User Manual

RECON Water Heaters Installation, Operation & Maintenance Manual
CHAPTER 4 – INITIAL START-UP
OMM-0103_0A AERCO International, Inc.  100 Oritani Dr.  Blauvelt, NY 10913 Page 65 of 178
GF-147 Phone: [phone] PRI: 10/28/2014
4.4.3 Maximum Load Adjustment
Check the temperature control at maximum load as follows:
Maximum Load Adjustment
1. While monitoring the VALVE POSITION bar-graph, 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 water temperature to stabilize under load conditions.
3. Once 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 temperature 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 unit’s setpoint.
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 into service, be sure to set the Outlet Feedback option
in the Tuning Menu back to ON.