Carrier 40RFAA08 - Page 14

14
Legend and Notes for Tables 9-10
LEGEND
NOTES:
1. Minimum circuit amps (MCA) and maximum overcurrent protection
(MOCP) values are calculated in accordance with The NEC. Article
440.
2. Motor FLA values are established in accordance with Underwrit-
ers’ Laboratories (UL). Standard 1995.
3. Unbalanced 3-Phase Supply Voltage
Never operate a motor where a phase imbalance in supply voltage
is greater than 2%. Use the formula in the example (see column to
the right) to determine the percentage of voltage imbalance.
4. Installation with Accessory Electric Heaters 
Size the Field Power Wiring between the heater TB1 and the 40RF
indoor fan motor per NEC Article 430-28 (1) or (2) (depends on
length of conduit between heater enclosure and 40RF power entry
location). Install wires in field-installed conduit.
Example: Supply voltage is 230-3-60
Determine maximum deviation from average voltage.
(AB) 227-224 = 3 v
(BC) 231-227 = 4 v
(AC) 227-226 = 1 v
Maximum deviation is 4 v.
Determine percent of voltage imbalance.
This amount of phase imbalance is satisfactory as it is below the
maximum allowable 2%.
Table 9 — Electrical Data, Standard Motors — Two Speed
a
UNIT
NOMINAL
V-PH-Hz*
IFM
TYPE
UNIT VOLTAGE
RANGE
FAN MOTOR POWER SUPPLY
Min. Max. Hp kW FLA
Minimum
Circuit Amps
(MCA)
Maximum
Overcurrent
Protection
(MOCP)
40RFA*07
40RFQ*07
208/230-3-60
MED 187 253 2.4 1.76 6.4/5.8 8/8 15/15
HIGH 187 253 3.0 2.24 7.5/6.7 10/9 15/15
460-3-60
MED 414 506 2.4 1.76 3.0 4 15
HIGH 414 506 3.0 2.24 3.5 5 15
575-3-60
MED 518 632 2.4 1.76 2.5 4 15
HIGH 518 632 3.0 2.24 3.0 4 15
40RFA*08
40RFS*08
40RFQ*08
208/230-3-60
MED 187 253 2.4 1.76 6.4/5.8 8/8 15/15
HIGH 187 253 3.0 2.24 7.5/6.7 10/9 15/15
460-3-60
MED 414 506 2.4 1.76 3.0 4 15
HIGH 414 506 3.0 2.24 3.5 5 15
575-3-60
MED 518 632 2.4 1.76 2.5 4 15
HIGH 518 632 3.0 2.24 3.0 4 15
40RFS*10
208/230-3-60
MED 187 253 2.4 1.76 6.4/5.8 8/8 15/15
HIGH 187 253 3.0 2.24 7.5/6.7 10/9 15/15
460-3-60
MED 414 506 2.4 1.76 3.0 4 15
HIGH 414 506 3.0 2.24 3.5 5 15
575-3-60
MED 518 632 2.4 1.76 2.5 4 15
HIGH 518 632 3.0 2.24 3.0 4 15
40RFA*12
40RFS*12
40RFQ*12
208/230-3-60
MED 187 253 2.4 1.76 6.4/5.8 8/8 15/15
HIGH 187 253 3.0 2.24 7.5/6.7 10/9 15/15
460-3-60
MED 414 506 2.4 1.76 3.0 4 15
HIGH 414 506 3.0 2.24 3.5 5 15
575-3-60
MED 518 632 2.4 1.76 2.5 4 15
HIGH 518 632 3.0 2.24 3.0 4 15
NOTE(S):
a. See “Legend and Notes for Tables 9-10” on page 14.
Table 10 — Fan Contactor Coil Data
a
UNIT 40RF*
VOLTAGE
(vac)
MAXIMUM
HOLDING VA
07, 08, 12 24 10
NOTE(S):
a. See “Legend and Notes for Tables 9-10” on page 14
FLA — Full Load Amps
HACR — Heating, Air Conditioning, and Refrigeration
% Voltage
Imbalance
= 100 x
max voltage deviation from average voltage
average voltage
AB = 224 v
BC = 231 v
AC = 226 v
Average Voltage =
(224 + 231 + 226)
=
681
=227
33
% Voltage Imbalance = 100x
4
=1.78%
227
IMPORTANT: If the supply voltage phase imbalance is more than 2%,
contact your local electric utility company immediately.
A
B
C
MOTOR