17
The PSC indoor blower motor in the (-)F1P air-handlers must also be configured for 208
volt applications to assure full air-flow delivery at the reduced voltage. This step is not
required on (-)F1T air-handlers since they have constant torque ECM motors. To con-
figure the PSC motor in (-)F1P air-handlers for 208 volt applications, unplug the PURPLE
motor lead connected to the insulated terminal on the end of the ORANGE wire coming
from the transformer. Pull the cap out of the insulated terminal on end of the YELLOW
motor lead and plug the cap into the terminal on the end of the PURPLE motor lead to
eliminate the possibility of an electrical short. Plug the YELLOW motor lead into the ter-
minal on the end of the ORANGE wire from the transformer. Secure the indoor blower
motor wiring with zip ties to assure they can’t come in contact with the blower wheel.
Replace the blower/control box access panel when the above is complete before apply-
ing electrical power to the unit.
3.12.2 GROUNDING
• Grounding may be accomplished by grounding metal conduit when installed in accor-
dance with electrical codes to the unit cabinet.
• Grounding may also be accomplished by attaching ground wire(s) to ground lug(s)
provided in the unit wiring compartment.
• Ground lug(s) are located close to wire entrance on left side of unit.
• Use of multiple supply circuits require grounding of each circuit to lug(s) provided in unit.
3.12.3 POWER WIRING
It is important that proper electrical power is available for connection to the unit model
being installed. See the unit nameplate, wiring diagram and electrical data in the installa-
tion instructions.
• If required, install a branch circuit disconnect of adequate size, located within sight of,
and readily accessible to the unit.
• IMPORTANT:
Units with electric heater kits installed may be equipped with one, two,
or three 30/60 amp circuit breakers. These breaker(s) protect the internal wiring in the
event of a short circuit and serve as a disconnect. Circuit breakers installed within the
unit do not provide over-current protection of the supply wiring and therefore may be
sized larger than the branch circuit protection.
• Supply circuit power wiring must be 75°C minimum copper conductors only. See
Electrical Data in Sections 3.12.5 and 3.12.6 for ampacity, wire size and circuit pro-
tector requirement. Supply circuit protective devices may be either fuses or “HACR”
type circuit breakers.
• Field power wiring may be connected to either the right, left side or top. Three
7
/
8
”,
1
3
/
32
”, 1
31
/
32
” dia. concentric knockouts are provided for connection of power wiring to
unit.
• Field power wiring is to be connected to the power terminal block in unit control com-
partment.
• For units equipped with an electric heater kit, field power wiring is to be connected to
the heater kit breaker, terminal block, or pullout disconnect terminals and the power
wiring pigtail from the heater kit is to be connected to the unit power terminal block in
the unit control compartment. Refer to installation instructions provided with the heat-
er kit for additional details.
WARNING
The unit must be permanently grounded. Failure to do so can result in electri-
cal shock causing personal injury or death.
!
S
U
P
P
L
Y
W
I
R
E
L
E
N
G
T
H
F
E
E
T
SUPPLY CIRCUIT AMPACITY
NOTE: WIRE BASED ON COPPER CONDUCTORS 75°C MINIMUM RATING.
FOR MORE THAN 3 CONDUCTORS IN A RACEWAY OR CABLE, SEE
N.E.C. FOR DERATING THE AMPACITY OF EACH CONDUCTOR.
12
12
14
14
15
10
10
12
12
20
8
10
10
10
25
8
10
10
10
30
8
8
8
8
35
6
8
8
8
40
6
6
8
8
45
6
6
6
6
50
4
6
6
6
60
4
4
4
4
70
3
4
4
4
80
3
3
3
3
90
2
3
3
3
100
2
2
2
2
110
1
1
1
1
125
0
0
0
0
150
00
00
00
00
175
3.12.4 COPPER WIRE SIZE - AWG. (3% VOLTAGE DROP)
200 [61]
150 [46]
100 [30]
50 [15]
