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SK2018 PCG(H)-V/P-AECM-001
D.2.
Wiring Diagram
D.2.1.
Standard S Control PCB
AEC-S1-2018
IPA-S1
SW1-5: set the unit address
SW6: set unit type: master or slave
Mode Configuration
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 cooling
SW7=1;SW8=1; unit operates in cooling with
primary EH
DIPB-S2
SW1: Occupancy contact setting;
SW2: Unit configuration setting: 0=2pipe system;
1=4-pipe system;
SW3: On/off valve configuration: 0= no valve
1=with valve (applicable to 2 pipe system only);
SW4: preheat setting: 0=36C;1=28C
SW5: Fan1(CN4)configuration setting: 0=Fan1 OFF;
1=Fan1 ON .
SW6:Fan2(CN5)configuration setting: 0=Fan2 OFF;
1=Fan1 ON .
L1/N ----115Vac 60Hz Power supply,
VALVE1(Y1): 24V on/off valve output
(2pipe :cooling/heating ; (4pipe:cooling)
VALVE2(W1): 24V on/off valve output.;
(4-pipe only:heating)
WP: Condensate pump output
A1: Voltage free contact; ON:unit in heating mode.
A2: Voltage free contact; ON:unit in cooling mode.
PRO: Occupancy contact
CN1~2: Stepping motor output.
CN3: Serial BUS contact
CN4: Fan motor 1 output
CN5: Fan motor 2 output
AI1: Return air temperature sensor(Tr)
AI2: Indoor coil temperature sensor1 (Ti1)
AI3: Indoor coil temoeraturesensor 2 (Ti2)
X-DISI----LED receiver output
DA1-24VAC input for modulating valves.
DA2-modulating valve 1 output(0-10V modulating
signal).(2-pipe:Cooling/Heating) (4-pipe:Cooling)
DA3-modulating valve 1 output(0-10V modulating
signal).(4-pipe only:heating)
BLDC
F
U
S
E
DA1
DA2
X-DISI
AI1
AI2
AI3
TTL1
CN1
E
H
R
D
R
D
P
U
M
P
F
LO
A
T
G
N
D
te
m
pe
ra
tu
re
c
on
tr
ol
s
w
itc
h
fo
r
e
le
ct
ric
a
l h
e
at
er
flo
at
c
o
nt
ro
l s
w
itc
h
fo
r
pu
m
p
B
L B
K
O
R
B
K
/2
.5
W
H
/2
.5
O
R
G
Y
L1
JP4
JP3
JP1
V
A
L
V
E
1
V
A
L
V
E
2
N
O
N
/O
F
F
CPU
B
L
DA3
CN2
BLDC
CN4
CN5
O
N
/O
F
F
P
E
CN3
NEXT UNIT
A B A B
S1
S2
485
A
U
X
1
A
U
X
1
A
U
X
2
A
U
X
2
L-
E
H
E
H
G
N
D
N
N
N
B
L
R
D
W
H
B
R
O
R
PUMP
W
H
RY6
FUSE
BK
BL
RD
RD
WH
WH
GR
GR
L1
N
G
N
A
1
A
1
A
2
A
2
P
R
O
P
R
O
YL/GR
JP2
JP5
JP6
JP7,8
YL/GR
EC moter
MOTOR3
MOTOR1
MOTOR2
MOTOR4
2 pipe sensor (Ti1)
4-pipe coil circut sensor
Renturn sensor (Tr)
NA-AEC-S1-unit wiring scheme
2
4V
a
c C
oo
lin
g
/h
e
at
in
g M
od
ula
te
v
alv
e
24
V
a
c h
ea
tin
g
M
od
ula
te
v
alv
e