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Resumen del manual
Watch plenum temperature as burner goes through a few cycles, to be sure that it is operating properly. 1. Hi-limit and cycling thermostat must be wired into heater control box for heater to operate. 2. Open all manual shutoff valves to heater unit. 3. Start fan. This will supply power to heater. 4. Turn thermostat dial to its highest setting. 5. Turn toggle switch on. Both red lights should light up indicating power to the control circuit. 6. Heater should now be lit. If not check to see that all gas is on. 7. Open low-fire ball valve all the way. 8. Turn thermostat dial back slowly until heater cycles to low flame. 9. Adjust ball valve so that low-flame pressure is at desired setting. 10. Turn thermostat dial to desired setting and wait for bin plenum to come up to temperature. Heater should cycle to low flame after a few minutes. If heater does not cycle to low flame increase hi-flame gas pressure. 11. Low-flame should be adjusted so that temperature drops slowly until burner goes back to high flame. 12. Watch as burner goes through a few cycles, to be sure that it is operating properly, back to high flame. Deluxe Vane Axial Heater OPERATING PROCEDURE Modulating Valve Operation 1. The modulating valve regulates gas flow through the heater based on sensing unit in the plenum, and maintains a constant drying air temperature. 2. The sensing bulb of the modulating valve should be mounted through the bin wall with the side reading "top" up. The bulb reacts to temperature. It changes the amount of gas (increase or decrease), burning warmer or cooler depending on the position of the valve SET POINT. If the bulb is cooler than it was at the SET POINT, the bulb senses the cooler temperature and opens the valve further so more heat is applied to the drying air. If the bulb is warmer than it was at the SET POINT, the valve closes further and reduces the temperature until the air is at the valve SET POINT. 3. It is important that the pressure regulator be set high enough to allow the modulating valve to deliver enough gas to maintain the plenum temperature necessary. The regulator is normally factory set at 15 psi (propane units). To set the regulator, run the heater and turn the modulat ing valve T-handle in. This gets full line pressure to the burner. Then adjust regulator to read 15 psi (depending on the plenum temperature needed). 4. Turn the fan and heater on. To set the modulating valve, turn the T-handle out (counterclockwise) until loose and wait a few minutes for the plenum temperature to equalize. When the temperature under the bin has equalized, gradually turn T-handle in (clockwise) about 1/2 turn at a time. Wait until temperature under bin has equalized as before. If temperature under bin is less than the desired temperature, continue turning T-handle in, increasing gas flow and waiting for plenum temperature to equalize until the desired temperature is the stable temperature of the ple num. If temperature under bin is the same 10 minutes after you last made any adjustments to the T-handle you can be certain that the temperature under the bin is the SET POINT of the valve. 1 turn of the T-handle equals approximately 7 degrees F of temperature. 5. The valve will now keep the plenum temperature at the set point regardless of ambient conditions as long as humidistat or thermostat do not shut down the heater. A bypass orifice is used to maintain a small flame when outside temperature is near or above the set point of the valve. The bypass insures steady application of heat at minimum gas flow operation. Bypass orifice will only operate correctly if pressure regulator is set correctly. 6. To observe how the modulating valve increases the efficiency of bin drying, check the gas pressure of the unit in the morning and compare to the pressure read mid-afternoon. If the ambient (outside) temperature is significantly greater later in the day (as normal), the gas pres sure will be less. Since less heat is required to maintain the same temperature in the plenum, the modulating valve will have reduced the amount of gas used by the heater. HEATER OPERATION Deluxe Vane Axial Heater BTU's Per Gauge Pressure (PSI) Propane Models (Approximate) High Temperature Diameter Operating Pressure (PSI) 2 4 6 8 10 12 14 16 18 20 18" 416380 588680 720290 832760 930880 1019420 1107800 1174960 1244360 1340080 24" 598250 844730 1036170 1198890 1340080 1464520 1581770 1689460 1787570 1892860 26" 816010 1148640 1409480 1632030 1825860 1995762 2153700 2302070 2436070 2577260 28" 935660 1318540 1617670 1868930 2091480 2309250 2467180 2649050 2792630 2955360 Low Temperature Diameter Operating Pressure (PSI) 2 4 6 8 10 12 14 16 18 20 18" 102900 145970 181870 208190 234510 253660 275200 294340 311090 335020 24-28" 148370 210580 258440 299130 335020 366130 394850 421170 447490 473810 Gauge Pressure (PSI) Required to Maintain Temperature (Approximate) (High Temp Units Only) Fan Model Static Pressure Heat Rise Degrees F 60 80 100 120 140 160 18...
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