International comfort products FAS Series, Руководство по установке

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Specifications subject to change without notice.
508 01 1603 01
Legend and Notes for Tables 14 through 17
LEGEND
*Motors are designed for satisfactory operation within 10% of normal
voltage shown. Voltages should not exceed the limits shown in the Volt-
age Limits column.
NOTES:
1. Minimum circuit amps (MCA) values are calculated in accordance
with The NEC. Article 440.
2. Motor FLA values are established in accordance with Underwriters’
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 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 FAS/
FHS indoor fan motor per NEC Article 430-28 (1) or (2) (depends
on length of conduit between heater enclosure and FAS/FHS
power entry location). Install wires in field-installed conduit.
% Voltage Im b alance:
Example: S upply voltage is 2 3 0- 3 -60
Determine maximum deviation from average voltage.
(AB) 227-224 =
3 v
(BC) 2 3 1-227 = 4 v
(AC) 227-226 = 1 v
Maximum deviation is 4 v.
Determine percent of voltage im
b alance.
This amount of phase im b alance is satisfactory as it is b elow the maxi-
mum allowa b le 2%.
NOTE: Check all factory and field electrical connections for tightness.
Fig. 17 — Unit Wiring
FLA — Full Load Amps
= 100 x
max voltage deviation from average voltage
average voltage
AB = 224 v
BC = 2
3 1 v
AC = 226 v
Average Voltage =
(224 + 2 3 1 + 226)
=
6 8 1
= 227
3 3
% Voltage Im b alance = 100x
4
= 1.7 8 %
227
IMPORTANT: If the supply voltage phase im b alance is more than 2%,
contact your local electric utility company immediately.
A B C
MOTOR