Service manual

28
9.7 MODE 4 & 5: OUTDOOR RESET OPERATION: ADJUST DISPLAY
From the Home display;
1) Press simultaneously to view the following parameters:
Display Parameter Name Parameter Description
Parameter
Range
Mode
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.
1 to 8
Default = 1
Outdoor Start
Temperature
Outdoor starting temperature
used in the reset ratio for the
heating system. Typically set to
the desired building temperature.
35 to 85
o
F
(2 to 29
o
C)
Default = 60
o
F
(21
o
C)
Outdoor Design
Temperature
Outdoor design temperature used
in the reset ratio for the heating
system. Set to the coldest annual
outdoor temperature in the local
area.
-60 to 50
o
F
(-51 to 10
o
C)
Default = -10
o
F
(-23
o
C)
Boiler Start
Temperature
Starting water temperature used
in the reset ratio calculation for
the heating system. Typically set
to the desired building
temperature.
35 to 150
o
F
(2 to 66
o
C)
Default = 70
o
F
(21
o
C)
Boiler Design
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.
70 to 230
o
F
(21 to 110
o
C)
Default = 180
o
F
(82
o
C)
Differential
Temperature
To provide a modulation rate
above and below the Boiler
Target temperature. For example,
if the value is 10
o
F and the Boiler
Target is 160
o
F the boiler will
begin to modulate at 155
o
F and
shut off at 165
o
F.
Au, 2 to 42
o
F
(Au, -16 to 5
o
C)
Default = Au
Pump Delay
Boiler post pump time after
burner has shut off, in seconds.
OFF, 0:20 to
9:55 min, On
Default = 1:00
min