AERCO KC Standard to Low NOx Convertion Instructions - Manual (Page 18)

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4. Due to space limitations, the new Low NOx Burner Head and Shell must be temporarily
separated as described in the previous step and installed as follows:
(a) First, insert the Burner Head inside the Heat Exchanger.
(b) While hold the Head in the raised position, place the Fiber Frax Gasket and Burner Shell
under the unit.
(c) Lower the Burner Head and align it so that the ground stud shown in Figure 16 is aligned
with the hole in the Shell flange. Also, ensure that the Shell air inlet is positioned as
shown.
(d) Raise the complete Low NOx Burner Assembly and secure it to the Heat Exchanger studs
using the six 5/16-18 hex nuts removed from the old burner.
(e) Next, install the 1/4” O.D. tube and 1/8” NPT nipple (3” long) as shown in Figure 17.
Ensure that the 1/4” tube is inserted into the staged ignition orifice piece. Thread the
nipple into the tapped hole in the bottom of the Burner Shell.
(f) Refer to Figure 19 and remove the 1/8” street elbow from the outlet end of the Staged
Ignition Assembly provided in the Conversion Kit.
NOTE
The Staged Ignition Assembly part number provided in the Low NOx
Conversion Kit will depend on whether the unit being converted is equipped
with a Siemens or a Honeywell SSOV. Kits 124918-1 and -2 contain Staged
Ignition Assembly part no. 124867 for use with Siemens SSOVs. Kits 124918-
3 and -4 contain Staged Ignition Assembly part no. 124983 for use with
Honeywell SSOVs.
(g) Attach the street elbow to the 3” nipple and securely tighten the nipple to the Burner Shell.