Carrier 50HS024-060 Installation, Start-Up And Service Instructions Manual page 13

VOLTAGE
UNIT V-PH
RANGE
50HS (50 Hz)
Min
024 400-3 380
030 400-3 380
036 400-3 380
048 400-3 380
060 400-3 380
LEGEND
— — No Electric Heat
AWG — American Wire Gage
FLA — Full Load Amps
IFM — Indoor-Fan Motor
LRA — Locked Rotor Amps
MCA — Minimum Circuit Amps
MOCP — Maximum Over-Current Protection
OFM — Outdoor-Fan Motor
RLA — Rated Load Amps
*Electric heat capacity (kW) is based on heater voltages of 400 v. If
power distribution voltage to units varies from rated heater voltage,
see Table 5 on page 14.
†Fuse or circuit breaker.
NOTES:
1. The wire size and length is as follows:
MIN WIRE
UNIT
50HS
2
mm AWG 60 C
024-036 2.5
048, 060 4.0
2. Unbalanced 3-Phase Supply Voltage
Never operate a motor where a phase imbalance in supply voltage
is greater than 2%. Use the following formula to determine the per-
cent of voltage imbalance.
% Voltage Imbalance
max voltage deviation from average voltage
= 100 x
Table 4 — Accessory Electric Heater Packages — Single-Point Connection
UNIT ELECTRIC HEAT KIT
50HS PART NO. CPHEATER------*
021A00
024
022A00
021A00
030
022A00
021A00
036
022A00
021A00
048 022A00
023A00
021A00
060 022A00
023A00
LEGEND
FLA — Full Load Amps
*Electric heat kit provides single point wiring connections.
†Electric heat capacity (kW) is based on heater voltages of 400 v. If power distribution voltage to units
varies from rated heater voltage, see Table 5 on page 14.
Table 3 — Electrical Data
COMPRESSOR
Max RLA LRA
420 4.8 34
420 4.8 40
420 6.4 42
420 8.9 64
420 11.3 73
MAX WIRE LENGTH
M Ft
14 30.5 100
12 30.5 100
average voltage
ELECTRIC HEAT
(kW)†
400 V, 3 Ph
ELECTRIC HEAT
OFM IFM
FLA FLA
Nominal kW*
—
1.4 1.6 6.9
10.4
—
1.4 1.6 6.9
10.4
—
1.4 1.6 6.9
10.4
—
6.9
2.0 4.0
10.4
12.1
—
6.9
2.0 4.0
10.4
12.1
Example: Supply voltage is 400-3-50.
Average Voltage =
Determine maximum deviation from average voltage.
(AB) 397 – 393 = 4 v
(BC) 403 – 397 = 6 v
(AC) 397 – 396 = 1 v
Maximum deviation is 6 v.
Determine percent of voltage imbalance.
% Voltage Imbalance = 100 x
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.
HEATER
FLA
6.9 10.5
10.4 15.8
6.9 10.5
10.4 15.8
6.9 10.5
10.4 15.8
6.9 10.5
10.4 15.8
12.1 18.5
6.9 10.5
10.4 15.8
12.1 18.5
13
POWER SUPPLY
UNIT
kW
FLA MCA
— 3.1 9.0
10.5 9.4 22.1
15.8 12.9 28.7
— 3.8 9.0
10.5 9.6 22.1
15.8 13.1 28.7
— 4.8 11.0
10.5 10.3 24.1
15.8 13.8 30.7
— 5.6 17.1
10.5 11.5 31.6
15.8 15.0 38.3
18.5 16.7 41.6
— 8.3 20.0
10.5 12.5 31.0
15.8 16.0 37.6
18.5 17.7 41.0
AB = 393 v
BC = 403 v
AC = 396 v
393 + 403 + 396
3
1192
=
3
= 397
6
397
= 1.5%
MIN CIRCUIT
AMPACITY
FOR WIRE SIZING
22.1
28.7
22.1
28.7
24.1
30.7
31.6
38.3
41.6
31.0
37.6
41.0
MOCP†
10
25
30
10
25
30
15
25
35
25
35
40
45
25
35
40
45
MAX FUSE
OR CIRCUIT
BREAKER
25
30
25
30
25
35
35
40
45
35
40
45