Innovation - Edge [i] Installation, Operation, Maintenance Manual
CHAPTER 8
– WATER HEATER MANAGEMENT
OMM-0143_A
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9/6/2019
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Figure 8.6-3: Application Configuration Screen
The remaining WHM parameters are in
Main Menu
→
Advanced Setup
→
WHM Cascade
→
Operating Controls
.
TABLE 8-6d: Operating Controls
→
Sequencing Control Parameters
Menu Item Display
Available Choices or Limits
Default
Minimum
Maximum
Low Flow Mode
Off
,
On - Outlet Temp
or
On - Avg
Temp
Off
If either “On” option is chosen, WHM monitors the multi-unit system to detect if a “low-flow”
condition exists. If it does exists, WHM slowly shuts down one unit at a time in an attempt to
raise the Fire Rate of the remaining units. If the low-flow condition persists, and only a single
unit remains ignited, WHM will use the
“Outlet Temperature Sensor” of the remaining ignited
unit to control the temperature. The Outlet Temperature Sensor is mounted in the individual
unit and drastically increases the response time to precisely control temperature.
Low Flow Threshold
10%
35%
25%
For low flow applications, this parameter allows the unit to operate without excessive cycling.
This parameter specifies the valve position below which the unit plant will enter this mode
Next On Valve Pos
16%
100%
50%
Determines the valve position that triggers the next unit to come on line
Next Off Valve Pos
16%
100%
25%
Determines the valve position that triggers the next unit to come off line.
WHM Max Units
1
16
16
The maximum number of units that will fire. For example: if there are 5 units, but this setting is
set to 3, the plant will not fire more than 3 units.
Valve Close Delay
0
15
1 min.
The time an open Isolation Valve will remain open once a unit has cycled off. When an ignited
unit is cycled off, its Isolation Valve will remain open for the specified time to dissipate residual
heat.
WHM Fire Rate Up
1
120
20 sec.
Controls the frequency of updates made to the Fire Rate sent to all units. This feature can be
used to slow down the rate of change of the Fire Rate of the WHM System.