AERCO CXT-E Retrofit Kit - Manual (Page 12)

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 12 of 76
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).
(c) Remove the Spring Plate Assembly, Spring and Valve Plug Assembly from the Load
Alert. 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.