AERCO Coil & Riser Replacement - Manual (Page 9)

PR2: 04/01/11 Page 9 of 16 AERCO International, Inc. • 100 Oritani Dr. • Blauvelt, New York 10913 • Phone: 800-526-0288
Coil/Riser Replace Instructions for Helitherm Water Heaters
Technical instructions TID-0038_0A
HE-109
6.3 Preparation of Coil Assemblies
SEE
DETAIL ‘A’
0
DETAIL ‘A’
TAILPIECE
SEATING
SURFACE
UNION
NUT
SEALING
SURFACE
BOX
HEADER
Figure 3: Coil Assembly Preparation
Preparation of Coil Assemblies
1) Visually inspect all Tail Piece sealing surfaces for cleanliness and evidence of damage.
(Figure 3).
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 3).
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 4. Maintain a flat surface on the top and bottom
tube surface of the Coil.
Section 6.3 Instructions
END