AERCO CXT-E Retrofit Kit - Manual (Page 44)

ECS and CXT-E Retrofit Instructions Kit # 27004-TAB
Technical Instruction Document TID-0141_0A
12/30/2014 AERCO International, Inc. • 100 Oritani Dr. • Blauvelt, New York 10913 • Phone: 800-526-0288 Page 44 of 76
FRONT
VERTICAL
SIDE
STRAIN
RELIEF
PADDLE
WHEEL
SHAFT
Figure 4-8. Flow Meter Orientation
4.3.2 Flow Meter Installation For Water-to-Water Double-Wall Heaters
Flow Meter connections for Double-Wall Heater Models WWDW-24, WWDW-45 and WWDW-68
are made on the Shell as shown in Figure 4-7. As with Helitherm Models, Rigid Tubing is used for
the Flow Meter Inlet connection to the Cold Water Inlet and Flexible Tubing is used for the Outlet
connection at the Drain. Flow Meter installation is accomplished as follows:
1. Obtain the Flow Meter, Rigid Inlet Tube, Flexible Outlet Tube and Compression Fittings
from the Retrofit Kit.
2. Attach the Rigid Inlet Tube and Flexible Outlet Tube to the Flow Meter using the fittings
provided in the kit.
3. Next, obtain the 3/4” Close Nipple (9-234) and 3/4 x 1/4 x 3/4” Tee (59032) from the Retrofit
Kit.
4. If installed, remove the 3/4” NPT Plug from the Drain Port on the Heater Shell (Ref. Figure
2-2, sht 1).
5. Install the Close Nipple and Tee in the Drain Port (Figure 4-7)
6. Connect the Flow Meter Outlet Flexible Tubing to the Drain Outlet Tee as shown in Figure
4-7. Connect the Rigid Inlet Tube from the Flow Meter to the Cold Water Inlet using the
compression fitting provided.
7. Position the Flow Meter so that the Paddle Wheel is in the “Vertical” plane as shown in
Figure 4-8.
NOTE
Section 4.4 applies ONLY to Water-to-Water Heater Models which include
E-Plus and Water-to-Water Double-Wall Models. Disregard the
procedures in section 4.4 for ALL Steam-to-Water Heater Models and
proceed directly to section 4.5.