FARMod Filter 6 FARMod 1250 1500 R2084600 R2084800 R2084700 40N2008 R208260...

Page 123: ...EL ACCESS FLUE 150S302601 3 FILTER ASSY AIR INTAKE 150S2610 4 PANEL JACKET RIGHT 150S3006 5 PANEL JACKET LEFT 150S3007 6 PANEL JACKET TOP 150S3008 7 ACCESS PANEL 150S3013 8 DOOR ASSY LOWER 150S3024 9...

Page 124: ...WER 175S3002 5 PANEL JACKET LEFT LOWER 175S3018 6 PANEL JACKET RIGHT UPPER 175S3004 7 PANEL JACKET LEFT UPPER 175S3016 8 PANEL JACKET TOP 300S3005 9 ACCESS PANEL 300S3013 10 PANEL JACKET REAR 175S3001...

Page 125: ...500 5 PANEL JACKET LEFT LOWER 300S3018 6 PANEL SIDE UPPER LEFT 250S3021 7 PANEL JACKET RIGHT LOWER 300S3002 8 PANEL SIDE UPPER RIGHT 250S3004 9 PANEL JACKET TOP 300S3005 10 PANEL JACKET REAR 250S30010...

Page 126: ...S2500 5 PANEL JACKET LEFT LOWER 300S3018 6 PANEL SIDE UPPER LEFT 300S3016 7 PANEL JACKET RIGHT LOWER 300S3002 8 PANEL SIDE UPPER RIGHT 300S3004 9 PANEL JACKET TOP 300S3005 10 PANEL JACKET REAR 300S300...

Page 127: ...PARTS LIST ITEM NO DESCRIPTION PART NO 1 SWITCH CUTOFF LOW WATER E2387600 2 BOARD CONTROL R2082700 3 TRANSFORMER ASSY 120 24V 75 VA 150S7019 4 FAN COMPACT AC AXIAL E2392600 5 RELAY REPLACEMENT 110V S...

Page 128: ...4 TEMPERATURE SENSOR 1 1 E2387700 5 VICTAULIC COUPLING 2 2 P2101300 6 RFC TILE ASSY TOP 1 1 R2085600 7 RFC TILE ASSY BOTTOM 1 1 R2085700 8 BAFFLE 24 24 150S2609 9 CLAMP ASSEMBLY 6 6 150S2164 10 GASKE...

Page 129: ...00 5 VICTAULIC COUPLING 2 P2109800 6 PRV 30 PSI 1 A2124000 PRV 50 PSI 1 A2124005 PRV 60 PSI 1 A2124004 PRV 75 PSI 1 A2124009 PRV 125 PSI 1 A2124013 PRV 150 PSI 1 A2124014 7 RFC TILE ASSY TOP 1 R208580...

Page 130: ...IN MASSACHUSETS 3 Gas Train Assembly Models 1250 and 1500 Parts List QTY PART NO DESCRIPTION ITEM NO 1 R2004000 SWITCH HIGH GAS PRESSURE 1 1 V2028100 GAS VALVE 2 2 R2085100 O RING 3 1 R2004100 SWITCH...

Page 131: ...CHUSETS 3 Gas Train Assembly Models 1750 2000 2500 and 3000 CSD 1 Version PARTS LIST 1750 2500 3000 PART NO DESCRIPTION ITEM NO 1 R2004000 SWITCH HIGH GAS PRESSURE 1 1 V2026300 GAS VALVE 2 1 V2028600...

Page 132: ...2 SHCS ZINC F2057200 7 GASKET BURNER S2131100 8 O RING 3 16 5 7 8 ID EPDM 150S5010 9 BLOWER 120V MODELS A2124400 BLOWER 208 220 240V MODELS A2134400 10 O RING BLOWER OMT 300S5039 11A MIXER ASSEMBLY FR...

Page 133: ...HCS ZINC 6 GASKET BLOWER OUTLET FLANGE BLOWER 120V MODELS A2134500 A2134500 N A BLOWER 208 600V MODELS 8 O RING BLOWER 9A MIXER ASSY FRONT 9B MIXER ASSY REAR 10 FITTING ADAPTER 8mm TUBE TO 1 8 NPT 11...

Page 134: ...TH FLAME SENSOR R2083100 5 GASKET BLOWER OUTLET FLANGE 400S6904 BLOWER 208V MODEL A2133900 BLOWER 480 600V MODELS A2133901 7 O RING BLOWER 300S5039 8A MIXER ASSY FRONT R2084302 8B MIXER ASSY REAR R208...

Page 135: ...SFORMER 208 X 416 PRIM 120 X 240 SEC 500 VA 50 60HZ E2385300 1 TRANSFORMER 240 X 480 PRIM 120 X 240 SEC 500 VA 50 60HZ E2384000 1 4 CIRCUIT BREAKER 2 POLE 3 0A DIN RAIL MNT E2355100 1 1 5 POWER RELAY...

Page 136: ...50 60HZ 1 E2384000 2 CIRCUIT BREAKER 7 AMP PANEL MOUNT 1 1 E2378600 3 FAN AXIAL 4 11 16 SQUARE 1 1 12 DEEP 115VAC 1 1 E2376300 4 DIN RAIL ASSY 208 220 240V 1 1 1 300S731702 5 CIRCUIT BREAKER 2 POLE 3...

Page 137: ...12 APM PANEL MOUNT 1 1 E2383400 5 CIRCUIT BREAKER 7 AMP PANEL MOUNT 1 1 1 E2378600 6 DIN RAIL ASSY 208V 3 1 300S731703 DIN RAIL ASSY 480V 3 1 300S731704 DIN RAIL ASSY 575 600V 3 1 300S731705 7 POWER R...

Page 138: ...1 E2376300 6 CORD SET AXIAL FAN 90 DEG HEAD 24 LEAD not shown 1 1 1 E2376500 7 WIRE HARNESS ASSY 208V 3 OMT 3 0 not shown 1 300S7401 WIRE HARNESS ASSY 480V 3 OMT 3 0 not shown 1 300S7402 WIRE HARNESS...

Page 139: ...A2124010 VALVE PRV APOLLO 10 616 05 30 PSI 1 1 4 X 1 1 2 NPT 2 716 KBTU HR 1 1 A2124000 10 1 2 7 4 6 3 8 9 5 11 Water Outlet Assembly Models 1250 and 1500 PARTS LIST ITEM NO DESCRIPTION HYDRONIC QTY V...

Page 140: ...0700 6 PLUG PIPE 1 2 NPT HEX HEAD SST 316 ASME 1 P2084800 PLUG 1 2 STEEL 1 P2016000 7 PLUG 2 NPT 316 SS CLASS 150 1 P2103300 PLUG PIPE 2 NPT STEEL 1 P2109300 8 PLUG 1 4 NPT 316 SS CLASS 150 1 P2104000...

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Bradford White LAARS OmniTherm OCH1250, Installation And Operation Instructions Manual

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