21
If any other type of NTC / outdoor sensor is used,
ensure the sensor is rated for 12k resistance.
Failure to comply with this requirement will result
incorrect outdoor temperature readings and boil-
er operating temperature.
In this application the coldest design temperature day
can be determined and set along with the warmest
design temperature day. These 2 settings in conjunction
with the system minimum and maximum operating tem-
peratures (Parameters 4 and 5) will create the system
operating curve.
The Prestige with an outdoor sensor can respond to a
request for heat through the outdoor sensor or through a
room thermostat. To configure the MCBA control to
react based on the outdoor temperature or room ther-
mostat Parameter 34, see pages 15 through 17, must be
revised accordingly and any corresponding parameters
as defined in detail in later sections.
OUTDOOR TEMPERATURE - MINIMUM
SETTING
Parameter Adjustment
To revise the coldest design temperature day adjustment
of Parameter 6 in the CODE mode is done by following
the steps given in Program Access Section on page 2 until
NOTICE
the display shows
P_06
. Use the + or - to adjust to the
revised setting and press STORE to save the setting.
OUTDOOR TEMPERATURE - MAXIMUM
SETTING
Parameter Adjustment
To revise the warmest design temperature day adjust-
ment of Parameter 7 in the CODE mode is done by fol-
lowing the steps given in Program Access Section on
page 2 until the display shows
P_07
. Use the + or - to
adjust to the revised setting and press STORE to save
the setting.
Parameter
Factory
Setting
Minimum
Setting
Maximum
Setting
6
00ºF
(-)04ºF
50ºF
60
100
80
60
40
20
-20
0
80
100
120
140
160
180
3
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3
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3
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,
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Fig. 2: Setting the Outdoor Temperature Limits
Parameter
Factory
Setting
Minimum
Setting
Maximum
Setting
7
64ºF
60ºF
78ºF