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12.7
MODE 4 & 5: OUTDOOR RESET OPERATION: ADJUST DISPLAY
From the Home display;
1) Press
Display
simultaneously to view the following parameters:
Parameter
Name
Mode
Outdoor
Start
Temperature
Outdoor
Design
Temperature
Boiler Start
Temperature
Boiler
Design
Temperature
Boil Mass
(Mode 5
ONLY)
Differential
Temperature
Parameter Description
Operating mode for the boiler.
NOTE: A complete description of each
mode can be found in section 8.4
Modes of Operation in this manual.
Outdoor starting temperature used in
the reset ratio for the heating system.
Typically set to the desired building
temperature.
Outdoor design temperature used in
the reset ratio for the heating system.
Set to the coldest annual outdoor
temperature in the local area.
Starting water temperature used in the
reset ratio calculation for the heating
system. Typically set to the desired
building temperature.
Boiler design water temperature used
in the reset ratio calculation for the
heating system. Set to the boiler water
temperature required to heat the
building on the coldest annual outdoor
temperature.
Thermal mass of boiler. This
determines interstage delay and
minimum on and minimum off times.
To provide a modulation rate above
and below the Boiler Target
temperature. For example, if the value
o
is 10
F and the Boiler Target is 160
the boiler will begin to modulate at
o
150
F and shut off at 170
23
Parameter Range
Default = 1
35 to 85
(2 to 29
Default = 60
-60 to 50
(-51 to 10
Default = -10
(-23
35 to 150
(2 to 66
Default = 70
70 to 230
(21 to 110
Default = 180
1 to 3
Default = 1
Au, 2 to 42
(Au, -16 to 5
o
F
Default = 10
o
F.
1 to 6
o
F
o
C)
o
F
o
(21
C)
o
F
o
C)
o
F
o
C)
o
F
o
C)
o
F
o
(21
C)
o
F
o
C)
o
F
o
(82
C)
o
F
o
C)
o
F
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