TEMPERATURE and TIME CONTROL
Tel: 1-866-829-4253
info@keracontrols.com
Tel: 1-866-829-4253
info@keracontrols.com
Model series DSDP-4PB
With 2 external temperature sensors
Models for 120Vac, 208-250Vac,
12V and 24V AC/DC
Output load : up to 60 Amp / 250Vac.
Optional Remote Control + Display Panel
Temperature range: -40F (-40C ) to 255F ( 124C )
Higher ranges available up to 960F ( 515C )
Differential range: 0 to 99 F ( 55 C )
Programmable Sequence of operation
8 push-buttons:
1. CONTROL ON/OFF
2. STEP ( display scroll )
3. SETTING DOWN
4. SETTING UP
5. MENU ( settings )
6. AUX1 ( relay 1 control )
7. AUX2 ( relay 2 control )
8. AUX3 ( relay 3 and 4 control )
Installation example
in 3-gang wiring box
Metal Face
Dim's: 6.5" x 4.5" x 0.3"
165mm x 115mm x 8mm
Black or Custom
labels available
APPLICATION Examples:
Great energy savings can be achieved when using the DSDP-4PB temperature difference controller.
The control is set to mainain a preset difference ( differential ) between the outside and inside temperatures. Either uni-directional or bi-directional fan can be used.
For instance; air from outside is automatically pumped IN or air from inside is pumped OUT in order to keep the inside within a certain range, as compared to the outside temperature.
The programmable Upper and Lower temperature limits make sure that the inside is never too hot or too cold.
This automatic control prevents the humidity condensation and thereby any buld up of mold or fungus is avoided.
Significant cost losses can occur when metals stored in warehouses are exposed to moisture condensation caused by inflow of warm air into cold storage environment.
By using the DSDP-4PB temperature difference thermostat it is possible to maintain the inside tmperature slightly higher than ouside and at a much lower cost than by simply heating up the warehouse.
The control will mainain a preset difference ( differential ) between the outside and inside temperatures, regardless of what the absolute temperatures are.
This way the costs of heating are greatly reduced, no matter what climate or time of the year it is.
The programmable Upper and Lower temperature limits make sure that the inside is never too hot or too cold.
It is important to keep tight control of the climate in storage of vegetables or greenhouses. Sudden and unpredictable changes in humidity and weather can result in catastrophic losses of produce.
DSDP-4PB can keep the temparature of air and/or water at optimal levels with low heating or cooling costs. This is achieved by coordinating the heating, ventilation, fan and valve control with the actual temperature difference between the inside and outside air, as well as the absolute temperature.
This type of control can result in dramatic energy savings and costs reduction.
The programmable sequence of operation and Upper, and Lower temperature limits keep the climate in check.
Easy and reliable way to prevent electrical equipment damage caused by humidity condensation.
DSDP-4PB temperature difference controller can keep the equipment temperature at a slightly higher level than the surrounding air, thereby preventing the moisture condensation.
The controller will switch the heater on or off, depending upon the difference in temperatures, regardless of what the absolute temperatures are.
The programmable Upper and Lower temperature limits make sure that the inside is never too hot or too cold.
Wine cellars often contain very valuable stocks of expensive vintage that may need to be stored over long periods of time. Maintaining the correct temperature and humidity therefore becomes very important.
DSDP-4PB Differential Thermostat can be installed to control ventilation, heating and cooling, if necessary.
By implementing automatic control of the climate, based on the temperature difference between inside and outside, the long term storage costs can be significantly improved.
The programmable sequence of operation and Upper, and Lower temperature limits can keep the wine safe from temperature extremes.
DSDP-4PB Programmable Differential Thermostat is capable of controlling simple, as well as most expanded solar heating systems.
Programmable sequence of operation, programmable temperature difference range and programmable limits like Overheat, High Limit, Low Limit and Freeze Protection, assure efficient solar heat recovery.
Up to three temperature sensors and four powerful on-board relays can be used to satisfy variety of configurations. High power switching capabilities allow for direct control of Pumps, Valves and Heaters.
DSDP-4PB Differential Thermostat can accept variety of temperature sensor probes that can be wired up to 500 ft ( 150 m ) away, using any standard inexpensive cable.
This maintenace free, self calibrating controller allows for reliable, 100% duty, automatic operation without supervision.
Programmable Upper and Lower temperature limits can keep the system safe from temperature extremes like overhating or freezing, as well as provides low temperature, low efficiency system protection.
Example of available models
Wiring extendable
up to 500 ft ( 150M)
Optional Plate-Guard
for standard sensor probes.
Plastic model PPP-4
and SS model PPS-4
Optional Plastic Guard
for standard sensor probes.
Model PG-5
Basic DSD-4PB wiring
for loads up to 2 x 30 Amps
Extended DSD-4PB wiring with contactor
for very high loads
Extended DSD-4PB wiring
for loads up to 60 Amps
and with extra relays for light, fan or other
Simple DSD-4PB wiring
for loads up to 2 x 30 Amps
like A/C and Heater
DSD-4PB Difference Thermostat Specifications
DSDP-4PB is a digital Temperature Difference Controller ( differential thermostat ) designed for applications based on a difference of temperatures rather than an absolute temperature level. However, it is capable of controlling absolute temperature levels as well.
The controller has an internal, accurate, programmable thermostat processor, that is self-calibrating and does not require any maintenance or adjustments.
The internal, programmable sequence processor allows the user to schedule a specific order of events, as necessary for the application.
Standard models have two on-board, high power relays with contacts rated for up to 30Amp, 250Vac load max. each.
Optionally an internal alarm buzzer or up to two additional on-board relays can be ordered for special applications to control loads of up to 10Amp, 250Vac max. each.
The high power and the optional relays' contacts can be wired up to control Heaters, Chillers, HVAC and other loads like a Fan, Motor, Valve, Solenoid, Pump, etc...
All relays' contacts can be wired up as completely isolated from the controller's supply, so the supply voltage can be different than the voltages on the loads.
In order to switch very high loads, the relays' contacts can be wired up to control the coils of external contactors.
An additional, dry contact input can be ordered for external ON/OFF control switch or other applications, like for instance a water level sensor switch.
Also, an additional, low voltage output can be ordered for max. load of up to 30mA, 5Vdc, for instance to connect to an external LED indicator lamp.
The controller is operated and the set points are preset by pressing the corresponding keys
on the control panel face. All preset values are stored in internal memory.
A variety of the controller's operating features, configurations, temperature ranges and limits are also programmable via the face plate keys.
The 6-digit LED display shows the current temperature readings, the preset values, the status of the relays and other indications of operation. The LED display can be ordered in RED, GREEN or BLUE color.
Another option is an external Remote Control and Display Panel ( DSDPR-4PB ) that can be connected to the main panel via a 4- or 2-conductor cable up to 500 ft ( 150M ) away.
Note, that the DSD-4PB controllers are designed to eliminate almost completely the EMF ( Electro Magnetic Field ) radiation.