AERCO Innovation (G-14-2265 and above) - Manual (Page 63)

Innovation Water Heaters Installation, Operation & Maintenance Manual
CHAPTER 4 – INITIAL START-UP
OMM-0078_0L
AERCO International, Inc. • 100 Oritani Dr. • Blauvelt, NY 10913
Page 63 of
206
GF-128
Phone: 800-526-0288
PRI: 11/25/2014
4.6.1 Setting the Outlet Water Temperature Setpoint
The setpoint temperature of the unit may be changed using the following steps. However, once a
setpoint has been changed, recalibration may be necessary. The temperature calibration
procedures are provided in sections 4.6.2 and 4.6.3.
To adjust the unit’s setpoint, proceed as follows:
Setting Outlet Water Temperature Setpoint
1. Press the MENU key until Configuration Menu is displayed.
2.
Press the ▲ or ▼ arrow key until Internal Setpt is displayed along with the present setpoint
temperature.
3. To change the setpoint, press the CHANGE key. The display will begin to flash.
4.
Press the ▲ or ▼ arrow key until the desired setpoint is displayed.
5. Press the ENTER key to save the change.
4.6.2 Minimum Load Adjustment
With the unit in operation, check the temperature control at minimum load as follows:
Minimum Load Adjustment
1. While monitoring the VALVE POSITION bar-graph, create a minimum load on the system
that will yield a steady valve position between 25% and 35%.
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 loa
d 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.