GF-135
Esteem 399 Low NOx Boiler
Chapter 18
OMM-0089_0A
Installation, Operation & Maintenance Manual Controller Operation
Page
167
of
188
AERCO International, Inc.
•
100 Oritani Dr.
•
Blauvelt, NY 10913
OMM-0089_0A
MC1 06/19/14
Ph.: 800-526-0288
18.9.13 DHW Integral Gain (Default: 245)
DHW Integral Gain allows the cascade response to be adjusted for a domestic hot water call.
DHW Integral Gain has the greatest influence when the system temperature is close to the
setpoint. Press the LEFT or RIGHT buttons to adjust the DHW Integral Gain then press the OK
button to store the setting.
Figure 18-64: DHW Integral Gain Menu
Increase DHW Integral Gain:
•
The Cascade System will take longer to reach the setpoint, but setpoint overshooting is
minimized.
•
If the setpoint is reached too quickly, increase the DHW Integral Gain value by 2. Perform
Cascade Auto-detection and initiate a domestic hot water call. Observe the cascade
response and make further adjustments if necessary.
Decrease DHW Integral Gain:
•
The Cascade System will reach setpoint faster, but overshooting the setpoint may occur.
•
To reach the setpoint faster, decrease the DHW Integral Gain value by 2. Perform Cascade
Auto-detection and initiate a domestic hot water call. Observe the cascade response and
make further adjustments if necessary.
NOTE
Only make adjustments to this setting after consulting AERCO
Technical Support. Improper adjustment of DHW Integral Gain
could lead to temperature fluctuations and erratic cascade
operation.
