VOLTMAX ELECTRIC BOILER Installation and Operation Manual
(
Revised March 2019)
, Page
33.
Schedule
The maximum authorized boiler power can be
programmed according to a schedule. See
section 4.8.4
for an explanation of how to modify
a schedule.
AUXILIARY BOILER
The controller program has been designed to
allow the operation of a second boiler or auxiliary
boilier.
Select setpoint source for Auxiliary
Boiler
The source of the set-point temperature control
can be configured by selecting
STPT source
Aux.
consequently.
In the
VoltMax
mode, the terminal contact
Aux
closes when there is a request for W1 or
W2/DHW and the VoltMax output temperature is
below the setpoint temperature. In addition, the
Aux contact is opened when the output
temperature is higher than the setpoint
temperature.
In
AUXILARY
mode, the Aux contact closes
when there is a request on W1 or W2 / DHW
regardless of the boiler output temperature
VoltMax. The VoltMax boiler thus has no set
temperature and is only used to activate the
auxiliary boiler relay. The various configurations
of the
Aux boiler
mode are the following:
None
No auxiliary boiler is present
Backup
Aux.
This mode allows the adjustment of
a second boiler to play a Backup
role
Ext
Contact
Select the heating source using
external contact to the
BI-E
terminal.
BiE (BI-
Energy)
Select the heating source using
external contact to the BI-E terminal
with the possibility of support
mode of the auxiliary boiler.
Manual
Manually
select
the
system
operation
mode
(Electrical
or
Auxiliary).
N.B.
The auxiliary boiler can only be switched on
when a heat demand is present on W1 or / and
W2 / DHW.
None
This mode must be active when there is no
auxiliary boiler on the hydronic heating system.
Backup Aux.
The boiler will be activated according to the
configuration of the lack of capacity of the
VoltMax boiler.
In the event of a lack of capacity, the boiler is
started to compensate.
The lack of capacity is defined by the fact that the
boiler output temperature is less than X degrees
(
Delta T. Start Aux
.) relative to the set-point for
duration of X min. (
Auxiliary Start Delay
). The
auxiliary boiler will be deactivated when the
temperature differential between the water outlet
temperature and the set-point temperature is
lower than
Delta T. Off Aux
.
The calculation of
the delay begins only when the electric boiler
reaches its maximum power (or maximum power
allowed).
The value of "Delta T." should be a negative
value.
Details of the variables in this mode are
presented in
Section 4.9.1
Contact Ext.
This configuration mode makes it possible to
operate the electric boiler or the auxiliary boiler
according to a contact. During a close contact at
the
BI-E
terminals, the electric boiler (
) is
activated. When the contact is open, the auxiliary
boiler (
) will be on. The auxiliary boiler will not
be allowed to operate if the electric boiler lacks
capacity.
Details of the variables in this mode are
presented in
Section 4.9.2
BiE (BI-Energy)
The Bi-Energy mode allows the auxiliary boiler to
operate when there is a lack of capacity.
Upon receipt of an electrical signal (contact
closed at
Bi-E
) and a request at the terminal of
W1
or
W2
, the contact at the terminal of
AUX
will
