Table of Contents
Advertisement
L404F,T,V
PressureTrol
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.
®
Controllers
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.
Application ........................................................................
Features ...........................................................................
Specifications ...................................................................
Ordering Information ........................................................
Installation ........................................................................
Settings and Adjustments .................................................
Checkout ..........................................................................
PRODUCT DATA
Contents
1
1
2
2
4
6
7
71-2429-06
Advertisement
Table of Contents
Related Manuals for Honeywell PressureTrol L404V
Summarization of Contents
FEATURES
L404F Model
Controllers for steam, air, or noncombustible gases, or noncorrosive fluids.
L404T Model
High pressure limits, break circuit on oil pressure rise above setpoint.
L404V Model
Low pressure limits, make circuit on oil pressure rise above setpoint.
APPLICATION
L404F Application
Operating control and limit protection for pressure systems up to 2070 kPa or 300 psi.
L404T,V Application
For oil burner systems for pressures up to 1035 kPa or 150 psi.
SPECIFICATIONS
Models with kPa-psi and Other Pressure Scales
Details models with kPa-psi and other pressure scales, including operating and differential ranges.
Maximum Diaphragm Pressure
Specifies the maximum diaphragm pressure in kPa and psi for various models.
Conversion Table
Provides conversion values between kg/cm², kPa, and psi for operating ranges and differential.
Switch Ratings
Lists ampere ratings for switch states at 120 Vac and 240 Vac.
Pressure Sensing Element
Describes the pressure sensing element, noting brass bellows for higher kPa models.
Maximum Ambient Temperature
States the maximum ambient temperature the controller can withstand.
Adjustment Means
Describes how adjustments are made and scales are marked.
Mounting Means
Details the 1/4 inch NPT connection and surface mounting options.
Dimensions
Refers to Fig. 1 for approximate dimensions in inches and millimeters.
ORDERING INFORMATION
Purchasing and Contact
Instructions for purchasing and contact information for inquiries and support.
INSTALLATION
General Installation Precautions
Emphasizes reading instructions, checking ratings, and installer qualifications.
Pipe Connection Caution
Advises using pipe dope sparingly to avoid clogging the controller's small orifice.
Location and Mounting (L404F)
Guides on locating the L404F, its ambient temperature limits, and steam boiler mounting.
Pressure Gauge Mounting
Describes how to mount the controller beside a pressure gauge using a steam trap and tee.
Remote Mounting
Provides guidelines for remote location considering vibration and piping requirements.
Boiler Mounting
Explains mounting directly to a steam trap at the boiler manufacturer's recommended location.
Location and Mounting (L404T,V)
Guides on locating L404T,V in oil supply lines, considering burner proximity and safety valves.
Mounting (L404T,V)
Details mounting directly on the main pipe using a tee and nipple, advising wrench use.
WIRING
Electrical Shock Hazard Warning
Warns about severe injury, death, or property damage; requires power disconnection.
Wiring Compliance
All wiring must comply with applicable codes and ordinances; includes terminal access.
L404F in Low Voltage Relay Circuit
Illustrates a typical hookup for the L404F controller in a low voltage relay circuit.
SETTINGS AND ADJUSTMENTS
Switch Operation Explanation
Explains how the switch opens/closes on pressure rise/fall and differential action.
Setpoint Adjustment
Instructions on adjusting the pressure setpoint and the differential setting.
CHECKOUT
Controller Testing Procedure
Steps for testing controller operation after installation and adjustment, observing setpoints.
Scaleplate Calibration Check
Checking make/break points against a calibrated gauge; scaleplate adjustment if needed.
Need help?
Do you have a question about the PressureTrol L404V and is the answer not in the manual?
Questions and answers