Mitsubishi Heavy Industries FDCW100VNX-A, Technical Manual

Page: 102 / 315

Circulation pump (GP12)
For HSB series, circulation pump (GP12) is installed outside of
indoor unit. Choose correct terminal according to the type of
controller.
<HSB series with RC-HY20
-W
>
Connect the port 5, 6 and 7 on X4 terminal on AA2 board on
RC-HY20/40 -W to the port PE, N and L on circulation
pump respectively. Control signal cable is connected
between the port 1 and 2 on X2 terminal on RC-HY20 and
PWM and GND on circulation pump respectively as shown
below.
Installation
'19 • HM-T-340
Indoor unit installation
Cascade connection setting
In case of cascade connection system, it is necessary to allot
unique address to each indoor unit. Set the DIP switch S3-1, -2
and -3 according to the following table.
Address S3:1 S3:2 S3:3
1 OFF OFF OFF
2 On OFF OFF
3 OFF On OFF
4 On On OFF
5 OFF OFF On
6 On OFF On
7 OFF On On
8 On On On
RC-HY20
-W
Recommended fuse size
Please refer to page 95.
Recommended cable size
Please refer to page 95.
Power source
Connect power cable on X1 terminal as shown below.
RC-HY20/40
-W must be installed via an isolator switch
with a minimum breaking gap of 3mm. Minimum cable area
must be sized according to the fuse rating used.
N L
X1
RC-HY20/40 -W X1
Connection between indoor unit and controller
Signal cable is connected between controller and indoor unit
with screened 3 cores cable for HSB series. Choose correct
terminal according to the type of controller as shown below.
<HSB series with RC-HY20
-W
>
Connect the port 19(A), 20(B) and 21(GND) on X2 terminal
on RC-HY20 -W to the port 1, 2 and 3 on X4 terminal on
AA23 board on HSB series respectively.
6
5
4
3
2
1
A
B
GND
A
B
GND
A
B
GND
19
20
21
18
X2
RC- HY20 -W
AA23-X4
HSB
RC-HY20 -W
X2
4 5 6 7 8 9
Externt
PE
L
N
External
RC-HY20-W
AA2-X4
EB101-GP12
2
1
4
3
Externt
External
RC-HY20-W
X2
EB101-GP12
PWM
GND
LEK
L N 1 1 0 2 3 4 PE
AA2-X4
RC-HY20 -W
RC-HY20 -W
X2
- 100 -
#