AERCO ECS Retrofit - Manual (Page 43)

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NOTE
Paragraph 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
paragraph 4.4 for ALL Steam-to-Water Heater Models and proceed directly to
paragraph 4.5.
4.4 Boiler Water Inlet and Outlet Temperature Sensors – (Water-to-Water Heaters)
If the Water Heater being retrofitted is an E-Plus or a Water-to-Water Double-Wall, two additional
Temperature Sensors (Type J Thermocouples) must be added. These are the Boiler Water Inlet
Temperature Sensor and Boiler Water Outlet Temperature Sensor. For E-Plus (Helitherm) Heaters,
the Inlet and Outlet Sensors are mounted in the Bottom Head and Top Head, respectively as shown in
Figure 4-9. For Water-to-Water Double-Wall Heaters, the Boiler Water Inlet and Outlet Temperature
Sensors are mounted at the locations shown in Figure 4-10.
These two additional Temperature Sensors are identical (part no. 61009-1) and therefore can be
installed in either location.
4.4.1 E-Plus Water Heaters
Refer to Figure 4-9 and install the Boiler Water Inlet and Outlet Sensors as follows:
1. Check to ensure that the capillary tubes and compression fittings have been removed from the
Boiler Inlet and Outlet Valve Spool Piece Assemblies shown in Figure 4-9. If they have not
been previously remove, disconnect and remove these items at this time.
2. Install the Boiler Water Inlet Temperature Sensor in the tapped opening in the Valve Spool
Piece Assembly which connects to the Boiler Water Inlet on the Bottom Head Heater.
3. Install the Boiler Water Outlet Temperature Sensor in the tapped opening in the Valve Spool
Piece Assembly which connects to the Boiler Water Outlet on the Top Head of the Heater.
4. The electrical connector plugs on the Inlet and Outlet Boiler Water Temperature Sensors will
be connected after the ECS Control Box is installed (paragraph 4.5).