Condenser Air Duct Insulation Step 7 − Insulate The Unit; Step 8 - Complete Electrical Connections - Carrier AIR-COOLED CONDENSER UNITS 09BY006-024 Installation And Service Instructions Manual

Fig. 10 — Placement of Duct Flanges on Units
09BY016 and 09BY024
3. A high-density fiberglass (2 lb minimum density) or semi-
rigid foamed insulation such as Styrofoam™ will be re-
quired inside the ducts to prevent air erosion. The insu-
lation must be firmly secured in the discharge duct near
the blower discharge to withstand the high air velocity.
Step 7 — Insulate the Unit —
not insulated. If the unit will be operated during cold weather
and the equipment room is not at outdoor temperatures, the
unit cabinet should be insulated to prevent condensation. In-
sulate the unit in the same manner as the ductwork insula-
tion described in Condenser Air Duct Insulation section on
page 10.
UNIT VOLTAGE
09BY (3 Ph, 60 Hz)
208/230
006 460
575
208/230
008 460
575
208/230
012 460
575
208/230
014 460
575
208/230
016 460
575
208/230
024 460
575
LEGEND
FLA — Full Load Amps
MCA — Minimum Circuit Amps. Used for wire sizing.
(Complies with NEC Section 430-24.)
MOCP — Maximum Overcurrent Protection
NEC — National Electrical Code
*Units are suitable for use on electrical systems where voltage sup-
plied to the unit terminals is within listed minimum and maximum
limits.
The 09BY units are
Table 4 — Electrical Data
SUPPLY VOLTAGE*
Min Max
187 254
414 508
518 632
187 254
414 508
518 632
187 254
414 508
518 632
187 254
414 508
518 632
187 254
414 508
518 632
187 254
414 508
518 632
11
Step 8 — Complete Electrical Connections
IMPORTANT: Units may be used on 208, 230, 460,
or 575 v, 3-phase systems. As shipped from the fac-
tory, units are wired for 460 v or 575 v operation. If
the unit will be used on a 208 or 230 v system, rewire
the condenser fan motor prior to unit start-up. The 575-v
motor is connected to the proper voltage as shipped,
and all connections are internal to the motor.
To rewire the unit, disconnect and reconnect the wires at
the motor junction box as shown on the connection diagram
on the unit motor cover or in the unit wiring book.
GENERAL — Verify that nameplate electrical requirements
match available power supply. Voltage at condenser must be
within the minimum and maximum shown in Table 4 and
phases must be balanced within 2%. Contact local power com-
pany for line voltage corrections. Never operate a motor where
a phase imbalance in supply voltage is greater than 2%. Use
the following formula to determine the percentage of volt-
age imbalance:
% Voltage Imbalance
max voltage deviation from average voltage
= 100 x
average voltage
Example: Supply voltage is 240-3-60.
AB = 243 v
BC = 236 v
AC = 238 v
Average Voltage =
FAN
FLA Hp
7.5
3.4 2
2.7
10.5
4.8 3
3.9
10.5
4.8 3
3.9
16.7
7.6 5
6.1
16.7
7.6 5
6.1
30.8
14.0 10
11.0
NOTES:
1. Maximum allowable phase imbalance: Voltage ± 2%; Amps ± 10%.
2. Maximum incoming wire size for power circuit is 2/0 max.
243 + 236 + 238
3
717
=
3
= 239 v
POWER SUPPLY
MCA MOCP
9.4 15
4.3 15
3.4 15
13.6 20
6.0 15
4.9 15
13.6 20
6.0 15
4.9 15
20.9 35
9.5 15
7.6 15
20.9 35
9.5 15
7.6 15
38.5 60
17.5 30
13.8 20