INSTALLATION AND OPERATION INSTRUCTIONS1-2SL 20-115 MODULATING GAS bOILERCode reQuireMentsThe SL 20-115 model was tested to and certified under CSA 4.9-2010 / ANSIZ21.13-2010.installation must conform to local codes, or in the absence of these, with thelatest editions of Can/Cga B149 and the Canadian electrical Code Part 1 CsaC22.2 no. 1.in the us, installations must conform to the current national Fuel gas Codeansi Z223.1 and the national electrical Code ansi/nFPa 70. Where requiredby jurisdiction, installation must conform to the standard for Controls and safetydevices for automatically Fired Boilers, ansi/asMe Csd-1. if there is anyconflict, then the more stringent requirement will apply.loCationthe sl series boilers are designed and approved for indoor installation (wall orrack mounting), with significant flexibility of location provided with the availableventing options. the boiler can be placed in an alcove, basement, closet or utilityroom. surrounding ambient conditions shall be 0°C to 50°C and less than 90%relative humidity.Install the boiler in areas where the combustion air source is not subject tochemical fouling or agricultural vapours. Exposure to corrosive chemicalfumes such as chlorinated and/or fluorinated hydrocarbons can reducethe life of a boiler. Cleaners, bleaches, air fresheners, refrigerants, aerosolpropellants, dry-cleaning fluids, de-greasers and paint-removers all containvapours which can form corrosive acid compounds when burned in a gas flame.airborne chlorides such as those released with the use of laundry detergentsare also to be avoided. For this reason, the indoor air venting option using airsurrounding the boiler should not be used in a laundry room. similarly, ensureany direct vent air source is not adjacent to a clothes dryer exhaust terminal.Avoid agricultural applications where the boiler and/or the intake air sourceare affected by ammonia and/or dust.locate the boiler where water leakage will not result in damage to the area. if alocation such as this cannot be found, a suitable drain pan should be installedunder the appliance. the boiler is not to be installed above carpeting.Boiler Weight – approximately 115 lbs / 52 kg. For support fasteners, use thesupplied 6 x 1/4” x 2 1/2” long lag screws. installer to supply 1/4” bolts if metalmounting systems are used. Fasteners are to be attached to solid materialcapable of supporting the combined weight of the boiler and piping assemblycomponents.other factors affecting potential mounting sites:• ensure minimum clearance requirements for combustible materials (seeTable 2) are satisfied.• Minimum 24" clearance at the front and 10” above is recommended foradequate servicing. Check local codes for additional access and serviceclearance requirements.• At a new construction site, or during renovations, action must be takento protect the boiler from drywall dust or other construction related1.21.3WARNINGKeep boiler area freeand clear of combustiblematerials, gasoline, andother flammable vapoursand liquids.WARNINGCombustion air must not bedrawn from areas containingcorrosive air from swimmingpools or spas, including airdirectly next to outdoor poolsand spasWARNINGThe boiler shall not beexposed to water leaks frompiping or components locatedoverhead. This includescondensation dropping fromun-insulated cold water linesoverhead.1.3