Manual

50
Outdoor Reset Control
Boiler CH Target Temperature Setting
• The boiler will default to the boiler target
temperature as defined in Parameter 4
when the outdoor sensor is not connected.
The boiler control will modulate the firing
rate to maintain this target temperature.
• The boiler will operate between the target
temperature as defined in Parameter 4 and
a minimum boiler temperature of 86ºF.
• The boiler control will automatically detect
the presence of the outdoor sensor once it is
connected to the outdoor sensor terminals
on the 24V terminal strip (see unit wiring
diagram, Fig. 20, page 32).
• With the outdoor sensor present, the boiler
target temperature will default to a temper-
ature as defined by the outdoor air reset.
As the outdoor temperature drops the boil-
er target temperature will increase.
• The boiler target temperature defined in
Parameter 4 is the maximum boiler temper-
ature when the outdoor air temperature is at
or below 0ºF.
• The boiler minimum temperature setting of
86ºF will occur when the outdoor tempera-
ture is at or above 64ºF.
• The boiler target temperature setpoints are
based on outdoor air temperatures between
0ºF and 64ºF and are linearly proportional.
See Graph 1 and Table 3 on page 51 for a
sample setting.
Setting the Boiler CH Target Temperature
• Once in the PARA mode of the boiler con-
trol, scroll through the list of parameters by
pressing the STEP button.
Parameter 4 is adjustable from 86ºF to
194ºF. The factory setting is 186ºF.
Adjusting this parameter will affect the
performance of the boiler.
• Once Parameter 4 is displayed, use the + or
- button to modify the parameter setting.
• Once the desired parameter setting is
reached press STORE to save the value.
The display will flash once to confirm the
data has been stored.
• To activate the stored parameter value,
press MODE twice to return to the STBY
mode.
NOTICE
tb
Y
S
M
ODE
AR
A
P
MODE
Key:
D
isplay
Note: If the boiler has been
o
perating, the display may show
the current boiler status on the
left digit followed by the current
boiler temperature.
P
ressing MODE once