Remote Summer/Winter Switch; Boiler Target Temperature Setting; Setting The Boiler Target Temperature - Prestige Solo 175 Installation And Maintenance Manual

Start-Up Procedures
play will show "c" followed by CH set point
temperature (Parameter 4) or CH target tem-
perature
Remote Summer / Winter Switch
• A manual summer/winter switch may be
installed in addition to the outdoor sensor.
• This switch prevents the boiler central
heating (CH) circulator from operating dur-
ing a call for heat while in the summer
mode.
Note: The summer mode does not affect
boiler operation during domestic hot
water production or the boiler freeze
protection feature.
• The switch should be oriented to the out-
door sensor terminals on the boiler's 24V
terminal strip (see unit wiring diagram, Fig
20, page 32).
NOTICE
For proper function of the summer/win-
ter switch, the switch should be connect-
ed in parallel to the outdoor sensor, not
in series.
• The switch should be closed during sum-
mer mode. This will create a false outdoor
temperature signal to the boiler control.

Boiler 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 68ºF.
• The boiler target temperature setpoints are
based on outdoor air temperatures between
0ºF and 68ºF and are linearly proportional.
See Graph 1 and Table 3 on page 51 for a
sample setting.

Setting the Boiler Target Temperature

Key: Display
Note: If the boiler has been
tbY
S
operating, the display may show
MODE
the current boiler status on the
left digit followed by the current
boiler temperature.
P ARA
Pressing MODE once
MODE
• Once in the PARA mode of the boiler con-
trol, scroll through the list of parameters by
pressing the STEP button.
NOTICE
Parameter 4 is adjustable from 86ºF to
194ºF. The factory setting is 186ºF.
Adjusting this parameter may 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.
50