Innovation Water Heaters Installation, Operation & Maintenance Manual
CHAPTER 4 – INITIAL START-UP
Page
64
of
216
AERCO International, Inc.
•
100 Oritani Dr.
•
Blauvelt, NY 10913
OMM-0078_0M
09/11/2015
Phone: 800-526-0288
GF-128
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 F (1.1 to 1.65 degrees C) 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 F (1.1 to 1.65 degrees C) above the unit’s setpoint.