VOLTMAX ELECTRIC BOILER Installation and Operation Manual
(
Revised August 2017)
, Page
32.
4.3.3 PUMP SETTING
Configuring pump contact activation
(Available only on SCR model)
The system allows the control of up to two
pumps. Each of these pumps can be activated
using a contact. Each pump can be activated
according to different modes.
If the amperage of each of the pumps exceeds
3A
, external pump relays must be used.
Pump Configuration Options
On W1 Dem.
Contact of pump 1 is activated
only when there is a demand
on W1.
On W2 Dem.
Contact of pump 2 is activated
only when there is a demand
in W2.
Priority over
P1
When there is a request on
W2, contact of pump 2 is
activated and contact of pump
1 is deactivated.
Always On
The selected pump is always
on (contact is always on).
Stop
The selected pump is always
deactivated (contact is always
off).
Off Delay
The delay in seconds before
the contact of the pump is
deactivated.
N.B.
External pump relays can also be used as
an alternative to the boiler pump controller. If this
alternative is used, a dry contact of this
controller must be connected to W1 or / and W2
to allow the boiler to operate only when there is
a flow of water present.
4.3.4 CAPACITY LIMITING
Adjusting the maximum authorized power
This menu allows you to configure the boiler
output limit. The selection of the limit mode can
be selected in the
Capacity limiting
menu
o
None
o
Manual
o
DDC 0-10 VDC
o
T. Ext
o
Schedule
Details of each of these options are presented in
Section 4.9 .
N.B:
It is not recommended to disconnect one of
the power relays inside the VOLTMAX boiler to
accomplish this function.
N.B:
On the STG models, the maximum power
chosen must correspond to the power of the
stages of the boiler since there is no power
modulation relay on these models.
4.3.4.1 NONE
The boiler is not limited in power, the maximum
power it can deliver is equivalent to its maximum
rated power.
4.3.4.2 MANUAL
The maximum capacity permitted of the boiler is
configured in a fixed mode.
Details of the variables in this mode are
presented in
Section 4.9.1
4.3.4.3 DCC 0-10 VDC
(Available only on SCR model)
A 0-10 VDC signal from a building management
system can be used. The signal is treated as a
function in order to limit the maximum power.
In order to configure this mode, you must
connect the 0-10 VDC signal to the terminal
block
0-10Vdc Cap.
and
0-10Vdc G
.
Details of the variables in this mode are
presented in
Section 4.9.2