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APPENDIX A:  LOW WATER CUT OFF (LWCO) ON HOT WATER BOILERS 

(continued)

 

How to Test

 

Shut off fuel supply.  Close shut-off valves in system 

supply and return piping located in near boiler piping 

above LWCO as shown in Figure A1.  Open drain valve 

to lower water level until water is below the LWCO 

probe.  It may be necessary to open relief valve seat to 

allow air into system for the water to drain, close drain 

valve and relief valve once completed.  Generate a 

boiler demand by turning up thermostat.  Boiler should 

not attempt to operate.  Open fill valve to increase the 

water level by filling the system. It may be necessary 

to open relief valve to allow air to escape during filling 

process. The boiler should attempt to operate once the 

water level is above the LWCO.

Содержание V13A RO/FO

Страница 1: ...vice or repairs to boiler call your heating contractor or oil supplier When seeking information on boiler provide Boiler Model Number and Serial Number as shown on Rating Label located on top of the b...

Страница 2: ...ace rust on cast iron sections may be attributed to the manufacturing process as well as condensation during storage Surface rust is normal and does not affect the performance or longevity of a boiler...

Страница 3: ...contractor to see that all controls are correctly installed and are operatingproperlywhentheinstallationiscompleteincludingverifyingthatthelimitsensorisfullyinstalled Failure to properly install Limit...

Страница 4: ...e joints may be signs of condensing fluegases Fluegascondensateiscorrosive whichrequiresspecialconsiderationandmustbeaddressed immediately Refer to Venting Natural Draft Chimney listed in Table of Con...

Страница 5: ...5 SECTION I GENERAL INFORMATION Figure 1 VI RO FO Water Boiler with Tankless Heater Beckett AFG Burner...

Страница 6: ...rking Pressure Water 30 PSI Water Only Boiler Model No Burner Capacity AHRI NET Ratings Tankless Heater Capacity Minimum Chimney Requirements AFUE GPH MBH DOE Heating Capacity MBH Water MBH V1 2 Heate...

Страница 7: ...space Iftheresultislessthan50ft3 1000 BTU per hour then the space is considered a confined space 4 For boiler located in an unconfined space of a conventionally constructed building the fresh air infi...

Страница 8: ...r Tilt boiler and remove crate skid Care should be exercised to prevent damage to Jacket or Burner C MOVE BOILER TO PERMANENT POSITION by sliding or walking D INSPECT COMBUSTION TARGET WALL 1 OPEN FLA...

Страница 9: ...njury or loss of life due to elevated operating temperatures and or pressures III INSTALLATION INSTRUCTIONS continued Figure 4 Limit Sensor Insertion Figure 5 Securing Limit Sensor 3 Securing Limit Se...

Страница 10: ...pany s standard warranty There are many possible causes of oxygen contamination such as a Addition of excessive make up water as a result of system leaks b Absorption through open tanks and fittings c...

Страница 11: ...it must be mounted in the system piping above the boiler The minimum Figure 8 Recommended Piping for Combination Heating Cooling Refrigeration System III INSTALLATION INSTRUCTIONS continued safe wate...

Страница 12: ...is accomplished by installing hose bibs as illustrated in Figure 9 and allowing water at city pressure to run into hose bibA through the heater and out hose bib B until the discharge is clear The tees...

Страница 13: ...THE OUTLET OF THE BOILER TO THE CHIMNEY MUST BE INSTALLED ACCORDINGTONFPA211 ORLOCALCODES Refer to Figures 11 12 and 13 Figure 11 Installation of FO in a Confined Space with Adjacent Chimney NOTE 1 Ty...

Страница 14: ...lon of fuel input to the burner 3 Keep right side of boiler accessible for flue cleanout and tankless coil maintenance 4 Boiler is heavily insulated and is suitable for 1 clearance from jacket surface...

Страница 15: ...of boiler accessible for flue cleanout and tankless coil maintenance 4 Boiler is heavily insulated and is suitable for 1 clearance from jacket surface to combustibles 5 Boiler is of wet base design an...

Страница 16: ...efficiency than the boiler being replaced That probably means that the stack temperature from the new boiler will be lower than that from the old boiler and with less room air being drawn up the chimn...

Страница 17: ...jacket junction boxes and or control boxes 3 Use armored cable BX over all exposed line voltage wiring 4 If an indirect water heater is used use priority zoning Do not use priority zoning for Hydro Ai...

Страница 18: ...CTRICAL continued Figure 15 Schematic Wiring Diagram with Tankless Heater Warm Start Control Beckett Burner Refer to Figure 16 for Schematic wiring diagram of appropriate burner and oil primary contro...

Страница 19: ...ELECTRICAL continued Figure 16 Schematic Wiring Diagrams For Beckett GeniSys Oil Primary Control NOTE APPLY THIS BURNER SCHEMATIC TO APPROPRIATE STEAM OR WATER BOILER CONTROL SCHEMATIC REFER TO FIGUR...

Страница 20: ...When zone valve is completely purged of air close zone valve or shut off valve Open zone valve to the next zone to be purged Repeat this step until all zones have been purged At completion open all z...

Страница 21: ...osen the splined nut and hex head screw securing the escutcheon plate to the burner housing ii Place the end of a ruler at the leading edge of the head and using a straight edge across the end of the...

Страница 22: ...22 VI SYSTEM START UP continued Figure 17 L1 Fixed Head Electrode Positioning and Gun Setting Beckett AFG Figure 18 F Fixed Head Electrode Positioning and Gun Setting Beckett AFG...

Страница 23: ...chimney has reached operating temperature and while burner is running Burner will operate with a positive draft over fire and zero draft in the breeching Adjust Draft Regulator such that maximum draf...

Страница 24: ...with a clean cloth until clean then replace and readjust oil pressure If dripping or after burn persist replace fuel pump I TEST CONTROLS 1 Check thermostat operation Raise and lower thermostat setti...

Страница 25: ...and the resistance measured with a meter in the conventional way Conduct these tests with flame present see chart below Flame Detection Range Normal 0 1600 ohms Limited 1600 ohms to lockout 3 Check Oi...

Страница 26: ...g The burner should shut down and circulators continue running c Allow the temperature to drop below control setting The burner must restart d Boiler installation is not considered complete until this...

Страница 27: ...hermostat is not satisfied and the Operating Setpoint SP is reached the system circulator will continue to operate and the burner will stop When the boiler water temperature drops below the setpoint l...

Страница 28: ...F Adjust Low Limit Setting Ldf 10 25 F Adjust Low Limit Differential Setting ZC_ ZR or dh ZC and ZR Terminal Function Or_ 0 10 minutes Pump Overrun Time PP_ 0 20 minutes Pump Pre purge Time St_ 140 1...

Страница 29: ..._ 2 Minutes g Start Temperature The amount of Heat available is calculated by taking the difference between measured boiler water temperature and the Start Temperature setting Useful Heat Available is...

Страница 30: ...ervice heating zone 1 A second zone s thermostat may be wired to the ZR input to energize heating zone 2 circulator wired to the ZC output Both outputs function independently TT input controls only th...

Страница 31: ...as previously described test the pH of the water in the system This can easily be done by drawing a small sample of boiler water and testing with hydrion paper which is used in the same manner as lit...

Страница 32: ...corners 3 Always keep the manual fuel supply valve shut off if the burner is shut down for an extended period of time 4 To recondition the heating system in the fall season after a prolonged shut down...

Страница 33: ...immediately C TO CLEAN TOP OF BOILER SECTION 1 Remove smokepipe from flue collar of canopy see Figure 1 2 Using wire or fibre bristle brush and vacuum clean top of boiler through flue collar of canop...

Страница 34: ...Long sleeved loose fitting clothing 3 Gloves 4 Eye Protection Take steps to assure adequate ventilation Wash all exposed body areas gently with soap and water after contact Wash work clothes separatel...

Страница 35: ...ay pattern from the nozzle The smaller the firing rate the smaller the slots become in the nozzle and the more prone to plugging it becomes with the same amount of dirt 6 WATER Water in the fuel in la...

Страница 36: ...the oil primary control Hard Lockout will occur if the Oil Primary Control locks out three 3 times during a call for heat This is indicated by red light reset button solid on C INTELLIGENT OIL BOILER...

Страница 37: ...ng safety output relay check sequence or un powered during running or powered in idle in combination with water temperature above 264 F limit Cycle power to the control Replace control if problem pers...

Страница 38: ...le distributor Should you require assistance in locating a U S Boiler Company Distributor in your area or have questions regarding the availability of U S Boiler Company products or repair parts pleas...

Страница 39: ...l 1 1 8202701 7 Tie Rod Sets Tie Rods 3 8 16 x 12 1 2 Lg 2 80861010 Tie Rods 3 8 16 x 17 Lg 2 80861011 Hex Nuts 3 8 16 4 4 80860400 Flat Washers 3 8 4 4 80860600 8 Burner Mounting Plate Insulation 1 1...

Страница 40: ...40 XI REPAIR PARTS continued Figure 25 Flush Jacket Components...

Страница 41: ...RO FO Top Rear Wrapper Assembly 1 60422034 1 60422044 4 Jacket Right Side Heater Panel Assembly 1 60422033 1 60422043 5 Jacket RO FO Front Panel Assembly 1 1 6042212 6 Additional Boiler Top Insulatio...

Страница 42: ...42 XI REPAIR PARTS continued Figure 26 V1 RO FO Trim and Controls...

Страница 43: ...askets Taco 00 2 2 806602006 Temperature Sensor Clip 1 1 102422 01 Cable Clamp 5 16 3 3 8136073 Sheet Metal Screw 8 x 1 2 3 3 80860000 3 Miscellaneous Parts Bag Group Shipped in Misc Parts Carton 3A D...

Страница 44: ...BURNER PARTS CONTACT YOUR WHOLESALER OR THE BURNER MANUFACTURER R W BECKETT CORP 38251 CENTER RIDGE RD P O BOX 1289 ELYRIA OHIO 1 800 645 2876 44036 XI Repair Parts continued FIGURE 27 BECKETT AFG OI...

Страница 45: ...ulkhead 3666 3666 Connector Tube Assembly 5394 5394 Electrode Clamp 149 149 Electrode Clamp Screw 4219 4219 Electrode Insulator Assembly Kit 5780 5780 Nozzle Line LT Assembly Less Head Electrodes LT05...

Страница 46: ...to connect the probe LWCO to the supply or return piping as shown below Select the appropriate size tee using the LWCO manufacturer s instructions Often the branch connection must have a minimum diame...

Страница 47: ...ow the LWCO probe It may be necessary to open relief valve seat to allow air into system for the water to drain close drain valve and relief valve once completed Generate a boiler demand by turning up...

Страница 48: ...48 U S Boiler Company Inc P O Box 3020 Lancaster PA 17604 1 888 432 8887 www usboiler net...

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