Honeywell C645A-E Bedienungsanleitung PDF herunterladen

PRODUCT DATA

C645A-E

Pressure Switches

FEATURES

• C645A,B models are for use on natural gas, LP gas,

or air.

• C645B1047 includes a scaleplate stop to meet

American Gas Association (AGA) requirements for

gas-fired boilers with inputs over 2-1/2 million Btuh.

• C645C,D models are for use on air only.

• C645E for use with distillate fuel oil.

• Spring-loaded diaphragm actuates snap-acting

Micro Switch.

• Switch can be wired to turn on alarm.

• C645A,C and D models break control circuit on

pressure fall.

• C645B models break control circuit on pressure rise.

• Lockout and manual reset optional in A and C models.

• Removable, zinc-plated cover protects scaleplate and

adjusting screw.

• Lockout models have external manual reset lever.

• Pipe tappings allow selection of positive pressure,

differential-pressure, or venting connections.

• Optional switch position indicator available.

• Models of C645A,B available with cover window for

setpoint visibility.

• Buna-N fiber-reinforced material for increased control

diaphragm strength.

• Two seal-off diaphragms for added reliability.

60-2159-8

C645A,B with Window

GENERAL

The C645 pressure switches are safety devices used in

positive-pressure or differential-pressure systems to sense

gas or air pressure changes.

C645A,B,D,E

C645C

Contents

General ............................................................................... 1

Features .............................................................................. 1

Specifications ...................................................................... 2

Ordering Information ........................................................... 2

Installation ........................................................................... 4

Settings and Adjustments ................................................... 6

Operation and Checkout ..................................................... 7

1 2 3 4 5 6 7 8

Inhaltsverzeichnis

Seite 1 - Pressure Switches

Seite 2 - ORDERING INFORMATION

60-2159—82C645A-E PRESSURE SWITCHESSPECIFICATIONSModels:C645A,C,D Pressure Switches—break a circuit whenpressure falls to scale setting minus the diff

Seite 3 - C645A-E PRESSURE SWITCHES

60-2159—83C645A-E PRESSURE SWITCHESSwitching:Spdt Micro Switch snap-acting switch (Fig. 3).Minimum Ambient Temperature:-20°F (- 29°C).Maximum Ambient

Seite 4 - INSTALLATION

60-2159—84C645A-E PRESSURE SWITCHES5(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

Seite 5

60-2159—85C645A-E PRESSURE SWITCHESThe C645E1002 Distillate Fuel Oil Pressure Switch is thesame as the C645A1006 Gas Pressure Switch except that itdoe

Seite 6 - SETTINGS AND ADJUSTMENTS

60-2159—86C645A-E PRESSURE SWITCHESSETTINGS AND ADJUSTMENTSPressure Setpoint AdjustmentTables 2 through 4 give the pressure and switching for eachsetp

Seite 7 - OPERATION AND CHECKOUT

60-2159—87C645A-E PRESSURE SWITCHESThe C645B spring-loaded diaphragm actuates the MicroSwitch snap-acting switch which breaks a control circuit, locks

Seite 8

60-2159—88C645A-E PRESSURE SWITCHESHome and Building ControlHoneywell Inc.1985 Douglas Drive NorthGolden Valley, Minnesota 55422Home and Building Cont