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Legend and Notes for Table 50
LEGEND:
CO --- Convenient outlet
DISC --- Disconnect
FLA --- F ull load a mps
IFM --- Indoor fan motor
LRA --- Locked rotor amps
MCA --- Minimum circuit amps
MOCP --- Maximum ov er current protection
PE --- Power exhaust
UNPWR CO --- Unpo wered convenient outlet
NOTES:
1. In compliance with NEC requirements for multimotor and
combination load equipment (r efer to NE C Articles 430 and
440), the overcurrent protective device for the unit shall be
fuse or HACR breaker. C anadian units may be fuse or circuit
breaker.
2. Un balanced 3-Phase Supply Voltage
Never operate a motor where a phase imbalance in supply
voltag e is greater than 2%. Use the following formula to de-
termine the percentage of voltage imbalance.
% VoltageImbalance = 100x
max voltage deviationfromaveragevoltage
averagevoltage
Example: S upply v oltage is 230-3-60
AB = 224 v
BC = 231 v
AC = 226 v
Average Voltage =
(224+ 231+ 226)
=
681
3
3
= 227
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.
% VoltageImbalance =100 x
4
227
=1.76%
This amount of phase imbalance is satisfactory as it is below the
maximum allowable 2%.
IMPORTANT: If the supp ly voltage phase imbalance is more than
2%, contact y our local e lectric utility compa ny immedi ately.
APPENDIX V. WIRING DIAGRAM LIST
Wiring Diagrams
548J***A
SIZE VOLTAGE CONTROL POWER
04A
208/230---1---60 48TM501434.02 48TM501435.02
208/230---3---60 48TM501434.02 48TM501436.02
460---3---60 48TM501434.02 48TM501436.02
575---3---60 48TM501434.02 48TM501436.02
05A
208/230---1---60 48TM501434.02 48TM501435.02
208/230---3---60 48TM501434.02 48TM501436.02
460---3---60 48TM501434.02 48TM501436.02
575---3---60 48TM501434.02 48TM501436.02
06A
208/230---1---60 48TM501434.02 48TM501435.02
208/230---3---60 48TM501434.02 48TM501436.02
460---3---60 48TM501434.02 48TM501436.02
575---3---60 48TM501434.02 48TM501436.02
07A
208/230---3---60 48TM501434.02 48TM501436.0
460---3---60 48TM501434.02 48TM501436.0
575---3---60 48TM501434.02 48TM501436.0
All RTU---MP* 48TM501531.03
548J***D
SIZE VOLTAGE CONTROL POWER
08D
208/230---3---60 48TM501370.03 48TM501371.04
460---3---60 48TM501370.03 48TM501371.04
575---3---60 48TM501370.03 48TM501371.04
09D
208/230---3---60 48TM501370.03 48TM501371.04
460---3---60 48TM501370.03 48TM501371.04
575---3---60 48TM501370.03 48TM501371.04
All RTU---MP* 48TM501448.03
NOTE: Component arrangement on Control; Legend on Power Schematic
* The RTU --MP control label overlays a portion of the base unit controllabel. The base unitlabel drawing and the control option drawing are required to
provide a complete unit control diagram.
548J