CALEFFI ThermoSetter 116140A 매뉴얼 - 페이지 9
{카테고리_이름} CALEFFI ThermoSetter 116140A에 대한 매뉴얼을 온라인으로 검색하거나 PDF를 다운로드하세요. CALEFFI ThermoSetter 116140A 12 페이지. Recirculation thermal balancing valve
CALEFFI ThermoSetter 116140A에 대해서도 마찬가지입니다: 설치, 시운전 및 서비스 지침 (9 페이지), 설치, 시운전 및 서비스 지침 (13 페이지)
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Flow characteristics
The ThermoSetter thermostatic balancing valve is designed to balance
individual branches of domestic hot water recirculation systems, based
on the temperature at the valve. It automatically modulates flow to
maintain hot water availability to all fixtures in the branch circuit.
The valve is at minimum flow (Cv = .23) when the incoming water
temperature is equal to the set-point position of the adjustment
dial. The valve opens as incoming water temperature drops.
For pressure loss calculations in the recirculation system, follow
traditional pipe sizing and head loss practices. For pressure loss
calculations across the ThermoSetter valve, use the design curve
shown in the graph below. This line represents a typical valve position
under normal working conditions (∆T= 10°F). Determine the pressure
drop across the valve by selecting the branch design GPM on the
graph X-axis, draw a vertical line up to the "design" curve, then
go across to the Y-axis to find the design pressure drop. Include
that pressure drop in your head loss calculations for the circuit.
14.5
10
7.25
6
5
∆p (psi)
4
3.00
2.00
1.50
1.00
0.70
0.50
0.30
0.20
0.15
0.10
0.07
0.05
0.03
0.02
0.01
The "by-pass mode" curve in the chart above shows the head loss of
the valve when it is in by-pass thermal disinfection mode for Legionella
control.
10˚F ∆T
inlet to setpoint
0.23 Cv
minimum
0.52 Cv
design
1.2 Cv
by-pass
2.1 Cv
full open
Operation in
by-pass mode
9
∆p (kPa)
20
13
11
7.0
3.5
2.0
1.4
1.0
0.7
0.5
0.3
0.2
0.1
3
4.5
6 7 8.810 11
2. 5