Electrical Connections Between Internal And External Unit - Elco Aerotop Split M-Rx Guide D'installation

Installation guide

Electrical connections between internal and external unit

Before any work on the system, shut off
the power at the breaker.
Electrical connections between internal
and external units must be performed
using the three low voltage terminals:
GND, A, B.
Connect «GND» on the terminal block of
the internal unit with «GND» on the exter-
nal terminal block.
Connect «A+» terminal block on the inter-
nal unit with «A» on the external terminal
block.
Connect «B-» terminal block on the inter-
74 / GB
nal unit with «B» on the external terminal
block.
NOTE
It is strongly recommended to verify
the presence of a surge protection
device (SPD) on main power line and
of circuit breakers connected to the
external and internal unit's control
box.
* SEE TABLE OF ELECTRICAL CONNEC-
TIONS
MOD. BUS
ANODE
TA 1 TA 2 SE
GND A+ B-
+24V
WARNING
After carrying out the connections
between the indoor and outdoor
unit, put back both panels of the res-
pective units.
1 ph
T T
ON ON
OFF OFF
XXA XXA
30mA 30mA
N N N N
BUS IN
TNK BUF
B T AUX 1
3 ph
*
XXA XXA
N N