Справочник Пользователя для Honeywell L91D

PRODUCT DATA

Put UPC Code Here

60-2152—08

L91A,B,D Proportioning
Pressuretrol

Controllers

APPLICATION

L91 Proportioning Pressuretrol

Controllers are Series 90

Modulating Pressure Controllers that provide direct control of

modulating motors or valves used on automatic burners or

steam heating systems.

FEATURES

• Models available for pressure systems up to 300 psi

(2068 kPa).

• May be used with steam, air, noncombustible gases, or

other fluids noncorrosive to brass or phos-bronze (300

psi model) bellows.

• When used with steam boilers, a steam trap (siphon

loop) is recommended.

• Wiper on controller potentiometer moves in response

to pressure changes.

• L91D has two potentiometers for unison control of two

motors.

• L91B,D models have adjustable proportioning

(throttling) range to allow selection of desired

pressure control range.

• Adjustments made with screws on case top.
• Large, easily-read scaleplates in both U.S. customary

(oz/sq. in., psi, or in. Hg) and metric (kPa, MPa, or mm

Hg) units.

• Steel case with clear plastic cover to observe pressure

settings and potentiometer action.

• Fitting with 1/4 -18 NPT threads allows rapid

installation.

• Surface mount with screws through knockout holes in

case back.

Contents

Application 1

Features 1

Specifications

Installation 5

Wiring 6

Checkout

Service Information