48
LP-542 REV. 7.16.15
Minimum Supply Temperature
Sets the design supply water temperature based on the maximum outdoor
design temperature. Minimum supply temperature must be set at least 9
o
F
below the maximum supply temperature.
Range: 40
o
F to (Maximum Supply Temperature - 9
o
F) Default: 86
o
F
This warm weather temperature setting will shut down CH Mode
Range: 50 - 110
o
F
When Outdoor Temperature Mode is used, Boost Function increases the CH
set point temperature by the Boost Degree temperature [10:bd]) at time
intervals (Boost Interval [11:bI]). A space heating demand must be active
without a DHW demand over the Boost Function set period of time (9:bt) for
boost to activate. Boost continues until the boiler reaches the maximum supply
temperature set point (6:cH) based on the outdoor reset curve. The boiler will
return to normal operation after the thermostat is satisfied.
Range: 0 - 120 min
NOTE: “0” means boost function is OFF.
Sets the temperature added to the boiler target set point based on the Outdoor
Temperature Mode reset curve.
Range: 5 - 15F Default: 10F
Sets the interval time when the boiler will increase the temperature by the Boost
Degree. Ex: Initial Boost: 10F. After 20 MIN Interval: Boost will increase CH set
point temperature another 10F. After another 20 MIN Interval: Boost will
increase CH set point temperature another 10F. This will continue until the
boiler reaches the maximum supply temperature set point (6:cH) based on the
outdoor reset curve, or until the thermostat is satisfied.
Range: 0 - 120 MIN Default: 20 MIN
Adjusts Maximum Fan Speed
Range: -30 to +30
Adjusts Minimum Fan Speed
Range: -30 to +30
Reset burner operation time
Select YES to Initialize burner operation time
Range: NO or YES
Select YES to Initialize ignition cycles
Range: NO or YES
This function delays burner operation during CH mode
Range: 0 - 20 min
Set differential temperature to turn
burner “ON”
When set, the appliance will operate to heat CH water when water temperature
falls below a differential setting.
Example: If set point is 180
o
F and differential is 30
o
F, the appliance will turn on
when CH water temperature falls below 150
o
F.
Range: 5 - 30
o
F
Set Heating combustion rate Range: 50 - 100%
Set DHW combustion rate
Range: 50 - 100%
Heating Pump Post-Purge Time,
T/T Satisfied
Allows the user to set the appliance pump post purge time once the thermostat
is satisfied. Range: 1-5 minutes
Indirect Storage Tank
Temperature Set Point
Sets Maximum Indirect storage tank Temperature
Range:95 - 180
o
F
Indirect Storage Tank Differential
Set Point
DHW Differential Set Point
Range: 5-30 F
DHW Pump Post Run Time
Range: 0-10 Min
DHW Priority Timer
Range: 0 – 60 Min
Boiler Supply Indirect Storage
Tank Temperature
Boiler Supply Indirect Tank Temperature
Range: 120 – 180 F
System Freeze Protection Mode
(Activates Based on Internal
Supply Water Temperature)
Freeze Protection Operation
Stage 1 – If control detects water temperature of 46
o
F
(8
o
C) and below, it turns the DHW indirect and CH pumps
On for 600s and Off for 30s. This cycle repeats until the
control detects water temperature of 50
o
F (10
o
C) and
above.
ON or OFF
(Default: ON)
NOTE: If using
boiler for Snow
Melt applications,
turn Freeze
Protection OFF.
Stage 2 – If control detects water temperature of 41
o
F
(5
o
C) and below, it turns the burner on to meet a target
temperature of 104
o
F (40
o
C). The burner and DHW indirect
and CH pumps will run continuously during this stage until
the control detects water temperature of 104
o
F (40
o
C) and
above.
Stage 3 - If control detects water temperature of 34
o
F (1
o
C)
and below, Er: 85 will appear on the display. The control
turns the burner on to meet a target temperature of 104
o
F
(40
o
C). The burner and DHW indirect and CH pumps will
run continuously during this stage until the control detects
water temperature of 104
o
F (40
o
C) and above.
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