Detroit Radiant Products Company HLV Series - Manual (Page 14)

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HLV Series 2.0 Design • System Design Definitions
System Design Definitions
Calculated Maximum Run:
The longest allowable ‘Calculated Run’ from any burner to the vacuum pump, including condensing pipe.
Calculated Minimum Run:
The shortest allowable ‘Calculated Run’ from any burner (including V-TTS Tandem Tee runs) to the vacuum pump,
including condensing pipe.
Calculated Run ***read carefully*** :
Calculated run is determined by adding the total ‘Single Flow’ plus one-half of the ‘Common Flow’ of tubing/pipe
from any burner to the vacuum pump.
Calculated Starting Point of Condensing Run:
The point in the ‘Calculated Run’ where condensing pipe must begin. See Figure 2.3.
Common Flow:
The tube/pipe in a run between the first intersection (tee or cross) and the vacuum pump. ‘Common Flow’ begins
at the point where two or more burners share common tube/pipe. See Figure 2.2.
Minimum Distance to Elbow or Intersection:
The minimum allowable distance from a burner to the first elbow or intersection.
Run:
The total actual length of tube/pipe from an individual burner to the vacuum pump.
Single Flow:
The tube/pipe in a run from the burner to the first intersection (tee or cross). See Figure 2.3.
Figure 2.2 • Single and Common Flow
Figure 2.3 • Starting Point of Condensing Pipe
Com
mon
F
lo
w
Single Flow Single Flow
20 ft.
HLV-75 HLV-75
Vacuum Pump
30 ft. 30 ft.
HLV-75 HLV-75
Vacuum Pump
20 ft.
40 ft. 40 ft.
40 ft.
Starting Point of Condensing