purmo Euro Pump Unit Instructions

: June 9, 2024
: PURMO

EURO PUMP UNIT

purmo Euro Pump

INSTALLATION AND OPERATION MANUAL

Thank you for trusting us and purchasing one of our products. We ask that you read this manual carefully, which contains all the specifications and all relevant information for proper operation. The information contained in this manual can be adjusted if necessary due to technical changes.

1. DESCRIPTION

purmo Euro Pump - Fig. A

a) Boiler Flow
b) Boiler return

1.1 Construction

(1) Nr. 1 Mixing valve with M30x1.5 connection thread for the attachment of a thermostat head 20-65°C with capillary sensor or an electric servomotor (not included);
(2) Nr. 1 Thermostatic head 20-65°C with capillary sensor;
(3) Nr. 1 Check valve;
(4) Nr. 1 Vent valve
(5) Nr. 1 thermometer 0-80° C;
(6) Nr. 1 immersion sleeve for capillary sensor
(7) Nr. 1 ball valve set (not included);
(8) Nr. 1 High efficiency pump DAB EVOSTA 2 70/130 (1″) (depending on version)
(9) Nr. 1 Connectors set 1″ male thread x 1″ union nut

1.2 Technical data

Primary circuit maximum temperature :	90 °C
Maximum pressure:	10 bar
Primary circuit max ΔP:	1 bar

2. INSTALLATION AND TESTING

2.1 Installing the unit

The mixing unit is connected directly to the manifold. When installing the unit in a cabinet, a minimum installation depth of 120 mm must be taken into account.

purmo Euro Pump - Fig. B and C

a) BLACK DOT
b) RED

2.2 Installation of thermostatic head with capillary sensor

To make it easier to assemble, set the maximum value on the thermostatic head. Bear in mind you need to set it back to the temperature envisioned in the project for the floor-mounted system.
Then insert the probe in the well (Ref. (6) Fig. A).

2.3 Limitation of the maximum temperature

Remove the red pin (ref.(2) fig. B).
Set the desired maximum temperature.
Locate the printed black dot (ref. (1) Fig. B) between the temperatures 70 and 20 ° C.
Insert the pin (ref. (2) Fig. C) into the first slot in front of the black dot.
After successful adjustment, the button cannot be set to any higher Temperatures than desired one.

Factory setting: 50°C
If necessary, the optional safety temperature switch (item no. FAW3MAO051085000) can also be installed. This is electrically connected to the pump and switches it off when the set maximum temperature is exceeded. For information about the wiring of the safety temperature monitor, please refer to its operating instructions.

2.4 Testing and filling

– Carry out the hydraulic test on the unit, close the valves and the lockshields on the manifold.
– At the end of the test, reduce the pressure inside manifolds using the drain valves.
– Now fill each circuit individually by opening the valve and lockshield of the single way until all the air comes out.
– For a correct filling connect the water supply to the drain valve in the flow manifold on the top and a tube to the drain valve in the return collector. Inside the mixing unit there is a check valve that prevents backflow circulation inside the unit, thereby making it easier to expel the air inside the circuits (fig. D and E).

purmo Euro Pump - Fig. D

purmo Euro Pump - Fig. E

a) Check valve

2.5 Adjusting the connection side

It is possible to install the device on the right or left of the manifold (assembly on the left is the delivery condition). For installation on the right side of the manifold, it is necessary to turn the head piece by 180°. To do this, please remove the vent valve and the union nut, turn the head piece by 180° and mount the vent valve and the union nut on the opposite side (Fig. F).

purmo Euro Pump - Fig. F

2.6 Venting and setting the pump

See chapter 4, instruction manual at following link

3. BALANCING AND SETTING THE SYSTEM

3.1 Design example

Calculation example:

Calculation example:
P = desired power of the radiant heating = 6000 W
t vsek = secondary flow temperature in the radiant heating = 40°C
t vpri = primary flow temperature from the heat generator = 70°C
Δt sek = secondary circuit spread = 5K
t Rsek = secondary return temperature of the radiant heating = tvsek – Δtsek = 40 – 5 = 35°C
V = flow rate secondary circuit =(P [W] x 0.86 / (Δtsek) = (6000 x 0.86)/ 5 = 1032 l/h
Δp valv = pressure loss mixing unit (see diagram 1) = 90 mbar.
The pressure loss over the radiant heating circuits must be added to the pressure loss of the mixing unit. This means that with a pressure loss in the heating circuits of e.g. 200 mbar, there is a total pressure loss of 290 mbar (90 + 200 mbar). This is the head that the pump has to provide and set.
According to the pump curve, the pump must therefore be set to constant level PC2 (see diagram 2).

Mixing unit pressure lost

purmo Euro Pump - Mixing unit pressure lost

DAB Evosta2 70/130 – Performance Curves

purmo Euro Pump - Performance Curves

3.2 Adjusting the project temperature

The flow temperature (20-50°C) of the underfloor heating circuit (secondary circuit) is selected on the thermostatic head (Ref. (2) Fig. A) and held constant (fixed value control). The thermostat head is connected to the remote sensor via a capillary.

Attention:
Normal operation of the underfloor heating may only take place after the end of the rest and heating time of the screed (e.g Cement screed 21 days idle time + min. 7 days functional heating). Before laying the floor coverings, according to EN 1264 functional heating can be carried out. To do this, the flow temperature must be at 25°C for 3 days and then for at least 4 days adjusted to the design temperature.

Proceed as follows to preset the design temperature:

Set the thermostatic head to the desired flow temperature value.
Wait until the system temperatures have stabilized (secondary circuit flow and return temperature should be as constant as possible) and then compare the secondary circuit spread with the system calculation.

Commissioning – causes of errors
– Are all heating circuits open and hydraulically balanced?
– Are the actuators open?
– Do the calculated results corresponds to the setting of the pump curve?
– Are the primary circuit temperature (it should be at least 5K higher than the desired secondary circuit temperature) and the primary circuit volume flow sufficient?

4. DAB EVOSTA 2 70/130 PUMP

4.1 Notice and operating condition

purmo Euro Pump - Notice and operating condition

4.2 Position of the user interface

purmo Euro Pump - Position of the user interface

4.3 Bleeding the pump

purmo Euro Pump - Bleeding the pump

Always vent the pump before starting!

The pump must never run when dry.

4.4 Adjusting the control curves

Depending on the system requirements, EVOSTA2 circulating pumps enable the following control modes:
PP1-3: Proportional differential pressure control depending on the flow rate
CP1-3: Control at constant differential pressure (preferred setting for panel heating; factory setting CP3)
I-VI: Constant speed control

Control panel

purmo Euro Pump - Control Panel