AERCO Innovation (G-13-1854 and above) - Manual (Page 59)

Innovation Water Heaters Installation, Operation & Maintenance Manual
CHAPTER 4 – INITIAL START-UP
OMM-0078_0J
AERCO International, Inc. • 100 Oritani Dr. • Blauvelt, NY 10913
Page 59 of
196
GF-128
Phone: 800-526-0288
PRI: 11/22/2013
Minimum Load Adjustment – Continued
NOTE
It may be desirable to shut off the outlet valve and use the hose bib (see
Figure 2-4) to simulate a minimum flow load condition
.
2. Wait several minutes to allow the outlet temperature to stabilize under load conditions.
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 section 4.6.3. 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 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 outlet water temperature, while decreasing it
will decrease outlet 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 unit’s setpoint.
4.6.3 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.