Accorroni PACK DUE 12, Technical Manual

Page: 38 / 48

37
22 WIRING DIAGRAMS
22.1 INDOOR UNITS
U
S
E
R
C
O
NNE
C
T
IO
NS
CONNE
C
T
IO
NS
IN
S
ID
E
T
H
E
U
N
IT
EX
P
A
NS
IO
N
O
N-
B
O
A
RD UNI
T
CO
NNECT
IO
N
USER CO
NNECT
IO
NS
A1 Electronic controller FU2 Auxiliary fuse
A2 Expansion for solar kit (optional) KM1 Heater integration contactor assembly
A3 Integration resistance control panel/Sanitary boiler anti ‐ legionnaires KM2 Contactor for Integration resistance and sanitary boiler anti ‐ legionnaires
A4 Outdoor mono ‐ condensing unit QF General differential switch (not included)
BT1 Water inlet sensor for the plant R1 Plant integration resistance
BT2 Water outlet sensor for the plant R2 Integration resistance and sanitary boiler anti ‐ legionnaires
BT3 Sanitary water sensor for boiler TH1 Ambient thermostat
BT4 Outdoor air temperature sensor THS1 Resistance R1 of safety thermostat action at 80°C reset at 70°C.
E1 Circulating pump of the plant THS2 Resistance R1 of manual reset safety thermostat 110°C
F1 Water flow for the plant THS3 Resistance R2 of safety thermostat resistance
FU1 Integration resistance fuse for the plant YV1 3 ‐ way valve for sanitary hot water
WARNING: For connection to outdoor moto ‐ condensing (A4) see the paragraph 6.5.1.1 The grounding of the signal cable to the
moto ‐ condensing (E ‐ GND) should not be connected and must be protected from accidental contact with the plate: cut it or
isolate it with special tape. The terminals to connect on A4 are: R ‐ with P / R+ with Q.