THERMO 2000 VoltMax105, Installation And Operation Manual

Page: 48 / 60

VOLTMAX ELECTRIC BOILER Installation and Operation Manual (
Revised March 2019)
, Page
48.
BACKUP MODE
Configures a second boiler as a backup.
Display BACnet variable Instance Tag Description Parameters Default
STPT
Source WP_STPTSource
Aux
22 20971542
Selects the source used to control the set-point
temperature.
Auxiliary means that the set-point will be
determined by the auxiliary boiler. The VoltMax
boiler therefore has no set-point temperature and is
only used to activate the auxiliary boiler relay.
Voltmax means that the set-point temperature will
be determined by the VoltMax boiler.
Auxiliary or
VoltMax
0 = Auxilliary
1 = VoltMax
VoltMax
Delta T.
Start Aux. WP_DeltaTStartA
ux
44 8388652
This option adjusts the temperature differential (set-
point temperature
– Water outlet temperature) used
to activate the auxiliary boiler.
0 to 55 0 C
0 to 100
0
F
20 0 F
Delta T.
Stop Aux. WP_DeltaTStopA
ux
45 8388653
This option configures the temperature differential
(set-point temperature
– Water outlet temperature)
in the VoltMax boiler used to deactivate the
auxiliary boiler.
0 to 55
0
C
0 to 100 0 F
5 0 F
Delay Start
Aux. WP_DelayStartA
ux
46 8388654
This option adjusts the delay before activating the
auxiliary boiler.
Min 10
EXTERNAL CONTACT MODE
This mode selects the hydronic system heating source (VoltMax boiler or auxiliary boiler) using the BI-E
terminal’s electrical switch.
Display BACnet Variable Instance Tag Description Settings Default
STPT
Source WP_STPTSource
Aux
22 20971542
Selects the source used to control the set-point
temperature.
External means that the set-point will be
determined by the auxiliary boiler. The VoltMax
boiler therefore has no set-point temperature and is
used only to activate the auxiliary boiler’s relay.
Internal means that the set-point temperature will
be determined by the VoltMax boiler.
External or
internal
Internal
MANUAL MODE
Manual mode is used to select the system’s operating mode (Electric or auxiliary).
Display BACnet Variable Instance Tag Description Selection Default
Active Boiler WP_ActiveBoiler 23 20971543
This option selects which boiler is in operation;
either the VoltMax boiler (electric) or the auxiliary
boilder (auxiliary). VoltMax ou
Auxiliary
0 = VoltMax
VoltMax