Instruction/ maintenance manual of the product L8104D Honeywell
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1 68-0063—3 J. H. • Rev. 6-95 • ©Honeywell Inc. 1995 L8104A,B,C,D Electr onic W ater Heater Contr ollers The L8104A,B,C,D Electronic Controllers pro- vide temperature control and ECO limit action for gas water heaters.
68-0063—3 2 L8104A,B,C,D SPECIFICATIONS • ORDERING INFORMATION Specif ications IMPORTANT: The specifications given in this publication do not include normal manufacturing tolerances. Therefore, this unit may not exactly match the listed specifications.
3 68-0063—3 L8104A,B,C,D SPECIFICATIONS DIMENSIONS: L8104: Fig. 1. L8104A,B: Fig. 2. L8104C,D: Fig. 3. APPROVALS: Underwriters Laboratories Inc. Component Recognized: File No. MP466, Guide No. MBPR2. American Gas Association Certified: Report No. 70-22A.
68-0063—3 4 L8104A,B,C,D SPECIFICATIONS ACCESSORIES: L8104A: 4074ENP Potentiometer Assembly: 199075A Poten- tiometer: Clockwise turn increases temperature, two 18 in. [46 cm] leadwires with 1/4 in. quick connects. Washer and nut. 4074ENS Potentiometer Assembly: 199053A Potenti- ometer: Counterclockwise turn increases tempera- ture, two 18 in.
5 68-0063—3 L8104A,B,C,D INSTALLATION Installation WHEN INSTALLING THIS PRODUCT… 1. Read these instructions carefully. Failure to follow them could damage the product or cause a hazardous condition. 2. Check the ratings given in the instructions and on the product to make sure the product is suitable for your application.
68-0063—3 6 L8104A,B,C,D INSTALLATION Fig. 5—L8104A with board-mounted potentiometer in a standing pilot application. M131C POWER SUPPLY. PROVIDE DISCONNECT MEANS AND OVERLOAD PROTECTION AS REQUIRED. 1/4 IN. TAB TERMINALS (3). 3/16 IN. TAB TERMINALS (3).
7 68-0063—3 L8104A,B,C,D INSTALLATION Fig. 7—L8104B with remote potentiometer in a standing pilot application. Fig. 8—L8104B with board-mounted potentiometer in an electronic ignition application. M130C POWER SUPPLY. PROVIDE DISCONNECT MEANS AND OVERLOAD PROTECTION AS REQUIRED.
68-0063—3 8 L8104A,B,C,D INSTALLATION Fig. 9—L8104C with remote-mounted potentiometer in an electronic ignition application. SENSING BULB WITH ECO SWITCH 1 2 3 SETPOINT POTENTIOMETER (SHOWN FROM BACK) L1 (HOT) L2 1 4 3 1 2 4 5 3 POWER SUPPLY. PROVIDE DISCONNECT MEANS AND OVERLOAD PROTECTION AS REQUIRED.
9 68-0063—3 L8104A,B,C,D INSTALLATION Fig. 10—L8104D with remote-mounted potentiometer in an electronic ignition application SENSING BULB WITH ECO SWITCH 1 2 3 SETPOINT POTENTIOMETER (SHOWN FROM BACK) L1 (HOT) L2 1 4 3 1 2 4 5 3 POWER SUPPLY. PROVIDE DISCONNECT MEANS AND OVERLOAD PROTECTION AS REQUIRED.
68-0063—3 10 L8104A,B,C,D SETTING AND CHECKOUT Setting and Check out SET CONTROL TEMPERATURE If the potentiometer is mounted on the control module, turn the selector knob to the desired temperature. If the potentiometer is remotely mounted, the position of the flat part of the shaft determines the approximate control temperature.
11 68-0063—3 L8104A,B,C,D SETTING AND CHECKOUT • OPERATION TABLE 2—THERMISTOR RESISTANCE AT VARIOUS TEMPERATURES IN CELSIUS. Operation L8104A,D When the temperature at the sensing bulb drops below the setting on the potentiometer, the relay contacts in the electronic control module make to open the gas control or turn on the ignition module.
68-0063—3 12 L8104A,B,C,D TROUBLESHOOTING DISCONNECT SENSOR LEADS FROM ELECTRONIC CONTROL MODULE AND MEASURE RESISTANCE OF SENSOR(S) WITH OHMMETER. IS RESISTANCE BETWEEN 700K AND 30K OHMS (SEE TABLE 1)? SENSOR(S) OK. DISCONNECT ECO LEADS AND MEASURE RESISTANCE WITH OHMMETER.
13 68-0063—3 L8104A,B,C,D TROUBLESHOOTING CHECK TRANSFORMER, 120V SUPPLY, CORRECT AS NECESSARY. IGNITION MODULE WAS IN LOCKOUT. OBSERVE FOR 2-3 CYCLES TO MAKE SURE SYSTEM IS OTHERWISE OK. SENSOR(S) MAY BE SHORTED OR OPEN. CHECK FOR LOOSE, BROKEN OR SHORTED WIRES.
68-0063—3 14 L8104A,B,C,D TROUBLESHOOTING CHECK TRANSFORMER, 120V SUPPLY, CORRECT AS NECESSARY. IGNITION MODULE WAS IN LOCKOUT. OBSERVE FOR 2-3 CYCLES TO MAKE SURE SYSTEM IS OTHERWISE OK. NO YES CHECK VOLTAGE AT 24V TERMINALS OF ELECTRONIC CONTROL MODULE.
15 68-0063—3 L8104A,B,C,D MATERIAL SAFETY DATA SHEET.
68-0063—3 16 L8104A,B,C,D MATERIAL SAFETY DATA SHEET.
17 68-0063—3 L8104A,B,C,D MATERIAL SAFETY DATA SHEET.
68-0063—3 18 L8104A,B,C,D MATERIAL SAFETY DATA SHEET.
19 68-0063—3 L8104A,B,C,D MATERIAL SAFETY DATA SHEET.
68-0063—3 20 L8104A,B,C,D MATERIAL SAFETY DATA SHEET Home and Building Control Home and Building Control Helping You Control Your World Honeywell Inc. Honeywell Limited—Honeywell Limitée 1985 Douglas Drive North 740 Ellesmere Road Golden Valley, MN 55422 Scarborough, Ontario M1P 2V9 Printed in U.
An important point after buying a device Honeywell L8104D (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 L8104D 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 L8104D - thus you can check whether the hardware meets your expectations. When delving into next pages of the user manual, Honeywell L8104D you will learn all the available features of the product, as well as information on its operation. The information that you get Honeywell L8104D will certainly help you make a decision on the purchase.
If you already are a holder of Honeywell L8104D, 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 L8104D.
However, one of the most important roles played by the user manual is to help in solving problems with Honeywell L8104D. Almost always you will find there Troubleshooting, which are the most frequently occurring failures and malfunctions of the device Honeywell L8104D 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
