1-15
BOILER SYSTEMS AND OPERATION
CONTROLLER MANUAL – SFC/SFB SERIES BOILERS
PARAMETER
DESCRIPTION DEFAULT
RANGE / OPTIONS
P074
Number of ECO
days
7
0-10 Number of past
days the predictive
heat-exchanger
heat-up algorithm
averages over
P075
Supply
Temperature for
external indirect
tank
176° F / 80°C
140°F to 194°F /
60°C to 90°C
P077
Response time
delay for space
heating after
DHW operation
0
0-15 minutes
P081
Setting of three-
way valve or
electric shutoff
valve
0
0 = powered during
Space Heating
demand
1 = powered during
DHW demand and
no demand
2 = powered durning
Space Heating
demand and no
demand
3 = powered during
DHW demand
P089
External tank set
temperature unit
˚C
140° F
Table 3: Information codes
** Smart outdoor reset function
When using a non-modulating room thermostat (on/off), if no outdoor reset
sensor is connected to the boiler it is possible to simulate weather-dependent
heating by activating “smart outdoor reset”.
When “smart outdoor reset” is activated, the setpoint for the supply temperature
is starting at a minimum value (P056), and during heating increases to the
maximum value set by the user.
When the demand for space heating is satisfied, the setpoint for the supply
temperature is lowered in the same way until it reaches the minimum value.
The slope for this modulation can be set with parameter P061. Note that the
value is °C per 100 seconds (*).
(*) Important: The lower the setting the more stable the heating process.
However, it will take longer for rooms to heat up.
