EUROSTER UNI4 User Manual
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EUROSTER UNI4 User Manual

Weather-based heating system controller
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EUROSTER UNI4 – USER MANUAL
MANUFACTURER: P.H.P.U. AS, Chumiętki 4, 63-840 Krobia, Poland
In order to take full advantage of the controller capabilities and ensure proper operation of the
central heating system, please read this user manual carefully.
1. APPLICATION
UNI4 is a universal controller designed to control a heating system equipped with:
Two independent CH zones with mixing valves (e.g. for floor heating, radiator heating)
◼
DHW circuit
◼
DHW circulation circuit (time-based control)
◼
Heating source control
◼
Feeding the buffer which supplies other zones
◼
Ability to control cooling or heating zones with a switch-over between heating and
◼
cooling by an external contact.
Heating system diagram
EUROSTER UNI4
Weather-based heating system controller
Manual version: 01.02.2021
1

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Summary of Contents for EUROSTER UNI4

  • Page 1 Manual version: 01.02.2021 1. APPLICATION UNI4 is a universal controller designed to control a heating system equipped with: Two independent CH zones with mixing valves (e.g. for floor heating, radiator heating) ◼...
  • Page 2 EUROSTER UNI4 – USER MANUAL S1 – Feeding temperature sensor 1 1. Feeding source No. 1 (buffer – top) 2. Feeding source No. 2 S2 – Feeding temperature sensor 2 3. Buffer tank S3 – Buffer temperature sensor - bottom PB –...

  • Page 3: User Interface

    EUROSTER UNI4 – USER MANUAL Switching off the heating automatically in case of outdoor temperature increase. ◼ 2.2. DHW circuit – filling the DHW tank Controlling the weekly schedule ◼ DHW priority ◼ Temporary limitation of DHW priority ◼ Disinfection of DHW circuits - with the schedule of periodic disinfection.
  • Page 4 EUROSTER UNI4 – USER MANUAL Additional heating source on (feeding no.2, with the buffer) The symbols shown in the controller have the following meaning: Pump operation Mixer operation No icon – thermostat operation off; flashing icon – thermostat operation on; active...
  • Page 5 EUROSTER UNI4 – USER MANUAL 3.5. List screens The controller settings are arranged hierarchically, according to the zone -> parameters order. Only the basic settings are available for the user. Advanced options are included in “Settings” and are protected with an access code.
  • Page 6 EUROSTER UNI4 – USER MANUAL Switching off the unused zone. Mixer ◼ Mixer dynamics ◼ Determines the time of mixer response to changes in the zone temperature. An excessive value may cause frequent cycling of the mixer, whereas the insufficient value may cause slowness in achieving the preset temperature.
  • Page 7 EUROSTER UNI4 – USER MANUAL DHW allowance ◼ The “DHW allowance” parameter determines the value by which the temperature of the heating source must exceed the temperature of the tank. Setting a higher temperature ensures adequate heating capacity and compensates for the heat loss due to the imperfect insulation of pipes connecting the boiler to the tank.
  • Page 8 EUROSTER UNI4 – USER MANUAL ◼ Boiler relay output (feeding no. 1) determines the way of boiler relay operation: ◼ AUTO – the temperature preset for the feeding temperature sensor will be established automatically depending on the demand for heat in individual zones.

  • Page 9: Installation

    CAUTION! Euroster Uni4 controller and a heat emitting device are connected to the “BOILER RELAY” output and must be powered from the same phase of the power system.
  • Page 10 EUROSTER UNI4 – USER MANUAL A room thermostat control may be switched on or off for each central heating zone. It is only allowed to use thermostats with a voltage-free normally open (NO) contact. It is recommended to use Euroster devices.
  • Page 11 EUROSTER UNI4 – USER MANUAL Connection diagram for the cooling mode.

  • Page 12: Controller Operation

    5.1. Feeding temperature The UNI4 controller uses the feeding relay 1 (boiler relay output) to control the operation of the main heating source in order to achieve the required temperature at the S1 feeding sensor.
  • Page 13 – the top and the bottom one – will have been reached. 5.8. Cooling UNI4 controller handles control of the cooling system in the summer season, and the heating system in the winter season. In the cooling mode the control of DHW, and feeding source no.

  • Page 14: Technical Data

    EUROSTER UNI4 – USER MANUAL 6. POSSIBLE ERRORS IN THE CONTROLLER OPERATION 6.1. A selected zone is not heating – closed valve or inactive pump Check: Whether the heating season is switched on, ◼ Whether the correct date (day of the week) and time is set, ◼...

  • Page 15: Simplified Declaration Of Conformity

    10. SIMPLIFIED DECLARATION OF CONFORMITY P.H.P.U. AS AGNIESZKA SZYMAŃSKA-KACZYŃSKA hereby represents that the type of Euroster UNI4 equipment conforms to the following directives: 2014/35/EU (LVD), 2014/30/EU (EMC), 2011/65/EU (RoHS). The complete text of the Declaration of EU conformity is available at the following Internet address: www.euroster.pl.
  • Page 16 EUROSTER UNI4 – USER MANUAL WARRANTY CERTIFICATE EUROSTER UNI4 CONTROLLER Warranty terms: 1. The warranty is valid for 24 months from the device sale date. 2. Rights under the warranty are exercised within the territory of the Republic of Poland.

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