Installation, Operation And Maintenance Manual Oil Fired .

through a refrigeration unit unless theunit is specifically approved for suchservice.Generally, a six-inch clearance betweenthe air conditioning evaporator coil andthe heat exchanger will provide adequateairflow through the evaporator coil.The blower speed must be checked andadjusted to compensate for the pressuredrop caused by the evaporator coil.Refer to Appendix B for recommendedwiring and electrical connections of theair conditioning controls.COMBUSTION AIRWhen a furnace is installed in the fullbasement of a typical frame or brickhouse, infiltration is normally adequate toprovide air for combustion and draftoperation. If the furnace is installed in acloset or utility room, two (2) ventilationopenings must be provided connecting toa well ventilated space (full basement,living room or other room openingthereto, but not a bedroom or bathroom).One opening shall be located 6" from thetop and bottom of the enclosure at thefront of the furnace. For furnaces locatedinbuildingsofunusuallytightconstruction, such as those with highquality weather stripping, caulking,windows and doors, or storm sashedwindows, or where basement windowsare well sealed, a permanent openingcommunicating with a well ventilatedattic or with the outdoors shall beprovided, using a duct if necessary. Sizeall of the openings and associatedductwork by the standards provided inthe latest Oil Installation Code editions;NFPA 31 in the United States, CAN/CSAB139 in Canada. Take all fuel burningappliances in the area into considerationwhen calculating combustion andventilation air requirements.The Model CAS-2B-90E Furnace Bootmanufactured by Field Controls, Inc. maybe used with the furnace to obtaincombustion air from outdoors. Use of thisdevice does not alter the need forventilation air; however, it does provide agood source of combustion air and isconnected to the oil burner.CHIMNEY VENTINGThe chimney must be sized correctly andbe in good repair. If the chimney isoversized, there is a high risk of the fluegases condensing resulting in damage tothe chimney and other venting parts.This problem may be corrected by theuse of an appropriately sized chimneyliner.If the chimney serves the WML-Cfurnace only, the vent should be sized at5-inch minimum. The MPL-B should be6-inch minimum. The data provided inTable 3 is based on dedicated venting. Ifthe furnace is to be co-vented with otherappliances, refer to NFPA 211, Standardfor Chimneys, Fireplaces, Vents, andSolid Fuel-Burning Appliances, NFPA31, Standard for the Installation of OilBurning Equipment or CAN/CSA B139,Installation Code For Oil BurningEquipment for correct sizing information.NOTE: This furnace is approved foruse with L-Vent.NOTE: Maximum temperature for LVent is 575 F (300 C).IMPORTANT: The chimney must becapable of providing sufficient draft at alltimes for the safe removal of theproducts of combustion.The chimney should be tested under“winter” conditions; doors and windowsclosed, all other fossil fuel burningappliances on, clothes dryer on,bathroom fans on, etc. If the chimneycannot overcome the competition for air,it will be necessary to access the reasonfor it, and take corrective action. If thechimney is found to be sized correctlyand in good repair, it will probably benecessary to re-evaluate the availabilityof combustion and ventilation air, andtake corrective action.The flue pipe should be as short aspossible with horizontal pipes slopingupward toward the chimney at a rate ofone-quarter inch to the foot. The fluepipe should not be smaller in crosssectional area than the flue collar on thefurnace. The flue pipe should connect tothe chimney such that the flue pipeextends into, and terminates flush withthe inside surface of the chimney liner.Seal the joint between the pipe and thelining. The chimney outlet should be atleast two feet above the highest point ofa peaked roof. All unused chimneyopenings should be closed. Chimneysmust conform to local, provincial or statecodes, or in the absence of localregulations, to the requirements of theNational Building Code.THEFURNACEMUSTBECONNECTED TO A FLUE HAVINGSUFFICIENT DRAFT AT ALL TIMES TOENSURESAFEANDPROPEROPERATION OF THE APPLIANCE.The flue pipe must not be routed throughconcealed space, because it must nnualinspection and servicing. The flue pipemust not pass through any floor orceiling, but may pass through a wallwhere suitable fire protection provisionshave been installed. In the United States,refer to the latest edition of NFPA 31 forregulations governing the installation ofoil burning equipment. In Canada, referto the latest edition of CAN/CSA B139for rules governing the installation of oilburning equipment.NOTE: THE RECOMMENDED FLUEDRAFT PRESSURE IS -0.02 IN. W.C.(AS MEASURED UPSTREAM OF THEBAROMETRIC DRAFT REGULATOR).SHOWN IN FIGURE 1.DRAFT REGULATOR CONTROLThis device is used in conjunction withconventional chimney venting. Thiscontrol (or draft regulator) automaticallymaintains a constant negative pressurein the furnace to obtain maximumefficiency. It ensures that properpressures are not exceeded. If thechimney does not develop sufficientdraft, the draft control cannot functionproperly. The draft regulator, must beinstalled within the same room orenclosure as the furnace, and should notinterfere with the combustion air suppliedto the burner. The control should belocated a minimum of 3 flue pipediameters from the furnace breechingand installed in accordance to theinstructions supplied with the regulator.See Figure 2 and Table 2 for commonchimney problems and their remedies.530318 R4 9/9/2005

Fig. 2: Common Chimney ProblemsCan be foundby light andmirror reflectingconditions inchimney.Use weight tobreak anddislodge.Joist protrudinginto chimney.Lowering a lighton an extensioncord.Must behandled bycompetentmasonrycontractor.FBreak inchimney lining.Smoke test build smudgefire blocking offother opening,watching forsmoke toescape.Must behandled bycompetentmasonrycontractor.GCollection ofsoot at narrowspace in flueopening.Lower light onextension cord.Clean out withweighted brushor bag of loosegravel on endof line.HOffsetLower light onextension cord.Change tostraight or tolong offset.Found byinspection frombasement.The leastimportantopening mustbe closed,using someother chimneyflue.DEObstruction inchimneyITwo or moreopenings to thesame chimney.JLoose-seatedpipe in flueopening.Smoke test.Leaks shouldbe eliminatedby cementingall pipeopenings.KSmoke pipeextends intochimney.Measurementof pipe fromwithin orobservation ofpipe by meansof a loweredlight.Length of pipemust bereduced toallow end ofpipe to be flushwith inside oftile.LFailure toextend thelength of fluepartition to thefloor.By inspection orsmoke test.Extend partitionto floor level.MLoose-fittedclean-out door.Smoke test.Close all leakswith cement.Table 2: Common Chimney ProblemsRefer to Figure 2KeyTroubleDiagnosticRemedyATop of chimneylower thansurroundingobjectsObservationExtend chimneyabove allsurroundingobjects within30 feet.BChimney Capor ventilator.ObservationRemoveCCoping restrictsopening.ObservationMake openingas large asinside ofchimney.630318 R4 9/9/2005

OPTIONAL SIDE WALL VENTINGCertain WML-C AND MPL-B furnacemodels are manufactured to be installedas sidewall vented units. Please refer toDirect Venting Instructions, P/N 28888included with the Vent Kit for details.SidewallVenting(DirectVenting)requires the use of specific oil burners;the Beckett AFII, or the Riello 40BF.Please refer to Appendix A, Tables A2,and A4.Note: Sidewall venting requires specialattention to combustion air supply. Thereis no natural draft in the venting systembetween furnace cycles; therefore, if theindoor pressure is negative relative tothe outdoors, the vent terminal becomesa point of infiltration. This could lead tooil odour control problems. This problemis rectified by the use of ducted outdoorairforcombustion(semi-sealedcombustion), using the Beckett AFII orRiello 40BF oil burner. See Direct VentInstructions supplied with the Vent Kits.Table 3: Minimum Chimney BaseTemperatures ( F)NozzleChimney Height (ft.)11202836Chimney Thermal Resistance R6In general, the oil tank must be properlysupported and remain stable in bothempty and full condition. The oil tankmust be fitted with vent and supply pipesto the outdoors. Refer to the abovementioned codes for sizing. The ventpipe must be no less than 1¼ inchesI.P.S., and terminate with an appropriatevent cap in a location where it will not beblocked. The fill pipe must be no lessthan 2 inches I.P.S., and terminate withan appropriate cap in a location wheredebris will not enter the fill pipe during oildelivery.If located indoors, the tank shouldnormally be in the lowest level, (cellar,basement, etc.). It must be equippedwith a shut-off valve at the tank outletused for the oil supply. The oil tank mustbe located as to not block the furnace /room exit pathway. Observe allclearances specified in the abovementioned codes.PIPING INSTALLATIONIn the United States, NFPA 31, Standardfor the Installation of Oil BurningEquipment, Chapter 2.In Canada, the entire fuel system shouldbe installed in accordance with therequirements of CAN/CSA B139, andlocal regulations. Use only approved fueloil tanks piping, fittings and oil 4055050.75260320380475Ensure that all fittings used in a copperoil line system are high quality flarefittings. Do not use compression fittings.0.85250300355430Do not use Teflon tape on any fittings.1.00225300365430Pressurized or gravity feed installationsmust not exceed 3 PSIG. Pressuresgreater than 10 PSIG may causedamage to the shaft seal. If the height ofthe oil stored in a tank above the oilburner exceeds 11½ feet, it may benecessary to use a pressure-regulatingdevice approved for this purpose.NozzleChimney Height (ft.)11202836Chimney Thermal Resistance 0.751751851952100.851651851952051.00165185195205 - less than, - greater thanOIL TANKOil storage tanks must be selected andinstalled in compliance with applicablecodes; in the United States, NFPA 31,Standard for the Installation of OilBurning Equipment, Chapter 2. and inCanada, CAN/CSA-B139, InstallationCode for Oil Burning Equipment, Section6. Observe all local codes and by-laws.The furnace may be installed with a onepipe system with gravity feed or lift. Themaximum allowable lift on a single linesystem is 8 feet. Lift should be measuredfrom the bottom (outlet) of the tank, tothe inlet of the burner. Sizing a singleline system is complex because of thedifficulty estimating the pressure dropthrougheachfitting,bendandcomponent in the line. In general, keepsingle line systems short as possible.The following chart shows the allowableline lengths (horizontal vertical) forsingle and two-line oil piping systems. Alldistances are in feet.Table 4: Oil LinesCopper Tubing Oil Line Length (Feet)Lift(Feet)Single-Pipe ODTwo-Pipe --3710014------3210016------2710018------2288In retrofit applications, where an existingoil line system is in place, a vacuumcheck will help determine the efficacy ofthe existing oil line system The vacuumin a system should not exceed 6” Hg. fora single pipe system, nor 12” Hg. for atwo-pipe system.NOTE: The oil burner requires the use ofa bypass plug when converting fromsingle-pipe to two-pipe oil pipingsystems. See burner manufacturer’sinstructions.All fuel systems should include an oilfilter between the fuel oil storage tankand the oil burner. For best results,install the oil filter as close to the burneras possible. When using an indoor oiltank, the oil filter may be installed at thetank downstream from the shut-off valve.If firing the furnace under the 0.65 gphrate, a 7 to 10 micron line filter should beinstalled as close to the oil burner aspossible.ELECTRICAL CONNECTIONSThe furnace is listed by the CanadianStandards Association (CSA). It isfactory wired and requires minimal fieldwiring. In the United States, the wiringmust be in accordance with the NationalFire Protection Association NFPA-70,National Electrical Code, and with localcodes and regulations. In Canada, allfield wiring should conform to CAN/CSAC22.1 Canadian Electrical Code, Part 1,and by local codes, where they prevail.The furnace should be wired to aseparate and dedicated circuit in the730318 R4 9/9/2005

mainelectricalpanel;however,accessory equipment such as electronicair cleaners and humidifiers may beincluded on the furnace circuit. Althougha suitably located circuit breaker can beused as a service switch, a separateservice switch is advisable. The serviceswitch is necessary if reaching the circuitbreaker involves becoming close to thefurnace, or if the furnace is locatedbetween the circuit breaker and themeans of entry to the furnace room. Thefurnace switch (service switch) should beclearly marked, installed in an easilyaccessible area between the furnace andfurnace room entry, and be located insuch a manner to reduce the likelihoodthat it would be mistaken as a lightswitch or similar device.The power requirements for all models:120 VAC, 1 , 60 Hz., 12A.Accessories requiring 120 VAC powersources such as electronic air cleanersand humidifier transformers may bepowered from the ST9103 EFT. Do notuse the direct drive motor connections asa power source, since there is a high riskof damaging the accessories byexposure to high voltage from the autogenerating windings of the direct drivemotor.Thermostat wiring connections and airconditioning contactor low voltageconnections are shown in the wiringdiagrams.Somemicro-electronicthermostats require additional controlsand wiring. Refer to the thermostatmanufacturer's instructions.The thermostat should be locatedapproximately 5 feet above the floor, onan inside wall where there is goodnatural air circulation, and where thethermostat will be exposed to averageroom temperatures. Avoid locationswhere the thermostat will be exposed tocold drafts, heat from nearby lamps andappliances, exposure to sunlight, heatfrom inside wall stacks, etc.Normal heat anticipator setting: 0.1 A.For more precise adjustment, the heatanticipator may be adjusted to theamperage draw of the heating controlcircuit as measured between the "R" and"W" terminals of the thermostat. Toreduce the risk of damaging the heatanticipator, do not measure circuitwithout first removing one of the twowires first. To determine the heatingcircuit amperage draw:1.Disconnect one of the “R” or “W”wires from the thermostat terminal.2.Connect an ammeter between thewire and the thermostat terminal towhich it was attached.3.Note the amperage reading whenthe heating contacts are closed.(System switch must be on “HEAT” ifso equipped.4.Re-connect the thermostat wire. Ifthe thermostat is serving acombinationheatingandairconditioning system, pay particularattention to polarity.5.If the limit control opens with the UnitedTechnologies 1158-120 electronic fancontrol, the circulating fan will beenergized as well. When the limit closes,the control initiates a two minute delay.When this delay is finished, the fan offtimer will begin. At the end of the fan offtime cycle the burner will be energized,initiating a normal burner cycle.TABLE 5Hone

and operating the furnace. The furnace must be installed and set up by a qualified contractor. Model WML-C is an oil fired forced air multi-positional furnace, with an output capacity range of 58,000 BTU/Hr. to 85,600 BTU/Hr. The MPL-B is also an oil fired forced air multi-positional