Instruction/ maintenance manual of the product C645A-E Honeywell
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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.
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.
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.
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.
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.
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.
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.
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 .
An important point after buying a device Honeywell C645A-E (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 C645A-E 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 C645A-E - thus you can check whether the hardware meets your expectations. When delving into next pages of the user manual, Honeywell C645A-E you will learn all the available features of the product, as well as information on its operation. The information that you get Honeywell C645A-E will certainly help you make a decision on the purchase.
If you already are a holder of Honeywell C645A-E, 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 C645A-E.
However, one of the most important roles played by the user manual is to help in solving problems with Honeywell C645A-E. Almost always you will find there Troubleshooting, which are the most frequently occurring failures and malfunctions of the device Honeywell C645A-E 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
