Specifications

10
Calculated Maximum Run –The longest allowable
‘calculated run’ from the burner to the exhauster
including the condensing pipe.
Calculated Minimum Run – The minimum allowable
‘calculated run’.
Calculated Run – Calculated run is determined by
adding the total ‘single flow’ plus one half of the
‘common flow’ of Pipe. For Example, if an actual run,
has 30 feet of ‘single flow’ and 20 feet of ‘common
flow’, this equals 40 feet (30 ft. + one half of 20 ft.) of
Calculated Run. Refer to figure 2-6.
Calculated Starting Point of Condensing Run – The
point in the ‘calculated run’ where condensing pipe must
begin. Refer to figure 2-7 for an example.
Common Flow – The radiant pipe in a run between
the first intersection (tee or cross) and the exhauster.
‘Common Flow’ begins at the point where two (2) or
more burners share a common exchanger. Refer to
figure 2-6.
Minimum Distance to Elbow or Intersection – The
minimum allowable distance from the burner box to
the first elbow or intersection.
Run – The total
actual length of radiant pipe from the
individual burner box to the exhauster.
Single Flow – The radiant pipe in a run from the burner
box to the first intersection (tee or cross). Refer to
figure 2-6.
Figure 2-6 Figure 2-7
In figure 2-7, a model HLV-75 starts it’s condensing
pipe at 50 calculated feet (40 feet plus one-half of 20
feet). The amount of condensing pipe in this particular
example is 20 ft.
In figure 2-6, the actual run has 30 feet of single flow
and 20 feet of common flow, this equals 40 feet (30
ft. + one half of 20 ft.) of calculated run.
Tube Heater Vacuum System
Tube Heater Vacuum Systems Installation, Operation, Maintenance and Parts Manual
Definitions
2.4 Definitions
!
Please read this important definition carefully!
ISOLATION BOOT
VACUUM PUMP
PRIMARY DAMPER
HLV-75HLV-75
20 FT
30 FT
30 FT
40 FT
40 FT
HLV-75HLV-75
40 FT
20 FT
20 FT
VACUUM PUMP
START POINT OF
CONDENSING