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Hench Control Corporation has created a
microprocessor based control system that is focused on saving companies money through
energy savings. The control strategies that have been developed are second to none in the
industry. Hench Control System routinely save companies between 15% and 35% on their
energy bills. While the main focus is reducing energy usage, the Hench Control System
allows operators to maintain the highest levels of plant control in an easy to use
software package. The Windows based software allows operators to make system changes by
simply pointing and clicking. The only information that has to be entered is the equipment
type and the control setpoints. The calculations for control are generated from these
setpoints. This eliminates time-consuming site programming and will ensure rapid and easy
startups.
There are separate control
modules for compressors, condensers, evaporators, ice rinks, blast freezers, wine tanks,
air compressors, ladder logic and bottling plants. The basic architecture of each control
module is the same. The control modules are differentiated by a set of EPROM's (Erasable,
Programmable, Read, Only, Memory). Each set of EPROM's has its own control strategy
preprogrammed. The individual Hench Control Modules can be linked together like building
blocks to form a complete control system. New modules can be added at any time and are
interfaced through a single communication wire.
Compressor Controllers
The purpose of the Hench
Compressor Controllers is to maintain refrigeration load requirements while operating the
compressors in the most efficient manner. Hench Control has different control modules for
compressors depending on the individual facility requirements. The determining factor
relates to the number of compressors and the number of stages in the plant.
Energy Incentives: Raising the
suction pressure by 1 psi equals 2% energy savings. Operating compressors efficiently
results in 5% to 15% energy savings.
| 1S10 |
Single Stage, 10
Compressor Controller |
| 1S15 |
Single Stage, 15
Compressor Controller |
| 1S15B |
15 Compressor
Bottling Plant Controller |
| 2S10 |
Two Stage, 10
Compressor Controller |
| 2S15 |
Two Stage, 15
Compressor Controller |
Condenser Controllers
The Hench Condenser Controllers
maintain the discharge pressure as low as possible based on the operator entered
setpoints. The Hench Condenser Controllers can control from either Discharge Pressure or
Temperature Difference. Controlling from Temperature Difference is the most efficient.
| 16C |
16 Step Condenser
Controller (Step=Fan or Pump) |
| 32C |
32 Step Condenser
Controller |
| 16CV |
16 Step Variable
Speed Fan Condenser Controller with Ladder Logic programming for miscellaneous control |
| 16CLL |
16 Step Condenser
Controller with Ladder Logic programming for miscellaneous control |
OMNI
Controllers
The OMNI Controller is a
"combination" controller and control up to 5 compressors on 2 suction stages and
up to 8 steps of condensing on a common discharge. There is Ladder Logic programming for
miscellaneous control. The same energy saving strategies are used in this controller as
they are in the individual controllers.
| OMNI |
2 Stage, 5 Compressor, 8 Steps
of Condensing, 21 Miscellaneous Analog Inputs, 16 Miscellaneous Digital Outputs and 16
Miscellaneous Digital Inputs |
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Evaporator
Controllers
The primary focus is to satisfy
the Zone Temperature (established by a setpoint entered by the operator). The evaporator
controller then works on saving energy by cycling the fans on/off, controlling the defrost
cycles and the length of time that evaporator can stay in defrost mode. The evaporator
controller module reacts with the condenser controller to raise discharge pressure for Hot
Gas Defrosts.
| 1T15 |
15 Zones, single speed fans, 1
Temperature per Evaporator (zone), Air Defrost Evaporator Controller. |
| 2T8 |
8 Zones, single speed fans, 2
Temperatures per Evaporator (zone and liquid/hot gas), Hot Gas Defrost Evaporator
Controller. |
| 2T8V |
8 Zones, Variable Speed Fans, 2
Temperatures per Evaporator (zone and liquid/hot gas), Hot Gas Defrost Evaporator
Controller. |
| 2S2T8 |
8 Zones, 2 Speed Fans, 2
Temperatures per Evaporator (zone and liquid/hot gas), Hot Gas Defrost Evaporator
Controller. |
| 2T16 |
16 Zones, single speed fans,
Satellite Evaporator Controller: Master Controller, 16 Satellite Modules, 2 Temperature
per Evaporator (zone and liquid/hot gas), Hot Gas Defrost Evaporator Controller. The
satellite modules can be daisy chained together using RS485 communications cable or
wireless communications. |
| 3T8 |
8 Zones, single speed fans, 3
Temperatures per Evaporator (zone, liquid/hot gas and air off), Hot Gas Defrost Evaporator
Controller. This controller can control defrost cycles from Temperature Drop across the
coil. |
| 3T8B |
8 Zones, single speed fans, 3
Temperatures per Evaporator (zone, liquid/hot gas and air off), Hot Gas Defrost Evaporator
Controller. This controller can control defrost cycles off of Temperature Drop across the
coil. This controller also has intermittent cooling for Blast Freezer applications. |
Ladder Logic Controllers
The Hench Ladder Logic
Controllers are viewed as "OPEN" controllers. A Hench Control representative or
a facilities onsite operator is responsible for determining what the control points are
and their function. The ladder logic controllers can be used for such things as gas
detection, pump package operation, lighting controls, alarm monitoring and plant guarding.
| LL1632 |
16 Digital Inputs,
32 Digital Outputs and 32 Analog Input Ladder Logic Controller Module |
| LL3216 |
32 Digital Inputs, 16 Digital
Outputs, 32 Analog Input Ladder Logic Controller Module |
| LL1632PID |
16 Digital Inputs, 32 Digital
Outputs, 32 Analog Input,16 Analog Output Ladder Logic Controller Module for controlling
variable speed fans, regulating valves, or other devices which need an analog signal to
control. Can control with voltage (0-5V, 0-10V) or current (4-20mA). |
Air Compressor Controllers
The purpose of the Hench Air
Compressor Controller is to maintain load requirements while operating the air compressors
in the most efficient manner. The Hench Control System will maintain an optimum air
discharge pressure to ensure plant operation and maximize energy efficiencies.
| 2C10 |
Two Stage, 10 Compressor
Controller |
Ice
Rink Controllers
The Hench Control Ice Rink
Controller will maintain a constant ice temperature and reduce engine room equipment use.
The Hench Ice Rink Controller has the ability to have automated ice temperature settings
that can be changed up to 7 times per day, 7 days a week.
| Ice
Rink Engine Room |
5 Compressors, 2
Slab Controls, 7-Day Ice Temperature Scheduler, Ladder Logic, 2 Digital Inputs, 4 Digital
Outputs, 12 Analog Inputs |
| Ice Rink
Facility |
5 Compressors, 5 Slab Controls,
8 Condenser Steps, 7 Day Ice Temperature Scheduler, Ladder Logic, 20 Digital Inputs, 7
Digital Outputs, 16 Analog Input |
Special
Application Controllers
| W32
Wine Tank |
For Temperature
control of up to 32 Wine Tanks |
| W24
Wine Tank |
For Temperature
control of up to 24 Wine Tanks with Heating |
Alarm/
Monitoring |
48 Analog Inputs
for Monitoring and Alarming |
For
more information on any Hench Control products
please
contact our sales department at 1-510-741-8100.
© 2007 Hench Control International
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