Thomas & Betts RZ-NA 441-OMS Manuals

Page 1 FOR YOUR SAFETY WARNING: The use and storage of gasoline or other flammable vapors and liquids in the vicinity of this appliance is hazardous. If you smell gas: 1. Open windows. 2. Don't touch electrical switches. 3. Extinguish any open flame. 4. Immediately call your gas supplier. WARNING: Improper installation, adjustment, alteration, service, or maintenance can cause property damage, injury or death. Read the installation, operation, and maintenance instructions thoroughly before installing or servicing this equipment. Operating/Maintenance/Service Instructions The information in this manual applies to Model Series DV, di- rect-fired heating/makeup air systems. As with any gas burning equipment, regular maintenance procedures are required to en- sure continued safety, reliability and efficiency of the installa- tion. If service is required, this system should be serviced only by a qualified service person. Service information in this booklet is intended as a guideline for a qualified gas-fired equipment ser- vice person. Page MAINTENANCE SECTION ...................... 2-4 Configuration ................................. 2 Maintenance Schedule ................... 2 1A. Blower Bearings .............................. 3 1B. Blower Belts ................................... 3 2. Filters ................................................. 3 3. Manifold Gas Pressure ...................... 3 4. Air Pressure ....................................... 4 5. Circuit Indicator Board (check lights) 4 6. Main Burner and Pilot Assembly ...... 4 OPERATION/SERVICE SECTION ................... 5-15 Controls - Location ....................... 5 7. Electronic Circuit Board with Diagnostic Lights.............................. 5 TABLE OF CONTENTS KEEP THIS BOOKLET FOR MAINTENANCE AND SERVICE REFERENCE. References: Installation Manual, Form RZ 441 Replacement Parts Manual, Form RZ 741 Mfg No. 161442 Applies to: Model Series DV INDOOR OR OUTDOOR, GAS, DIRECT-FIRED, MAKEUP AIR/ HEATING SYSTEMS (Specifications subject to change without notice.) Operation/Maintenance/Service Form RZ-NA 441-OMS Page 8. Temperature Limit Safety Controls ... 5 •Manual Reset Limit Control ........... 5 •Emergency Cut Off Limit Control .. 6 9. Air Pressure Switches ........................ 6 •Low Air Flow Switch ...................... 6 •High Air Flow Switch ...................... 6 •Bypass Damper (Optional) Air Flow Switches ................................ 6 10. Ignition System................................ 6 11. Gas Train Including Direct-Fired Burner, Gas Control Systems, Manifold Arrangements and Gas Pressure Switches ............................. 7 •Direct-Fired Burner ........................ 7 •Makeup Air Gas Control Systems .. 7 •Electronic Modulation Gas Control Options AG30, AG31, AG32, AG33, AG35, AG36 ...................... 7 •Electronic Modulation Gas Control Option AG37 ................................. 7 Page •Manifold Arrangements ................. 8 •Gas Pressure Switches.................... 8 12. Outside Air Ambient Cutoff ............ 8 13. Door Switch..................................... 9 14. Inlet Air Controls ............................ 9 •Air Flow Dampers ........................... 9 •Damper Motor ................................. 9 •Potentiometer .................................. 9 •Pressure Null Switch ....................... 9 •Photohelic Pressure Switch ........... 10 15. Dirty Filter Switch ......................... 10 16. Photoelectric Smoke Detector ....... 10 17. Firestat ........................................... 10 18. Freezestat ....................................... 10 19. Troubleshooting ............................. 11 Chart 1 - General Troubleshooting Guide (Check the diagnostic lights on the circuit board) Index ................................................... 12