Assessments - 4, GPA: 4.3
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Facilidade de uso
There may be some circumstances where the use of short lengths of duct may not create sufficient pressure drop to achieve the desired temperature rise. This may also be the case of using the unit without a duct. This insufficient static pressure drop may result in high air flow, with the maximum temperature rise below the desired level, (even after the fan speed has been reduced to the minimum rpm). An accessory AD16, adjustable damper, is available and can be attached to the heater to produce a static load, ranging from .1” to .19” H2O which will act to reduce the amount of air flow. The “Friction Loss” Graph 4 provides the actual test data on the friction loss for the AD-16 damper attachment. The losses are stated as the equivalent length in feet of 20” duct. Friction Loss AD-16 Damper106040200200016001400180022002400Fan RPMEquivalent Duct Length FT3050708090Damper Full ClosedDamper Full Open The SDRA Dragon includes 2 thermostats. The thermostat on the air inlet end of the unit is for the minimum air temperature desired. The thermostat on the discharge end of the heater is for the maximum air temperature desired. The two thermostats are wired in series with the heating element contactor coil. The temperature range of both ther- mostats is 60 - 180°F. ACCESSORIES Rear of Heater Front of Heater Adjustable Damper 1/4-20 Wing nut Provided with AD-16 Duct Adapter Adjustable Damper and Duct Adaptor 3 FAN SPEED ADJUSTMENTS Changing the Pitch Diameter of the Sheaves: 1. Tools required: 5/32” allen wrench, 3/8” nut driver, 9/16” box wrench and a medium size phillips screwdriver. 2. Remove the lower belt cover by removing the (5) sheet metal screws. 3. Remove the rear grille by removing the (4) 1/4” bolts and nuts. 4. Remove the belt cover inside the blower by removing the (4) sheet metal screws. 5. Loosen the (4) bolts, (2) on each side. See Fig. 1. Figure 1 3/8” Bolts 6. Loosen the (2) motor tension lock nuts and the fan belt tension adjusting bolts. See Fig.2 Figure 2 Lock Nuts Fan belt tension adjusting bolts 7. Loosen the set screw on the fan pulley or motor pulley. Fig. 3 shows the construction of the fan pulley, the motor pulley is the same construction. Figure 3 Fan belt tension adjusting bolts 8.Rotate the front half of the pulley clockwise until it bottoms, then rotate counter clockwise until the set screw aligns with the flat in the threaded half of the pulley. The pulley is now in position for adjustment. See Table 1 for the number of turns out. Tip: Leave allen wrench in set screw and use free hand to fold fan blade. Table 1 Fan RPM No. of turns from full closed Fan RPM No. of turns from full closed Motor Pulley Fan Pulley Motor Pulley Fan Pulley 1500 3 1-1/2 1950 1-1/2 3 1600 2-1/2 1-1/2 2000 1-1/2 3-1/2 1650 2 1-1/2 2100 1-1/2 4 1725 1-1/2 1-1/2 2200 1-1/2 4-1/2 1800 1 1-1/2 2300 1 4-1/2 1850 1/2 1-1/2 9. Retighten set screw, use of thread locking compound is recommended. 10. Adjust fan belt tension, see Fig. 2. A 1/2” of belt deflection is recommended. Tighten lock nuts. 11. Tighten the 3/8” bolts, see Fig. 1 12. Rotate fan blade to make sure the fan belt does not rub. 13. Reinstall top belt cover, grille and lower belt cover. Tip: Installing the grille before installing the lower cover makes it easier to access the two lower grille bolts. 4 WIRING DIAGRAMS SDRA 30kW, 480V, 3PH SDRA 48kW, 480V, 3PH SDRA 60kW, 480V, 3PH 5 PARTS LOCATION Element Assembly 30kW Element Assembly 48kW Element Assembly 60kW Front View with Grille Removed (All Sizes) Side View shown with Heater and Control Terminal Box Covers Removed All Sizes 6 MAINTENANCE Replace or repair damaged cords or plugs immediately. Check tightness of all electrical connections prior to energizing Dragon. Blow out ELECTRIC SHOCK HAZARD. Disconnect heater from or vacuum away any dirt or debris that may have accumulated around power supply before servicing and/or inspecting the the control enclosure fan motor or heating elements. heater; failure to do so may result in electrical shock. RENEWAL PARTS IDENTIFICATION Element (11) Element (12) Motor (16) Contactor (20) Transformer (21) Fuse Block (80) Fuse (81) Term. Block (84) Model No. Volts kW Phase Part No. Part No. Part No. Part No. Part No. Part No. Part No. Part No. SDRA-30-43 480 30 3 118-304793-011(3) 118-304793-013(3) 193-121843-232 072-304551-008 315-304252-001 N/A N/A N/A* SDRA-30-93 600 30 3 118-304793-012(3) 118-304793-014(3) 193-121843-233 072-304551-008 315-304252-003 N/A N/A N/A* SDRA-48-43 480 48 3 118-304793-011(3) 118-304793-013(6) 193-121843-232 072-304551-008(2) 315-304252-001 129-025643-001 128-026510-005(3) 303-047468-004 SDRA-48-93 600 48 3 118-304793-012(3) 118-304793-014(6) 193-121843-233 072-304551-008(2) 315-304252-003 129-025643-001 128-026510-005(3) 303-047468-004 SDRA-60-43 480 60 3 118-304793-011(6) 118-304793-013(6) 193-121843-232 072-304551-008(2) 315-304252-001 129-025643-001(2) 128-026510-006(6) 303-047468-004 SDRA-60-93 600 60 3 118-304793-012(6) 118-304793-014(6)...
Este manual também é adequado para os modelos :Sistemas de ventilação - SDRA-RG (758.45 kb)