AERCO SWDW68 U-Tube Double-Wall Heaters w/ECS - Manual (Page 36)

HE-
111 − OPERATION
Rev B Mar 2013 5-2
TEMP CONTROLLER
HOLD
RUN AUTO
MAN
2408
PT.NO.
OVER TEMP SWITCH
PANEL
DOOR
OVER-TEMP
SWITCH
TEMPERATURE
CONTROLLER
POWER
SWITCH
[
WATER TEMPERATURE AT
HOT WATER OUTLET
SETPOINT TEMPERATURE
Figure 5-1. Control Box
9. Referring to Figure 5-2, press the AUTO/MAN pushbutton to toggle the AUTO/MAN display to the
MAN (Manual) mode. The MAN indicator will light.
AUTO RUN
MAN HOLD
OP 1 OP 2
SP2 REM
2408
UPPER DISPLAY
LOWER DISPLAY
AUTO/MAN MODE
INDICATORS
AUTO/MAN
PUSHBUTTON
OP1 INDICATOR
ARROW
BUTTONS
Figure 5-2. Temperature Controller
10. The upper display will continue to show the current heat exchanger outlet water temperature, and the
lower display will show the position of the CXT-E Control Valve Actuator in %. When the Manual
mode is initially selected, the lower display will show 0%, indicating that the Control Valve is fully
closed.
11. Using the
▲ arrow button, set the CXT-E Control Valve to the 10% position and monitor the heat
exchanger Hot Water Output water temperature.
12. Continue to open the valve further in 5% increments until the Hot Water Output temperature begins to
increase at a moderate rate.
13. When the Hot Water Output water temperature has increased to within 20°F of the desired setpoint,
press the AUTO/MAN button to set the Temperature Controller to the AUTO mode. The AUTO
indicator will light and the MAN indicator will go off. When the Temperature Controller is in the AUTO