Roberts Gorden CRV-B-4 - Manual (Page 27)

SECTION 7: E XAMPLE CRV-S ERIES S YSTEM L AYOUTS
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SECTION 7: EXAMPLE CRV-SERIES SYSTEM LAYOUTS
Systems that are symmetrical are preferred because
the vacuum available in the system branches are bal-
anced as a function of design (damper couplings are
not needed).
Where radiant tube lengths are variable in a single
branch, the average length shall be used to determine
the total radiant tube length. Tailpipe will begin after
the last radiant tube following the last burner in the
branch.
CRV-Series is most effective when there are at least 3
burners in the radiant branch.
To assist with the selection of burners and system
designs, the following figures show system layouts that
have been used extensively with CRV-Series since
1962. Designing systems using these layouts will
mean altering the dimensions to suit the individual
building.
Generally, shared tailpipe reduces the available sys-
tem vacuum. See Page 14, Section 5.3 for shared
tailpipe design rules.
FIGURE 18: Example System Layout (Option 1)
7.1 Example System Layout (Option 1)
Six B10 burners at minimum radiant tube length and
2.5 ft/flow unit tailpipe, the recommended pump for
this system is an EP-200 Series pump.
This system provides maximum radiant intensity on
the left and right and adds supplemental radiant
effects through the center creating very even radiant
effects over the coverage area.
Layout to provide high system efficiency, condensed
radiant output and good uniformity of distribution.
Adjust the lengths as necessary for different input sys-
tems and to change the efficiency levels.
CORAYVAC ®
Burner
LEGEND
Pump
Damper
Radiant Tube
Tailpipe
6" Tailpipe
30'
(9 m)
30'
(9 m)
30'
(9 m)
20'
(6 m)
20'
(6 m)
20'
(6 m)
10' (3 m)