COMPUTHERM DPA20-6 Energy Efficient Circulation Pumps Instruction Manual

The DPA low-energy circulation pumps are designed for the circulation of water in one-pipe, two-pipe, radiator-based and underfloor heating systems. The permanent-magnet motor and the modern electronic control of the pump enables the pump to adapt its performance to the current needs of the heating system automatically. Because of this, the energy consumption of these pumps are significantly lower than the consumption of conventional pumps, and they are classified as Energy Efficiency Class A pumps.

DPA pumps can be used for circulating clean, dilute, non- aggressive and non-explosive liquids that do not contain solid particles, fiber or mineral oils. In heating systems the water must comply with the relevant standards requirements for the pump to be usable.

Advantages of the device:

Automatic, self -regulating mode
Energy Saving: Automatic control of different pressure
Comfort: Low noise level
Security features: built -in electrical protection and heat protection
User -friendly: Easy setup and operation

The built -in automatic adaptation function (AUTOADAPT) has been specifically designed for floor heating systems. The automatic adaptation function (factory setting) automatically adapts the pump output to the demand, i.e. the size of the system and the heating demand. The output is gradually adjusted over time. Optimum pump setting cannot be expected from the first day.

Parts of the pump

Suction connector
Pump housing
Pressure connector
Engine cover
Data plate
Venting screw
Control panel

Type designation

20: 1” connection size and 130 mm installation length
25: 1½” connection size and 180 mm installation length

Important warnings and safety recommendations

Before using the device, study carefully the device’s operating instructions and make sure to follow the instructions carefully.
This device is designed for indoor use. Do not use in a wet, chemically aggressive or dusty environment, or in a place where it may be splashed by water, or where the ambient temperature may be below 0 °C or above 40 °C.
The manufacturer is not responsible for any direct or indirect damage or loss of income that may occur during the use of the device.
Make sure that the COMPUTHERM DPA20-6/DPA25-6 circulation pump is diconnetcted from the power supply during the installation!
The device must be installed, put into operation, and maintained by a competent person and the necessary safety regulations must be followed! If you do not have the necessary knowledge and qualifications, please contact an official service!
Modifying the device involves the risk of electric shock or malfunction!
Make sure that the pump housing is not externally insulated, as this can lead to damage to the pump.
Do not operate the pump empty, without liquid!
The circulated liquid can be of high pressure or high temperature. Note this when assembling the device to avoid injuries!

Installing and commissioning the pump

Attention! When starting the pump, make sure that the system is filled with water, vented and the pressure of the suction nozzle reaches the minimum inlet pressure (see Technical data).
The pump can empty the remaining air on its own. To do this, switch it to level III for a few minutes when you turn it on, and the air will leave by itself. During this process, the pump may be louder than usual.

Changing the position of the electrical panel

The electrical panel of the pump can be rotated 90 degrees using the following steps:

Close the valves on the suction and discharge side and release the pressure.
Unscrew and remove the 4 screws securing the electric panel of the pump. (location is marked in image 3 of Figure 4.).
Rotate the pump housing 90 degrees in the desired direction.
Screw back the 4 screws securing the electric panel of the pump.
Open the valves on the suction and pressure side.

Connecting the device to the heating network

Control panel

The segment indicating the currently selected function is always lit on the display panel.
By pressing the buttons, the pump switches to another operating function.

Selectable characteristic curves of the pump and their display

Night mode

The COMPUTHERM DPA20-6 and DPA25-6 heating circulation pumps can also be operated in Night mode, with which significant energy savings can be achieved. Night mode can be used if the pump is installed in the forward branch of the heating system. When the water temperature sensored by the pump drops by more than 10 °C within 2 hours, the pump automatically switches to the energy-saving mode, by stage I. characteristic curve. When the temperature is rises at least by 10 °C (regardless of the duration), the pump will return to the normal operating mode that was selected before the energy saving mode was activated.

Attention! If the power supply to the pump has been cut off for some time, the Night mode must be reactivated!

Attention! If the pump is installed in the I., II. or III. use it in stage, then the night mode cannot be activated!

To activate Night Mode, press the Night Mode On/Off button on the control panel. Then the button on the control panel will light up until you turn off the function by pressing it again.

Displaying errors

In the part of the pump’s control panel marked with number 2 (Figure 2), instead of the consumption, the error code detected automatically by the pump is displayed. Unplug the device until the error has been eliminated!

Solving possible errors

Mounting sizes

Technical data:

Working voltage: 230 V AC 60/50 Hz
Max. medium temperature: +10 – +100 °C
Max. working pressure: 10 bar
Max free air temperature: 0 – 40 °C
Operating humidity: max. 95%
Max. head: 6 m
Max. flow: 3.3 m3/h (DPA20-6), 3.5 m3/h (DPA25-6)
Nominal width: G 1” (DPA20-6) ill. 1½” (DPA25-6)
Port to port length: 130 mm (DPA20-6) ill. 180 mm (DPA25-6)
Motor performance: 5 – 45 W
Max. current: 0.32 A
Energy label: „A”
Protection against environmental impacts: IP42
Insulation label: F
Material of the motor: cast iron
Type of the motor: permanent magnetic
Material of the runner: PES
Noise level: max. 45 dB
EEI: ≤ 0.23

The COMPUTHERM DPA20-6/DPA25-6 type pump complies with the requirements of directives EMC 2014/30/EU, LVD 2014/30/EU and RoHS 2011/65/EU.

https://computherm.info/en

Manufacturer: QUANTRAX Kft.
Fülemüle u. 34., Szeged, H-6726, Hungary
Phone: +36 62 424 133 • Fax: +36 62 424 672
E-mail: iroda@quantrax.hu
Web: www.quantrax.hu • www.computherm.info

Documents / Resources

COMPUTHERM DPA20-6 Energy Efficient Circulation Pumps [pdf] Instruction Manual
DPA20-6, DPA25-6, DPA20-6 Energy Efficient Circulation Pumps, DPA20-6, Energy Efficient Circulation Pumps, Efficient Circulation Pumps, Circulation Pumps, Pumps

References

User Manual

General informations