18
required operating temperatures for the application. To
configure the MCBA control to react based on the output
signal of an external controller Parameter 34 must be
revised accordingly and any corresponding parameters
will be defined in detail in later sections.
Parameter Adjustment
The parameter adjustment of Parameter 34 in the CODE
mode is done by following the steps given in Program
Access Section on page 2 until the display shows
P_34
. Use the + or - to adjust to the revised setting,
listed below and press STORE to save the setting.
For additional parameter setting, which relate to CH type
0 - 10V External Capacity with AM4 Interface reference:
-
Boiler Operating Temperature High Limit
(Parameter 4) on page 15
-
Boiler Operating Temperature Low Limit
(Parameter 5) on page 15
Boiler Operational Function Options:
-
Burner and CH Circulator Function Options
(Parameter 3) on page 19 through 21
-
CH Circulator Post Operation (Parameter 20) on
page 24.
-
CH Heat Request Blocking Time (Parameter 28)
on page 25.
CH APPLICATION FUNCTION SETTING - 0
TO 10V EXTERNAL TEMPERATURE WITH
AM4 INTERFACE
This application is generally for multiple boilers in which
there is an external boiler control to stage the boilers and
control the burner modulation. In this application the
external controller will control the burner modulation
based on the system temperature requirements.
The external controller will provide a 0 to 10V analog
input to the Prestige based on the system temperature
to meet the load requirements. An analog input of 0V
will indicate the minimum system temperature of 32
º
F
and an analog input of 10V relates to a maximum sys-
tem temperature of 212
º
F.
Because these tempera-
tures are outside the normal operating limits of the
Prestige, the minimum and maximum system tem-
perature must be set using Parameter 4 and 5
. The
actual function of the external controller will vary from
manufacturer to manufacturer.
To operate the Prestige under this application mode,sev-
eral parameters must be revised to establish the
required operating temperatures for the application. To
configure the MCBA control to react based on the output
signal of an external controller Parameter 34 must be
revised accordingly and any corresponding parameters
will be defined in detail in later sections.
Parameter Adjustment
The parameter adjustment of Parameter 34 in the CODE
mode is done by following the steps given in Program
Access Section on page 2 until the display shows
P_34
. Use the + or - to adjust to the revised setting,
listed below and press STORE to save the setting.
For additional parameter setting, which relate to CH type
0 - 10V External Capacity with AM4 Interface reference:
Boiler Operating Temperature:
-
Boiler Operating Temperature High Limit
(Parameter 4) on page 15.
-
Boiler Operating Temperature Low Limit
(Parameter 5) on page 15.
Boiler Operational Function Options:
-
Burner and CH Circulator Function Options
(Parameter 3) on page 19 through 21.
-
CH Circulator Post Operation (Parameter 20) on
page 24.
-
CH Heat Request Blocking Time (Parameter 28)
on page 25.
Parameter
Factory Setting
Revised Setting
P_34
00
05
Parameter
Factory Setting
Revised Setting
P_34
00
04
