14
• Units are shipped from the factory wired for 240 volt
transformer operation. For 208V operation, remove the
lead from the transformer terminal marked 240V and
connect it to the terminal marked 208V.
• Internally mounted circuit breakers are available as field
installed options. These circuit breakers can be used
as an electrical disconnect.
• Connect the line-voltage leads to the terminals on the
contactor (or the circuit breaker if the field installed circuit
breaker kits are used) inside the control compartment.
Grounding
WARNING:
The unit cabinet must have an uninterrupted or
unbroken electrical ground to minimize personal
injury if an electrical fault should occur. Do not
use gas piping as an electrical ground
!
This unit must be electrically grounded in accordance
with local codes or, in the absence of local codes, with
the National Electrical Code (ANSI/NFPA 70) or the CSA
C22.1 Electrical Code. Use the grounding lug provided in
the control box for grounding the unit.
Table 4. Thermostat Wire Gauge
Thermostat
Wire Gauge
Recommended T-Stat Wire
Length (Unit to T-Stat)
2-Wire
(Heating)
5-Wire
(Heating/Cooling)
24
55
25
22
90
45
20
140
70
18
225
110
Thermostat / Low Voltage Connections
• The unit is designed to operate from a 24 VAC Class
II control circuit. The control circuit wiring must comply
with the current provisions of the NEC (ANSI/NFPA
70) and with applicable local codes having jurisdiction.
Thermostat connections should be made in accordance
with the instructions supplied with the thermostat and
the indoor equipment.
• The low voltage wires must be properly connected.
Route 24V control wires through the sealing grommet
near the power entrance. Recommended wire gauge
and wire lengths for typical thermostat connections are
listed in Table 4.
• Several thermostat options are available depending
on the accessories installed with the unit. Select a
thermostat that operates in conjunction with the installed
accessories.
• Back-up fossil fuel heat capability is required with the
Dual Fuel iHybrid™ heat pump packaged system. This
system is capable of providing two stages of cooling, two
stages of heating in heat pump mode, and an additional
two stages of secondary gas heating.
• The thermostat should be mounted about 5 feet above the
floor on an inside wall. DO NOT install the thermostat on
an outside wall or any other location where its operation
may be adversely affected by radiant heat from fireplaces,
sunlight, or lighting fixtures, and convective heat from
warm air registers or electrical appliances. Refer to the
thermostat manufacturer’s instruction sheet for detailed
mounting information.
COPPER WIRE SIZE — AWG
(1% Voltage Drop)
Supply Wire Length-Feet
Supply Circuit
Ampacity
200
150
100
50
6
8
10
14
15
4
6
8
12
20
4
6
8
10
25
4
4
6
10
30
3
4
6
8
35
3
4
6
8
40
2
3
4
6
45
2
3
4
6
50
2
3
4
6
55
1
2
3
4
60
Wire Size based on N.E.C. for 60° type copper conductors.
Table 3. Copper Wire Size
Table 2. Electrical Data
Model
Number
Maximum
Heating
Input
Nominal
Electrical
Supply
Voltage Range Compressor
Fan
Motor
FLA
Indoor
Blower
FLA
Single Circuit
Min
Max
RLA
LRA
MCA
MOP
DF6SF-X24K072C
72,000
208-230/60/1
187
253
11.4
52.0
0.91
4.3
20.8
30.0
DF6SF-X36K100C
100,000
208-230/60/1
187
253
19.0
82.0
2.8
6.8
34.7
50.0
DF6SF-X48K120C
120,000
208-230/60/1
187
253
24.0
96.0
2.8
9.1
43.3
60.0
DF6SF-X60K096C
96,000
208-230/60/1
187
253
26.0
118.0
1.5
9.1
44.5
60.0
DF6SF-X60K120C
120,000
208-230/60/1
187
253
26.0
118.0
1.5
9.1
44.5
60.0
Note:
FLA = Full Load Amps; LRA = Lock Rotor amps; RLA = Rated Load Amps.
