Electrical Data - Carrier 50TFF007-014 Product Data

Electrical data

NOMINAL
UNIT
VOLTAGE
50TFF
(50 Hz)
Min
400
007 360
(3 phase)
400
008 360
(3 phase)
400
009 360
(3 phase)
400
012 360
(3 phase)
400
014 360
(3 phase)
LEGEND
FLA — Full Load Amps
HACR — Heating, Air Conditioning and Refrigeration
IFM — Indoor (Evaporator) Fan Motor
LRA — Locked Rotor Amps
MCA — Minimum Circuit Amps
MOCP — Maximum Overcurrent Protection
NEC — National Electrical Code (U.S.A.)
OFM — Outdoor (Condenser) Fan Motor
RLA — Rated Load Amps
*Heater capacity (kW) is based on heater voltage of 400 v. If power
distribution voltage to unit varies from rated heater voltage, heater
kW will vary accordingly.
†Heaters are field installed only.
**Fuse or HACR circuit breaker.
††Fusing in single point box provides the required branch circuit
protection.
NOTES:
1. In compliance with NEC requirements (U.S.A. Standard) for multimo-
tor and combination load equipment (refer to NEC Articles 430 and
440), the overcurrent protective device for the unit shall be fuse or
HACR breaker.
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 percent
of voltage imbalance.
% Voltage imbalance
max voltage deviation from average voltage
= 100 x
average voltage
34
VOLTAGE COMPR
RANGE (ea)
Max RLA LRA
440 9.9 72.0
440 8.9 42.0
440 8.3 69.0
440 8.9 64.0
440 10.4 73.0
50TFF007-014
OFM
IFM ELECTRIC HEAT*
(ea)
Nominal
FLA FLA
kW†
—
4.2
8.0
0.6 2.6
9.7
16.0
17.7
—
9.7
11.5
0.6 2.6
19.3
22.9
29.0
—
9.7
11.5
0.6 2.6
19.3
22.9
29.0
—
9.7
19.3
0.6 2.6
22.9
29.0
34.7
—
11.5
19.3
0.6 4.8
22.9
29.0
34.7
EXAMPLE: Supply voltage is 400-3-50.
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 voltage imbalance.
Average Voltage =
This amount of phase imbalance is satisfactory as it is below the maxi-
mum allowable 2%.
IMPORTANT: If the supply voltage phase imbalance is more than
2%, contact your local electric utility company immediately.
POWER SUPPLY
FLA MCA MOCP**
— 18.4 25
7.2 18.4 25
13.8 18.4 25
16.8 20.8 25
27.8 32.1 35
30.7 34.6 35
— 23.8 30
13.9 23.8 30
16.5 23.9 25
27.8 38.1 40
33.1 44.6 45
41.8 55.5 60
— 22.5 25
13.9 22.5 25
16.5 23.9 25
27.8 38.1 40
33.1 44.6 45
41.8 55.5 60
— 23.8 30
16.5 23.9 30
27.8 38.1 40
33.1 44.6 45
41.8 55.5 60
50.1 65.9 70††
— 29.4 35
16.5 29.4 35
27.8 40.8 45
33.1 47.3 50
41.8 58.2 60
50.1 68.6 70††
AB = 393 v
BC = 403 v
AC = 396 v
393 + 403 + 396
Average Voltage =
1192
=
3
= 397
393 + 403 + 396
3
MINIMUM UNIT
DISCONNECT
FLA LRA
18
18
18
109
19
30
32
25
25
25
103
35
41
51
23
23
23
162
35
41
51
25
25
35
152
41
51
61
31
31
38
192
44
54
63
3