Dunkirk Excelsior EXB Series Supplemental Instructions
Direct vent high efficiency oil-fired hot water boiler
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- Installation, operation & maintenance manual (64 pages)
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Direct Venting Of Oil Fired Boilers ..................................................................................... 2
Vent Terminal Locations ................................................................................................... 3
Vent Terminal Installation ................................................................................................ 4
Intake Air Pipe Installation ............................................................................................... 5
Vent Pipe Installation ...................................................................................................... 6
Blocked Vent Safety Shutoff System .................................................................................. 7
Sequence Of Operation ................................................................................................... 8
Final Check Out .............................................................................................................. 9
Burner Settings Tables .................................................................................................. 10
Burner Settings Tables .................................................................................................. 11
Wiring Diagrams ........................................................................................................... 12
Operation And Troubleshooting ....................................................................................... 14
SUPPLEMENTAL INSTRUCTIONS:
DIRECT VENT
INSTRUCTIONS FOR HIGH EFFICIENCY OIL-FIRED
HOT WATER BOILER
!
Installations of venting shall be done only by a
qualified expert and in accordance with these
instructions. Venting a boiler or any other oil
appliance with improper methods or materials may
result in serious injury or death due to fire or to
asphyxiation from poisonous gases such as carbon
monoxide which is odorless and invisible.
Keep area around vent terminal free of snow, ice, and
debris.
Information contained in this manual pertains to direct vent
boilers equipped with manufacturer installed blocked vent
safety control system (pressure switch).
WARNING
P/N 240009355, Rev. C [11/15/2015]
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Table of Contents
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Summary of Contents for Dunkirk Excelsior EXB Series
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Page 1: Table Of Contents
SUPPLEMENTAL INSTRUCTIONS: DIRECT VENT INSTRUCTIONS FOR HIGH EFFICIENCY OIL-FIRED HOT WATER BOILER Information contained in this manual pertains to direct vent boilers equipped with manufacturer installed blocked vent safety control system (pressure switch). WARNING Installations of venting shall be done only by a qualified expert and in accordance with these instructions. -
Page 2: Direct Venting Of Oil Fired Boilers
DIRECT VENTING OF OIL FIRED BOILERS Introduction F. Less than 1 foot (0.3m) above grade level within 6 feet (1.80m) of any combustion air inlet, unless • Direct Vent refers to sealed combustion system. appliance is otherwise certified. G. Within 6 feet (1.80m) of property line. •... -
Page 3: Vent Terminal Locations
VENT TERMINAL LOCATIONS Figure 2 - Vent Terminal Locations (Canada) D&E Forced air inlet F&K Figure 3 - Vent Terminal Location (USA) P/N 240009355, Rev. C [11/15/2015]... -
Page 4: Vent Terminal Installation
VENT TERMINAL INSTALLATION Vent Terminal Location Figure 4 - Inside View of Vent Terminal See table 1 for equipment certified for use with this appliance. Select location of wall penetration that conforms to code for exterior location: As close to appliance as possible, Maintains clearance to combustibles, Maintains minimum 1/4 inch per foot slope back to appliance. -
Page 5: Intake Air Pipe Installation
INTAKE AIR PIPE INSTALLATION Direct Vent Intake Air Pipe Installation Do not use Flexible duct for combustion air. Outdoor air for combustion must be used. Oil burners approved for use with outdoor air for combustion are Beckett NX and Riello 40BF. Outdoor air is obtained using the following materials/ methods. -
Page 6: Vent Pipe Installation
VENT PIPE INSTALLATION Figure 6 - Appliance Connector w/ Test Port WARNING Improper installation, adjustment, alteration, service or maintenance could result in death or serious injury. Do not enclose vent. Do not route vent through walls, floors or ceilings. Venting and vent terminal are dedicated to the Boiler only;... -
Page 7: Blocked Vent Safety Shutoff System
BLOCKED VENT SAFETY SHUTOFF SYSTEM Blocked Vent Safety Shut Off System (BVS) Beckett NX Burner: Direct vent Boiler is equipped with Blocked Vent Safety shut Refer to Table 2. Select head setting according to required off system (BVS). Safety circuit shuts burner off in event of firing rate. -
Page 8: Sequence Of Operation
SEQUENCE OF OPERATION Beckett NX Figure 9 - Flex Vent Assembly Detail Room temperature drops, thermostat calls for heat. Pre-purge begins, lasting 5 to 15 seconds. Oil solenoid and BVS are energized Oil Solenoid opens allowing oil to reach Burner Electrodes. -
Page 9: Final Check Out
FINAL CHECK OUT • Carefully examine complete vent system for leaks. This may be done by spraying soapy solution on all joints and watching for bubbles during pre-purge. The hot vent can be checked with lit taper for signs of air movement around joints or seams. -
Page 10: Burner Settings Tables
BURNER SETTINGS TABLES TABLE 1: THE HIGH EFFICIENCY OIL BOILER IS CERTIFIED FOR USE ONLY WITH THE FOLLOWING PART NUMBERS Items with Boiler Burner Termination Part Num- Vent Length Part number Field Supplied Items Part Num- Options Options Options Item Riello 4-7/8”... -
Page 11: Burner Settings Tables
BURNER SETTINGS TABLES Table 3: RIELLO 40BF DIRECT VENT PRELIMINARY BURNER SETTINGS Pump Rated Inser- Firing Com- Pressure Head Nozzle Nozzle Pres- Head AFUE Boiler Model tion Rate bustion Switch Type Mfr. Type sure Setting Setting Efficiency Depth [GPH] Liner Setpoint [PSI] 4075... -
Page 12: Wiring Diagrams
WIRING DIAGRAMS Figure 11 - Beckett NX With Blocked Flue Pressure Switch Safety (15 Seconds pre purge, 2 minutes post Figure 12 - Wiring Diagram: Beckett NX With Genisys 7505 purge) (BLUE/WHITE) (WHITE) (ORANGE) (WHITE) (BLACK) (RED) (WHITE) (VIOLET) (WHITE) (YELLOW) P/N 240009355, Rev. - Page 13 WIRING DIAGRAMS Figure 13 - Riello Wiring Diagram With Post Purge Timer And Blocked Flue Pressure Switch Safety If a neutral or ground lead is attached to terminal 4, the CONTROL BOX on the burner will be damaged should lockout occur. P/N 240009355, Rev.
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Page 14: Operation And Troubleshooting
OPERATION AND TROUBLESHOOTING NX Burner With Blocked Vent Safety (BVS) Operation External Action Appliance Response Internal safety check conducted. If no light or flame is detected and all internal conditions are correct, Power applied to burner control control enters idle mode. Thermostat Calls For Heat 1. Contacts between T and T on Aquastat L7248A are closed. - Page 15 OPERATION AND TROUBLESHOOTING Beckett NX BURNER TROUBLESHOOTING Condition 1: Burner motor does not start when there is a call for heat. Procedure Status Corrective Action 1. Check that limit switches are closed and contacts are clean. 2. Check for line voltage power at the oil primary control.
- Page 16 OPERATION AND TROUBLESHOOTING Condition 2: Burner starts then locks out on safety with red indicator light flashing. Procedure Status Corrective Action Indicator light stops Go to Step 2. flashing. 1. Reset oil primary control by pushing in and releasing Indicator light red reset button.
- Page 17 OPERATION AND TROUBLESHOOTING Beckett NX: System and General Troubleshooting Problem Possible Cause Remedy • Check thermostat and adjust. Also, check thermostat for accuracy; if it is a mercury Thermostat not calling for heat. switch type, it might be off level. • Check Boiler switch, main electrical panel Boiler fuse or circuit breaker. Also look for any No power to Boiler.
- Page 18 OPERATION AND TROUBLESHOOTING Beckett NX: System and General Troubleshooting Problem Possible Cause Remedy Electrodes out of adjustment or • Check electrode settings. Check electrodes for dirt build-up or cracks in defective. porcelain. Poor transformer high voltage connections or defective • Check contacts between the igniter and electrodes. If OK, replace the igniter transformer.
- Page 19 OPERATION AND TROUBLESHOOTING Riello 40BF blocked vent safety (BVS) Operation External Action Appliance Response • Burner enters pre-purge. • After pre-purge, oil valve is energized and burner lights off. Thermostat calls for heat. • Burner operates in run mode. • Normally closed pressure switch monitors for vent or combustion air intake blockage. • Oil valve circuit is de-energized and valve shuts off.
- Page 20 OPERATION AND TROUBLESHOOTING RIELLO 40BF Blocked Vent safety system (BVS) TROUBLESHOOTING Condition: Thermostat is calling for heat. Burner is not running. Problem Possible Cause Remedy Contacts closed. Go to step #2. Verify pressure tubing is connected properly and clear of obstructions. Test BVS pressure switch contacts Verify vent is not obstructed.
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