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4-20mA/ 0-10Vdc Setpoint Operation (Standalone)
Description
•
Boiler operates with
variable setpoint
determined by 4-
20mA incoming
signal
•
Modulates on boiler
outlet sensor (default)
•
Heat demand is
generated when inlet
temperature drops
below setpoint minus
on hysteresis and 4-
20mA or 0-10Vdc
signal is present.
•
If set to local enable
constant pumping is
required
•
For remote enable
intermittent pumping
is allowed.
4-20mA/ 0-10Vdc Firing Rate Operation (Standalone)
Description
•
Boiler operates with
variable firing rate
determined by 4-
20mA incoming signal
•
Modulates on boiler
inlet sensor (default)
•
Heat demand is
generated when inlet
temperature drops
below setpoint minus
on hysteresis and 4-
20mA or 0-10Vdc
signal is present.
•
If set to local enable
constant pumping is
required
•
For remote enable
intermittent pumping
is allowed.
Electrical Connection(s)
Electrical Connection(s)
Programming Instructions
1)
Place toggle switch to LOCAL
2)
Press
and
Press [CH – Central Heat Configuration]
3)
4)
Press the
to arrive at Setpoint
5)
Select Setpoint Source = S2 (J8-6) 4-20mA
6)
Select 4mA water temperature
7)
Select 20mA water temperature
8)
Place toggle switch to REMOTE for remote operation (if required)
Programming Instructions
1)
Place toggle switch to LOCAL
2)
Press
and
Press [CH – Central Heat Configuration]
3)
4)
Press the
to arrive at Modulation
5)
Select Modulation Rate Source = S2 (J8-6) 4-20mA and burner
on/off
6)
Place toggle switch to REMOTE for remote operation (if required)
22
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