Centurion Water Heater- Edge [ii]: Install-Operation-Service
SECTION 5: INITIAL START-UP
OMM-0153_A
• 8/25/2022 Technical Support • (800) 526-0288 • Mon-Fri, 8 am - 5 pm EST Page 51 of 131
Setting Outlet Temperature Setpoint
– Standalone Units:
1. On a standalone unit, go to:
Advanced Setup
→
Unit
→
Application Configuration.
2. The setpoint for the WHM Cascade can be a constant, or received from a remote
source, such as a BAS.
If Operating Mode = Constant Setpoint:
Set WHM Setpoint to the desired setpoint.
If Operating Mode = Remote Setpoint:
Choose the source of the remote setpoint:
•
4-20 mA
•
1-5 V
•
BAS (Building Automation System)
•
0-20 mA
•
Network
•
0-5 V
5.5.2 Minimum Load Adjustment
With the unit in operation, check the temperature control at minimum load as described below.
1. Go to:
Advanced Setup
→
Performance
→
Temperature Control
→
FFWD Settings.
Figure 5-12: FFWD Settings Screen
2. Set the
Outlet Feedback
parameter to
No
.
3. 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 drain valve on the water
inlet pipe to simulate a minimum load condition.
4. Wait several minutes to allow the outlet temperature to stabilize under load conditions.
5. Once stabilized, the outlet temperature should be within 3°F
of the unit’s setpoint.
6. If the outlet temperature is stabilized, proceed to Section 5.5.3:
Maximum Load Adjustment
.
If the temperature is not stabilized, proceed to step 7.
7. Raise or lower the
Min Load Adj
by one or two degrees (
increasing
it will
increase
outlet
water temperature), then allow a few minutes for the system to stabilize.
8. Repeat step 7 as needed until the temperature is stabilized within 2-3 °F (1.1 to 1.65 °C) of
the unit’s setpoint.
9. Proceed to Section 5.5.3:
Maximum Load Adjustment.
