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68
Legend and Notes for Tables P-X.
LEGEND
NOTES:
1. In compliance with NEC requirements for multimotor and combina-
tion load equipment (refer to NEC Articles 430 and 440), the over-
current protective device for the unit shall be fuse or HACR
breaker. Canadian units may be fuse or circuit 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 per-
centage of voltage imbalance.
%
Voltage Imbalance:
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 maxi-
mum allowable 2
%
.
NOTE: Check all factory and field electrical connections for tightness.
Table R — 50KC**06 (5 Tons) Cooling
v-Ph-Hz
UNIT VOLTAGE
COMP 1
OFM (ea)
IFM
RANGE
RLA
LRA
WATTS
FLA
TYPE
EFF at Full
Load
FLA
MIN
MAX
208-1-60
187
253
25.0
134
325
1.4
DD-STD
78%
7.4
325
1.4
MED
76%
7.0
230-1-60
187
253
25.0
134
325
1.4
DD-STD
78%
7.4
325
1.4
MED
76%
7.0
208-3-60
187
253
15.9
110
325
1.4
DD-STD
78%
7.4
325
1.4
MED
89%
8.4
325
1.4
HIGH
89%
8.4
230-3-60
187
253
15.9
110
325
1.4
DD-STD
78%
7.4
325
1.4
MED
89%
8.3
325
1.4
HIGH
89%
8.3
460-3-60
414
506
7.0
52
325
0.9
DD-STD
78%
4.0
325
0.9
MED
89%
4.2
325
0.9
HIGH
89%
4.2
575-3-60
51
8
633
5.1
40
325
0.9
DD-STD
78%
4.0
325
0.9
MED
77%
2.8
325
0.9
HIGH
77%
2.8
BRKR
—
Circuit breaker
C.O.
—
Convenience outlet
DISC
—
Disconnect
FLA
—
Full load amps
IFM
—
Indoor fan motor
LRA
—
Locked rotor amps
MCA
—
Minimum circuit amps
P.E.
—
Power exhaust
pwrd fr/ unit —
Powered from unit
PWRD C.O.
—
Powered convenience outlet
UNPWR C.O. —
Unpowered convenience outlet
= 100 x
max voltage deviation from average voltage
average voltage
AB = 224 v
BC = 231 v
AC = 226 v
Average Voltage
=
(224 + 231 + 226)
=
6
8
1
= 227
3
3
%
Voltage Imbalance = 100x
4
= 1.7
8%
227
IMPORTANT: If the supply voltage phase imbalance is more than 2
%
,
contact your local electric utility company immediately.
A
B
C
MOTOR
Summary of Contents for Puron R-410A
Page 29: ...29 Fig 44 RTU Open Overlay for Economizer Wiring ...
Page 30: ...30 Fig 45 VFD Overlay for W2770 Controller Wiring ...
Page 50: ...50 Fig 63 50KC Typical Unit Wiring Diagram Power 06A 208 230 3 60 ...
Page 51: ...51 Fig 64 50KC Unit Wiring Diagram Control A06 ...
Page 77: ...77 Fig C Unit Wiring Diagram Power for Sizes A04 and A06 208 230 1 60 ...
Page 78: ...78 Fig D Unit Wiring Diagram Power for Size A05 208 230 1 60 ...
Page 79: ...79 Fig E Unit Wiring Diagram Power for Sizes A04 A06 208 230 3 60 460 3 60 575 3 60 ...