Honeywell L404F - Manual

This Installation Manual covers Honeywell’s L404F, T, and V PressureTrol® controllers, designed for pressure regulation in oil burner systems up to 150 psi. The document highlights key operational features like adjustable differentials and snap-switch functionality while detailing installation procedures–including mounting configurations, wiring diagrams, and safety precautions–for both direct pipe and remote applications. Technical specifications such as pressure ranges, diaphragm ratings, and mounting dimensions are also provided alongside troubleshooting guidance for system integration.

Page 1 – Product Overview and Applications
Page 2 – Specifications and Ordering Information
Page 3 – Technical Specifications and Dimensions
Page 4 – Installation Procedures
Page 5 – Oil Burner System Wiring and Installation
Page 6 – Wiring, Terminal Configuration, and Adjustments
Page 7 – Calibration and Checkout Testing
Page 8 – Product Identification and Copyright

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PRODUCT DATA

71-2429-06

L404F,T,V
PressureTrol

Controllers

APPLICATION

L404F PressureTrol

Controllers provide operating control

with automatic limit protection for pressure systems of up to

2070 kPa, or 300 psi.

L404T,V PressureTrol

Controllers are for use on oil burner

systems for pressures up to 1035 kPa or 150 psi.

FEATURES

• Models available in a series of control ranges, and

pressure scales in kPa and psi.

• All models automatically reset and have an adjustable

differential.

• Models have snap switch to open or close a circuit on

a pressure rise.

• Case has a clear plastic cover so setpoints can be

observed.

• 1/4 inch—18 NPT connection for pipe on diaphragm

assembly.

• Ground screw terminal.
L404F:

• Controllers may be used with steam, air, or

noncombustible gases, or fluids noncorrosive to the

pressure sensing element.

L404T:

• High pressure limits, break a circuit on oil pressure

rise above setpoint.

L404V:

• Low pressure limits, makes a circuit on oil pressure

rise above setpoint.

Contents

Application ........................................................................

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

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

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

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

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

Checkout ..........................................................................

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About this manual

Brand: Honeywell
Model: L404F
Document type: Manual
Language(s): English
Pages: 8
File size: 799.9 KB
Format: PDF

Summary

Page 1 - Product Overview and Applications

Details on L404F, T, V PressureTrol® Controllers, including features like adjustable differential, snap switch functionality, and applications for general pressure control up to 300 psi and oil burner systems up to 150 psi.

Page 2 - Specifications and Ordering Information

Listing of model numbers, operating pressure ranges in kPa and psi, subtractive differential settings, maximum diaphragm ratings, and ordering guidance with contact information for sales offices.

Page 3 - Technical Specifications and Dimensions

Conversion tables for pressure units, switch ratings, details on pressure sensing elements, mounting requirements, dimensions, and technical drawings showing component locations.