Leslie Controls Temperature Fixed User Manual
12501 Telecom Drive, Tampa Florida 33637
Installation, Operating and
Maintenance Instructions
Supplement
20/5.5.1
Rev. 1
TEMPERATURE
Fixed and Adjustable Proportional Band Types
TABLE OF CONTENTS
INTRODUCTION........................................................................................................................................2
INSTALLATION.........................................................................................................................................3
OPERATION ...............................................................................................................................................3
WIDENING PROPORTIONAL BAND – RTP, DTP,
MAINTENANCE.........................................................................................................................................6
DISMANTLING.......................................................................................................................................6
CLEANING..............................................................................................................................................6
REASSEMBLY........................................................................................................................................6
HOW TO SET LEVER CLEARANCE..................................................................................................7
LEVER CLEARANCE ADJUSTMENT ...............................................................................................7
For Reverse Acting Types – R, RT, RTP, etc.
For Direct Acting Types – D, DT, DTP, etc.
ADJUSTING PROPORTIONAL BAND MECHANISM ....................................................................8
PARTS LIST ..............................................................................................................................................10
............................................................................................7
..............................................................................................7
ETC
...................................................................6
LIST OF ILLUSTRATIONS
F
IGURE 1 - TEMPERATURE PILOT INSTALLATION DETAILS
F
IGURE 2 - TYPICAL INSTALLATION ON STORAGE HEATER
F
IGURE 3 - TYPE
F
IGURE 4 - TEMPERATURE CONTROL SYSTEM UNSING TEMPERATURE PILOT AS AIR TEMPERATURE PILOT AS
AIR T
F
IGURE 5 - TEMPERATURE PILOT CONTROLLING ON INSTANTANEOUS HEATER IN CONJUNCTION WITH A
D
IFFERENTIAL PRESSURE PILOT
F
IGURE 6 - TYPE R AND D SECTIONALS
F
IGURE 7 - BODY ASSEMBLY
F
IGURE 8 - LOCATION OF MINIMUM BAND SETTING
F
IGURE 9 - LOCATION OF MAXIMUM BAND SETTING
F
IGURE 10 - ADJUSTABLE PROPORTIONAL BAND TYPE
F
IGURE 11 - ADJUSTABLE PROPORTIONAL BAND TYPE
RTP T
EMPERATURE TRANSMITTER
EMPERATURE PILOT WITH CLASS
..............................................................................................................4
RTP - DTP T
.........................................................................................................4
..........................................................................................................5
YPES
.............................................................................................7
..............................................................................3
.............................................................................3
GPK C
.......................................................................................8
......................................................................................8
DTP..........................................................................9
RTP ..........................................................................9
ONTROL VALVE
..........................................3
INTRODUCTION
This Installation, Operation, and Maintenance Manual is
intended to be as complete and up to date as possible. It
covers installation, operation, and maintenance procedures
for Leslie Controls, Inc. Temperature Fixed and Adjustable
Proportional Band Types. Leslie reserves right to update
this manual and other product information concerning
installation, operation, and/or maintenance, at any time and
without obligation to notify product owners of such
changes.
Leslie is not responsible for injury to personnel or product
damage due to improper installation, operation, and/or
maintenance Leslie Controls, Inc. Temperature Fixed and
Adjustable Proportional Band Types. All installation,
operation, and maintenance procedures should only be
performed by trained/certified personnel. All personnel
performing these procedures should completely and
carefully read and understand all supplied materials before
attempting procedures. All personnel should pay strict
attention to all Notes, Cautions, and Warnings that appear
within procedures detailed in this manual.
Leslie welcomes user input as to suggestions for product or
manual improvement.
Contact Information
For information concerning warranties, or for questions
pertaining to installation,
Operation or maintenance of LESLIE products, contact:
LESLIE CONTROLS INC.
12501 Telecom Drive
Tampa, FL 33637
USA Phone: (813) 978-1000
USA Fax: (813) 978-0984
www.LESLIECONTROLS.com
To order replacement parts, contact LESLIE CONTROLS
at address listed above, or call toll free:
USA/Canada/Caribbean Phone: (800) 323-8366
Note: Please include model and serial number of unit for
which parts are being ordered. If ordering by phone, please
have this information readily available.
GENERAL NOTES AND WARNINGS
Notes:
• If questions are not answered by this manual, or if
specific installation, operation, and/or maintenance procedures are not clearly
understood, contact Leslie Controls, Inc. for
clarification before proceeding.
• If unit is damaged during installation, operation,
or maintenance, complete following steps:
1. Turn off and lock out pneumatic supply to unit in
an approved manner.
2. Turn off all incoming valves.
3. Contact in-house maintenance personnel or Leslie
Controls, Inc. for instructions.
Note: Throughout this manual, warnings will be
denoted by BOXES
Piping system must be adequately designed and
supported to prevent extraordinary loads to pressure
It is strongly recommended that this document be reviewed
before attempting any installation, operation, or
maintenance procedures.
CAUTION!
equipment.
2
Classes and Types
(Letter “P” in Class Indicates
Adjustable Proportional Band Type)
REVERSE ACTING
R-2, RQ-2, RTP-2, RTHP-2 D-2, DQ-2, DTP-2, DTHP-2
DIRECT ACTING
INSTALLATION
Typical installations Figures 1 through 5. Follow sketch
applicable to equipment in use. Temperature Pilot may be
installed in any position. See note regarding liquid
operating mediums.
1. Control valve piping in figures are schematic. Consult
control valve instructions for proper piping details.
2. Location of Thermal Tube – Locate thermal bulb a
minimum of 6” from nearest heating or cooling coil.
DO NOT place in direct path of heating or cooling
fluids in injection systems. Full length of thermal tube
must be in contact with heated fluid at a point where
true changes in temperature will be felt immediately.
See Figure 5 for shell and tube heaters
(Instantaneous).
3. Thermometer – Position thermometer in immediate
area of thermal tube indication of signal temperature.
4. Location of Temperature Pilot – Temperature Pilot
may be installed as far as 50’ from the control valve.
However, in heat exchanger applications control valve
should be close enough to the heater to prevent
existence of an excessive reservoir of heating fluid
between valve and heater which will pass through
heater, after valve closure, causing override.
5. Liquid Operating Mediums – Elevation between
temperature pilot and control valve should not exceed
10’ when liquid is used as operating medium.
NOTE: New type covers have two directional arrows both
of which indicate “WARMER”. However, the LEFT side of
cover is marked “D-TYPES” and the right side is marked
“R-TYPES”. To INCREASE controlled temperature
setting, turn the knob to the left (counter-clockwise) for
“D-TYPES” and to the right (clockwise) for “R-TYPES).
OPERATION
NOTE: Start initially with all stop valves closed.
1. Open operating medium supply line. Adjust pressure
reducing valve to supply proper operating pressure to
temperature pilot. See Figure 6 for correct values.
Figure 1 - Temperature Pilot Installation Details
Figure 2 - Typical Installation on Storage Heater
Figure 3 - Type RTP Temperature Pilot with Class
GPK Control Valve - Delivered heating or cooling
agent pressure limited by restricting loading pressure
value
3
Figure 4 - Temperature Control
System using Temperature Pilot as
Air Temperature Transmitter.
NOTE: Satisfactory where pressure
limiting is not required.
VALVE TYPE
Diaphragm
Control Valves
Internal Pilot
Piston Operated
Valves (Class
LTY, LTPY,
etc.)
Fluid loaded
diaphragm
operated valves
(Class GPK,
etc.)
VALVE
ACTION
Air-to-Open
Air-to-Close
Air-to-Open Between 8 & 10 psi
Air-to-Open Opening pressure
Figure 5 - Temperature Pilot controlling on Instantaneous Heater in
conjunction with a Differential Pressure Pilot. Acts as Pressure Limiting
Device. Provides anticipating action - 1:1 ratio, air/steam.
NOTE: Place thermal bulb as close to heater outlet as possible but not in
heater unless it is designed for that purpose.
STARTS TO
TRAVEL AT
3 psig 15 psig or other
on diaphragm
depends on pressure
drop and valve size.
See chart Figure 7,
Instruction RVI
7a/12a.
FULL TRAVEL AT: REMARKS
Maximum air pressure
determined by pressure
drop.
At air loading pressure
required for controlled
pressure plus opening
pressure. Flow depends
on system demand.
Air at loading pressure
required for controlled
pressure plus opening
pressure.
In control Valves required air pressure
values may vary with pressure drop
variations.
Valve produces approximately 7 psig
delivered controlled pressure per 1
psig additional loading pressure
supplied after opening force is applied.
Max. loading pressure 35 psig.
Valve produces 1 psig delivered
controlled pressure per 1 psig loading
pressure supplied after opening force
is applied.
4
Figure 4 - Type R and D Sectionals
5
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