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Reassembly of risers & coil bundle, 1 installing the risers, He-109 – AERCO Coil & Riser Replacement User Manual

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PR2: 04/01/11 Page 11 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

Figure 5: Coil Gasket Preparation

7. Reassembly of Risers & Coil Bundle

Following preparation of all Heater components as described in Section 6, the Heater is ready for

reassembly as described in paragraphs 7.1 through 7.3.

7.1 Installing the Risers


























2 - 3°

Installing the Risers

1) Thread the Steam Riser into the Bottom Head.
2) Tighten the Riser until the center of the Spud is visually lined up to the cast notch on the Bottom Head.
3) Thread the Condensate Riser into the Bottom Head.
4) Tighten the Riser until the center of the Spud is visually lined up to the cast notch on the Bottom Head.
5) If this is a B+ II Water Wizard, thread the Sub-Cooling Coil onto the Condensate Riser, hand tight (ref.

paragraph 7.2). If this is not a B+ II Wizard Bundle assembly, proceed to step 9.

6) Measure the distance between the outside diameter of the Coil to the threaded stud protruding

through the Bottom Head on both sides of the Coil (Figure 6).

7) Position the Condensate Riser to create an equal distance between both measurements shown in

Figure 6.

8) Remove the Sub-Cooling Coil.
9) Thread a Steam Coil onto the Steam Riser, hand tight.
10) Position the Steam Riser so that the Condensate Tailpiece is aligned with the Spud on the

Condensate Riser.

11) Remove the Steam Coil.
12) Insert the properly formed Coil Gaskets into each Spud. Ensure that the Coil Gasket snaps into the

Spud (Fig. 7).

13) If the Coil Gasket is loose in the Spud, remove it and reform the six tabs to create a positive

connection into the Spud.


Section 7.1 Instructions

END