Roberts Gorden DF, Installation, Operation & Service Manual

Page: 28 / 74

DF-S
ERIES
I
NSTALLATION
, O
PERATION AND
S
ERVICE
M
ANUAL
24
Step 6.5 Swirler Installation
Description Part Number
Swirler Starter 62" (1.6 m) 03051506
Swirler Adapter 62" (1.6 m) 03051507
Tube 91409XXX
Swirler installation required for models
specified in chart.
Begin installing swirler at end of tube section
as described in the "Swirler Installation
Chart” and continue towards burner.
Note:
If heater length is extended 10' (3 m)
beyond the specified minimum heat
exchanger length swirler can begin in either
the specified tube section (according to the
"Swirler Installation Chart”) or the end of the
10' (3 m) extension and continue towards
burner.
Swirler Installation Chart
Model Tube Section Swirler Qty
DF-175 4th 10' (3 m) Section 2 St 1 Adapter
DF-200 5th 10' (3 m) Section 1 S 1 Adapter
Swirlers should not to be installed through
180° "U" sections or elbows. For this reason,
15' long swirler package contains 2 swirler
starter sections to allow for starter pieces to
be installed before and after "U" sections and
elbows. Swirler starter section identified as
section with tab on end. Swirlers should be
installed as shown in
Figure 19 through
Figure 21 .