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3 preparation of coil assemblies, He-109, Figure 3: coil assembly preparation – AERCO Coil & Riser Replacement User Manual

Page 9: Preparation of coil assemblies

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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