Honeywell C645A-E manual

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Table of contents for the manual

  • Page 1

    Copyright © 1995 Honeywell Inc. • All Rights Reserved PRODUCT D A T A C645A-E Pressure Switches FEA TURES • C645A,B models are f or use on natural gas, LP gas, or air . • C645B1047 includes a scaleplate stop to meet American Gas Association (A GA) requirements for gas-fired boilers with inputs o ver 2-1/2 million Btuh. • C645C,D models are[...]

  • Page 2

    60-2159—8 2 C645A-E PRESSURE SWITCHES SPECIFICA TIONS Models: C645A,C,D Pressure Switches — break a circuit when pressure falls to scale setting minus the differential. Refer to T able 1. ORDERING INFORMA TION When purchasing replacement and modernization products from your TRADELINE ® wholesaler or your distributor , refer to the TRADELINE ®[...]

  • Page 3

    60-2159 — 8 3 C645A-E PRESSURE SWITCHES Switching: Spdt Micro Switch snap-acting switch (Fig. 3). Minimum Ambient T emperature: -20 ° F (- 29 ° C). Maximum Ambient T emperature: 125 ° F (52 ° C). Connections: 1/4-18 NPT female tapping for main or high pressure connection. 1/8-27 NPT female tapping for venting or low-pressure connection. Appro[...]

  • Page 4

    60-2159 — 8 4 C645A-E PRESSURE SWITCHES 5 (127) 3-5/8 (92) 1-13/16 (46) 5/16 (7.9) 1 (25.4) 3/4 (19) 2-1/4 (57.1) 2-3/4 (69.8) 1-1/4 (31.7) 2-5/8 (66.7) 3/4 (19) 3 (76.2) 3-7/8 (98.4) 7-7/8 DIA. (200) 9/32 (7.1) DIA. (2) 3/16 (4.8) DIA. 1/8-27 INCH NPT MANUAL RESET LEVER 1 1 IMPORTANT: FOR MODELS WITH LOCKOUT, DO NOT OBSTRUCT MANUAL RESET LEVER. [...]

  • Page 5

    60-2159 — 8 5 C645A-E PRESSURE SWITCHES The C645E1002 Distillate Fuel Oil Pressure Switch is the same as the C645A1006 Gas Pressure Switch except that it does not have a 0.015 in. (0.38 mm) diameter (nominal) orifice in its 1/4 in. NPT main (high pressure) connection. (This orifice is required in a C645A Gas Pressure Switch to restrict gas leakag[...]

  • Page 6

    60-2159 — 8 6 C645A-E PRESSURE SWITCHES SETTINGS AND ADJUSTMENTS Pressure Setpoint Adjustment T ables 2 through 4 give the pressure and switching for each setpoint. T o adjust the pressure setting, turn the setpoint adjustment screw (Fig. 3 and 4) clockwise to increase the pressure setting and counterclockwise to decrease the pressure setting. T [...]

  • Page 7

    60-2159 — 8 7 C645A-E PRESSURE SWITCHES The C645B spring-loaded diaphragm actuates the Micro Switch snap-acting switch which breaks a control circuit, locks out, and turns on an alarm (if so wired) when the pressure rises to the scale setting. When pressure falls to the scale setting minus the differential, the switch lockout can be manually rese[...]

  • Page 8

    60-2159 — 8 8 C645A-E PRESSURE SWITCHES Home and Building Control Honeywell Inc. 1985 Douglas Drive North Golden Valley, Minnesota 55422 Home and Building Control Honeywell Limited-Honeywell Limitée 35 Dynamic Drive Scarborough, Ontario M1V 4Z9 60-2159 — 8 F .P . Rev . 5-95 www .honeywell.com/bbc[...]