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Fig. 18 — Field Power Wiring
LEGEND
NOTES:
1. Factory wiring is in accordance with UL 1995 standards. Field modifications
or additions must be in compliance with all applicable codes.
2. All units or modules have single point primary power connection. Main
power must be supplied from a field or factory-supplied disconnect.
3. Wiring for main field supply must be rated 75 C. Use copper conductors only.
a. Incoming wire size range for terminal block with MCA (minimum circuit
amps) up to 175 amps is 14 AWG (American Wire Gage) to 2/0.
b. Incoming wire size range for terminal block with MCA from 175.1 amps to
420 amps is 2 AWG to 600 kcmil.
c. Incoming wire size range for non-fused disconnect with MCA up to
100 amps is 14 AWG to 1/0.
d. Incoming wire size range for non-fused disconnect with MCA from
100.1 amp to 200 amps is 6 AWG to 350 kcmil.
e. Incoming wire size range for non-fused disconnect with MCA from
200.1 amp to 450 amps is 3/0 to 500 kcmil.
4. Refer to certified dimensional drawings for exact locations of the main power
and control power entrance locations.
EQUIP GND — Equipment Ground
NEC — National Electrical Code
a38-7122
DUCT
SUPPLY
SAT
FS1*
FAN
EVAPORATOR
COIL
EAT
RETURN
AIR
OUTSIDE
AIR
Fig. 19 — EAT and SAT Sensor Layout
LEGEND
*FS1 can be pressure differential switch (shown), motor current detection, or sail switch.
EAT — Evaporator Air Temperature Sensor
FS1 — Fan Status Switch (24-v)
SAT — Supply Air Temperature Sensor
a38-7133