Detroit Radiant Products Company HLV Series - Manual (Page 11)

HLV Burner Model
Minimum Distance from
Burner to First Elbow or
Intersection
Calculated
Minimum Run*
Calculated
Maximum Run*
HLV-40, HLV-50, HLV-60 10 ft. 30 ft. 60 ft.
HLV-75, HLV-80 10 ft. 35 ft. 65 ft.
HLV-90, HLV-100 10 ft. 40 ft. 70 ft.
HLV-110, HLV-120, HLV-125 10 ft. 45 ft. 75 ft.
HLV-140, HLV-150 15 ft. 50 ft. 80 ft.
HLV-170, HLV-175, HLV-180 15 ft. 55 ft. 85 ft.
HLV-200 20 ft. 60 ft. 90 ft.
11
HLV Series 2.0 Design • Design for Non-Condensing Systems
Design for Non-Condensing Systems
Chart 2.1 • Design Parameters for Non-Condensing Systems (refer to page 14 for definitions).
System tube lengths are determined by the gas input (BTU/h) of each burner. Chart 2.1 below indicates
system design parameters for each burner model used in each system. When calculating tube lengths,
do not add in elbow and tee fittings as they have been accounted for.
Designing a non-condensing system can be fairly straightforward given the following steps are read
carefully. In addition to these steps, an understanding of the design definitions is critical. Refer to p.14
for these terms and illustrations.
1 Begin by designing a tentative layout without regard to design parameters. Use this approach to
place each burner and the vacuum pump where most desired (refer to Figures 2.4 - 2.10 for typical
layouts).
2 Once a tentative layout has been established, confirm that each run in the system meets the criteria
for ‘Calculated Minimum Run’. ‘Calculated Minimum Run’ is determined by adding the total ‘Single
Flow’ plus one-half of the ‘Common Flow’.
• If the system does not meet the ‘Calculated Minimum Run’, length must be added to the run until
all burners meet the design parameters.
• If the run exceeds the ‘Calculated Maximum Run’, it will be necessary to either make the system a
condensing system or shorten the runs which exceed this criteria.
3 Confirm the following applies (non-condensing systems only):
a) A maximum of two elbows per run is allowed per system.
b) A maximum of three intersections (tees or crosses) are allowed per system.
c) All elbows and intersections less than 20 feet from a burner require a reflector.
* Be sure to account for runs where Tandem Tee Set (V-TTS) are used in the system.
NOTE: Contact the factory for approval when system design exceeds the guidelines set forth in the
table above.