AERCO KC Series Equipped with C-More version 3.04 - Manual (Page 39)

INITIAL START-UP
4-9
3. Once stabilized, the OUTLET TEMPERATURE display should read no more than 2 to 3 degrees
above the unit’s setpoint.
4. If the outlet temperature is stabilized, proceed to the Maximum Load Adjustment procedure in
paragraph 4.6.3. If the unit is not stabilized, proceed to step 5.
5. Press the MENU key and select the Tuning Menu.
6. Press the ▲ or ▼ arrow key until Min Load Adj is displayed.
7. Press the CHANGE key. The display will begin to flash.
8. Raise or lower the minimum load adjustment in increments of one or two using the ▲ or ▼ arrow key.
Increasing this value will increase the outlet water temperature, while decreasing it will decrease the
water temperature.
9. Press ENTER to save the change. Allow time for the system to stabilize between adjustments
10. Repeat steps 5 through 9 as needed until the temperature is stabilized at no more than 2 to 3 degrees
above the setpoint.
4.6.3 MAXIMUM LOAD ADJUSTMENT
Check the temperature control at minimum load as follows:
1. While monitoring the VALVE POSITION display, create a maximum load on the system that will yield
a steady valve position between 80% and 90%.
NOTE:
It may be necessary to open the outlet valve if it was closed during minimum load adjustment to obtain a
sufficient flow rate for maximum adjustment.
2. Wait several minutes to allow the outlet temperature to stabilize under load conditions.
3. Once the temperature has stabilized, the OUTLET TEMPERATURE display should read no more
than 2 to 3 degrees below the unit’s setpoint.
4. If the outlet temperature is stabilized, no adjustment is necessary. If the unit is not stabilized, proceed
to step 5.
5. Press the MENU key and select the Tuning Menu.
6. Press the ▲ or ▼ arrow key until Max Load Adj is displayed.
7. Press the CHANGE key. The display will begin to flash.
8. Raise or lower the maximum load adjustment using the ▲ or ▼ arrow key. Increasing this value will
increase outlet water temperature, while decreasing it will decrease water temperature.
9. Press ENTER to save the change. Allow time for the system to stabilize between adjustments
10. Repeat steps 5 through 9 as needed until the temperature is stabilized 2 to 3 degrees below the
setpoint.
11. If the outlet temperature does not maintain setpoint after a reasonable amount of time and adjustment,
contact your local AERCO representative.
NOTE:
After performing Temperature Calibration and prior to placing the water heater in service, be sure to turn
the Outlet Feedback option in the Tuning Menu back to ON.