68
NOTE:
Voltage to compressor terminals during operation must
b
e within volt-
age range indicated on unit nameplate. On 3-phase units, voltages
b
etween phases must
b
e
b
alanced within 2% and the current within
10%. Use the formula shown
b
elow to determine the percent of voltage
im
b
alance.
Operation on improper line voltage or excessive phase im
b
alance con-
stitutes a
b
use and may cause damage to electrical components. Such
operation would invalidate any applica
b
le Carrier warranty.
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 im
b
alance.
This amount of phase im
b
alance is satisfactory as it is
b
elow the maxi-
mum allowa
b
le 2%.
Table C — Electric Heat — Electrical Data 50LC**17
UNIT 50LC
NOM.
V-Ph-Hz
IFM TYPE
ELECTRIC
HEATER PART
NUMBER
CRHEATER***A00
VERT/HORZ
NOM PWR
(kW)
APP PWR
(kW)
SINGLE POINT KIT PART NUMBER CRSINGLEXXXA00
NO C.O. or UNPWRD C.O.
w/PWRD C.O.
NO P.E.
w/ P.E.
(pwrd fr/
unit)
NO P.E.
w/ P.E.
(pwrd fr/
unit)
17
208/230-3-
60
STD
279/270A00
25.0
18.8/23.0
—
—
—
—
280/271A00
50.0
37.6/45.9
056
056
056
056
281/272A00
75.0
56.3/68.9
056
056
056
056
MED
279/270A00
25.0
18.8/23.0
—
—
—
—
280/271A00
50.0
37.6/45.9
056
056
056
056
281/272A00
75.0
56.3/68.9
056
056
056
056
HIGH
279/270A00
25.0
18.8/23.0
—
—
—
056
280/271A00
50.0
37.6/45.9
056
056
056
056
281/272A00
75.0
56.3/68.9
056
056
056
056
ULTRA
HIGH
279/270A00
25.0
18.8/23.0
—
056
056
056
280/271A00
50.0
37.6/45.9
056
056
056
056
281/272A00
75.0
56.3/68.9
056
056
056
056
460-3-60
STD
282/273A00
25.0
23.0
—
—
—
—
283/274A00
50.0
45.9
—
057
057
057
284/275A00
75.0
68.9
057
057
057
057
MED
282/273A00
25.0
23.0
—
—
—
—
283/274A00
50.0
45.9
057
057
057
057
284/275A00
75.0
68.9
057
057
057
057
HIGH
282/273A00
25.0
23.0
—
—
—
—
283/274A00
50.0
45.9
057
057
057
057
284/275A00
75.0
68.9
057
057
057
057
ULTRA
HIGH
282/273A00
25.0
23.0
—
—
—
—
283/274A00
50.0
45.9
057
057
057
057
284/275A00
75.0
68.9
057
057
057
057
575-3-60
STD
285/276A00
24.8
22.8
—
—
—
—
286/277A00
49.6
45.6
—
057
—
057
287/278A00
74.4
68.3
057
057
057
057
MED
285/276A00
24.8
22.8
—
—
—
—
286/277A00
49.6
45.6
—
057
057
057
287/278A00
74.4
68.3
057
057
057
057
HIGH
285/276A00
24.8
22.8
—
—
—
—
286/277A00
49.6
45.6
057
057
057
057
287/278A00
74.4
68.3
057
057
057
057
ULTRA
HIGH
285/276A00
24.8
22.8
—
—
—
—
286/277A00
49.6
45.6
057
057
057
057
287/278A00
74.4
68.3
057
057
057
057
LEGEND
APP PWR
— 208 / 230V / 460V / 575V
C.O.
— Convenience Outlet
IFM
— Indoor Fan Motor
NOM PWR
— 240V / 480V / 600V
P.E.
— Power Exhaust
PWRD
— Powered Convenience Outlet
UNPWRD
— Unpowered Convenience Outlet
% Voltage
Im
b
alance
= 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 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
APPENDIX B — PHYSICAL DATA
Summary of Contents for 50LC 14
Page 26: ...26 Fig 34 50LC 14 26 Control Wiring Diagram...
Page 27: ...27 Fig 35 50LC 14 26 RTU Open Control Wiring Diagram...
Page 28: ...28 Fig 36 50LC 14 20 208 230V 3 Phase Power Wiring Diagram...
Page 29: ...29 Fig 37 50LC 24 26 208 230V 3 Phase Power Wiring Diagram...
Page 30: ...30 Fig 38 50LC 14 26 460V 575V 3 Phase Power Wiring Diagram...