Honeywell C437EC437, C637B, C437F, C437G, C437D User Manual

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Honeywell C437EC437, C637B, C437F, C437G, C437D User Manual

C437D,E,F,G,H,J,K and C637B Gas

Pressure Switches

PRODUCT DATA

FEATURES

GENERAL

The C437 and C637 Gas Pressure Switches are pressureactuated switching devices used in industrial gas system applications for safety shutoff, pressure control, and differential-pressure control.

C437 models have directand reverse-acting (spst) switching; C637B has single-pole, double-throw (spdt) switching.

Pressure ranges: 1/2 to 5-1/2 in. of water (10 to 140 mm of water, or 0.1 to 1.4 kPa); 1 to 26 in. of water (50 to 700 mm of water, or 0.5 to 7 kPa); 1/2 to 5 psi (300 to 3500 mm of water, or 3 to 35 kPa); 1 to 10 psi (500 to 7000 mm of water, or 5 to 70 kPa).

Models intended for lockout applications must be manually reset before resuming operation.

Trip-free mechanism on manual reset models ensures that the limit function of the switch cannot be defeated by jamming the reset lever.

External manual reset button on side of lockout models.

Enclosed setting impedes tampering and provides dust-resistant operation.

Buna-N fiber-reinforced material for increased strength of control diaphragm.

Two Buna-N fiber-reinforced seal-off diaphragms for added reliability.

Clear glass cover allows observation of interior mechanism to aid setting and checkout.

Mercury switch provides visual indication of switch position.

Heavy die-cast case increases durability and resistance to corrosion.

Main control diaphragm completely enclosed a leakproof chamber can be vented to a safe area.

Models with a pressure range of 1 to 26 in. of water (50 to 700 mm of water, or 0.5 to 7 kPa) have a restrictive orifice in the inlet pressure channel to compensate for momentary surges in gas pressure.

Field-addable orifices of various sizes are available.

Models available with rainproof, dustproof, sleetand ice-resistant enclosure; meets NEMA 3R specification.

 

Contents

General ...............................................................................

1

Features ..............................................................................

1

Specifications ......................................................................

2

Ordering Information ...........................................................

2

Recycling Notice .................................................................

4

Installation ...........................................................................

4

Setting and Checkout ..........................................................

6

Copyright © 1995 Honeywell Inc. • All Rights Reserved

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

60-2320-9

C437D,E,F,G,H,J,K AND C637B GAS PRESSURE SWITCHES

SPECIFICATIONS

Models:

 

 

 

 

Model

Switch Action

Manual Reseta

 

Number

(Response at Setpoint to Pressure Change)

(Locks Out on Switch Break)

 

 

 

 

 

C437D

spst, breaks on rise

yes

 

 

 

 

 

C437E

spst, breaks on fall

yes

 

 

 

 

 

C437Fb

2 spst circuitsc, breaks one, makes one

no

 

C437Ga

spst, breaks on rise

no

 

C437Ha

spst, breaks on fall

no

 

C437J

2 spst circuitsc, breaks one, makes one

yes (lockout on rise)

 

C437K

2 spst circuitsc, breaks one, makes one

yes (lockout on fall)

 

C637B

spst, breaks R-W and makes R-B on fall

no

 

 

 

 

 

aDesignated Manual Reset 2; the trip-free reset mechanism does not permit the switch to function as an automatic-reset device when the manual reset lever is held in the Reset position.

b Weatherproof enclosure (NEMA 3R) available.

c Two separate switches are contained in the same mercury bulb.

Switch Ratings (In Amperes):

 

 

 

 

 

 

 

 

 

 

C437E,G and H

 

 

C437F,J,K

 

 

 

 

 

 

 

 

 

 

Voltage

Full Load

Locked Rotor

Resistive Load

Full Load

Locked Rotor

Resistive Load

 

 

 

 

 

 

 

 

 

120 Vac

8.0

48.0

10.0

8.0

48.0

10.0

 

 

 

 

 

 

 

 

 

240 Vac

5.1

30.6

5.0

5.1

30.6

5.0

 

 

 

 

 

 

 

 

 

120 Vdc

2.4

24.0

5.0

2.0

20.0

8.0

 

 

 

 

 

 

 

 

 

240 Vdc

1.2

12.0

2.0

1.0

10.0

3.0

 

 

 

 

 

 

 

 

 

C637B—62.5 VA at 120 and 240 Vac, pilot duty.

ORDERING INFORMATION

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.

3.Replacement parts, if desired.

4.Accessories, if desired.

If you have additional questions, need further information, or would like to comment on our products or services, please write or phone:

1.Your local Honeywell Home and Building Control Division Sales Office (check white pages of phone directory).

2.Home and Building Control Division Customer Logistics Honeywell Inc., 1985 Douglas Drive North Minneapolis, Minnesota 55422-4386

In Canada—Honeywell Limited/Honeywell Limitée, 35 Dynamic Drive, Scarborough, Ontario M1V 4Z9. International Sales and Service offices in all principal cities of the world. Manufacturing in Australia, Canada, Finland, France, Germany, Japan, Mexico, Netherlands, Spain, Taiwan, United Kingdom, U.S.A.

60-2320—9

2

C437D,E,F,G,H,J,K AND C637B GAS PRESSURE SWITCHES

Switch:

Mercury switch (C437F,J and K have two spst switches in one mercury bulb).

Differentials:

Fixed, nominal; measured at pressure indicated:

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Pressure Rangea

 

 

 

 

 

 

 

1/2 to 5-1/2 in.

1 to 26 in.b

 

1/2 to 5 psi

 

1 to 10 psi

 

 

 

(10-140 mm, or

(50-700 mm, or

(300-3500 mm, or

(500-7000 mm,

 

 

 

0.1-1.4 kPa)

0.5-7 kPa)

3-35 kPa) differential

or 5-70 kPa)

 

 

 

Differential Measured

differential

measurement at

differential

 

 

Model

 

at 1/2 in.

 

measured at 15 in.

 

midscale

 

measurement

 

 

Numbers

in.

mm

kPa

in.

mm

kPa

psi

 

mm

 

kPa

psi

mm

kPa

Typea

 

C437D,J

1-3/4

44.5

0.44

1/2

 

352

 

3.45

1c

703c

6.89c

Subtractived

 

C437E,F,H,K

0.25e

6.4e

0.06e

1-1/4

31.8

0.31

1/4

 

176

 

1.72

1/2e

352e

3.45e

Additivef

 

C637B

0.15

3.8

0.04

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

C437G

1-1/4

31.8

0.31

1/4

 

176

 

1.72

1/2

352

3.45

Subtractive

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

a in. = inches of water; mm = millimeters of water.

b Restrictive orifice in inlet pressure channel to compensate for momentary surges in gas pressure. c Not available for C437J.

d Subtractive models: switching action occurs on pressure rise to the setpoint. e Not available for C437K.

f Additive models: switching action occurs on pressure fall to the setpoint.

Pressure Ranges (Scale Range):

Specify one:

1/2 to 5-1/2 inches of water (10 to 140 mm of water, or

0.1 to 1.4 kPa).

1 to 26 inches of water (50 to 700 mm of water, or 0.5 to 7 kPa).

1/2 to 5 lb per sq in. (300 to 3500 mm of water, or 3 to

35kPa).

1 to 10 lb per sq in. (500 to 7000 mm of water, or 5 to

70kPa).

Maximum Sustained Operating Pressure:

 

 

 

 

 

Maximum Pressure

 

 

 

 

 

Pressure Range

psi

kPa

 

 

 

 

 

1/2 to 5-1/2 in. of water

3.0

20.7

 

 

 

 

 

1 to 26 in. of water

5.0

34.5

 

 

 

 

 

1/2 to 5 psi

15.0

103.4

 

 

 

 

 

1 to 10 psi

30.0

206.8

 

 

 

 

 

Pipe Connections:

Main or High Pressure: 1/2 in. NPT, female. Vent or Low Pressure: 1/8 in. NPT, female. Electrical Wiring: Hole tapped for 1/2 in. conduit.

Maximum Ambient Temperature:

125°F (52°C).

Minimum Temperature:

32°F (0°C).

Approvals:

Underwriters Laboratories Inc. Listed: File No. MP2168,

Guide No. MFHX.

Canadian Standards Association Certified: File No. 1620,

Guide No. 380-W-1.16.

Factory Mutual Approved: Report No. 13031-S5 and

19291.

Replacement Parts:

106729 Cover Glass, 6 in. (152.4 mm) diameter.

139870A Cover Glass, for rainproof enclosures.

106747 Cover Retaining Ring, for models manufactured before 1973.

118733-21 Retaining Clip, for models manufactured since

1975.

Accessories:

4074BWK Bag Assembly: Contains two 137755 Mounting Brackets and four self-tapping screws: for surface mounting (standard on C437G and H). Mounting brackets are shown by dashed lines in Fig. 1.

Field-addable Orifices:

124674: 0.011 in. (0.28 mm) diameter. 122160: 0.018 in. (0.46 mm) diameter.

3

60-2320—9

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