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150/200 MBH - PRIMARY LOOP EQUIVALENT LENGTH CALCULATION & PUMP SELECTION
For 150/200 MBH Boilers
(This boiler must be piped with a primary loop)
These charts are valid for piping diagrams on pages 17 & 18
Instructions:
1.
Pipe diameter determines pump size. Smaller the diameter of pipe, larger the pump. 150/200 Mbh boilers can be
piped in 3/4" , 1" or 1¼" pipe. Use charts 1-4 to determine pipe size and respective pump size.
2.
Fill in chart using the 1" section first. Then consult chart 4 for pump selection.
3.
Pump size may be decreased by decreasing equivalent length of pipe. Use larger diameter pipe as primary loop to
decrease equivalent length. Use charts 2 or 3.
Note: The figures below are based on industry average. Consult valve/fitting manufaturer for exact equivalent length or
for fittings not shown below.
Chart 1
A
B
C
Pipe Diameter
Fitting
Enter Number of
Fittings
Multiply By
Equivalent Length
A x B
1"
90° Elbow
2.5
45° Elbow
1.3
Tee-branch
5.0
Tee-through
1.7
Swing check valve
8.3
Lift check valve
50.0
Enter Total 1" straight pipe length in feet
Add up numbers in column C
Total equivalent length of Primary
Pump Factor
Chart 2
A
B
C
Pipe Diameter
Fitting
Enter Number of
Fittings
Multiply By
Equivalent Length
A x B
1¼"
(Any pipe/fitting
larger than 1¼",
count as 1¼")
90° Elbow
3.1
45° Elbow
1.7
Tee-branch
6.3
Tee-through
2.1
Swing check valve
10.4
Lift check valve
62.5
Enter Total 1¼" straight pipe length in feet
Add up numbers in column C
Total equivalent length of Primary
Multiply Total of Column C in Chart 2 by 0.35
Pump Factor
P/N# 240010615, Rev. E [07/2015]
Summary of Contents for SSV-050
Page 50: ...50 13 TROUBLE SHOOTING P N 240010615 Rev E 07 2015 ...
Page 52: ...52 13 TROUBLE SHOOTING P N 240010615 Rev E 07 2015 ...
Page 64: ...64 14 1 Connection Diagram 050 075 100 MBH 14 WIRING DIAGRAM P N 240010615 Rev E 07 2015 ...
Page 66: ...66 14 3 Connection Diagram 150 200 MBH 14 WIRING DIAGRAM P N 240010615 Rev E 07 2015 ...
