elco LOGON SOL plus, Operating Manual, Page: 7 / 24

7
Domestic water backup heating using a boiler
When the LOGON SOL plus
controller is used to control a boiler
that provides supplemental heat for
the domestic water, it must be inter-
connected with the boiler controller
(sensor-side terminals 14 and 15,
see connection diagram). The follo-
wing LOGON SOL plus features
make it capable of interacting fle-
xibly with the boiler controller. A
jumper located on the back of the
controller can be used to choose
between a changeover switch with
resistors and a zero-resistance
changeover switch.
Place the jumper in position Y to
use LOGON SOL plus in conjunc-
tion with LOGON controllers
(SYSTRON, UNON, VARION) to
control domestic water backup
heating (see diagram).
The connected resistors are used
to simulate temperatures.
Off = 1320 ohms = 70°C
On = 8200 ohms = 25°C
Place the jumper in position X to
use LOGON SOL plus in conjun-
ction with non-LOGON controllers
(THISION, TRIGON, STRATON or
third-party boilers) to control dome-
stic water backup heating. This se-
lects a changeover switch with zero
resistance.
The jumper is in position X when
the controller leaves the factory.