Balancing And Setting The System; Dimensional Example - emmeti TM3 Mixing Unit Manuel D'installation Et D'utilisation

3. BalaNCINg aND SETTINg THE SYSTEM

3.1 Dimensional example

3.1.1 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.  fig. A):
the less the bypass opens, the shorter the response time of the mixing
valve to the temperature variations and the requested delivery tempera-
ture 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 delivery temperature cogging due to the
opening-closure of the various areas the heating system is divided into.
Mixing unit pressure drops
Perdite carico gruppo miscelazione
1000
0 Kv=3
1 Kv=3,4
2 Kv=3,8
3 Kv=4,2
4 Kv=4,5 4 Kv=4,5
5 Kv=4,8
100
10
1 0 0
k 0
0 1 0 0 1 0 0
Q [l/h]
Yonos Para Circulator Diagram
H [m]
6
5
4
3
2
1
0
0,5 1,0
0 0
ΔP Constant
p Costante
1,5 2,0 2,5 3,0
Q [m /h]
3
GB GB
9