Instruction/ maintenance manual of the product RZ-NA 441-OMS Thomas & Betts
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Page 1 FOR YOUR SAFETY W ARNING: 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.
Page 2 Maintenance Section This direct-fired makeup air system is designed to require only a minimum amount of maintenance. Some maintenance procedures outlined in this Section require inspection only and some require action. Frequency requirements of each maintenance procedure are listed in the Maintenance Schedule.
Page 3 Inlet Pressur e T ap V alve V alve Regulator Manifold Pressure T ap Gas Supply Pilot Regulator Pilot Solenoid V alve Pilot Pressur e T ap 3. Manifold Gas Pressure Semiannually , check the gas pressure to the burner and to the pilot. Measure both manifold pressure and pilot supply pressure w ith the blower in operation.
Page 4 4. Air Pressure Profile plate sensing tubes should be checked quarterly and cleaned no less than semiannually . If the sensing tubes become even partially blocked, false pressure readings may be relayed. T o clean, remove the screened end caps.
Page 5 Operation/Service Section Controls - Location, Operation, and Service T o service this system, it is necessary to understand the normal operation of the controls and the function of the diagnostic circuit board. Refer to the electrical box drawing in Figure 7 and to the individual illustrations to identify and locate each of the controls.
Page 6 10. Ignition System Location: Ignition Controller Module in the Control Compartment Electrical Box (See Figures 7 and 13.); Ignitor and Flame Sensor on the Burner (See Figure 14.
Page 7 For troubleshooting guides and further explanation of Maxitrol Series 14 and 44 electronic modulation gas control systems, refer to the Maxitrol literature in the owner's envelope. The Option AG30, AG31, AG32 and AG35 electronic modulation systems are comprised of Maxitrol Series 14 controls.
Page 8 12. Outside Air Cutoff Control (Option BN2; required on C.G.A.-certified units) Location: The control is in the electrical box (See Figure 7.); the sensor is in the air inlet. Function: After sensing pilot flame, the burner ignites at its lowest input rate.
Page 9 13. Door Switch (Option BX1; required on C.G.A.-certified units) Location: The control is installed on an over- head door opening to control the operation of the heater to coincide with the opening and clos- ing of the door .
Page 10 15. Dirty Filter Switch Location: Switch is located in the main electrical box (See Figure 7); sensor tubes run to either side of the filter rack; indicator light is on the remote console.
Page 11 19. T roubleshooting Chart 1 - General T roubleshooting Guide (Check the diagnostic lights on the circuit board) Sym p tom or P r ob l e m C au s e an d R e m e d y 1. Disconnec t s wit ch i s cl osed, but " control p ow e r" lig ht is not l it .
Page 12 Index .................................................. Page Air Pressure ............................................. 4 Air Pressure Switches ............................... 6 Blower Bearings ....................................... 3 Circuit Indicator Board .
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If you already are a holder of Thomas & Betts RZ-NA 441-OMS, but have not read the manual yet, you should do it for the reasons described above. You will learn then if you properly used the available features, and whether you have not made any mistakes, which can shorten the lifetime Thomas & Betts RZ-NA 441-OMS.
However, one of the most important roles played by the user manual is to help in solving problems with Thomas & Betts RZ-NA 441-OMS. Almost always you will find there Troubleshooting, which are the most frequently occurring failures and malfunctions of the device Thomas & Betts RZ-NA 441-OMS along with tips on how to solve them. Even if you fail to solve the problem, the manual will show you a further procedure – contact to the customer service center or the nearest service center
