VOLTMAX ELECTRIC BOILER Installation and Operation Manual
(
Revised June 2017)
, Page
43.
when the temperature differential between the
water outlet temperature and the set-point
temperature is lower than
Delta T. Off Aux
.
The operation of the auxiliary boiler is explained
in detail in
Section 4.10
The source of the set-point temperature control
can be configured by selecting
STPT source
Aux.
Consequently.
The set-point temperature control can be
dictated by the auxiliary boiler by selecting the
External
mode. 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
electrical contact to the
BI-E
terminal.
BiE (BI-
Energy)
Select the heating source using
electrical 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.
4.3.5.1 None
This mode must be active when there is no
auxiliary boiler on the hydronic heating system.
4.3.5.2 Backup Aux.
The boiler will be activated according to the
configuration of the lack of capacity.
Details of the variables in this mode are
presented in
Section 4.10.1
4.3.5.3 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 0
4.3.5.4 BiE (BI-Energy)
The Bi-Energy mode allows the auxiliary boiler
to operate when there is a lack of capacity. The
auxiliary boiler will then be activated to help the
electric boiler reach its set temperature
according to the operating parameters
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 be opened and thus the electric boiler (
) is
allowed to operate and the auxiliary boiler is
deactivated.
When an electrical signal is absent (contact
open at
Bi-E
) and a request is present at the
terminals of
W1
or
W2
, the contact will close at
the terminal of
AUX
, in order to operate the
boiler Auxiliary (
) and not the electric boiler.
Details of the variables in this mode are
presented in
Section 4.10.4 .
4.3.5.5 Manual
Manual mode is used to manually select the
operating mode of the system (Electrical or
Auxiliary).
Details of the variables in this mode are
presented in
Section 4.10.3
4.3.6
LIMIT SETTING
Configuring the boiler operating limits
Use this menu to adjust the permissible
operating boiler limits for various parameters.