Adjusting The Project Temperature - emmeti TM3 Mixing Unit Manuel D'installation Et D'utilisation

3. BalaNCINg aND SETTINg THE SYSTEM
3.1.2 Climatic regulation dimensioning example
By using the same project data of the previous example:
A flow rate of 1032 l/h corresponds to a pressure drop of 60 mbar (0.06
bar), see diagram below
Assuming the same ΔP pav = 0.25 bar the capacity of the Wilo Yonos
PARA circulator must be set in order to ensure a flow rate of 1032 l/h
/h) and a head H = ΔP valv + ΔPpav = 0,06 + 0,25 = 0,31 bar
(1.03 m
3
(≅ 3,1 m CA).
Electronic com. mixing valve pressure drops
Perdite di carico valvola miscelatrice com. elettronico
1000
100
10
1 0 0
3.2

Adjusting the project temperature

3.2.1 Thermostatic regulation with thermostatic
head
The delivery water temperature of the floor-mounted system is set on the
thermostatic head (ref. no.  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.
0 1 0 0 1 0 0
Q [l/h]
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
3.2.2 Climatic regulation with servomotor
0 0
The system's supply water temperature is controlled by the climatic regula-
tion unit in relation to the set operating parameters (ambient temperature,
heating periods, climate curve slope, etc.) and the detected ambient, supply
and outdoor temperature values.
The delivery temperature is detected by the control unit via the probe (ref.
 Fig. A).
The return temperature can be detected with a second probe, for which
there is already a housing (ref.  fig A).
The mixing valve is adjusted by the servomotor.
The probe and the servomotor must be cabled to the control unit by
following the wiring diagram and the directions contained in the manuals
that come with the kit.
TM3 units can be fitted with 2 different kinds of servomotors:
– 3-point servomotor (in combination with the heating-only RCFH climate
regulator or the PCO regulator for heating and cooling).
– 0-10 VDC servomotor (only in combination with the PCO climate
regulator for heating and cooling).
The circulator's speed must be adjusted in relation to the required flow rate.
GB GB
11