Honeywell L91B - Manual
Honeywell L91B – Manual, read for free online in PDF format. We hope this helps you resolve any issues you may have. If you have further questions, please contact us through the contact form.
Table of Contents:
- Page 2 – ORDERING INFORMATION
- Page 5 – INSTALLATION; WARNING; Location and Mounting; Mounting Beside a Pressure Gauge
- Page 6 – WIRING; Setting
- Page 7 – Typical Operation
- Page 8 – CHECKOUT; CAUTION
- Page 9 – SERVICE INFORMATION; Calibration
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
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Summary
L91A,B,D PROPORTIONING PRESSURETROL ® CONTROLLERS 60-2152—08 2 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, n...
L91A,B,D PROPORTIONING PRESSURETROL ® CONTROLLERS 5 60-2152—08 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 product to make ...
L91A,B,D PROPORTIONING PRESSURETROL ® CONTROLLERS 60-2152—08 6 Fig. 3. L91 terminal blocks and internal schematics. WIRING 1. Disconnect power supply before beginning installation to prevent electric shock and equipment damage. All wiring must comply with applicable electrical codes, ordinances, and...
