Instruction/ maintenance manual of the product L91D Honeywell
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Honeywell L91 PROPORTIONING PRESSURETROLCONTROLLERS L91 PROPORTIONING PRESSURETROL CONTROLLERS ARE SERIES 90 MODULATING PRESSURE CONTROLLERS THAT PROVIDE DIRECT CONTROL OF MODULATING MOTORS OR VALVES USED ON AUTOMATIC BURNERS OR STEAM HEAT- ING SYSTEMS.
PROPcJRTlONlNG RANGE ADJUSTING SCREW (L91B.D.F.ONLY) CONTROLLER POTENTIOMETER(S) MAIN SCALE ADJUSTING IM POTENTIOMETER JUSTING SCREW POTENTIOMETER WIPER ARM(S) PROPORTIONING SCALEPLATE (L91B,D,F ONLY) PROPORTIONING INDICATOR (L91B.D.F ONLY) -BELLOWS HOUSING I MAIN SCALE SETTING INDICATOR n 1 KNURLED ADJUSTMENT KNOB ON IO TO 300 PSI [0.
An important point after buying a device Honeywell L91D (or even before the purchase) is to read its user manual. We should do this for several simple reasons:
If you have not bought Honeywell L91D yet, this is a good time to familiarize yourself with the basic data on the product. First of all view first pages of the manual, you can find above. You should find there the most important technical data Honeywell L91D - thus you can check whether the hardware meets your expectations. When delving into next pages of the user manual, Honeywell L91D you will learn all the available features of the product, as well as information on its operation. The information that you get Honeywell L91D will certainly help you make a decision on the purchase.
If you already are a holder of Honeywell L91D, 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 Honeywell L91D.
However, one of the most important roles played by the user manual is to help in solving problems with Honeywell L91D. Almost always you will find there Troubleshooting, which are the most frequently occurring failures and malfunctions of the device Honeywell L91D 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