Dunkirk 95M-200 Parameter Manual page 9

• Maximum fan speed can be set separately for space
heating and DHW using Parameters 13 and 15.
PARAMETER 13 (SPACE HEATING MAX. FAN
SPEED):
• Acceptable Range for Natural Gas and LP: 2150
to 4600 rpm (21 to 46 on boiler display).
NOTE: Boiler display shows fan speed in hundreds of rpm. A
value of 48 would mean a speed of 100 x 48, or 4800 rpm.
• Factory Defaults: See the "Default Parameters
Table" in Section II of this manual.
• If the boiler is oversized for space heating, you
can reduce the maximum fan speed during space
heating operation (Parameter 13) to limit the
maximum boiler input.
PARAMETER 15: DHW MAX FAN SPEED
• Acceptable Range for Natural Gas and LP: 2150
to 4600 rpm (21 to 46 on boiler display).
NOTE: Boiler display shows fan speed in hundreds of rpm. A
value of 48 would mean a speed of 100 x 48, or 4800 rpm.
• Factory Defaults: See the "Default Parameters
Table" in Section II of this manual.
• If the boiler is oversized for domestic water
heating, you can reduce the maximum fan speed
during DHW operation (Parameter 15) to limit the
maximum boiler input.
MINIMUM FAN SPEED (PARAMETER 17)
!
The fan speed must not be set below the value
as supplied from the factory (see the "Default
Parameters Table" in Section II). This would
reduce boiler firing rate below the acceptable
limit, resulting in potential for severe personal
injury, death, or substantial property damage.
PARAMETER 17 sets the minimum fan speed. Boiler
firing rate is proportional to fan speed, so increasing
the minimum fan speed increases the minimum firing
rate (low fire).
Parameter 17 sets the minimum fan speed for both
DHW and space heating modes.
• Acceptable Range for Natural Gas and LP: 2150
rpm (21 on boiler display).
!
WARNING
NOTE: Boiler display shows fan speed in hundreds of rpm. A
value of 48 would mean a speed of 100 x 48, or 4800 rpm.
• Factory Defaults: See the "Default Parameters
Table" in Section II of this manual.
BOILER FIRING RATE VS. RPM
% Rate BTUH
40 80,000
50 100,000
60 120,000
70 140,000
80 160,000
90 180,000
100 200,000
NOTE: Results may vary depending on altitude of installation, gas
calorific value, and vent length.
IGNITION FAN SPEED (PARAMETER 19)
!
The fan speed must not be set BELOW the value
as supplied from the factory (see the "Default
Parameters Table" in Section II). This would
reduce boiler firing rate below the acceptable
limit, resulting in potential for severe personal
injury, death, or substantial property damage.
• PARAMETER 19 sets the fan speed during ignition.
Boiler firing rate is proportional to fan speed, so
increasing the minimum fan speed increases the
minimum firing rate (low fire).
IMPORTANT: Parameter 19 should only be changed
where required for high altitude applications.
• Acceptable Range for Natural Gas and LP: 4300
to 4600 rpm (43 to 46 on boiler display).
NOTE: Boiler display shows fan speed in hundreds of rpm. A
value of 48 would mean a speed of 100 x 48, or 4800 rpm.
• Factory Defaults: See the "Default Parameters
Table" in Section II of this manual.
DIFFERENTIAL (HYSTERESIS) SETTINGS
!
Do not change the differentials (hysteresis)
for domestic hot water operation (Parameters
24, 25, 26, and 27). Always use only the factory
default settings for these parameters.
9
RPM
Natural Gas
2150
2500
3000
3300
3875
4075
4600
!
WARNING
!
WARNING
LP Gas
2150
2450
2925
3300
3650
4000
4600