36 FAXA-SVX01B-EN
electrical
requirements
Electrical Requirements
Follow these guidelines, referring to unit
wiring diagrams and supply power
dimensional information to ensure
correct electrical requirements at the
installation site. Reference supply power
wiring locations on unit submittals or in
the Dimensions and Weights section on
page 13. Specific unit wiring diagrams
are provided on the inside of the control
panel door. Use these diagrams for
connections or trouble analysis.
Supply Power Wiring
It is the installer’s responsibility to provide
power supply wiring to the unit. Wiring
should conform to NEC and all applicable
code requirements. To ensure the unit
supply power wiring is properly sized and
installed, follow the guidelines below:
1. Verify the power supply available is
compatible with the unit nameplate
ratings. The supply power must be
within 10% of the rated voltage listed
on the unit nameplate.
2. Reference the electrical data in Tables
I-ER-1 through I-ER-8. Protect the
electrical service from over current and
short circuit conditions in accordance
with NEC requirements. Size protection
devices according to the electrical date
on the unit nameplate.
3. If the unit is not equipped with an
optional factory-installed disconnect,
you must install a field-supplied
disconnect at or near the unit in
accordance with NEC. Do not mount a
field-supplied disconnect on the unit.
Reference Figures I-DW-3 and I-DW-4
on pages 16–17 for the electrical
service entrance location.
4. Complete the unit power wiring
connections onto either the main
terminal block or the factory -mounted
non-fused disconnect switch located in
the control panel.
5. Provide proper unit grounding in
accordance with local and national
codes.
Installation
Table I-ER-1. Electrical service sizing data
unit reheat comp (A) main comp 1 (B) main comp 2 (C) main comp 3 (D)
size voltage tons* rla lra tons* rla lra tons* rla lra tons* rla lra
031 208/60/3 4.5 15 124 9.0 35 222 14.0 48 337 — — —
230/60/3 4.5 15 124 9.0 31 251 14.0 43 376 — — —
460/60/3 4.5 8 59.6 9.0 16 117 14.0 23 178 — — —
040 208/60/3 6.75 23 164 10.0 35 222 15.0 51 337 — — —
230/60/3 6.75 23 164 10.0 31 251 15.0 46 376 — — —
460/60/3 6.75 11 100 10.0 16 117 15.0 23 178 — — —
056 208/60/3 9.0 35 222 14.0 48 337 9.0 35 222 9.0 35 222
230/60/3 9.0 31 251 14.0 43 376 9.0 31 251 9.0 31 251
460/60/3 9.0 16 117 14.0 23 178 9.0 16 117 9.0 16 117
066 208/60/3 9.0 35 222 15.0 51 337 15.0 51 337 15.0 51 337
230/60/3 9.0 31 251 15.0 46 376 15.0 46 376 15.0 46 376
460/60/3 9.0 16 117 15.0 23 178 15.0 23 178 15.0 23 178
*tons refers to nominal R22 tons
electric heat FLA is determined at 208, 240, & 480 volts
Table I-ER-2. Supply fan motor fla
standard efficiency high efficiency
voltage 1 hp 2 hp 3 hp 5 hp 7.5 hp 10 hp 15 hp 1 hp 2 hp 3 hp 5 hp 7.5 hp 10 hp 15 hp
208/60/3 3.1 5.9 8.7 14.0 22.2 28.2 40.7 3.1 6.1 9.3 14.9 21.3 29.0 40.7
230/60/3 2.8 5.6 8.0 13.2 21.6 28.0 40.6 2.8 5.4 8.2 12.8 20.0 25.8 35.4
460/60/3 1.4 2.8 4.0 6.6 10.8 14.0 20.3 1.4 2.7 4.1 6.4 10.0 12.9 17.7
Table I-ER-5. Condenser fan motors
voltage f l a
208/60/3 3.8
230/60/3 3.6
460/60/3 1.8
Table I-ER-3. Exhaust fan motor fla
standard efficiency high efficiency
voltage 1 hp 2 hp 3 hp 5 hp 7.5 hp 10 hp 15 hp 1 hp 2 hp 3 hp 5 hp 7.5 hp 10 hp 15 hp
208/60/3 3.1 5.9 8.7 14.0 22.2 28.2 40.7 3.1 6.1 9.3 14.9 21.3 29.0 —
230/60/3 2.8 5.6 8.0 13.2 21.6 28.0 — 2.8 5.4 8.2 12.8 20.0 25.8 —
460/60/3 1.4 2.8 4.0 6.6 10.8 14.0 — 1.4 2.7 4.1 6.4 10.0 12.9 —
Table I-ER-4. Energy wheel motor fla
unit size 031 040 051 066
hp
1
/
2
1
/
2
3
/
4
3
/
4
voltage
208/60/3 2.7 2.7 3.6 3.6
230/60/3 2.4 2.4 3.0 3.0
460/60/3 1.2 1.2 1.5 1.5
Table I-ER-6. Factory-wired convenience outlet
voltage amps
208/60/3 7.21
230/60/3 6.52
460/60/3 3.26
Table I-ER-7. total gas heat amps with combustion blower
voltage amps
208/60/3 2.54
230/60/3 2.30
460/60/3 1.15
Table I-ER-8. Control power transformer (loads greater than 1 amp)
voltage amps
208/60/3 1.20
230/60/3 1.09
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