cascade Settings
35
0
6
0
CH or DHW Boilers
cH or dHW Boilers
default: 0
The CH or DHW Boilers setting specifies how many boilers in a Split
Cascade System will respond to a domestic hot water call. The CH or
DHW Boilers always include the Master boiler. The remaining boilers
will only respond to central heating calls. This allows the Cascade
System to satisfy both central heating and domestic hot water calls at the
same time. At the completion of a domestic hot water call, the CH or
DHW Boilers will again be available to respond to central heating calls.
Press the
LEfT
or
RIGHT
buttons to adjust the CH or DHW Boilers
setting then press the
oK
button to store the setting.
Splitting the cascade System into cH only and cH or dHW boilers
requires the boilers to be piped as shown in figure 10, page 30. The
cH or dHW boilers must be piped to both cH and dHW loads
directly for proper operation.
dHW Priority must be set to Enabled in dHW Settings of the
cascade Master for proper operation.
all cH or dHW Boilers will respond to a domestic hot water call. It
is important that the domestic load is capable of transferring all of
the heat generated to prevent excessive boiler cycling.
cH Proportional Gain
default: 10
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.
•
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 Autodetection and initiate a cen-
tral heating call. Observe the cascade response and make fur-
ther 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 Autodetection
and initiate a central heating call. Observe the cascade response
and make further adjustments if necessary.
NOTICE
NOTICE
NOTICE
1
255
10
CH Proportional Gain
