Minimum Fan Speed; Maximum Fan Speed; Forced Part Load Time; Cycling Prevention Delay Time - DeDietrich 310 ECO Series Installation And Operating Manual

De Dietrich Gas 310/610 ECO
13.2.1 Minimum fan speed ( and )
Parameter , adjustable between 06 and 60 (x100 rpm) parameter , adjustable between 0 and 100 (x 1 rpm).
This setting is only active if setting  has been selected in the boiler control: high/low control (see section
13.1.3). The value relates to the percentage output when the boiler is running at 'low'. The percentage 'high'
position depends on the set maximum central heating speed.
13.2.2 Maximum fan speed (and  )
Parameter adjustable between 10 and 60 (x100 rpm) and parameter  adjustable between 0 and 100 (x 1
rpm).The maximum speed can be limited at a lower value in the software by changing parameters  and .
 Important!! Do not modify these settings, factory settings.
 Important!! Only make changes after consulting DDR Americas Inc. support department.
13.2.3 Forced part load time ()
Parameter adjustable between 0 and 300 seconds. The boiler always starts with a specified output for a certain
time. The boiler can then be sent to the minimum position (20% of output) for a specific period, independent of
the heat demand.
13.2.4 Cycling prevention delay time ()
Parameter () adjustable between 0 and 300 seconds. These values set a minimum off time following a control
stop / end of a heat demand to prevent cycling taking place. When, after this delay time flow temperature lies less
than 9°F [5°C] above return temperature (check °n water flow), the boiler will restart.
13.2.5 Required flow temperature at 0 – 10 volts ( and )
Start point (0 volts): parameter , adjustable between -58
° °
and 122°F [-50 C and +50 C]
This value sets the required flow temperature at 0-volt
signal input. End point (10 volts): parameter ,
adjustable between 124 and 480°F [+51°C and +249°C
this value sets the required flow temperature at 10-volt
signal input (restricted by the maximum flow temperature
set-point and the maximum output).
These settings only apply if boiler control  has been
selected: 'external analog input 0-10V on the basis of
flow temperature'.
13.2.6 Switch point high/low operation signal ()
Parameter , adjustable between 0 and 60 (x100) rpm. This parameter enables setting the switch point between
"low fire" and "high fire." A fan speed below the set value will cause a "low fire" signal. A fan speed above the set
value will cause "high fire" signal. A fan speed above the set value will cause a "high fire" signal. An "ON/OFF"
signal can be obtained by setting parameter  to 60 = 6000 rpm
13.2.7 Shunt pump post-circulation time ()
Parameter , setting  = 10 sec;  = continuous and adjustable between  and  = number of
minutes.
Continuous water circulation is advisable if there is a danger of the heating system freezing up.
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