AERCO Esteem Boiler with EZ-Set Controller - Manual (Page 164)

GF-135 Esteem 399 Low NOx Boiler
Chapter 18
OMM-0089_0A Installation, Operation & Maintenance Manual Controller Operation
18.9.10 CH Proportional Gain (Default: 7)
CH Proportional Gain allows the cascade response to be adjusted for a central heating call. CH
Proportional Gain has the greatest influence when the system temperature is far away from the
setpoint. Press the LEFT or RIGHT buttons to adjust the CH Proportional Gain then press the
OK button to store the setting.
Figure 18-61: CH Proportional Gain Menu
Increase CH Proportional Gain:
• The Cascade System will reach setpoint faster, but overshooting the setpoint may occur.
• To reach the setpoint faster, increase the CH Proportional Gain value by 2. Perform
Cascade Auto-detection and initiate a central heating call. Observe the cascade response
and make further adjustments if necessary.
Decrease CH Proportional Gain:
• The Cascade System will take longer to reach the setpoint, but setpoint overshooting is
minimized.
• If the setpoint is reached too quickly, decrease the CH Proportional Gain value by 2.
Perform Cascade Auto-detection and initiate a central heating 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 CH Proportional Gain
could lead to temperature fluctuations and erratic cascade
operation.
Page 164 of 188 AERCO International, Inc. • 100 Oritani Dr. • Blauvelt, NY 10913 OMM-0089_0A
MC1 06/19/14 Ph.: 800-526-0288