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SK2019 EU FDHD-V/P-AC-001
Wiring Diagram
D.2.1.
Complete Function PCB: AC-S1
CN1
X-DISI
AI1
AI2
AI3
TTL1
wired wall-pad
4-pipe coil circuit sensor
2-pipe sensor (Ti1):
return air sensor (Tr)
LED display / IR receiver
chilled/hot water
(Ti2):hot water
louver stepping moter
connections
CN2
A B A B
S1
S2
FLOAT EH2 EH1 PR2 PR1
AUX2
AUX1
HF MF LF VALVE1VALVE2 WP
G
Y
BK BL
PUMP
L1
N
PR
O
PR
O
A2
A2
A1
A1
G
TERMINAL
W
H
L
N N
N
N
RY7
BK
BL
YL/GR
WH
WH
RD
RD
GR
GR
485
FUSE
flo
at
c
on
tro
l s
w
itc
h
fo
r p
um
p
R
D
R
D
AC-S1 Control Box Wiring scheme
L\N :Power supply
VALVE1: 230V On/Off valve output.
(2-pipe: Cooling / Heating); (4-pipe: Cooling)
VALVE2: 230V On/Off valve output. (4-pipe: heating)
WP: 230V condensate pump output.
RYL: 230 V Electrical heater output.
HF: 230 V Fan motor high speed output.
MF: 230 V Fan motor medial speed output.
LF: 230 V Fan motor low speed outpu
AUX1: Voltage free contact;ON=unit in Heating mode.
AUX2:Voltage free contact;ON=unit in Cooling mode.
PRO:Occupancy contact.
FLOAT: Float swith for pump.
EH: protectionl swith for elecctrical heater
CN1~2: Stepping motor output.
TTL: Wired wall-pad.
AI3: Indoor coil temperature sensor 2 (Ti2).
AI2: Indoor coil temperature sensor 1 (Ti1).
AI1: Return air temperature sensor (Tr).
X-DIS1: LED recevier output.
RS485: Serial BUS contacts.
Legend:
DIPA-S1
SW1-5: set the unit address
SW6: set unit type: master or slave
Mode Configuration:
DIPB-S2
SW1: Occupancy contact setting
SW2: Unit configuration setting:0=2-pipe system
1=4-pipe system
SW3: On/off vavle configuration setting:
0=no vavle;
1=with vavle;
SW4: Pheheat setting: 0=36 C; 1=28 C.
SW5:Reserved.
SW6:1 = last unit on RS485 communication bus;
0 = other than above.
SW7=0;SW8=0;unit operates in cooling/heating.
SW7=0;SW8=1;unit operates in cooling/heating with
booster EH.
SW7=1;SW8=0;unit operates in colling only.
SW7=1;SW8=1;unit operates in cooling with primary EH
O
R
BR
YL
E
H
BK
BL
YL/GR
IPA19-DL-
F
D
HD
-AC-S