Part d - proving required water flow – Lifebreath 4TONDHW(T) User Manual
Page 39
39
PART D - PROVING REQUIRED WATER FLOW
PUMP:
D.2
Water Flow Rate
________ US GPM
D.3 Max. Head Press. at Water Flow
________ ft of head
(from specs)
D.4
Pressure Drop of Water Coil
________ ft of head
D.5
Available Head Press.
________ ft of head
(D.3 - D.4)
D.6
Total Effective Length
________ eff. ft
(from D.1)
D.7
Head Loss /100 ft
________ per 100 ft
(D.5 x 100
÷
D.6)
D.8
Pipe Diameter
________ in.
(Table D 2)
D.1 Effective Length Calculation
Fitting
#
EL
Total EL
________________ _________ x ________ = ___________
________________ _________ x ________ = ___________
________________ _________ x ________ = ___________
________________ _________ x ________ = ___________
________________ _________ x ________ = ___________
________________ _________ x ________ = ___________
________________ _________ x ________ = ___________
Measured (Actual) Length
___________
Total Effective Length
___________
TABLE D 1
EQUIVALENT LENGTHS FOR COPPER PIPE FITTINGS (straight pipe in feet)
FITTING
EQUIVALENT
FITTING
EQUIVALENT
LENGTH
LENGTH
Gate / Ball Valve (open)
1
long sweep 90
o
elbow
2
Globe Valve (open)
23
45
o
elbow
1
Angle Valve (open)
12
180
o
close return
6
Check Valve (open)
6
standard tee (straight through)
2
Balance Valve
18
standard tee (90
o
turn)
5
Standard Elbow
3
contraction or enlargement
2
TABLE D 2
HEAD LOSS PER 100 FEET OF EQUIVALENT LENGTH
FLOW
HEAD LOSS
HEAD LOSS
HEAD LOSS
HEAD LOSS
(US GPM)
(FT./100FT)
(FT./100FT)
(FT./100FT)
(FT./100FT.)
1
3
2
1
*
1.5
6
4
1
*
2
9
7
2
*
2.5
14
9
3
*
3
19
13
4
1
3.5
25
17
5
1
4
32
22
6
1
4.5
39
27
7
2
5
*
33
9
2
6
*
45
12
3
7
*
*
16
4
8
*
*
21
5
9
*
*
26
6
10
*
*
31
8
1/2" inside diameter
5/8" inside diameter
3/4" inside diameter
1" inside diameter
5