AERCO Electronic Controls System (ECS) - Manual (Page 38)

Electronic Control System (ECS) and Type CXT-E Valve
6. ROUTINE MAINTENANCE
Page 38 of 82
AERCO International, Inc. • 100 Oritani Dr. • Blauvelt, New York 10913 • Phone: 800-526-0288 VD2: 02/28/14
OMM-0003_0D AC-105
5) After cleaning, reassemble the Flow Sensor as follows:
IMPORTANT NOTE!
Ensure that the paddle wheel magnets are installed facing the
internal wall of the Flow Sensor. If not correctly installed, the Sensor
will not function properly.
a) Reinstall the paddle wheel.
b) Apply a thin film of silicone grease on the O-ring in the groove of the clear
polycarbonate window.
c) Reinstall the polycarbonate window.
d) Reinstall the snap-ring.
6) After the Flow Sensor has been reassembled, reinstall the Sensor. Tighten the strain relief
and connect the electrical connector.
6.4 HEAT EXCHANGER ROUTINE MAINTENANCE CLEANING
AERCO recommends that the heat exchanger of the unit be cleaned annually using a solution
of Hydroskrub and water. Hydroskrub is distributed by AERCO International, Inc. and is
designed to dissolve the toughest water scale, lime, mud and rust deposits from virtually any
type of water-based equipment.
NOTE:
The following cleaning procedure applies to all sizes WWDW and
SWDW Heaters. For Helical Coil Type Water Heaters, refer to the
applicable manuals listed in Section 1, page 1-8 of this document for
cleaning/descaling procedures.
CAUTION
Please review MSDS, specifications, and our website
www.aerco.com for additional information, or call technical
service at (800) 526-0288.
CAUTION
Do not drain the unit without venting the shell! A vacuum in the
unit may displace the liner causing serious damage not covered
by warranty.
6.4.1 Pumping System Set-Up Instructions:
Refer to the sample pumping set-up diagram shown in Figure 6-3 for a Double-Wall Heat
Exchanger. For Helical Coil Heaters, refer to the applicable manuals listed in Section 1,
paragraph 1.4.
1) Turn off the water heater and close the inlet and outlet isolation valves.
2) Drain at least half of the water-side volume from the heat exchanger. The amount of water
drained will depend on the size of the heater.
3) Prepare a 50% solution of Hydroskrub and clean water. The amount of the solution should
be approximately equal to the full volume of water that the heat exchanger holds.
4) Close the drain valve and connect a suitable size bucket and pump to the unit drain as
shown in Figure 6-3.
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