AEC TDH-6 Series Specification sheet

TDH-6 Series
Large Hot Oil
Temperature Control Units
Operation and Installation Manual
Important! Read Carefully Before Attempting to Install or Operate Equipment
Part No. 682.91539.00 Bulletin No. AE1-650.1

Page 2 TDH-6 Series Hot Oil Large Temperature Control Units
Write down your unit serial number(s) ________________ ________________
here for future reference ________________ ________________
________________ ________________
________________ ________________
AEC, Inc is committed to a continuing program of product improvement.
Specifications, appearance, and dimensions described in this manual
are subject to change without notice.
© Copyright AEC, Inc. 2023
All rights reserved. Effective 6/26/2023
Part No. 682.91539.00 Bulletin No. AE1-650.1

TDH-6 Series Hot Oil Large Temperature Control Units Page 3
Safety Considerations
AEC’s TDH-6 Series large hot oil temperature control units are
designed to provide safe and reliable operation when installed and
operated within design specifications, following national and local
safety codes.
To avoid possible personnel injury or equipment damage when
installing, operating, or maintaining this equipment, use good
judgment and follow these safe practices:
Follow all SAFETY CODES.
Wear SAFETY GLASSES and WORK GLOVES.
Disconnect and/or lock out power before servicing or
maintaining the hot oil temperature control unit.
Use care when LOADING, UNLOADING, RIGGING, or
MOVING this equipment.
Operate this equipment within design specifications.
OPEN, TAG, and LOCK ALL DISCONNECTS before
working on equipment. You should remove the fuses and carry
them with you.
Make sure the hot oil temperature control unit and components
are properly GROUNDED before you switch on power.
Do not jump or bypass any electrical safety control.
Do not restore power until you remove all tools, test
equipment, etc., and the hot oil temperature control unit and
related equipment are fully reassembled.
Only PROPERLY TRAINED personnel familiar with the
information in this manual should work on this equipment.

Page 4 TDH-6 Series Hot Oil Large Temperature Control Units
Table of Contents
1 General Information.................................................7
1-1 Introduction .....................................................................................7
1-2 Necessary Documents....................................................................7
1-3 Models Covered..............................................................................8
1-4 Standard Features ..........................................................................8
1-5 Available Options............................................................................9
1-6 Feature Descriptions.......................................................................9
2 Shipping Information.............................................17
2-1 Unpacking and Inspection............................................................. 17
2-2 In the Event of Shipping Damages................................................ 17
2-3 If the Shipment is Not Complete.................................................... 18
2-4 If the Shipment is Not Correct....................................................... 18
2-5 Returns ......................................................................................... 18
3 Installation ..............................................................19
3-1 Work Rules ................................................................................... 19
3-2 Installation Requirements.............................................................. 19
3-3 Connecting Piping......................................................................... 20
3-4 Making Electrical Connections...................................................... 26

TDH-6 Series Hot Oil Large Temperature Control Units Page 5
Table of Contents
4 Startup Preparations..............................................29
4-1 Starting the Unit ............................................................................29
4-2 Shutting Down the Unit ................................................................. 32
4-3 Returning Fluid to the Tank........................................................... 32
5 Using Controls and Indicators..............................34
5-1 The Microprocessor Controller...................................................... 34
5-2 Identifying M2B Controller Panel Components ............................. 35
5-3 Using M2B Controller Keys........................................................... 37
5-4 Identifying Control Panel Switches................................................ 39
5-5 Identifying System Status Board Indicators...................................41
6 Preventive Maintenance ........................................46
6-1 Periodic Checks............................................................................ 46
6-2 Routine Servicing.......................................................................... 47
6-3 Draining the Unit for Storage......................................................... 50
6-4 Corrective Maintenance................................................................ 50
6-5 Maintaining the Pump ...............................................See Addendum
7 Troubleshooting.....................................................52

Page 6 TDH-6 Series Hot Oil Large Temperature Control Units
Charts and Figures
1
TDH-6 Series Hot Oil Large Temperature Control Unit and
Specifications
16
2
TDH-6 Unit Piping Setup
16
3
Typical Flow Schematic
24
4
Typical E5CK Graphic and Button Control Panel
34
5
Control Panel Switches
39
6
System Status Board Indicators
41

TDH-6 Series Hot Oil Large Temperature Control Units Page 7
1 General Information
1-1 Introduction
Your AEC TDH-6 Series hot oil temperature control unit circulates
thermal transfer-type oil through your process and to precisely,
automatically, and reliably maintain it at a temperature you can
select. The operating range of your temperature control unit is
from 100°F to 550°F (38°C to 288°C). The unit is best suited for
use with SterlTherm™Heat Transfer Fluid. A recommended list of
commercially available heat transfer fluids can be obtained through
Sterling Customer Service.
Rapid recirculation of the fluid provides a close and uniform
temperature relationship between the TO PROCESS and FROM
PROCESS lines. This does, of course, depend on the configuration
of your process, and any restrictions within the mold.
This recirculation, combined with the immersion heater and
optional cooling capability, gives fast and accurate response to
bring the fluid up to temperature, or to changes in the settings
when needed.
Performance is assured through matching the unique AEC
controllers to the AEC high temperature system. The two systems
are fully integrated to achieve accurate control.
1-2 Necessary Documents
The following documents are necessary for the safe installation,
operation, and maintenance of your AEC TDH-6 Series hot oil
large temperature control unit. You can obtain additional copies
from AEC, Inc. Make sure that appropriate personnel are familiar
with these documents:
This manual.
The electrical schematic and connection diagram in the control
enclosure.
The manuals for accessories and options you’ve selected.
The customer parts list in the control enclosure.

Page 8 TDH-6 Series Hot Oil Large Temperature Control Units
1-3 Models Covered
This manual lists installation, operation, and maintenance
instructions for the TDH-6 Series hot oil large temperature control
unit.
Model numbers are listed on the serial tag. A model number
followed by -Q indicates a specially constructed unit, and not all
information in this manual may apply. Make sure that you know
the model number, serial number, and operating voltage of your
unit if you contact Sterling, Inc.
1-4 Standard Features
•E5CK, ¼ DIN controller; includes diagnostic features with
indicator and warning status lights
•Non-fused lockable rotary disconnect
•Dual stage immersion heater with IEC contactors
•550°F (288ºC) maximum operating temperature
•Branch fusing
•System status graphic display
•Pressure switch for low pump pressure shut-down
•NEMA 12 electrical enclosure
•UL listed subpanel
•To Process pressure gauge
•Independent safety thermostat
•Y strainer on From Process line
•A packed positive displacement pumps capable of reversing
to evacuate the process
•Easily removable panels for quick access to internal
components
•Audible alarm

TDH-6 Series Hot Oil Large Temperature Control Units Page 9
1-5 Available Options
•Drain valve
•Manual bypass
•Hour meter; measures total pump run time hours
•General fault visual alarm
•Automatic venting sequence
•Low level alarm for reservoir
•E5AK controller options include:
◼4-20 mA remote set point and retransmission
◼SPI protocol, RS-485
◼General protocols, types RS-232, -485
◼Remote sensor
•Heat exchanger options of
•3.9 sq. ft. (0.3627 sq. m)
•6.7 sq. ft. (0.6231 sq. m)
•13 sq. ft. (1.21 sq. m)
•21 sq. ft. (1.96 sq.m)
•27 sq. ft. (2.51 sq. m)
•Remote controller
•Lexan cover
•Mechanical Seal Pump
•Optional operating voltages of 208/3/60, 230/3/60, 575/3/60,
380/3/50, and 415/3/50
•Provisions for a Nitrogen Blanket on the Reservoir can
drastically increase fluid life.
1-6 Feature Descriptions
Immersion Heaters
The fluid is heated by the specially designed three-phase low watt
density electrical immersion heater, and regulated by the
controller. The standard heater has a steel sheath for low watt
density and good heat transfer.
These models can be supplied with 50, 60, 75, 100, 120, 150, and
200 kW low watt density immersion heaters, depending upon the
heating needs of the process. All models are built to provide full or
partial heat as required by the process and determined by the
controller, to provide more precise control.

Page 10 TDH-6 Series Hot Oil Large Temperature Control Units
Heater Tank
The TDH-6 features a single pass heater tank. The tank is designed
to maintain an optimum balance of fluid velocity versus watt
density, and turbulence for excellent heat transfer, and minimal
pressure drop. The high fluid velocity will greatly prolong the life
of the heater and fluid.
Pump
The pump is a packed, positive displacement pump. It features a
nearly failure free design, and has proven itself after years of
dependable service. It is well suited for use with a variety of
commercially available heat transfer fluids. The pump has only
two internal moving parts, and a specially designed seal to give
years of trouble free service, even at high temperatures. The only
routine maintenance required is weekly greasing and occasional
packing and headspace adjustment; see Chapter 6 on Page 47 for
more information.
The pump is capable of running in either direction. Thus, the pump
reverse feature can be used to draw fluids back from the process. It
is not necessary to install a service air line to purge the lines before
changing molds. Since the pump is capable of achieving extremely
high pressures, it is necessary to regulate the pressure through use
of a regulating by-pass line (Fulflo valve). Because the pump is a
positive displacement pump, it will supply the process with rated
flow at or below the rated pressure.
The flow is constant until the pressure reaches the rated pressure.
The pressure however is a function of frictional losses through the
process that it is attached to. Systems with large process
connections, ports, and piping will operate at low pressures. While
systems with small process connections, ports, and piping will
operate at higher pressures. Once the pressure requirements exceed
the rated pressure, the fulflow valve will open and bypass the
necessary fluid to prevent high pressures.
Ful-Flo Valve
A regulating by-pass line featuring a Fulflo valve is standard in all
units. This is a safety device to prevent excessive pressure in the
event that the delivery line is obstructed. Each Fulflo is factory
preset to limit system pressure as specified by the customer. It
must not be tampered with in any way.