L.B. White Premier TS350 Owner's Manual And Instructions

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OUTLETGAUGEINLETGAUGEGAS CONTROLLOW HEATHIGH HEATOFFONLO HI0510152025303505101520253035ATTENTION■ The gas control valve in this heater is a two stagecontrol. This will allow the heater to operate at adecreased heat output when heating requirements areless than severe. The decreased output isapproximately one half the rated output of the heater.■ The following explains a typical procedure to be followedin checking gas pressures.■ The gas pressures will vary depending upon fuel type.■ Consult the dataplate on the heater or page 4 in thismanual for specific pressures to be used in conjunctionwith this procedure.■ Gas pressure measured at the inlet to the gas valve isInlet Pressure and gas pressure measured at the outletof the gas valve is Burner Manifold Pressure.MATERIALS REQUIREDQuantity Description2 Gas pressure gauges capable of readingup to 35 in. W.C. (may also be orderedfrom L.B. White, part # 00764)A. PPreparation1. Disconnect the heater from the electrical supply andclose the fuel supply valve to the heater.2. Open the case access panel at burner end of heater.3. Brush or blow off any dust or dirt in the vicinity of thegas control valve.Open the fuel supply valves to theheater and reconnect the heater electrical supply.B. GGauge IInstallation1. Locate the gas control pressure taps. See Fig. 29.Remove the pressure tap plugs using a 3/16 in. allenkey.2. Securely connect pressure gauges at these points.3. Open the fuel supply valves to the heater andreconnect the heater electrical supply.4. Start the heaterC. RReading PPressures1. With the heater operating, the pressure gaugesshould read the pressures specified on the dataplate.2. Do the readings at the inlet and outlet pressuregauges agree with that specified on the dataplate?If so, then no further checking or adjustment isrequired. Proceed to section D.3. If the inlet pressures do not agree with that specifiedon the dataplate, then the regulator controlling gaspressure to the heater requires adjustment.4. If the inlet pressure is correct but the burner manifoldpressure does not agree with that specified on thedataplate, then the high and low heat output featureof the gas control valve requires adjustment.5. Turn the thermostat down to its lowest setting.Remove the cap from the high and low heat adjustingscrews at the two stage pressure regulator on the gascontrol valve.6. Slowly turn up the thermostat until a pressure is readno greater than 2 in. W.C. (LP) or .8 in.W.C. (N.G.) atthe outlet pressure gauge. If less than 2 in. W.C.(L.P.) or .8 in. W.C.. (N.G.) is read, the low heat settingat the regulator on the gas control will requireadjusting. Turn clockwise to increase, orcounterclockwise to decrease.7. Turn the thermostat completely up. You should seethe gas pressure increase from 2 in. W.C. (L.P.) or .8in.W.C. (N.G.) at low heat to 8.0 in.W.C.(L.P.) or 3.5 in.W.C. (N.G.) high heat. If less or greater than 8.0 in.W.C. (LP) or 3.5 in. W.C. (N.G.), the high heat settingmust be adjusted clockwise or counterclockwiseaccordingly until proper pressure is achieved.D. CCompletion1. Once the proper inlet and burner manifold pressureshave been confirmed and/or properly set, close thefuel supply valve to the heater and allow the heater toburn off any gas remaining in the gas supply line.2. Disconnect the heater from its electrical supply andclose fuel supply valve.3. Remove the gauges.4. Install pressure tap plugs.5. Open fuel supply valve and reconnect electricalsupply to heater. Start the heater and check for gasleaks.7. Set thermostat to desired temperature.FIG. 29WARNING■ Do not disassemble the gas control valve.■ Do not attempt to replace any components of the gascontrol valve.■ The gas control valve must be replaced if any physicaldamage occurs to the control valve assembly.■ Failure to follow this warning will result in fire orexplosions, leading to injury or death to humans, andproperty damage.20OUTLET TAP INLET TAPGas Pressure Checks