Roberts Gorden NDUSTRIA NHE Series, Installation, Operation & Service Manual

Page: 26 / 78

NHE-S
ERIES
I
NSTALLATION
, O
PERATION AND
S
ERVICE
M
ANUAL
22
Step 6.6 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 below.
Begin installing swirler at end of tube section
as described in the "Swirler Installation" chart
below 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
Model Tube Section Swirler Qty
NHE-125 3rd 10' (3 m) Section 2 St 2 Adapters
NHE-150 4th 10' (3 m) Section 1 S 1 Adapter
NHE-175 5th 10' (3 m) Section 2 St 1 Adapter
Swirlers should not to be installed through 180° "U"
sections or elbows. For this reason, 15' and 20' long
swirler packages each contain 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 figures 21 through 27.