ECS & CXT-E Control Valve Retrofit for SW Double Wall Heaters
Technical Instruction Document
TID-0140_0A
12/30/2014
AERCO International, Inc.
•
100 Oritani Dr.
•
Blauvelt, New York 10913
•
Phone: 800-526-0288
Page 42 of 58
NOTE
External power at 120 to 240 VAC, 50/60 Hz is required to operate the
circuitry contained in the ECS Control Box. Power connections are made
internally by routing the power wiring through the cutout provided on the
right side of the Control Box.
3. If you have the mounting studs, tighten the nuts holding the mounted Control Box to the
studs.
4. Loosen the captive Phillips head screw on the right front portion of the Control Box (Figure
4-9) to open the hinged door.
5. Swing open the door and loosen the captive Phillips head screw at the top of the recessed
panel (Figure 4-10). Swing down the panel to access terminal block TB-2 (Figure 4-11)
6. Circulator Electrical connections:
Observe all applicable codes and safety procedures
when connecting to power supply
. The motor is impedance protected, and does not
require overload protection. Either colored wire from the pump’s capacitor box can be
attached to either colored wire from the control box power supply. There is no “hot” or
“common” wire leading from the capacitor box. Typical installation would be to attach the
white wire to the white (common) power supply wire and either the yellow or blue wire to
the black (hot) power supply wire. The pump cannot run backwards.
7. Feed the external 120v 60 Hz power leads through the cutout in the right side of the ECS
Control Box.
8. Connect the Line, Neutral and Ground leads to the TB-2 terminals shown in Figure 4-11.
9. Close the swing-down panel after the power leads are secured to TB-2. Tighten the
captive screw to secure the recessed panel in the closed position.
10. Check the labels on the Control Box cables and connect them to the following
components:
Label
Connect To:
VALVE ACTUATOR
3-Pin Molex Connector on the Valve Actuator
MIXED INLET TEMP THERMOCOPLE 2-Pin Connector on Thermocouple
OUTLET TEMP THERMOCOPLE
4-Pin Connector on Dual Sensor (Outlet Port)
11. Fill system with domestic tap water – The system must be filled before operating the
circulator. The bearings are water lubricated and should not be allowed to operate dry.
Filling the system will result in immediate lubrication of the bearings. It is always good
practice to flush a new system of foreign matter before starting the circulator.
12. Put the controller in manual and leave it set to the zero (0) position
13. Operate the circulator for 5 minutes immediately after flushing the system to purge
remaining air from the bearing chamber.
14. Refer to Instruction No. HE-111 for start-up procedures.
15. Close the front door of the ECS Control Box and tighten the captive screw to secure it in
place.
