AERCO Packaged WaterWizard Steam-to-Water Heater - Manual (Page 35)

1B+ II Water Wizard Water Heaters
HE-110
Installation, Operation & Maintenance Manual OMM-0063_0C
MC2: 07/26/13 Page 35 of 50 AERCO International, Inc. • 100 Oritani Dr. • Blauvelt, New York 10913 • Phone: 800-526-0288
SPUD
THREADS
SEALING
SURFACE
STEAM RISER OR
CONDENSATE RETURN
SPUD
Figure 13: Preparation of Riser/Return Spuds
10.10. PREPARATION OF COIL ASSEMBLIES
The Coil Assemblies of the Heater must be cleaned, inspected and prepared for
reassembly as follows:
Preparation of Coil Assemblies Instructions
1) Visually inspect all Tail Piece sealing surfaces for cleanliness and evidence of damage.
(Figure 14).
2) Pull the Union Nut forward against the seating surface of the Tail Piece and rotate the Union Nut
several turns to check for any obstructions around the perimeter of the seating surface. (Figure
14).
3) Contact your local AERCO Representative for replacement of the Coil if obstructions prohibit the
rotation of the Union Nut.
4) Using a brass wire brush, clean the internal threads of the Union Nut.
5) Using a citric orange cleaner, spray the area between the Union Nut and Tail Piece. While
pulling the Union Nut forward against the seating surface of the Tail Piece, rotate the Nut to
remove any residue that can cause unneeded friction between the two surfaces.
6) Form the Coil by creating a 1/8” minimum gap between the individual tubes and a 1/8” to 1/4”
gap between the four layers of tubes as shown in Figure 15. Maintain a flat surface on the top
and bottom tube surface of the Coil.