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2) Electrical
I
DANGER: Electrical
shock hazard.
Turn OFF electric power at the fuse box or service panel before making any
I
electrical connections and ensure a proper ground connection is made before connecting line voltage. Failure to do
I
so can result in property damage, personal injury and/or death.
A. Grounding
,_. CAUTION: The unit must be electrically wired and grounded in accordance with all state and local codes, national electric
code, and NFPA 70. Unit and controls will NOT operate unless properly grounded. Aground lug is provided for ground
connection. Use only approved copper wire and connectors from unit to service panel.
B. Power
Supply
NOTE: Line voltage circuit is completelyfactory
wired. Make all line voltage connections inside circuit breakerjunction box.
ThecircuitbreakersorfusesusedforbranchcircuitprotectionshouldbeULrecognized.
If circuit breakers are used, the circuit
breakerfor the compressorcircuit
must havea UL HACRrating.
Iffuses are used, thefuseforthecompressorcircuitMUST
be time delay type.
CAUTION:
Units are dual voltage rated 208-230/1/60.
The 24V control transformer must be connected for either 208V
or 240V power source for proper operation. Line voltage must not exceed 253V or go below 197V. The transformer
connection
must be changed
for 208V operation.
Depending on auxiliary heater size, unit must be supplied with 2 or 3 separate 208V or 240V circuits from structure's fuse
box or service panel.
Each circuit is internally connected to a circuit breaker located in the unit control box located at the
front center of the unit. Refer to Table 4 and Table 5 for required circuits and recommended wire size for each circuit.
Table
4
Minimum
Circuit
Maximum
Fuse2or
=
Model
Compressor
Amps
Outdoor
Fan Amps
Indoor
Fan
Amps
Ampacity
Minimum
Wire
Size 1
Breaker
Size
Amps
u. _
V(E,H)B18
7.9
1.7
1.7
14.0
12
20
m _
V(E,H)B24
9.3
1.7
1.7
16.7
12
25
_-
V(E,H)B30
15.0
2.2
1.8
22.8
10
30
t33
._=
,_
V(E,H)B36
17.9
3.0
2.5
27.9
8
40
oo 'o
V(E,H)B42
20.4
4.7
3.0
34.0
8
50
O
V(E,H)B49
22.1
4.6
3.0
41.0
6
60
V(E,H)B60
32.1
4.6
3.1
49.0
6
60
Table
5
Heater
Size
Chassis
Ckt#1
Ckt #1 Wire
Ckt #1 Max.
Ckt #2 &3 3
Ckt#2&3
3
Ckt #2 &3 3
Ckt#2&
3s
(KIN)
Available
Ckt #1 Amps
Arn pacity
Size _
Fuse 2
Amps
Am pacity
Wire Size _
Max. Fuse 2
Q
5.0
18/24
20 8
26.0
I O
30
N/A
KVA
N/A
N/A
O.
10.0
18/24/30/36/42
416
52.0
6
60
N/A
NVA
N/A
N/A
69
15,0
30/36/42/48
208
26.0
10
30
41.6
52.0
6
60
o_
20,0
48/60
41 6
52.0
6
60
41.6
52.0
6
60
i
25,0
60
208
26.0
10
30
41.6
52.0
6
60
1 if wire is apptied at ambient greater than 30°C (86°F), consult Table 310-16 of the NEC (ANSI/NFPA
70)
The ampacity of nonmetalic-sheathed
cable (NM), trade
name ROMEX, shalt be that of 60°C (140°F) conductors,
per the NEC (ANSI/NFPA
70)Article
336-30.
If other than uncoated
(non-plated),
60°C or 75°C (140°F or
167°F) insulation, copper wire (solid wire for 10 AWG and smalter, stranded wire for larger than 10 AWG) is used, consult applicable tables of the NEC (ANSI/NFPA
70).
2 Time-delay
fuse.
3
Circuit #3 is only used for 25kw heater
Auxiliary
(Field
Heat Pump
(Field
Wiring)
Heat Pump
Auxiliary
Heater#1
Ground
(Field
Auxiliary
Heater#2
(Field
Wiring)
Line Voltage
And Ground
Connections
AUXILIARY
HEATER
#I
POWER
WIRING
(FIELD
WIRING)
= AUXILIARY
HEATER
#I
GROUND
LUG
• AUXILIARY
HEATER
#2
(FIELD
WIRING)
t60A,
PARALLEL
WIRING)
Unit Wiring with VPDB1 Distribution
Block
12
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