Thomas & Betts RZ-NA 441-OMS manuals
Kitchen Appliance > Appliance Trim Kit
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Thomas & Betts RZ-NA 441-OMS Installation Manual
12 pages 1.36 Mb
Operating/Maintenance/Service Instructions KEEP THIS BOOKLET FOR MAINTENANCE AND SERVICE REFERENCE.INDOOR OR OUTDOOR, GAS, DIRECT-FIRED, MAKEUP AIR/ HEATING SYSTEMS 2 Maintenance SectionMaintenance ScheduleS R E 3 3. Manifold Gas Pressure1B. Blower Belts R E 2. Filters 1. Drive Components 1A. Blower Bearings RBearing Bore Diameter (Inches) RPM to 500 6 6 6 501 - 1000 6 6 6 1001 - 1500 5 5 5 1501 - 2000 5 4 5 4 4. Air Pressure 5. Circuit Indicator Board (check lights) 6. Main Burner and Pilot Assembly CAUTION: Wear eye protection while pressure cleaning and drilling. WARNING: Do not enlarge burner ports or performance may be drastically affected. R 5 Operation/Service SectionControls - Location, Operation, and Service 7. Electronic Circuit Board with Diagnostic Lights 8. Temperature Limit Safety Controls Manual Reset Limit Control - Blower Cabinet 6 10. Ignition SystemHot Surface Ignition System with Prepurge Time Delay and Flame Sensor with 100% Lockout Emergency Cut Off Limit Control 9. Air Pressure Switches Low Air Flow Switch High Air Flow Switch 8. Temperature Limit Safety Controls (cont'd) Electronic Modulation Gas Control Option AG37 Direct-Fired Burner Makeup Air Gas Control Systems 7 Options AG30, AG31, AG32, AG33, AG35, AG36 8 12. Outside Air Cutoff Control (Option BN2; required on C.G.A.-certified units)Figure 21 - Outside Air Cutoff Control Figure 19 - Gas Manifold Control Components Solenoid Valve Manifold ArrangementsDescription: Modulating/ Regulating Valve 11. Gas Train Including Direct-Fired Burner, Gas Control Systems, and Manifold Arrangements (cont'd)Pilot Valve Pilot Regulator Gas Pressure SwitchesFigure 20 - Gas Pressure Switches Low, P/N 93850 (automatic) High, P/N 93849 (manual reset) Manifold Pressure Drops ( w.c.) Service - All Maxitrol Controls: 9 13. Door Switch (Option BX1; required on C.G.A.-certified units)Figure 22 - Door Switch, P/N 124253 Description: Air Flow Dampers Damper Motor Potentiometer Pressure Null Switch (automatic building pressure sensor)Description/Function: Figure 23 - Damper Motor Figure 24 - Potentiometer, P/N 16110 Figure 25 - Pressure Null Switch (building pressure sensor), P/N 88052 10 15. Dirty Filter SwitchLocation: Function: Figure 27 - Dirty Filter Pressure Switch, P/N 105507 Service: 16. Photoelectric Smoke Detector (Option SA1) 17. Firestat (Option BD5) 18. Freezestat (Option BE2)Photohelic Pressure Switch (automatic building pressure sensor)Description/Function: Service: 14. Inlet Air Controls (cont'd)Pressure Null Switch (cont'd)Figure 29 - Firestat, P/N 42782 Figure 30 - Freezestat Controller, P/N 126170 Figure 26 - Photohelic Pressure Sensor, P/N 159893 Service: 11 19. TroubleshootingChart 1 - General Troubleshooting Guide (Check the diagnostic lights on the circuit board) Symptom or Problem Cause and Remedy 12 19. Troubleshooting (cont'd)Chart 1 (cont'd) - General Troubleshooting Guide (Check the diagnostic lights) FOR SERVICE OR REPAIR, FOLLOW THESE STEPS IN ORDER:Symptom or Problem (cont'd) Cause and Remedy (cont'd)
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