Hitachi RCIM-1.0FSRE - Page 67

3 Electrical and control settings
Unit electrical wiring and connection
SMGB0137 rev.0 - 05/2021
57
3

Expansion valve box terminal board
Exp
.valve
bo
x
Expansion
valvebox

Terminal board connections and remarks
Terminal board 1
Mark Item Name Description
Wire and maximum current
specication (EN60335-1)

1 V+
DUTY V: Duty control by voltage (0~10V) (0~5V) (optional):
V+:Outputpowertodevice(+24Vdc)
Wiresection:3x0,5mm
2
? NOTE
Maximum power by 24VDC
output:3W
2 D D:Voltageinput(0~10V)(0~5V)
3 N N:GND

4 1
CO
2
signal (optional):
Freecontact:Byclosingthesignal,thefanspeedissettoHighmode.
Wiresection:2x0,5mm
2
5 2

6 T
EC1: PWM Output control for EC FAN 1 (optional):
T:Tachinputsignal(Hz)
Wiresection:3x0,5mm
2
(*1)
7 P P:PWMoutputsignal(0-100%)
8 G G:GND

9 T
EC2: PWM Output control for EC FAN 2 (optional):
T:Tachinputsignal(Hz)
Wiresection:3x0,5mm
2
(*1)
10 P P:PWMoutputsignal(0-100%)
11 G G:GND

12 V+
DUTY A: Duty control by current (4~20mA) (optional):
V+:Outputpowertodevice(+24Vdc)
Wiresection:3x0,5mm
2
? NOTE
Maximumpowerby24Vdc
output:3W
13 D D:Currentinput(4~20mA)
14 N N:GND

15 1
FS: Float switch (optional):
Free contact between terminals 1(15) and 2(16)
Wiresection:2x0,5mm
2
16 2

17 1 CONTROL: H-LINK and remote controller communication (Necessary):
The H-LINK transmission between outdoor unit and indoor unit is 2 wired to
terminals 1-2.
Wiresection:2x0,5mm
2
18 2
19 A
The Remote controller must be connected between pins A and B
(non polarity)
Wiresection:2x0,5mm
2
20 B
? NOTE
(*1):Iffanwiringlengthishigherthan3m,useshieldedwiresincompliancewithlocalcodes.