Aerco Benchmark G-00-711 User Manual Download Page 4

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FOREWORD

Foreword

The AERCO Benchmark boiler is a true industry advance that meets the needs of today's

energy and environmental concerns. Designed for application in any closed loop hydronic

system, the Benchmark's modulating capability relates energy input directly to fluctuating

system loads. The Benchmark's 15:1 turn down ratio and condensing capability offers extremely

high efficiencies and makes the Benchmark ideally suited for modern low temperature, as well

as, conventional heating systems.

Whether used in singular or modular arrangements the Benchmark offers the maximum

flexibility in venting with minimum installation space requirements. The Benchmark's advanced

electronics are available in several selectable modes of operation offering the most efficient

operating methods and energy management integration.

For service or parts, contact your local sales representative or AERCO INTERNATIONAL.

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Summary of Contents for Benchmark G-00-711

Page 1: ...OMM 0009_0A Benchmark 2 0 Gas Fired Boiler USER MANUAL Used for Serial Numbers G 00 711 thru G 01 095 Benchmark Series Gas Fired Boiler System Condensing Modulating Forced Draft Natural Gas Fired Hot Water Boiler 2 000 000 BTU H Input ...

Page 2: ...3 2 The Temperature Controller 3 3 The Primary Menu 3 4 The Secondary Menu 3 5 The Status Annunciator 3 6 The Combustion Safeguard 3 7 Water Level Test and Reset 3 8 On Off Switch 3 9 Starting sequence 3 10 After Flame 3 11 Flame Test Jacks 3 12 Start Stop Levels 3 13 Auto Restarts Switches Section 4 INITIAL START UP 4 1 4 1 Initial Start Up requirements 4 2 Tools and Instrumentation for Combustio...

Page 3: ...er 7 7 Exhaust Manifold and Combustion Chamber 7 8 Shutting boiler down for and extended period 7 9 Restarting after Prolonged Shutdown Section 8 TROUBLESHOOTING 8 1 8 0 Low Gas Pressure 8 1 High Gas Pressure 8 2 Low Water Level 8 3 High Water Temperature 8 4 Lock Out Run Flame 8 5 Lock Out Run Air Pressure 8 6 System Fault Low Air Pressure or Purge Interlocks APPENDICES A Temperature Controller M...

Page 4: ... the Benchmark ideally suited for modern low temperature as well as conventional heating systems Whether used in singular or modular arrangements the Benchmark offers the maximum flexibility in venting with minimum installation space requirements The Benchmark s advanced electronics are available in several selectable modes of operation offering the most efficient operating methods and energy mana...

Page 5: ...e made WARNINGS MUST BE OBSERVED TO PREVENT SERIOUS INJURY WARNING BEFORE PERFORMING MAINTENANCE ON THE UNIT SHUT OFF GAS ELECTRIC TO THE UNIT WARNING THE EXHAUST VENT PIPE OPERATES UNDER A POSITIVE PRESSURE AND MUST BE COMPLETELY SEALED TO PREVENT LEAKAGE OF COMBUSTION PRODUCTS INTO LIVING SPACES WARNING DO NOT USE MATCHES CANDLES FLAMES OR OTHER SOURCES OF IGNITION TO CHECK FOR GAS LEAKS WARNING...

Page 6: ...OWN After prolonged shutdown it is recommended that the startup procedures in Section 4 and test procedures in Section 6 of this manual be performed to verify system operating parameters If there is an emergency turn off the electrical power supply to the Aerco boiler and close the manual gas valve located before the unit The installer is to identify the emergency shut off device ...

Page 7: ... made clear to the delivering carrier 2 2 UNPACKING Carefully unpack the unit by removing the packaging material Take care not to damage the unit jacket when cutting away packaging materials A close inspection of the unit should be made to determine if there has been any damage not indicated by the Tip N Tell The freight carrier should be notified immediately if any damage is detected The followin...

Page 8: ...ag screws securing the boiler to the shipping skid Lift the unit off the shipping skid and position it on to the four inch high mounting pad required in the desired location If anchoring the unit see the dimensional drawing in appendix F for their location USE ONLY THE LIFTING LUGS TO MOVE THE UNIT In multiple unit installations it is important to plan the position of each unit Sufficient space fo...

Page 9: ...and Supply Design Guide GF 1030 must be consulted before any gas piping is designed or started WARNING DO NOT USE MATCHES CANDLES FLAMES OR OTHER SOURCES OF IGNITION TO CHECK FOR GAS LEAKS CAUTION Many soaps used for gas pipe leak testing are corrosive to metals The piping must be rinsed thoroughly with clean water after leak checks have been completed NOTE All gas piping must be arranged so that ...

Page 10: ...he gas supply regulator must be properly vented to outdoors Consult the local gas utility for exact requirements concerning venting of supply gas regulators NOTE If a regulator other than the Maxitrol RV 91 supplied with the boiler is used it must be capable or regulating 2 000 000 BTU HR of natural gas while maintaining 7 W C to the boiler CAUTION A lockup style regulator must be used when gas su...

Page 11: ...on the control box in such a manner that it does not interfere with the removal of any sheet metal covers see figure 2 9 for knockout location 2 6 MODE OF OPERATION and FIELD CONTROL WIRING The BENCHMARK Boiler is available in several different modes of operation While each unit is factory configured and wired for a particular mode some field wiring may be required to complete the installation Thi...

Page 12: ...al from an energy management system or an external controller The 4 20mA is linearly mapped to a 40 220o F set point or to 0 to 100 input All supplied 4 20mA signals must be a floating ungrounded signal Connections between the 4 20mA source and the unit s control wiring terminals must be made using a twisted shielded pair of 18 22 AWG wire such as Belden 9841 see Fig 2 11 The shield is connected o...

Page 13: ... calculated as part of the equivalent length For a natural draft installation the draft must not exceed 0 25 0 25 W C These factors must be planned into the vent installation If the maximum allowable equivalent lengths of piping are exceeded the unit will not operate properly or reliably 2 11 COMBUSTION AIR The AERCO Venting and Combustion Air Guide GF 2050 MUST be consulted before any flue or com...

Page 14: ...on air ducting pressure losses must be taken into account when calculating the total maximum allowable venting run See the AERCO Venting and Combustion Air Guide GF 2050 When using the boiler in a sealed combustion air configuration each unit must have a minimum 8 diameter connection at the unit 2 12 UNIT INITIAL FILL Before filling the unit s shell for the first time blow out all the connecting w...

Page 15: ...essary information required to effectively operate and troubleshoot this unit A 4amp circuit breaker is provided to protect the control circuits There are six separate accessible controls or displays available to the operator see Fig 3 1 These are 1 The Temperature Controller 2 The Annunciator Function Switches 3 Circuit Breaker 4 The Combustion Safeguard Controller 5 Water Level Test and Reset Sw...

Page 16: ... for Heat indicates whether the temperature controller s internal start relay is open or closed see Fig 3 2 The start relay is part of the start sequence closing when the control signal reaches 25 or higher This lights the Demand for Heat LED and begins the combustion process The start relay opens when the control signal is 19 9 or lower shutting the Demand for Heat LED and stopping the combustion...

Page 17: ...ON Do not leave the unit unattended while in the manual mode of operation WARNING WHEN SWITCHING FROM AUTO TO MANUAL MODE THE UNIT WILL CONTINUE TO OPERATE AT THE SAME FIRING RATE PERCENTAGE AS WHEN THE UNIT WAS IN AUTO MODE To access the firing rate percentage press the MENU button while in the primary menu until Pct is displayed in the lower LED While in manual mode see section 3 3 4 use the or ...

Page 18: ...es or changing the unit mode of operation To access the secondary menu press the arrow key and ENTER simultaneously To scroll through the menu press the MENU button The secondary menu allows access to the following temperature control features Func Mode of 0peration REFT Building reference temperature RR Reset Ratio OSAT Outside air sensor feature Oat Maximum outside air temperature that unit is e...

Page 19: ... CLEAR button to move through the SET DATE display fields Use the and arrow keys to set the date and time The following table shows the messages displayed after accessing the CYCLES and SET DATE displays CYCLES DATE TIME The number of times the controller has completed it s start cycle and the time and date of the last reset SET DATE DATE TIME Displays and allows setting of the date and time 3 5 2...

Page 20: ...h LED s A reset button located on the combustion safeguard is used to reset it after a lockout The combustion safeguard will shut the unit down if one of the following occurs DESCRIPTION FUNCTION POWER Lights when the limit string is satisfied and there is a call for heat PILOT Lights when the air flow circuit is satisfied FLAME Lights during the trial for ignition period MAIN Lights once flame ha...

Page 21: ... power to the boiler s safety controls 3 9 STARTING SEQUENCE When the unit is in the standby mode and there is a demand for heating the following will occur 1 Upon demand the temperature controller s ON status indicator will light 2 The combustion safeguard s OPR CTRL LED lights and the blower contactor energizes starting the blower Figure 3 11 Proof of Closure Switch Location 3 The system next ch...

Page 22: ...ssage FLAME PROVEN The unit provided it is in the automatic mode will now be controlled by the temperature control system Figure 3 14 Air Fuel Valve in Ignition Position Engaging the Ignition Position Switch 3 10 AFTER FLAME Once the control signal has dropped below the stop level see section 3 12 for Stop Level explanation the combustion safeguard closes the safety shut off valve extinguishing th...

Page 23: ... access the test jacks remove the combustion safeguard cover by turning the center screw counterclockwise A standard voltmeter is required to monitor the flame signal strength The combustion safeguard will output a 0 15VDC signal from the test jacks The minimum required flame signal for operation of the burner is 6 VDC Figure 3 15 Flame Test Jack Location FLAME TEST JACKS ...

Page 24: ...GE THE UNIT AND MAY RESULT IN PERSONAL INJURY OR PROPERTY DAMAGE THIS IS NOT COVERED BY WARRANTY CAUTION All installation procedures in Section 2 must be completed before attempting to start the unit 4 2 TOOLS AND INSTRUMENTATION FOR COMBUSTION CALIBRATION To properly perform combustion calibration the proper instruments and tools must be used and correctly installed on the unit The following sect...

Page 25: ...read the tool into the regulator 4 Engage the tool s screwdriver blade into the regulator s adjustment screw slot 4 3 COMBUSTION CALIBRATION The Benchmark ships combustion calibrated from the factory Recalibration as part of a start up is necessary due to altitude gas BTU content gas supply piping and supply regulators Factory test data sheets are shipped with each unit as a reference It is import...

Page 26: ... 10o F 10 0 50ppm 0o F 10 4 50ppm 10o F 10 8 50ppm 20o F 11 3 50ppm Table 1 9 Adjust the differential regulator until the Oxygen is within the specified range in Table 1 NOTE Adjust only the differential regulator at 40 control signal do not adjust the iris air damper 10 Once the oxygen level is within the specified range at 40 lower the firing rate to 20 11 Oxygen levels at the 20 firing rate sho...

Page 27: ...age it from the regulator adjusting screw and then turning the tool out of the top of the regulator 4 Remove the gasket from the tool and place it back onto the regulator cap 5 Apply a drop of silicone to the regulator adjusting screw to lock its setting 6 Reinstall the cap and gasket back on the regulator Tighten the cap using a screwdriver or wrench 7 Remove all of the manometers and barbed fitt...

Page 28: ...erature will increase by 1 6 degrees to 71 6 degrees 5 1 3 OUTDOOR AIR TEMPERATURE SENSOR INSTALLATION The outdoor air temperature sensor must be mounted on the north side of the building in an area where the average outside air temperature is expected The sensor must be shielded from the sun s direct rays as well as direct impingement by the elements If a cover or shield is used it must allow fre...

Page 29: ...with the temperature controller The temperature must have the following functions set as shown to properly operate in the 4 20mA remote setpoint mode MENU FUNCTION SETTING Secondary Lore Re Secondary FUNC Cont Primary Auto ON While it is possible to change the settings of temperature related functions the unit is factory preset with settings that work well in most applications It is suggested that...

Page 30: ...the control box The signal must be floating ungrounded and the wire used must be a two wire shielded cable of 18 to 22 AWG Polarity must be observed and the shield must be connected to terminal 1 at the control wiring terminals The source end of the end must be left floating and not connected When driving multiple units each unit s wiring must conform to the above 5 4 2 4 to 20 MA DIRECT DRIVE STA...

Page 31: ...h boilers are installed to cover the space heating load on the design day however one or more units are used for the domestic load The theory behind this system is that the maximum space heating load and the maximum domestic hot water load do not occur simultaneously The boilers used for the domestic hot water are capable of switching between constant setpoint and BMS modes of operation These boil...

Page 32: ...til Auto is displayed 5 Use the and arrow keys to change Auto from ON to OFF The red MAN LED should now be lit 6 The unit is now in manual mode 7 Follow the above directions to change back to remote mode and auto ON When the boiler is switched to BMS mode the AERCO BMS controls the firing rate There are no setup requirements to the boiler s in this mode To operate the boiler in manual mode the tem...

Page 33: ... the 1 4 ball valve located at the low pressure gas switch is closed 2 Remove the 1 4 plug from the 1 4 ball valve 3 Install a 0 16 W C manometer or W C gauge where the 1 4 plug was removed 4 Slowly open the 1 4 ball valve 5 Place the unit in manual mode and fire between a 25 and 30 firing rate 6 Slowly close the manual gas shut off valve while monitoring gas pressure The unit should shut down and...

Page 34: ...N R ES ET Figure 6 2 Temperature Limit Switch Setting 3 Once the limit switch setting is approximately at the actual water temperature indicated by tout the unit should shutdown The fault light should be flashing and the message HIGH WATER TEMP should be displayed The ON OFF switch should not be illuminated and the unit should not start 4 Reset the temperature limit switch setting to its prior set...

Page 35: ...AC power to the unit 8 Reset the combustion safeguard and clear the annunciator display 6 7 LOCKOUT RUN FAULT TESTING 1 Turn the ON OFF switch to the OFF position 2 Remove SSOV cover by removing the screws securing the actuator to the valve body See Fig 6 5 3 Remove wire 149 or 148 from terminal 4 or 6 See Fig 6 6 4 Start the unit 5 The unit should shutdown and displays the message LOCKOUT RUN 6 C...

Page 36: ...sconnect wire 170 from the ignition position switch This is the switch closest to the blower of the unit See Fig 6 8 15 Restore AC power to the unit and reset the combustion safeguard 16 Start the unit in manual mode 17 The unit should lockout and display the message FLAME FAULT DURING IGN TRIAL 18 Disconnect AC power from the unit 19 Reconnect wire 170 to the ignition position switch 20 Replace t...

Page 37: ...urner shell 4 Insert the ignitor removal tool into the burner shell where the ignitor bushing was removed Fit the hexagonal end of the tool over the ignitor See Fig 7 1B Unscrew the ignitor from the burner head Remove the ignitor from the burner shell by grasping the contact end of the ignitor Figure 7 1A Spark Ignitor and Flame Detector Location Top View CAUTION The ignitor may be hot 5 The ignit...

Page 38: ... Unscrew the flame detector and remove it See Fig 7 1B 4 Inspect the detector thoroughly If eroded the detector should be replaced Otherwise clean the detector with a fine emery cloth 5 Reinstall the flame detector hand tight only 6 Reconnect the flame detector lead wire 7 Reinstall the rear side and top panels on the unit 7 4 COMBUSTION CALIBRATION Combustion settings must be checked at the inter...

Page 39: ...d replace the burner release gasket 10 Remove and replace the burner gasket 11 Beginning with the burner removed in step 8 of this section reinstall all the components in the reverse order that they were removed B U R N E R H O S EC L A M P 5 8 1 1N U T B O L T 5 1 6 1 6B O L T G A SP I P E Figure 7 3 Burner Disassembly Diagram NOTE The burner is heavy weighing approximately 25 pounds NOTE A compl...

Page 40: ...ENDED PERIOD OF TIME 1 If the boiler is to be taken out of service for an extended period of time one year or more the following instructions must be followed 2 Set switch on front panel to off to shut down the boiler s operating control 3 Turn off main power supply to unit 4 Close supply and return valves to isolate boiler 5 Close external gas supply valve 6 Open relief valve to vent water pressu...

Page 41: ...ssure to the unit is lower than 9 W C readjust the supply regulator until it s output is between 9 to 14 W C If a static supply pressure of 9 to 14 W C cannot be obtained proceed to step 8 4 If static pressure is already 9 to 14 W C or has been readjusted start the unit It may be necessary to depress the reset button on units having manual reset gas switches before the unit will restart 5 Observe ...

Page 42: ...as supply manifold as per Section 4 2 2 of this manual 2 Check the static pressure to the unit It should be between 9 to 14 W C 3 If the static pressure to the unit is higher than 14 readjust the supply regulator until it s output is less than 14 W C 4 Start the unit and raise the firing rate in 10 increments If gas pressure is less than 7 W C after reaching 100 input percentage readjust the gas t...

Page 43: ... Connect an AC voltmeter between wire 138 and the unit frame 4 Reapply AC power to the unit The AC voltmeter should read approximately 120 VAC If approximately 120 VAC is not read on the AC voltmeter proceed to section 8 3 2 5 If 120 VAC is read on the AC voltmeter disconnect power to the unit and ground the probe to the unit shell 6 Reconnect AC power to the unit If the fault still does not clear...

Page 44: ...switch reset button clear the annunciator display and restart the unit If the display does not clear and the unit does not restart proceed to step 5 Note It may be necessary to wait until the temperature has dropped 20 degrees or more before the temperature switch will reset 5 Check to see if the unit has an adjustable temperature switch If it does ensure that it s setting is not less than the dis...

Page 45: ...equire tuning to the loop or the header sensor may be incorrectly installed When setting up a BMS the HDR TEMP BW should be changed from 50 to 70 This will slow the rate at which the boilers ramp up resulting in less temperature overshoot at each individual boiler When checking the header sensor ensure that the sensor well is not bushed too far out of the supply header Also ensure that the actual ...

Page 46: ...ng the above measure the flame detector lead voltage as per Section 8 4 7 8 If the flame fault still persists after checking all of the above remove the burner and inspect for debris If the flame fault still persists after the above replace the combustion safeguard 8 5 3 SAFETY SHUT OFF VALVE 1 Start the unit 2 When the starting sequence reaches the ignition trial cycle observe the response of the...

Page 47: ...rbon build up on the flame detector indicates that unit may require combustion calibration 6 Check the combustion calibration settings as per Sections 4 2 and 4 3 8 5 6 IGNITION CIRCUIT 1 Disconnect AC power to the unit 2 Close the manual leak detection valve located between the safety shut off valve and the differential pressure regulator on the unit s gas manifold 3 Using a spare ignitor connect...

Page 48: ...D WIRE HAS A POTENTIAL OF 230 VAC 4 Reconnect AC power to the unit 5 An AC voltage reading of approximately 230 VAC should be observed 6 If 230 VAC is observed proceed to Section 8 4 2 Step 8 7 If 230 VAC is not observed disconnect AC power to the unit 8 Disconnect the 1 connector from the control panel 9 Referring to system schematic 161453 in Appendix H locate wire 135 10 Check wire 135 for cont...

Page 49: ...the firing rate percentage while listening to the unit 3 If a rumbling sound is heard at higher firing rates 60 to 100 combustion calibrate the unit as per sections 4 3 and 4 4 8 6 3 BLOWER 1 Locate wire 81 83 on the motor contactor located inside the control panel 2 Connect an AC voltmeter between wire 81 and wire 83 and the unit frame 3 Start the unit 4 The AC voltmeter should measure between 20...

Page 50: ...ure Switch 8 6 6 Air fuel Valve Open Proving Switch 8 6 7 Air Fuel Valve not Rotating 8 6 8 Air Fuel Valve Ignition Position Switch Recommended Troubleshooting Equipment DVM 8 7 1 DETERMINING THE CAUSE 1 Clear the Annunciator and start the unit 2 If the blower does starts and the message SYSTEM FAULT PURGE INTERLOCKS is displayed proceed to section 8 6 4 3 If the blower does not start and the mess...

Page 51: ...el valve open proving switch and the Annunciator still displays SYSTEM FAULT PURGE INTERLOCKS proceed to section 8 6 6 8 7 5 SSOV PROOF OF CLOSURE SWITCH 1 Disconnect AC power to the unit 2 Loosen the two setscrews securing the safety shut off valve actuator to the safety shut off valve body 3 Rotate the actuator portion clockwise exposing the electrical cover plate and tighten the two previously ...

Page 52: ...ere wires 171 and 172 were located 8 Manually depress the switch and check the ohmmeter for continuity 9 If the switch shows continuity proceed to Step 11 10 If the switch does not show continuity replace the switch 11 Disconnect the 1 connector from the control panel 12 Referring to system schematic 161453 in Appendix H locate wires 171 and 172 Check wires 171 and 172 for continuity 13 Check for ...

Page 53: ...lts replace the temperature controller 8 7 8 AIR FUEL VALVE IGNITION POSITION SWITCH 1 Disconnect AC power to the unit 2 Remove the air fuel valve cover 3 Referring to system schematic 161453 in Appendix H locate wires 169 and 170 Remove wires 169 and 170 from the air fuel valve ignition position switch noting their position The air fuel valve ignition position switch is the one closest to the she...

Page 54: ... on Setpoint is the desired outlet water temperature that is to be maintained by the boiler when operating in automatic mode When set to automatic mode ON the temperature controller receives and processes inputs from temperature sensor s located externally or on the unit The controller uses these inputs to automatically decrease or increase the firing rate to match the load In manual mode OFF the ...

Page 55: ...chosen to enable or disable the unit This displays the outside air temperature that the unit is enabled This parameter is displayed only when OSAT is on This is Low Limit Temperature It is the minimum value that the Setpoint SetP can be set to To adjust use the and arrow keys Press ENTER to accept any changes This is High Limit Temperature It is the maximum value that the Set point SetP can be adj...

Page 56: ... This adjusts response time to temperature changes at the outlet of the unit This displays the address for the controller It is used for external communication with a computer This changes the local remote status of the controller In local mode all external computer write commands are ignored Read commands still function In remote both read and write comands from an external computer will function...

Page 57: ...ature will increase per degree with each degree change in outside air temperature This menu item turns the outside air enable disable feature on or off When ON an outside air temperature can be chosen to enable or disable the unit Oat displays the outside air temperature that the unit is enabled This parameter is displayed only when OSAT is on This is Low Limit Temperature alarm This feature shuts...

Page 58: ...ature This is the integral rate in minutes for the feedback of the controller It is adjusted with the arrow keys Press ENTER to accept changes This is the derivative rate in 1 sec This adjusts response time to temperature changes at the outlet of the unit This displays the address for the controller It is used for external communication with a computer This changes the local remote status of the c...

Page 59: ...U to SECONDARY MENU Press ENTER and the arrow key The display will indicate SECONDARY MENU to PRIMARY MENU Press INDEX and the arrow key The display will indicate NOTE When in the Secondary menu the first menu parameter Func must be displayed in order to switch to another menu NOTE The number 120 shown above is arbitrary This number is dependent on the actual outlet water temperature of the unit b...

Page 60: ...he INDEX key and arrow key OR while in secondary menu press and hold ENTER and for 5 seconds The display will indicate SECURE MENU to the SECONDARY MENU Pressing either INDEX and arrow key or ENTER and the arrow key will return you to the SECONDARY menu The display will indicate NOTE Anytime the SECURE menu is entered the unit will shut down It will resume normal operation upon going back to the P...

Page 61: ...ltaneously press INDEX and the arrow key To return to the first menu item of the SECONDARY menu from any other SECONDARY menu item without scrolling simultaneously press the INDEX and the arrow key CHANGING MENU ITEM VALUES To change the value of a selected menu item press either the arrow key to increase the item value or the arrow key to decrease the item value Press ENTER to accept the change N...

Page 62: ...APPENDIX C ix Temperature Sensor Resistance Chart Balco ...

Page 63: ...0 193 206 20F 92 106 120 134 148 162 176 190 204 218 Header Temperature for a Building Reference Temperatrure of 60F RESET RATIO Air Temp 0 6 0 8 1 0 1 2 1 4 1 6 1 8 2 0 2 2 2 4 60F 60 60 60 60 60 60 60 60 60 60 55F 63 64 65 66 67 68 69 70 71 72 50F 66 68 70 72 74 76 78 80 82 84 45F 69 72 75 78 81 84 87 90 93 96 40F 72 76 80 84 88 92 96 100 104 108 35F 75 80 85 90 95 100 105 110 115 120 30F 78 84 ...

Page 64: ...13 129 145 161 177 193 209 20 116 133 150 167 201 218 Header Temperature for a Building Reference Temperature of 70F RESET RATIO Air Temp 0 6 0 8 1 0 1 2 1 4 1 6 1 8 2 0 2 2 2 4 70F 70 70 70 70 70 70 70 70 70 70 65F 73 74 75 76 77 78 79 80 81 82 60F 76 78 80 82 84 86 88 90 92 94 55F 79 82 85 88 91 94 97 100 103 106 50F 82 86 90 94 98 102 106 110 114 118 45F 85 90 95 100 105 110 115 120 125 130 40F...

Page 65: ...0 135 150 165 180 195 210 5F 123 139 155 171 187 203 219 10F 126 143 160 177 194 211 15F 129 147 165 183 201 219 Header Temperature for a Building Reference Temperature of 80F RESET RATIO Air Temp 0 6 0 8 1 0 1 2 1 4 1 6 1 8 2 0 2 2 2 4 80F 80 80 80 80 80 80 80 80 80 80 75F 83 84 85 86 87 88 89 90 91 92 70F 86 88 90 92 94 96 98 100 102 104 65F 89 92 95 98 101 104 107 110 113 116 60F 92 96 100 104 ...

Page 66: ...122 126 130 134 138 65F 105 110 115 120 125 130 135 140 145 150 60F 108 114 120 126 132 138 144 150 156 162 55F 111 118 125 132 139 146 153 160 167 174 50F 114 122 130 138 146 154 162 170 178 186 45F 117 126 135 144 153 162 171 180 189 198 40F 120 130 140 150 160 170 180 190 200 210 35F 123 134 145 156 167 178 189 200 30F 126 138 150 162 174 186 198 210 25F 129 142 155 168 181 194 207 20F 132 146 ...

Page 67: ...T HIGH LIMIT TEMPERATURE 220 pb1 PROPORTIONAL GAIN 70 int INTEGRAL 1 drt DERIVATIVE 0 off addr ADDRESS 32 lore LOCAL REMOTE MODE LOC SECURE secr SECURITY LEVEL 3 func MODE OF OPERATION CONT gain GAIN 1 pb3 PROPORTIONAL BAND 5000 lofi LOW FIRE 29 lfti LOW FIRE TIMER 0 purg PURGE 100 O2 O STOP LEVEL 20 O2 C START LEVEL 25 FLTI FAULT TIMER 40 SEC DFIL DISPLAY FILTER 5 ARUP ANTI RESET WINDUP ON PEA PE...

Page 68: ...RE OFF OAt OUTSIDE AIR TEMP 0 LLt LOW LIMIT TEMPERATURE 40 HLt HIGH LIMIT TEMPERATURE 220 Pb1 PROPORTIONAL GAIN 70 Int INTEGRAL 1 drt DERIVATIVE 0 off Addr ADDRESS 32 LOrE LOCAL REMOTE LOC SECURE MENU SECr SECURITY LEVEL 3 Func MODE OF OPERATION OART gAin GAIN 1 Pb3 PROPORTIONAL BAND 5000 LoFi LOW FIRE 29 LFti LOW FIRE TIMER 0 Purg PURGE 100 O2 O STOP LEVEL 20 O2 C START LEVEL 25 FLti FAULT TIMER ...

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Page 74: ...APPENDIX G xviii ...

Page 75: ...APPENDIX G xix ...

Page 76: ...APPENDIX H xxi ...

Page 77: ...t monthly Operator Visual inspection for condition or obstructions Igniter Weekly Operator see section 7 2 main fuel valve valve position Weekly Operator Check position indicator leakage test annually Service technician Close manual fuel supply valve and test for pressure on down stream valve port Combustion safety flame failure weekly Operator Close manual fuel supply valve check safety shutdown ...

Page 78: ...ility if such item has been improperly installed operated or maintained or if the buyer has permitted any unauthorized modification adjustment and or repairs to the item The warranty as set forth on the back page of the Operations Maintenance Manual is in lieu of and not in addition to any other express or implied warranties in any documents or under any law No salesman or other representative of ...

Page 79: ...ed or if the buyer has permitted any unauthorized modification adjustment and or repairs to the item The use of replacement parts not manufactured or sold by AERCO will void any warranty express or limited In order to process a warranty claim a formal purchase order number is required prior to shipment of any warranty item In addition the returned item must include a Returned Goods Authorization R...

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