Instruction/ maintenance manual of the product C637B Honeywell
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PRODUCT DA T A Copyright © 1995 Honeywell Inc. • All Rights Reserved C437D,E,F ,G,H,J,K and C637B Gas Pressure Switches FEA TURES • C437 models have direct- and re verse-acting (spst) s witching; C637B has single-pole, doub le-thr ow (spdt) s witching.
C437D,E,F ,G,H,J,K AND C637B GAS PRESSURE SWITCHES 60-2320—9 2 SPECIFICA TIONS Models: ORDERING INFORMA TION When purchasing replacement and modernization products from your TRADELINE® wholesaler or your distributor , refer to the TRADELINE® Catalog or price sheets for complete ordering number , or specify— 1.
C437D,E,F ,G,H,J,K AND C637B GAS PRESSURE SWITCHES 60-2320—9 3 Switch: Mercury switch (C437F ,J and K have two spst switches in one mercury bulb). Differentials: Fixed, nominal; measured at pressure indicated: a in. = inches of water; mm = millimeters of water .
C437D,E,F ,G,H,J,K AND C637B GAS PRESSURE SWITCHES 60-2320—9 4 Fig. 1. Installation dimensions of the C437 and C637 gas pressure switches, in in. (mm). RECYCLING NO TICE This control contains mercury in a sealed tube. Do not place control in the trash at the end of its useful life.
C437D,E,F ,G,H,J,K AND C637B GAS PRESSURE SWITCHES 60-2320—9 5 CA UTION Disconnect all power to the pressure switch before beginning installation to prevent electrical shock and equipment damage. IMPORT ANT 1. Remove the dust-seal label from the vent tapping before mounting.
C437D,E,F ,G,H,J,K AND C637B GAS PRESSURE SWITCHES 60-2320—9 6 (1) Connect the high-pressure side of the system to the 1/2 in. NPT main pressure tapping on the gas pressure switch. (2) Connect the low pressure side to the 1/8 in. NPT vent tapping. W ARNING No venting is possible in this case.
C437D,E,F ,G,H,J,K AND C637B GAS PRESSURE SWITCHES 60-2320—9 7 To reset one of these pressure switches, wait until the pressure falls to the setpoint minus the differential (C437D or J), or rises to the setpoint plus the differential (C437E or K). Then depress the manual reset button (Fig.
C437D,E,F ,G,H,J,K AND C637B GAS PRESSURE SWITCHES 60-2320—9 8 60-2320—9 L.Z. Rev . 9-95 customer .honeywell.com Automation and Control Solutions Honeywell International Inc.
An important point after buying a device Honeywell C637B (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 C637B 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 C637B - thus you can check whether the hardware meets your expectations. When delving into next pages of the user manual, Honeywell C637B you will learn all the available features of the product, as well as information on its operation. The information that you get Honeywell C637B will certainly help you make a decision on the purchase.
If you already are a holder of Honeywell C637B, 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 C637B.
However, one of the most important roles played by the user manual is to help in solving problems with Honeywell C637B. Almost always you will find there Troubleshooting, which are the most frequently occurring failures and malfunctions of the device Honeywell C637B 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
