Honeywell Boiler L91D Manual do Utilizador descarregar pdf

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 2

Installation 5

Wiring 6

Checkout 8

Service Information 9

1 2 3 4 5 6 ... 11 12

Resumo do Conteúdo

Página 1 - Controllers

PRODUCT DATAPut UPC Code Here60-2152—08L91A,B,D ProportioningPressuretrol® ControllersAPPLICATIONL91 Proportioning Pressuretrol® Controllers are Serie

Página 2 - SPECIFICATIONS

L91A,B,D PROPORTIONING PRESSURETROL® CONTROLLERS60-2152—08 10Fig. 8. Removing terminal block bracket.Fig. 9. Replacing potentiometer in L91.Fig. 10. R

Página 3 - 3 60-2152—08

L91A,B,D PROPORTIONING PRESSURETROL® CONTROLLERS11 60-2152—08

Página 4 - Controllers, in in. (mm)

L91A,B,D PROPORTIONING PRESSURETROL® CONTROLLERSAutomation and Control SolutionsHoneywell International Inc.1985 Douglas Drive NorthGolden Valley, MN

Página 5 - INSTALLATION

L91A,B,D PROPORTIONING PRESSURETROL® CONTROLLERS60-2152—08 2ORDERING INFORMATIONWhen purchasing replacement and modernization products from your TRADE

Página 6 - Limit Controllers

L91A,B,D PROPORTIONING PRESSURETROL® CONTROLLERS3 60-2152—08Electrical Connections: Internal screw terminals. Hole inside of case for 1/2 in. conduit.

Página 7 - Typical Operation

L91A,B,D PROPORTIONING PRESSURETROL® CONTROLLERS60-2152—08 4Fig. 1. Mounting dimensions of the L91 Proportional Pressuretrol® Controllers, in in. (mm)

Página 8 - CHECKOUT

L91A,B,D PROPORTIONING PRESSURETROL® CONTROLLERS5 60-2152—08INSTALLATIONWhen Installing This Product...1. Read these instructions carefully. Failure t

Página 9 - SERVICE INFORMATION

L91A,B,D PROPORTIONING PRESSURETROL® CONTROLLERS60-2152—08 6Fig. 3. L91 terminal blocks and internal schematics.WIRING1. Disconnect power supply befor

Página 10 - CONTROLLERS

L91A,B,D PROPORTIONING PRESSURETROL® CONTROLLERS7 60-2152—08point). The L91B settings provide system modulation between 70 and 75 psi or between 75 an

Página 11

L91A,B,D PROPORTIONING PRESSURETROL® CONTROLLERS60-2152—08 8CHECKOUTAfter the controller is installed, wired, and set, it should be tested with the sy

Página 12 - Printed in U.S.A

L91A,B,D PROPORTIONING PRESSURETROL® CONTROLLERS9 60-2152—08SERVICE INFORMATIONCAUTIONElectrical Shock Hazard1. Only qualified service technicians sho