Carrier Infinity 480CEN024 Installation Instruction page 14

UNIT
V-PH-HZ
SIZE
024 208/230 1 60
030 208/230 1 60
208/230 1 60
036
208/230_3 60
208/230 1 60
042
208/230_3 60
208/230 1 60
048
208/230_3 60
208/230 1 60
060
208/230_3 60
VOLTAGE
RANGE
Min Max
187 253
187 253
187 253
187 253
187 253
187 253
187 253
187 253
187 253
187 253
Table 3--Electrical Data - Unit 48CE
OUTDOOR
COMPRESSOR
FAN MOTOR
FLA
0.8
0.8
0.8
0.8
0.8
0.8
1.6
1.6
1.6
1.6
INDOOR FAN
MOTOR
POWER SUPPLY
MCA RLA LRA
13.5 61.0
15.9 73.0
16.9 83.0
12.2 77.0
22.4 105.0
15.4 88.0
21.3 109.0
14.7 91.0
27.0 145.0
19.2 137.0
FLA
4.3
4.3
6.8
6.8
6.8
6.8
6.8
6.8
9.1
9.1
22.0/22.0
25.0/25.0
28.7/28.7
22.9/22.9
35.6/35.6
26.9/26.9
35.0/35.0
26.8/26.8
44.5/44.5
33.3/33.3
MAX FUSE
OR CKT BKR
30/30
30/30
35/35
30/30
45/45
35/35
45/45
35/35
60/60
40/40
LEGENO @US
FLA -- Full Load Amps
LRA -- Locked Rotor Amps
MCA -- MinimumCircuitAmps
M©CP -- Maximum Overcurrent Protection
RLA -- Rated Load Amps
NOTES:
1. In compliance with NEC (National Electrical Code) requirements
for multimotor and combination load equipment (refer to NEC
Articles 430 and 440), the overcurrent protective device for the
unit shall be Power Supply fuse. The CGA (Canadian Gas
Association) units may be fuse or circuit breaker
2. Minimum wire size is based on 60 C copper wire. Ifother than
60 Cwire is used, or if length exceeds wire length in table,
determine size from NEC.
3. Unbalanced 3-Phase Supply Voltage
Never operate a motor where a phase imbalance in supply volt-
age is greater than 2%. Use the following formula to determine
the percentage of voltage imbalance
% Voltage imbalance
= 100 x max voltage deviation from average voltage
average voltage
Heater capacity (kW) based on heater voltage of 208v & 240v.
* If power distibution voltage to unit varies from rated heater
voltage, heater kW will vary accordingly.
EXAMPLE: Supply voltage is 230-3-60.
A B C AB = 228 v
BC = 231 v
AC = 227 v
Average Voltage = 228 + 231 + 227
3
= 68._6
3
= 229
Determine maximum deviation from average voltage.
AB) 229-228 = lv
BC) 231 - 229 2 v
(AC) 229- 227 = 2 v
Maximum deviation is 2 v.
Determine percent of voltage imbalance
2
% Voltage Imbalance = 100 x --
229
= 0.8%
This amount of phase imbalance is satisfactory as it is below the
maximum allowable 2%.
IMPORTANT: If the supply voltage phase imbalance is
more than 2%, contact your local electric utility company
immediately.
C03014
Fig. 13 - Electrical Data Legend
SPECIAL PROCEDURES FOR 208-V OPERATION
ELECTRICAL SHOCK HAZARD
Failure to follow this warning could result in personal injury
or death.
Make sure that the po``ver supply to the unit is switched OFF
before making any wiring changes. With disconnect switch
open, move yellow wire from transformer (3/16 in.) terminal
marked 230 to terminal marked 200. This retaps transformer
to primary voltage of 208 vac.
ELECTRICAL SHOCK HAZARD
Failure to follow this ``yarning could result in personal injury
or death.
Before making any wiring changes, make sm'e the gas supply
is switched off first. Tken switch off the po``ver supply to the
unit and install lockout tag.
Make lo``v voltage connections to 18 gauge ,,vires located in the
splice box.
CONTROL VOLTAGE CONNECTIONS
Use only Infinity User Interface for unit control. (For detailed
instructions for the low voltage connections, see the User Interface
installation guide.)
Remove knockout hole located in the heat section panel adjacent to
the service access panel. Remove the robber grommet from the
installer's packet and install grommet in the knockout opening.
Provide a drip loop before running wire through panel. Run the
low-voltage leads from the UI. through the inlet hole. and into unit
lo,,v-voltage splice box. Make low-voltage connections to
18-gauge ,,vires located in the splice box (See Fig. 12). Secure all
cut ,,vires, so that they do not interfere with operation of unit.
Step ll--Optional Accessories
OUTDOOR AIR THERMISTOR (OAT)
A 2-screw terminal strip is provided for connection of an outdoor
temperature thermistor. This strip is marked OAT. The installation
of an outdoor temperature sensor using the Infinity control board
OAT terminals is optional.
OAT input is used to supply outdoor temperature data for system
level functions and for temperature display on User Interface.
Using two wires of field supplied thermostat wire cable, wire one
lead of thermistor to one screw terminal and the other lead to
remaining screw terminal: there is no polarity to be observed. It is
strongly recommended that two ,,vires be used to connect the
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