34
50TFF007-014
LEGEND
*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
EXAMPLE: Supply voltage is 400-3-50.
AB = 393 v
BC = 403 v
AC = 396 v
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.
This amount of phase imbalance is satisfactory as it is below the maxi-
mum allowable 2%.
UNIT
50TFF
NOMINAL
VOLTAGE
(50 Hz)
VOLTAGE
RANGE
COMPR
(ea)
OFM
(ea)
IFM ELECTRIC HEAT* POWER SUPPLY
MINIMUM UNIT
DISCONNECT
Min Max RLA LRA FLAFLA
Nominal
kW†
FLA MCA MOCP** FLA LRA
007
400
(3 phase)
360 440 9.9 72.0 0.6 2.6
— — 18.4 25 18
109
4.2 7.2 18.4 25 18
8.0 13.8 18.4 25 18
9.7 16.8 20.8 25 19
16.0 27.8 32.1 35 30
17.7 30.7 34.6 35 32
008
400
(3 phase)
360 440 8.9 42.0 0.6 2.6
— — 23.8 30 25
103
9.7 13.9 23.8 30 25
11.5 16.5 23.9 25 25
19.3 27.8 38.1 40 35
22.9 33.1 44.6 45 41
29.0 41.8 55.5 60 51
009
400
(3 phase)
360 440 8.3 69.0 0.6 2.6
— — 22.5 25 23
162
9.7 13.9 22.5 25 23
11.5 16.5 23.9 25 23
19.3 27.8 38.1 40 35
22.9 33.1 44.6 45 41
29.0 41.8 55.5 60 51
012
400
(3 phase)
360 440 8.9 64.0 0.6 2.6
— — 23.8 30 25
152
9.7 16.5 23.9 30 25
19.3 27.8 38.1 40 35
22.9 33.1 44.6 45 41
29.0 41.8 55.5 60 51
34.7 50.1 65.9 70†† 61
014
400
(3 phase)
360 440 10.4 73.0 0.6 4.8
— — 29.4 35 31
192
11.5 16.5 29.4 35 31
19.3 27.8 40.8 45 38
22.9 33.1 47.3 50 44
29.0 41.8 58.2 60 54
34.7 50.1 68.6 70†† 63
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
=100x
max voltage deviation from average voltage
average voltage
Average Voltage =
393 + 403 + 396
3
=
1192
3
= 397
Average Voltage =
393 + 403 + 396
3
IMPORTANT: If the supply voltage phase imbalance is more than
2%, contact your local electric utility company immediately.
Electrical data
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