AERCO Coil & Riser Replacement - Manual (Page 11)

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