Honeywell L408B, L608A, L408A User Manual

APPLICATION

The L408A,B and L608A VaporStat® Controllers are line voltage pressure controllers that provide operating control or automatic limit protection for pressure systems of up to 4 psi (0.28 kg/cm2 or 27.6 kPa).

L408A,B; L608A

VaporStat® Controllers

PRODUCT DATA

FEATURES

• Primarily for use in vapor heating systems, but also may be used with liquids, air, and other noncombustible gases

• Stainless steel diaphragm also allows use with ammonia, oxygen, distilled water, and similar media.

• L408A and B models have an spst switch; L408A breaks and L408B makes when pressure rises to the main scale setpoint.

• L608A models have an spdt switch that breaks R-B when pressure rises to the main scale setpoint.

• Dustproof, trouble-free mercury switch.

• Maximum surge pressure of 15 psi (103.4 kPa).

• All models have an adjustable subtractive differential.

• Adjustments are made by screws on top of case.

• Scaleplates are marked in English (psi) and metric

• Case has clear plastic cover so that pressure settings

• Leveling indicator visible through cover.

• Hexagonal fitting with 1/4-18 NPT internal threads for

• Can also be surface mounted by screws through holes

(kg/cm

and switch action can be observed.

direct mounting to the 14026 Steam Trap (siphon loop), which is included.

(knockouts) in back of case.

) units.

Contents

Application ........................................................................ 1

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

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

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

Installation ........................................................................ 3

Wiring ............................................................................... 5

Setting and Checkout ....................................................... 6

Service Information .......................................................... 7

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L408A,B; L608A VAPORSTAT® CONTROLLERS

SPECIFICATIONS

IMPORTANT

The specifications given in this publication do not include normal manufacturing tolerances. Therefore, this unit may not match the listed specifications exactly. Also, this product is tested and calibrated under closely controlled conditions, and some minor differences in performance can be expected if those conditions are changed.

Models:

L408A,B and L608A VaporStat® Controllers. See Tables 1, 2,

and 3 below. All models include a 14026 Steam Trap (siphon loop), which is necessary for boiler installations.

Table 3. Operating Ranges Available for All Models.

Pressure Ranges Midscale Subtractive Differential (Adjustable)

English Units kg/cm

0 to 16 oz/in.

0 to 4 psi 0 to 0.28 0 to 27.6 4 to 16 0.02 to 0.07 1.7 to 6.9

0 to 16 oz/in.

0 to.0.07 0 to 6.9 2 to 16 0.01 to 0.07 0.9 to 6.9

0 to 0.7 0 to 6.9 3.5 to 16 0.02 to 0.07 1.6 to 6.9

kPa oz/in.

Model Switch Type

L408A Spst Breaks

L408B Spst Makes

L608A Spdt Breaks R-B; makes

Table 2. Switch Contact Ratings (in amperes at 50/60 Hz).

Model Load

L408A,B Full Load 8.0 5.1 2.4 1.2

L608A Full Load 8.0 5.1 2.0 1.0

Table 1. Models Available.

Switch Action on

Pressure Rise

R-W.

120

240

Vac

Locked Rotor 48.0 30.6 24.0 12.0

Noninductive 10.0 5.0 5.0 2.0

Locked Rotor 48.0 30.6 20.0 10.0

Noninductive 10.0 5.0 8.0 4.0

kg/cm

120

Vdc

kPa

240

Vdc

Maximum Surge Pressure:

15 psi (1.05 kg/cm

Switch:

Mercury switch in all models.

Pressure Sensing Element:

Stainless steel diaphragm.

Maximum Ambient Temperature:

150°F (66°C).

or 103.4 kPa).

Minimum Ambient Temperature:

-35°F (-37°C); also refer to note under Location and Mounting in the Installation section.

Adjustment Means:

Screws on top of controller case. Scales are marked in psi

and kg/cm

Electrical Connections:

Internal screw terminals; holes in side of case for 1/2 inch

conduit.

ORDERING INFORMATION

When purchasing replacement and modernization products from your TRADELINE® wholesaler or distributor, refer to the TRADELINE® Catalog or price sheets for complete ordering number.

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 Automation and Control Products Sales Office (check white pages of your phone directory).

2. Honeywell Customer Care

1885 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.

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L408A,B; L608A VAPORSTAT® CONTROLLERS

)

M19770

Mounting Means:

Hexagonal fitting on diaphragm has 1/4-18 NPT internal

threads for mounting on a pipe or steam trap (siphon loop). Also can be surface mounted by screws through two holes (knockouts) in back of case.

Dimensions:

See Fig. 1; also Fig. 2 for mounting steam trap (siphon loop).

Weight:

2 lb, 4 oz. (1.02 kg).

Finish:

Gray.

Approvals:

Underwriters Laboratories Inc. Listed: File No. MP466, Vol.

10; Guide No. MBPR.

Canadian Standards Association Certified: File No. LR1620;

Guide No. 400-E-0.

Replacement Parts:

129178 Thermoplastic Cover.

4-1/2 (114)

COVER

4-11/32 (110)

CASE

1-61/64

(50)

1-5/32

(29)

1-15/16

(49)

14026 Steam Trap (siphon loop)—1/4 inch black iron pipe;

included with all models.

Accessories:

33312B Knurled Adjustment Knob—with setscrew; fits on

main scale pressure adjusting screw.

4074BWJ Limit Stop Assembly—to limit setpoint ranges:

includes 129564 Range Stop, 107194 Range Stop Screw, and 23466 Wrench.

MERCURY NOTICE

If this control is replacing a control that contains mercury in a sealed tube, do not place your old control in the trash. Dispose of properly. This control also contains mercury in a sealed tube. It must also be disposed of properly when it is replaced.

Contact your local waste management authority for instructions regarding recycling and the proper disposal of an old control.

3/16 (9) x 21/64 (8) KNOCKOUT (2)

2-3/4 (70)

1-1/16 (27)

1-13/16

2-1/8 (54) 2-1/4 (57)

1/4 – 18 NPT

Fig. 1. Mounting dimensions of the L408A,B and L608A VaporStat® controllers in inches

(millimeters in parentheses).

INSTALLATION

When Installing This Product…

1. Read these instructions carefully. Failure to follow them

could damage the product or cause a hazardous condition.

2. Check the ratings given in the instructions and on the

(46)

3-7/8

(98)

7/8

(22) DIA.

1-3/16 (30)

product to make sure the product is suitable for your application.

4-1/2 (114)

1-1/16

(27)

2-1/4 (57)

13/16

(21)

3-23/32

(95)

5-1/8 (130

3. Installer must be a trained, experienced service

technician.

4. After installation is complete, check out product

operation as provided in these instructions.

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