24
Once the request for heat is completed the system tem-
perature setting will decrease by 2
º
F per minute until the
calculated system temperature is met. If a second call
for heat is generated it would operate at the current sys-
tem operating temperature based on the amount of
Boost temperature at 18
º
F / Parameter 11 minus the
amount of decrease of 2
º
F/minute since the completion
of the first heat request.
Parameter Adjustment
To revise the Boost feature setting adjustment of
Parameter 11 in the CODE mode is done by following
the steps given in Program Access Section on page 2
until the display shows
P_11.
Use the + or - button to
adjust to the revised setting and press STORE to save
the setting.
The factory setting of 00 is the
OFF
position of the Boost
feature. With this setting the Boost feature is not
applied.
CH OPERATION OPTIONS - PARALLEL
SHIFT (SETBACK FEATURE)
When the application is using an outdoor sensor to
establish a system operating temperature curve and the
heat request, a Parallel shift can be applied as a setback
feature.
The Parallel Shift is applied when the Room Thermostat
contacts on the Prestige are “open”. In the application of
Heat Request - Using Outdoor Sensor
(Parameter 34)
on page 16, the burner is modulating to maintain a system
temperature and the CH circulator is circulating through
the system. When the Room Thermostat contacts “open”,
the calculated system temperature will decrease the
amount of the Parallel Shift in Parameter 12.
Parameter Adjustment
The parameter adjustment for Parallel Shift is Parameter
12. Follow the steps given in Program Access Section
on page 2 until the display shows
P_12
. Release the
STEP button and display should show the factory default
setting. Use the + or - button to adjust to the revised set-
ting and press STORE to save the setting.
BOILER CH APPLICATION PUMP SETUP
At the completion of a CH request for heat the amount of
time for post pump activity can be determined. The post
pump feature allows the stored heat within the boiler to
be absorbed in the system piping to gain additional effi-
ciency from the boiler.
The MCBA Control has a minimum 10 second
post pump cycle. There is no setting on
Parameter 20 that deactivates this post pump
cycle. A parameter setting of 00 is the minimum
setting.
Parameter Adjustment
The parameter adjustment for CH Post Pump Activity is
Parameter 20. The parameter setting is a unit of time
defined in minutes. Follow the steps given in Program
Access Section on page 2 until the display shows
P_20
Release the STEP button and display should show the
factory setting. Use the + or - button to adjust to the
revised setting and press STORE to save the setting.
NOTICE
Parameter
Factory
Setting
Minimum
Setting
Maximum
Setting
12
00ºF
00ºF
144ºF
Parameter
Factory
Setting
Minimum
Setting
Maximum
Setting
20
01
minutes
00
10 seconds
99
minutes
Parameter
Factory
Setting
Minimum
Setting
Maximum
Setting
11
00
0
30
