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3.8) DV-2000 TM Blocked intake / blockedvent test:For side-wall venting the furnace the DV-2000 TMventing system incorporates a safety shutdown systemthat will shut the burner down before a #1 smoke occursdue to the presence of a blocked intake or blocked ventoutlet. Test the system as follows:1. Ensure that the furnace has been running for atleast 10 minutes.2. Gradually block the intake. The burner flame shouldshut down before a #1 smoke reading occurs.3. Gradually block the vent outlet. The burner flameshould shut down before a #1 smoke readingoccurs.4. If the burner does not shut down before a #1 smokeoccurs, ensure that the burner is set up accordingto Part 2, section 3.4. Perform the CO2/ SmokeTest, and allow the 1.5% CO2 operating headroomrequired by the instructions.If the burner still does not shut down before a #1smoke occurs, check for blockage of the pressurehose, or at the hose connection points.IMPORTANTThe DV-2000 TM safety shutdown system willact to shut down the burner flame during ablocked intake or blocked vent condition if andonly if the burner has been set up andcalibrated in accordance with Part 2, section3.4. Perform the CO2/ Smoke Test. Forinstance, if the burner is adjusted and final-setto a #1 smoke condition during normaloperation, the burner flame can't possibly shutdown before a #1 smoke occurs during ablockage condition.PART 3MAINTENANCE1) GENERALPreventive Maintenance:"Preventive maintenance" is the best way to avoidunnecessary expense and inconvenience. Haveyour heating system and burner inspected atregular intervals by a qualified service man.After inspection, a complete combustion test must beperformed after each annual service of the unit tomaintain optimum performance and reliability.Do not tamper with the unit or controls. Call yourservice technician.Before calling for service, check the following.a. Check oil tank gauge and check if the oil tank valvein oil is open.b. Check fuse or circuit breaker.c. Check if shut-off switch is "ON".d. Reset thermostat above room temperature.e. If ignition does not occur turn off the disconnectswitch and call your qualified service technician.Electrical shock hazard.Turn OFF power to furnace before anydisassembly or servicing.Failure to do so can result in propertydamage, bodily injury and/or death.When ordering replacement parts,complete furnace model number.1.1) Heat exchanger:The entire heat exchanger should beannually for soot accumulation. If theoperating normally there should veryspecify theinspectedburner islittle sootaccumulation. If the heat exchanger requires scaleremoval, use a wire brush first to loosen the scale andthen vacuum the soot and scale that has fallen into thesecondary heat exchanger (radiator) section. You will23 PreviousNext |