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Manual Honeywell L91B

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  • Honeywell L91B - page 1

    PRODUCT DAT A Put UPC Code Here 60-2152—08 L91A,B,D Proportioning Pressuretrol ® Controllers APPLICATION L91 Proportioning Pressure trol ® Controllers are Series 90 Modulating Pressure Controllers that provide direct control of modulating motors or valves used on automatic burners or steam heating systems. FEATURES • Models available for pres ...

  • Honeywell L91B - page 2

    L91A,B,D PROPORTIONING PRESSURETROL ® CONTROLLERS 60-2152—0 8 2 ORDERING INFORMATION When purchasing replacement and modernizat io n products from your TRADELINE® whol esaler or distributor , refer to the TRADELINE® Catalog or price sheets for complete ordering number . If you have additional questions, need further information, or w oul d lik ...

  • Honeywell L91B - page 3

    L91A,B,D PROPORTIONING PRESSURETROL ® CONTROLLERS 3 60-2152—0 8 Electrical C onnections: Internal screw terminals. Hole inside of case for 1/2 in. conduit. Dimensions: See Fig. 1; see Fig. 2 for mounting steam trap (siphon loop). Weight: 1 lb, 15 oz (0.88 kg). Finish: Gray . Replacement Parts: 129178 Thermoplastic C over . 23176CB Potentiometer: ...

  • Honeywell L91B - page 4

    L91A,B,D PROPORTIONING PRESSURETROL ® CONTROLLERS 60-2152—0 8 4 Fig. 1. Moun ting dimensions o f the L91 Propo rtional Pressure trol ® Controllers, in in . (mm). M29781 L91A,B,D ALL OTHER MODELS 10 TO 300 PSI 0 TO 15 PSI 0 TO 16 OZ/IN 2 1/4-18 NPT DIM A (SEE T ABULA TION T ABLE) DIM B (SEE T ABULA TION T ABLE) DIM C (SEE T ABULA TION T ABLE) 1 ...

  • Honeywell L91B - page 5

    L91A,B,D PROPORTIONING PRESSURETROL ® CONTROLLERS 5 60-2152—0 8 INSTALLATION When Inst alling This Product... 1. Read these instructions carefully . Failure to follow them could damage the product o r cause a hazardo us condition. 2. Check the ratings given in the instructions and on the product to make sure the product is suitable for your appl ...

  • Honeywell L91B - page 6

    L91A,B,D PROPORTIONING PRESSURETROL ® CONTROLLERS 60-2152—0 8 6 Fig. 3. L91 termina l blocks and internal schema tics. WIR IN G 1. Disconnect power supply before beginning installation to prevent electric shock and equipment damage. All wiring must comply with applicable electric al codes, ordinances, and regula tions. Use NEC Class 1 (lin e vol ...

  • Honeywell L91B - page 7

    L91A,B,D PROPORTIONING PRESSURETROL ® CONTROLLERS 7 60-2152—0 8 point). The L91B settings pr ovide system modula tion between 70 and 75 psi or between 75 and 80 psi, depending on the exact setting of the L91 B main scale setpoint. Due to device tolerances, the scaleplate settings a re approximate and, therefore, the settings should be fine-tuned ...

  • Honeywell L91B - page 8

    L91A,B,D PROPORTIONING PRESSURETROL ® CONTROLLERS 60-2152—0 8 8 CHECKOUT After the controller is installed, wired, and set, it should be tested with the system in operation. First, allow th e system to stabilize. Then, observe the oper ation of the controlle r while raising and lowering its setpoint. Pressure should increase when the setpoint is ...

  • Honeywell L91B - page 9

    L91A,B,D PROPORTIONING PRESSURETROL ® CONTROLLERS 9 60-2152—0 8 SERVICE INFORMATION CAUTION Electrical Shock Hazard 1. Only qualified servi ce technicians should a ttempt to service or repair flame safeguard controls and burner systems. 2. Disconnect power su pply before cleaning the potentiometer wi ndings or wiper, or before replacing the cont ...

  • Honeywell L91B - page 10

    L91A,B,D PROPORTIONING PRESSURETROL ® CONTROLLERS 60-2152—0 8 10 Fig. 8. Removing ter minal block bracket. Fig. 9. Replaci ng potentiomet er in L91. Fig. 10. Replacing terminal block brack et. DIFF . MAIN MIN B D F E C A 0 4 6 2 1 3 4 5 16 14 12 10 8 0 kPa OZS IN 2 DIFF . IS ADDITIVE 2 6 7 M8521A REMOVE BRACKET SCREW FROM TOP OF CASE TERMINAL BL ...

  • Honeywell L91B - page 11

    L91A,B,D PROPORTIONING PRESSURETROL ® CONTROLLERS 11 60-2152—0 8 ...

  • Honeywell L91B - page 12

    L91A,B,D PROPORTIONING PRESSURETROL ® CONTROLLERS Automation and Control Solutions Honeywell Internationa l Inc. 1985 Douglas Drive North Golden Valley, MN 55422 Honeywell Limited-Honeywell Limitée 35 Dynamic Dr ive Toronto, Ontario M1V 4Z9 customer.honeywell.com ® U.S. Registered T rademark © 2009 Honeywell Internationa l Inc. 60-2152-—08 K. ...

Manufacturer Honeywell Category Boiler

Documents that we receive from a manufacturer of a Honeywell L91B can be divided into several groups. They are, among others:
- Honeywell technical drawings
- L91B manuals
- Honeywell product data sheets
- information booklets
- or energy labels Honeywell L91B
All of them are important, but the most important information from the point of view of use of the device are in the user manual Honeywell L91B.

A group of documents referred to as user manuals is also divided into more specific types, such as: Installation manuals Honeywell L91B, service manual, brief instructions and user manuals Honeywell L91B. Depending on your needs, you should look for the document you need. In our website you can view the most popular manual of the product Honeywell L91B.

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A complete manual for the device Honeywell L91B, how should it look like?
A manual, also referred to as a user manual, or simply "instructions" is a technical document designed to assist in the use Honeywell L91B by users. Manuals are usually written by a technical writer, but in a language understandable to all users of Honeywell L91B.

A complete Honeywell manual, should contain several basic components. Some of them are less important, such as: cover / title page or copyright page. However, the remaining part should provide us with information that is important from the point of view of the user.

1. Preface and tips on how to use the manual Honeywell L91B - At the beginning of each manual we should find clues about how to use the guidelines. It should include information about the location of the Contents of the Honeywell L91B, FAQ or common problems, i.e. places that are most often searched by users in each manual
2. Contents - index of all tips concerning the Honeywell L91B, that we can find in the current document
3. Tips how to use the basic functions of the device Honeywell L91B - which should help us in our first steps of using Honeywell L91B
4. Troubleshooting - systematic sequence of activities that will help us diagnose and subsequently solve the most important problems with Honeywell L91B
5. FAQ - Frequently Asked Questions
6. Contact detailsInformation about where to look for contact to the manufacturer/service of Honeywell L91B in a specific country, if it was not possible to solve the problem on our own.

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