Detroit Radiant Products Company HLV Series - Manual (Page 19)

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HLV Series 2.0 Design • Damper Application
Damper Application
Figure 2.12 • Damper Placement • Equal Burner Inputs and Equal Tube Runs*
Figure 2.14 • Damper Placement • Equal Burner Inputs and Variable Tube Runs*
A primary damper is provided with every system which is placed before the vacuum pump.
Systems with variances in burner gas inputs and/or radiant tube runs will require the placement of
secondary dampers* to balance the system’s exhaust flow.
NOTE: A maximum of six dampers are
allowed in a system. Refer to Figures 2.12 - 2.14 for examples of damper placement.
Figure 2.13 • Damper Placement • Variable Burner Inputs and Equal Tube Runs*
This system is comprised of two 75,000
BTU/H burners with equal lengths of radiant
tube running to the vacuum pump. Only the
primary damper is required in this type of
system.
HLV-75
Vacuum Pump
20 ft.
30 ft.
Primary Damper
Isolation Boot
30 ft.
HLV-75
40 ft.
HLV-100 HLV-75
Vacuum Pump
20 ft.
Primary Damper
Isolation Boot
40 ft.
Secondary Damper
40 ft. 30 ft.
Secondary Damper
Vacuum Pump
20 ft.
Primary Damper
Isolation Boot
HLV-75
HLV-75
This system is comprised of two 75,000
BTU/H burners with unequal lengths of tube
run to the vacuum pump. The primary
damper is required at the vacuum pump and
a secondary damper is required prior to the
tee serving the shorter tube run.
A 75,000 BTU/H and a 100,000 BTU/H
burner with equal lengths of radiant tube
running to the vacuum pump make up this
system. The primary damper is required at
the vacuum pump and a secondary damper
is required prior to the tee serving the lower
BTU/H burner.
* In the event where a 40,000, 50,000 or 60,000 BTU/H burner shares a common run with a 75,000
BTU/H burner or higher, each run
must be dampered prior to each tee. This allows ease in balancing
the higher box pressure set points present on HLV-40, HLV-50 and HLV-60 burners. A sample of this
design scenario can be viewed online at www.reverberray.com/cad.