22
4-20mA/ 0-10Vdc Setpoint Operation (Standalone)
Description
Electrical Connection(s)
Programming Instructions
•
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.
1)
Place toggle switch to
LOCAL
2)
Press
and
3)
Press
[CH
– Central Heat Configuration]
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)
4-20mA/ 0-10Vdc Firing Rate Operation (Standalone)
Description
Electrical Connection(s)
Programming Instructions
•
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.
1)
Place toggle switch to
LOCAL
2)
Press
and
3)
Press
[CH
– Central Heat Configuration]
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)
Содержание Valiant-FT II Series
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Страница 42: ...38 Figure 42 Single Boiler with DHW Tank Hydronic Heating Zoned Piping...
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