York SUNLINE MagnaDRY DR180 Installation Manual

Also see for SUNLINE MagnaDRY DR 180: Submittal data sheet Installation manual

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York SUNLINE MagnaDRY DR180 Installation Manual Manual pdf 65 page image

127915-YIM-A-0405Unitary Products Group 65Adjust as follows:1. Remove the cap on the regulator. It's located nextto the push-on electrical terminals.2. To decrease the gas pressure, turn the adjustingscrew counterclockwise.3. To increase the gas pressure, turn the adjustingscrew clockwise.NOTE: The correct manifold pressure for these fur-naces is 3.65 IWG ±0.3.PILOT CHECKOUTThe pilot flame should envelope the end of the flamesensor. To adjust pilot flame, (1) remove pilot adjust-ment cover screw, (2) increase or decrease the clear-ance for air to the desired level, (3) be sure to replacecover screw after adjustment to prevent possible gasleakage.Put the system into operation and observe throughcomplete cycle to be sure all controls function properly.BURNER INSTRUCTIONSTo check or change burners, pilot or orifices, CLOSEMAIN MANUAL SHUT-OFF VALVE AND SHUT OFFALL ELECTRIC POWER TO THE UNIT.1. Remove the screws holding either end of the mani-fold to the burner supports.2. Open the union fitting in the gas supply line justupstream of the unit gas valve and downstreamfrom the main manual shut-off valve.3. Remove the gas piping closure panel.4. Disconnect wiring to the gas valves and spark igni-tors. Remove the manifold-burner gas valveassembly by lifting up and pulling back.Burners are now accessible for service.Reverse the above procedure to replace the assem-blies. Make sure that burners are level and seat at therear of the heat exchanger.BURNER AIR SHUTTER ADJUSTMENTAdjust burner shutters so no yellow flame is observedin the heat exchanger tubes.CHECKING GAS INPUTNATURAL GAS1. Turn off all other gas appliances connected to thegas meter.2. With the furnace turned on, measure the timeneeded for one revolution of the hand on the small-est dial on the meter. A typical gas meter usuallyhas a 1/2 or a 1 cubic foot test dial.3. Using the number of seconds for each revolutionand the size of the test dial increment, find thecubic feet of gas consumed per hour from the GasRate - Cubic Feet Per Hour Table 32.If the actual input is not within 5% of the furnace rating(with allowance being made for the permissible rangeof the regulator setting), replace the orifice spuds withspuds of the proper size.NOTE: To find the Btu input, multiply the number ofcubic feet of gas consumed per hour by theBtu content of the gas in your particular locality(contact your gas company for this information- it varies widely from city to city.)FIGURE 26 - PROPER FLAME ADJUSTMENT1/8"GAPBETWEENCARRY-OVERTUBEANDFLAMESENSORBULBCARRY-OVERTUBEFLAMESENSORBULBBURNERASSEMBLYBRACKETFIGURE 27 - TYPICAL FLAME APPEARANCE