lp-445-r4 Rev. 006 Rel. 027 Date 7.21.20
45
Function 26
System Freeze Protection
SYS FREEZE PROT
PROTECT OFF 26
NOTE:
This parameter is only
present if the boiler is a cascade
master. Allows the user to set the
freeze protection when a system
pump is used. Factory Default: OFF.
Selection of temperature activates
freeze protection. (Range: OFF,
-40
o
F – 104
o
F).
Function 27
Error System Sensor
ERROR SYSTEM SENS
ON 27
Sets the control to display an error
message if the system sensor is
open or shorted. NOTE: This error
does not stop the boiler (or boilers)
from running. Factory Default: ON
(Range: ON / OFF).
Function 28
Freeze Protection
FREEZE PROTECTION
ON 28
Allows the user to set freeze
protection on the boiler. Factory
Default: ON (Range: ON / OFF).
Function 29
DHW Modulation Mode
DHW MODULATE MODE
NORMAL MOD 29
This parameter controls how
the boiler modulates for a DHW
demand. In NORMAL MOD mode,
the boiler will modulate down
from high fire when there is a DHW
demand. In LOW MOD mode, the
boiler will modulate up from low
fire when there is a DHW demand.
This mode is useful to minimize
short cycling when a large boiler
and small indirect tank are used
together. Factory Default: NORMAL
MOD (Range: NORMAL MOD / LOW
MOD).
Function 30
Extra Heater Mode
EXTRA BOILER MODE
OFF 30
Allows for a non HTP boiler to
be controlled when the cascade
output has risen above the percent
of the cascade firing rate set in this
parameter. Factory Default: Off
(Range: 50% - 100%).
Function 31
System Sensor Mode
SYSTEM SENSOR MODE
OFF 31
Suppresses the ‘NO FOLLOWER’
display message if the boiler is used
as a cascade master boiler with no
follower boilers connected. Factory
Default: OFF (Range: ON / OFF).
Function 32
Service Schedule
SERVICE SCHEDULE
OFF 32
Selects a service date or time based
on the boiler run hours to program
the boiler maintenance schedule.
Factory Default: OFF (Range: Date or
Run Hours). NOTE: Without setting
this function, Functions 33/34/35/36
will not display.
Function 37
Modbus Mode
MODBUS MODE
OFF 37
Enables Modbus Mode on the
appliance. Factory Default: OFF
(Range: OFF, ON, AUTO). NOTE:
Turning Modbus Mode “ON” will
open a number of additional
parameters to customize
Modbus installation. See Modbus
Instructions (lp-372) for details.
NOTE: Turning this Mode “ON”
without a connected and powered
Modbus communication adapter
(p/n 7350P-629) will result in
improper appliance operation.
Service calls associated with this
ARE NOT covered by warranty.
Table 20 - System Setting Program Navigation
NOTE:
For the following functions, you must have your
maintenance function turned on.
To change these functions, press
ENTER
. The left most digit will
begin to blink. Use the
^
or
v
arrows to change the digit. Use the
< >
arrow keys to switch between digits. When you’ve made your
selection, press
ENTER
again.
Screen
Description
Function 33
Year
SERVICE SCHEDULE
YEAR 00/00/2000 33
Allows the user to set the year of the
next service reminder.
Hours
SERVICE SCHEDULE
10000’s 00
00
0000 33
Allows the user to set the left two
digits of the amount of run hours
before next service reminder.
Function 34
Month
SERVICE SCHEDULE
MONTH 00/00/2000 34
If the date function was selected, this
function programs the month. If you
selected the run hour function, you
will need to program 10,000 hours, if
required.
Hours
SERVICE SCHEDULE
10000’s 0000
00
00 34
Allows the user to set the middle two
digits of the amount of run hours
before next service reminder.
Function 35
Day
SERVICE SCHEDULE
DAY 00/00/2000 35 Sets the day of next service reminder.
Hours
SERVICE SCHEDULE
10000’s 000000
00
35
Sets the two right digits of the amount
of run hours for the next service
reminder.
Function 36
Telephone
TELEPHONE #
000 000 0000 36
Allows the user to input a telephone
number that will display when
maintenance is required.
Table 21 - Maintenance Reminder Function Screens
