Carrier 40QA, Installation, Start-Up And Service Instructions Manual

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Step 6 — Make Electrical Connections —
Be sure
field wiring complies with local building codes and NEC,
and unit voltage is within limits shown in Table 7.
Contact local power company for correction of improper
line voltage.
To avoid personal injury or damage to unit, do not make
electrical connections until all power sources are shut
down, locked out, and tagged off. Failure to do so could
result in personal injury or unit damage.
Operation of unit on improper line voltage constitutes
abuse and could affect warranty. Refer to Table 7 for
permissible operating limits. Do not install unit in sys-
tem where voltage may fluctuate above or below per-
missible limits.
NOTE: Use copper wire only between disconnect switch(es)
and unit.
NOTE: Install branch circuit disconnect of adequate size to
handle unit starting current per NEC. Locate disconnect within
sight from and readily accessible from unit, per Section 440-14
of NEC. Some codes allow indoor unit to share disconnect
with outdoor unit if disconnect can be locked; check local
code before installing in this manner.
1. Route ground and power wires.
According to NEC and most local codes, the unit must
have an uninterrupted, unbroken ground to minimize per-
sonal injury if an electric fault should occur. The ground
may consist of electrical wire or metal conduit when in-
stalled in accordance with existing electrical codes. Fail-
ure to follow this warning could result in an electric shock,
fire, or death.
2. Route line power leads (see Fig. 17) from indoor discon-
nect to the fan coil unit. Place wire through hole on the
control box (Fig. 18). Connect wire to high voltage ter-
minal board (TB1) and ground screw. When routing the
wire in the unit, use care to keep the wire away from re-
frigerant and condensate piping and any sharp edges. The
208/230 V units are factory wired for 230 V to 24-V trans-
former operation. For 208 V to 24-V operation, inter-
change blue (208 V) and red (230 V) wires. Cap any un-
used wires with wire nuts.
Table 7 — Electrical Data
UNIT
40QA
Volts
(Single-Ph,
60 Hz)
MINIMUM
OPERATING
VOLTAGE*
MAXIMUM
OPERATING
VOLTAGE*
FAN
HEATER POWER
MIN
WIRE
SIZE
(AWG)
Motor 1 Motor 2
FLA Hp FLA Hp kW FLA MCA MOCP FLA
B024†
115 104 127 1.2 1 ⁄
15
− − − − 1.50 15 1.20 14
208/230 187 253 0.5 1 ⁄
15
− − − − 0.63 15 0.50 14
B036
115 104 127 4.0
1
⁄
6
− − − − 5.00 15 4.00 14
208/230 187 253 1.3 1 ⁄
6
− − − − 1.60 15 1.30 14
B048
115 104 127 2.2
1
⁄
15
1.0
1
⁄
15
− − 4.00 15 3.20 14
208/230 187 253 1.1 1 ⁄
15
0.5 1 ⁄
15
− − 2.00 15 1.60 14
B060 208/230 187 253 1.3
1
⁄
6
1.3
1
⁄
6
− − 3.30 15 2.60 14
E024† 208/230 187 253 0.5 1 ⁄
15
− − 2.00 8.66 9.29 15 11.29 14
E036 208/230 187 253 1.3
1
⁄
6
− − 3.00 13.00 17.70 20 14.30 14
E048 208/230 187 253 1.0 1 ⁄
15
0.5 1 ⁄
15
4.00 17.40 23.80 25 19.00 12
E060 208/230 187 253 1.3 1 ⁄
6
1.3 1 ⁄
6
5.00 21.70 28.70 30 24.30 10
LEGEND
AWG — American Wire Gage
FLA — Full Load Amps
MCA — Minimum Circuit Amps per NEC Section 430-24
MOCP — Maximum Overcurrent Protection
NEC
— National Electrical Code
*Permissible limits of the voltage range at which units will operate satisfactorily.
†Electrical data is the same for both the 24,000 Btuh 024 unit and the 024 unit which has been field-reconfigured for 18,000 Btuh. Refer to Before
Installation section on page 3 for reconfiguration details.
Fig. 16 — Routing Drain Piping
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