AQUAKOND AKY
CONDENSING BOILER
39
code HC0048.10GB ed.B-1811
AKY
9.
WIRING DIAGRAMS
Connection details are described in the installation chapter.
AKY boilers have the same wiring diagram and operating principle. Differences concern some points indicated in the notes below.
IP
AKY050/070/100 boilers have an additional protection located on water maximum pressure. The activation
of this device causes error F21 and requires manual reset.
STB
Safety thermostat with automatic reset; the activation causes an error F20, detected by the PCB, and
requires PCB manual reset by means of the reset key located on the ACF flame monitoring equipment.
ON/OFF
we remind that all boilers compulsorily require ambient thermostat connection.
If SmartEASY/WEB control is used, use jumpers between ID2/IDC2 terminals.
All the controls mentioned operate as an ambient thermostat.
Component key
ACF
Flame monitoring equipment
ACC
Start-up electrode
IONO Detection electrode
F5
4.0 AT fuse on the PCB (delay - 230V side)
F6
2.5 AT fuse on the PCB (delay - 24V side)
FLUX Water flowmeter
IPMIN MIN INAIL pressure switch (AKY050/070/100 only)
IPMAX MAX INAIL pressure switch (AKY050/070/100 only)
KOND Condensation detection electrode
NTC1 Water delivery temperature probe
NTC3 Fumes temperature probe (AKY032/034/050/070 only)
P
Hydraulic circuit pump [Circulator]
PFLUE Flue gas pressure switch
PREX Circuit minimum pressure control switch
RE
ACF equipment lockout signalling LED
SB
ACF equipment reset button
TDOOR Burner door thermostat (AKY100 only)
TF
Exchanger protection thermal fuse
TFUMI Flue gas thermal fuse
TS
Safety thermostat
VAG
Burner fan
VG
Gas solenoid valve
