Carrier 58CLA Installation, Start-up, And Operating Instructions Manual

Contents

Carrier 58CLA Installation, Start-up, And Operating Instructions Manual Manual pdf 7 page image

1. Correct nozzle size has been selected for desired input rate.2. Blower wheel support is removed.3. Electrical wiring is completed according to Fig. 3 or 4.4. Blower access door is secured in place.5. Valve on oil supply line is open.6. RESET BUTTON on primary control is pushed down.7. Flame observation door is closed.8. Thermostat is set for heating mode and set above roomtemperature.If all of the above items have been performed, set main electricalswitch to ON position and burner should start. When burner starts,proceed to Combustion Check section.Step 2-Combustion CheckIn order to obtain optimum performance from oil burner, thefollowing setup procedures must be followed:1. A test kit to measure smoke, stack draft, over-fire draft, oilpump pressure, CO 2, and stack temperatures MUST be used inorder to obtain proper air band setting. Although all of theabove measurements are required for optimum setup andefficiency data, the most important readings that must be takenare smoke number, over-fire draft, stack draft, and pumppressure.2. The proper smoke number has been established by engineer-ing tests to be between 0 and 1. This degree of smoke emissionis commonly referred to as a “trace” of smoke. It is recom-mended to use a Bacharach true spot smoke test set orequivalent.3. In order to ensure proper draft through furnace, a barometricdraft regulator (supplied with furnace) must be installed. Inorder for this device to function properly, barometric dampermust be mounted with hinge pins horizontal and face ofdamper vertical. (See instructions included with damper.) Thedraft regulator should be adjusted after furnace has been firingfor at least 5 minutes, and set between -0.025 and -0.035 in.wc. (See Table 9.)4. The over-fire draft, which is taken through observation door(located in center line above burner in front panel of furnace),is a measurement necessary to determine if there is a blockagebetween oil burner and flue outlet.There should be a total pressure drop of between 0.020 and0.05 in. wc through furnace as shown in Table 9. The over-firedraft must be set within the range shown in Table 9. A readingoutside the range shown in Table 9 (for example +0.1 in. wc)would indicate that furnace is in an extremely high-pressurecondition in primary section. This condition may be caused byany of the following problems:a. Excessive combustion air due to air shutter being too wideopen.b. A lack of flue draft (chimney effect) or some otherblockage, such as soot, in secondary section of heatexchanger.c. Use of an oversized nozzle input.d. Pump pressure over the values listed in Table 10.5. The CO2 and stack temperature instruments enable you toobtain data required to determine thermal efficiency of fur-nace.6. An oil filter should be installed as close to burner as possiblewith ALL oil burners and is essential on lower firing rateburners. We recommend the use of a low pressure drop oilfilter such as the General Filter, Inc. model #1A-25A orequivalent.7. The oil pressure regulator is factory set to give oil pressure of130 psig for the model having 105,000 BTUH input and 130psig for the model having 119,000 BTUH input. The firingrate noted on nameplate may be obtained using the nozzlesand pump pressures indicated in Table 10.8. On a new installation, air entrapped in oil line leading fromtank to nozzle must be thoroughly purged in order to preventexcessive after drip. The oil pump is provided with a specialfitting which allows purging of any air between tank and oilpump. The proper procedure for performing this operation isas follows:a. Place a piece of clear plastic 1/4-in. diameter tubing overpurge fitting on oil pump.b. Start oil burner, then open purge fitting and allow burner torun until purge tube is completely free of air bubbles.c. Tighten purge fitting. Allow oil to run to nozzle and fireburner.d. If purging takes longer than 15 sec and no flame has beenestablished, burner stops. Push reset button on front ofprimary control to restart burner.e. For detailed information on operation of primary control,refer to instructions included with furnace.After all the setup procedures mentioned above have been com-pleted, the burner should be allowed to operate and an inspectionmirror should be used to observe the flame pattern at tip of nozzle.Any irregularities such as burning to 1 side or pulsating flamepatterns should be corrected by changing nozzle.Step 3-Fan Adjustment CheckThis furnace is equipped with a 4-speed direct-drive motor todeliver a temperature rise within range specified on rating plate,between return and supply plenums, at external duct static pressurenoted on rating plate.When operating furnace in heating mode, static pressure andtemperature rise (supply-air temperature minus return-airtemperature) must be within those limits specified on ratinglabel. Failure to follow this warning could lead to severefurnace damage.Adjust fan speed ACCORDING TO OIL INPUT SELECTED sothat temperature rise is within rise range specified on rating plate.(See Table 11.) Consult wiring diagram for speed changes ondirect-drive motor.To adjust fan off time, set DIP switches on control board to obtaindesired timing. (See Fig. 5.)Table 9-Furnace Draft Conditions (In. WC)FURNACEINPUT(BTUH)FLUEDRAFTMINIMUMOVER-FIREDRAFTMAXIMUMTOTAL RESTRICTIONTHROUGHHEAT EXCHANGER70,000 -0.025 0.010 0.020 to 0.03591,000 -0.025 0.020 0.030 to 0.045105,000 -0.025 0.025 0.035 to 0.050119,000 -0.025 0.025 0.035 to 0.050140,000 -0.025 0.025 0.035 to 0.050154,000 -0.025 0.025 0.035 to 0.0507→