AERCO ECS Retrofit User Manual

Page 10

CAUTION

DO NOT DISCARD ANY OF THE REMOVED PARTS OR ASSEMBLIES
UNLESS IT IS SPECIFICALLY INDICATED THAT THEY WILL NO LONGER
BE USED. IT IS RECOMMENDED THAT ALL REQUIRED ITEMS BE
REMOVED AS INDICATED IN THE FOLLOWING STEPS PRIOR TO
PERFORMING ANY OF THEREPLACEMENT PROCEDURES IN SECTION
3.

2.3 Removal of Components on Top Head Assembly

Virtually all components currently installed in the Water Heater Top Head must be removed prior to
installing the new Electronic Control System and Electronic Valve Actuator. Refer to Figure 2-1, sheet
3 to locate the applicable Top Head components and proceed as follows:

1. Disconnect the pipe drain from the Water Solenoid Relief valve in the Top Head.

2. Disconnect the electrical leads between the Water Solenoid and the Control Box.

3. Remove the 120 VAC Water Solenoid from the nipple connecting it to the Heater Top Head.

This Solenoid will be replaced with a new 24 VDC Solenoid provided in the Retrofit Kit.

4. If a Self-Contained Control Valve is installed with the Heater, remove the Valve’s Temperature

Control Thermal Element from the Thermowell bushing in the Top Head.

5. If a Pneumatic Control Valve is installed with the Heater, remove the Thermal Element and

Bushing.

6. Remove the Dial Thermometer and Thermowell from the Top Head.

7. Remove the Aquastat Capillary and Thermowell from the Top Head.

8. Remove the Anticipator Check Valve (Load Alert) as follows:

(a) Disconnect the union or flange in the hot water outlet piping (located beyond the outside

diameter of the Top Head).

(b) Refer to Figure 2-3. Remove the four hex nuts securing the hot water Outlet Flange to the

Top Head. Remove the Flange, Flange Gasket and outlet piping connected to the Flange.
Retain the four hex nuts for reinstallation of a new Outlet Flange (Section 4).

These removed components will no longer be used. Also, the Outlet Flange and Gasket
will be replaced with new components provided in the Retrofit Kit.