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Honeywell C437F - page 1
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. • Pressure ranges: 1/2 to 5-1/2 in. of water (10 to 140 mm of water , or 0.1 to 1.4 kP a); ...
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Honeywell C437F - page 2
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. Order number . 2. Pressure range ...
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Honeywell C437F - page 3
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 . b Restrictive orifice in inlet pressure channel to compensate for momentary surges in ...
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Honeywell C437F - page 4
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. If this control is replacing a control that contains mercury in a ...
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Honeywell C437F - page 5
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. 2. Accurately level the pressure switch for proper operation. 3. The C63 ...
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Honeywell C437F - page 6
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. Do not use this device for differential pressure contr ...
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Honeywell C437F - page 7
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. 2) and release it. The pressure switch will not be reset ...
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Honeywell C437F - page 8
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. Honeywell Limited—Honeywell Limitée 1985 Douglas Drive North 35 Dynamic Drive Golden Valley, MN 55422 Scarborough, Ontario M1V 4Z9 ...
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