Emmeti TM3-R Mixing Unit Instruction Manual

Emmeti TM3-R Mixing Unit

Thanks you

Thanks you for the trust you have shown by purchasing this product. Carefully read this manual which contains the specifications and all the information useful for the correct functioning. The information contained in this publication may be subject to changes at any time and without any notice whatsoever for technical and/or commercial reasons as they arise; therefore, we cannot be held responsible for any errors or imprecisions contained herein.
Warning! Keep these manuals in a dry place avoiding in this way to spoil them.

DESCRIPTION

Construction

1. No. 1 mixing valve with M30x1.5 thread designed for the installation of a thermostatic head with an immersion probe from 20 to 65°C or an electric servomotor (not supplied);
2. Nr. 1 calibration valve and by-pass;
3. Nr. 1 ½” manual air vent valve;
4. Nr. 1 thermostatic head with immersion probe setting from 20 to 65 °C limited to 50 °C;
5. Nr. 1 non-return valve;
6. Nr. 1 thermometer 0 – 80 °C scale;
7. Nr. 1 housing for flow temperature probe;
8. Nr. 1 housing for safety thermostat probe;
9. Nr. 1 electronic circulator GRUNDFOS UPM3 Auto L with three -pole cable L 1000 mm;
10. Predispositions for creating a hole for wall mounting by means of screw and dowel (not supplied);
11. Nr. 1 ball valve set (not supplied)

Technical data

Primary circuit maximum temperature :|

90 °C

---|---
Maximum pressure:|

10 bar

Primary circuit max ΔP:|

1 bar

Secondary control range: (thermostatic regulation)|

20÷65 °C

Heating capacity that can be exchanged (ΔT 7°C, ΔP available 0.25 bar)
Thermostatic regulation|

10 kW by-pass pos. 0

Thermostatic regulation|

12.5 kW by-pass pos. 5

Mixing valve pressure drops|

Kv 3

Pressure drops with open bypass valve|

Kvmax 4.8

Thermometer scale:|

0÷80 °C

Mixing unit inlet threads:|

G 1” F

Connections Thread:|

G 1” M

Circulator connections: pipe union|

1”1/2 – takeoffs 130 mm

Hydraulic diagram of thermostatic regulation units and electronic circulator

INSTALLATION AND TESTING

Installing the unit

The mixing unit can be installed directly on the wall connected to distribution manifold or fixed by means of suitable plugs and screws (depending on the kind of wall) to be applied in correspondence of the holes (ref. @fig.A)to be drilled on bodies constituting the unit.
The unit can also be installed in a metal cabinet if it is connected to the distribution manifolds, in this case provide a minimum depth of 120 mm.

Installation of thermostatic head with immersion probe for fixed regulation immersion probe for thermostatic regulation

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. 7 Fig. A).

Limitation of the maximum temperature

1. Remove the red latch (rif. 2 fig. B).
2. Set the desired maximum temperature.
3. Locate the black dot printed (rif.1 fig. B) between the temperatures 70 and 20 ° C.
4. Insert the latch (rif.2 fig. C) in the first slot which precedes the black dot.
   After successful operation, the knob can not be positioned on higher temperatures than desired.

Testing and filling

• Carry out the hydraulic test on the unit, close the valves and the lockshields on the distribution 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 drainvalve 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)

 BALANCING AND SETTING THE SYSTEM

Dimensional example

Thermostatic regulation

Project data:

P = capacity to provide to the floor-mounted system = 6000W
Tip = delivery temperature of the floor system = 40°C
Tc = temperature of the water coming from the boiler = 70°C
ΔTip = project temperature drop of the floor-mounted system = 5°C
Tr = floor-mounted system return temperature = Tip –ΔTip = 40 – 5 = 35°C
Qip = floor-mounted system flow-rate = (P[W] x 0,86) / (ΔTip) = (6000 x 0,86) / 5 = 1032 l/h
ΔP valv = control valve pressure drop From the diagram underneath the 1032 l/h flow rate, there are 6 different curves that correspond to the various bypass adjustments (ref. 2 fig. A):

the less the bypass opens, the shorter the response time of the mixing valve to the temperature variations and the requested delivery temperature is reached in a shorter amount of time. Conversely, the opening of the bypass reduces the drops by increasing the system’s flow-rate and simultaneously reducing the flow temperature oscillations due to the opening-closure of the various areas the heating system is divided into.

UPM3 AUTO L 25-70

By setting the bypass to 1, a 1032 l/h flow rate corresponds to a 90 mbar pressure drop (0.09 bar).
Assuming that ΔP pav = floor-mounted system pressure drop = 0.25 bar, set the capacity of the GRUNDFOS circulator in order to sure a flow rate of 1032 l/h (1.03 m3 /h) and a head H = ΔP valv + ΔPpav = 0.09 + 0.25 = 0.34 bar (≅ 3,4 MWC)
Here below are some tables that report the data for systems selected based on the requested heating capacity.
Therefore, first use the table or formulas to carry out the setting and then use the thermometers to make sure the project temperatures of the fluid are actually reached.
To increase the ΔT of the floor circuits, just reduce the bypass flow rate.

GRUNDFOS UPM3 AUTO L 25-70

Adjusting the project temperature

Thermostatic regulation with thermostatic head

The delivery water temperature of the floor-mounted system is set on the thermostatic head (ref. no. 4 Fig. A ), which can be set to from 20 to 65°C and kept steady thanks to the action of the valve itself.
The head’s thermostatic element is connected to the immersion probe through a capillary.

Warning
The floor-mounted system can be heated up only after the screed’s curing (at least 28 days for cement screeds).
Before laying the flooring, you need to start the system by setting the water temperature to 25°C for 3 days.
Then, increase it by 5°C every 3 days, until you reach 50°C and keep this temperature for at least 4 days.

Proceed as follows to set the project temperature:

1. Turn the knob of the thermostatic head, thereby setting the value of the delivery temperature.

2. Wait for the system to be fully activated and make sure the delivery temperature and the temperature drop between the delivery and return line of the floor-mounted system are in line with those reported in the project.

3. If necessary, proceed as follows to adjust the calibration bypass:

   • Excessively high temperature drop.
     Insufficient flow rate, gradually open the calibration by-pass valve until you reach the project’s temperature drop.

   • Delivery temperature below the set value.
     Gradually close the calibration bypass valve in order to create a differential pressure to inject the hot fluid coming from the boiler.

Activation – Troubleshooting

• The circuits of the floor-mounted system must be open.
• Any electrothermal heads must be set to the open position.
• Any overpressure valves must be calibrated in related to the features of the circulator

REPLACING THE COMPONENTS

Replacing the circulator

Proceed as follows to replace the circulator:

1. close the (ref. 1fig. G) upstream and downstream ball valves (if any) of the mixing unit;

2. Empty the return manifold via the drain valve (rif. 2 fig. G) ;
   

3. power off the equipment;

4. loosen the pipe joints;

5. disconnect the power cable;

6. take out the circulator and replace it with the new one;

7. re-connect the circulator’s power cable by following the directions reported on the leaflet enclosed with the circulator itself;

8. tighten the pipe joints;

9. power on the equipment again and open the ball valves and lockshields/meters of the distribution collectors if installed

Note If you are replacing the circulator, it is best to only replace the motor unit plus the impeller and leave the hydraulic body in place.

Replacing the thermostatic head
Proceed as follows to replace the thermostatic head:

• take out the probe from the well;
• unscrew the thermostatic head and replace it;
• insert the probe in the well.
  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

GRUNDFOS CIRCULATOR

Note: The complete manual is available on the manufacturer’s website www. grundfos.it

UPM3 AUTO L 25-70

Performance|
---|---
Line Type| Description
| Constant Curve
| Proport. Pressure
| Constant Pressure

High efficiency

Electrical data 1 x 230 V, 50 Hz

Speed| P 1 [W]| I 1/1 [A]
Min.| 4| 0,06
Max| 33| 0,36
Setting|
---|---
PWM A| PWM C| PP| CP| CC

–

|

–

| 3| 3| 4

Performance View

OPERATION STATUS

ALLARM STATUS

| Blocked
---|---
| Supply voltage low
| Electrical error

KEY LOCK

SELECTION

Customer Support

Respect the environment!
For a correct disposal, the different materials must be divided and collected according to the regulations in force.

References

• Italian (Italy) | The full range supplier of pumps and pump solutions. As a renowned pump manufacturer, Grundfos delivers efficient, reliable, and sustainable solutions all over the globe. Step into our world.

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