Johnson Controls YVAHP072B31S, Service Manual

Page: 244 / 1796

1-228
Service Manual
INSTALLATION
Table 8.1 Recommended Wiring Capacity and Sizes
Follow local electrical codes when selecting a GFCI device.
Model
Power
Supply
Minimum Wire Thickness
[AWG (mm
2
@
GFCI
<Ground Fault
Circuit Interrupter>
Main Switch
MCA
<Minimum
Circuit
Ampacity>
Power
Supply
Wiring Size
< Main >
Ground
Wiring
Size
Comm.
Cable
Size
Nominal
Current
Nominal
Sensitive
Current
Nominal
Current
Fuse
>$@ >P$@ >$@ >$@ >$@
+<,&%6
a
208/230V
60Hz
18 (0.82) 18 (0.82) 18 (0.82) 15 30 15 15
0.4
+<,&%6 0.5
+<,&%6 0.9
+<,&%6 0.9
+<,&%6 1.1
+<,&%6 1.2
NOTES:
1.
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2. Select the GFCI with activation speed of 0.1 sec. or less.
3. Total operating current is less than 12A.
Ɣ Check for the recommended size GFCI shown in the table 8.1.
Ɣ %HWZHHQLQGRRUDQGRXWGRRUXQLWVXVHGXDOFRQGXFWRU AWG18 (0.82mm
2
) stranded copper cable
for communication cable. Do not use any cable with more than two conductors. Twisted pair or
shielded cable can be used in environments with excessive electrical noise to reduce the possibility
of communication errors between system components. Total cable length should not exceed 3281 ft
(1000m).
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HDFKUHJLRQWKH,QVWDOODWLRQDQG0DLQWHQDQFH0DQXDODQGWKHGHGLFDWHGHOHFWULFDOFLUFXLWWKDWPXVWEH
used.
Ɣ 2XWVLGHRIWKHLQGRRUXQLWLQVWDOODWLRQRIWKHSRZHUVXSSO\ZLULQJFRPPXQLFDWLRQFDEOHDQGZLUHG
controller cable should be spaced as far apart as possible.
+HDW3XPS6\VWHP! +HDW5HFRYHU\6\VWHP!
8.2.2 Details of Electrical Wiring Connection
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0DLQWHQDQFH0DQXDOIRUWKHRXWGRRUXQLW$GMXVWLQJWKH',3VZLWFKHVPD\EHUHTXLUHGGHSHQGLQJRQWKH
arrangement with the outdoor unit.
Select wiring capacity according to the table 8.1. Install a GFCI (Ground Fault Circuit Interrupter) and
main switch as shown in each of the system diagrams below.
NOTICE
Outdoor
Unit
Indoor
Unit
Switchbox
Outdoor Unit
Power Supply
Indoor Unit
Power Supply
Indoor
Unit Indoor
Unit
GFCI
Main
Switch GFCI
*1, *2
*3 *3
*4 *4 *4
*5 *5
*5
Main
Switch
Refer to the “Installation and Maintenance Manual”
for the connected outdoor unit for details of wire,
GFCI and main switch for outdoor unit.
*3
Outdoor Unit
Power Supply
Outdoor
Unit
Change-Over
Box
Indoor Unit
Power Supply
Indoor
Unit
Switchbox
Indoor
Unit Indoor
Unit
GFCI
Main
Switch GFCI
*1, *2
*3
*3 *3
*4
*5 *5
*5
*5
Main
Switch
*4
*4
*3
Refer to the “Installation and Maintenance Manual”
for the connected outdoor unit for details of wire,
GFCI and main switch for outdoor unit.