Carrier 50HT-A07 - Page 23

23
Table 3 – Table 10 Unit Electrical Data (cont)
UNIT
N
O M . V --- P H --- H Z
IFM TYPE
ELECTRIC HEATER
PART NUMBER
CRHEATERXXXXXX
NOM
(kW)
APPLICATION
(kW)
SINGLE POINT OR JUNCTION KIT PART NUMBER
CRSINGLE***A00
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)
50HT**07
208/230---3--- 60
STD
102A00 6.5 4.9/6.0 --- --- --- ---
104B00 10.5 7.9/9.6 --- --- --- ---
105A00 16.0 12.0/14.7 --- --- 038 038
104B00,104B00 21.0 15.8/19.3 038 038 038 038
104B00,105A00 26.5 19.9/24.3 038 038 038 038
MED
102A00 6.5 4.9/6.0 --- --- --- ---
104B00 10.5 7.9/9.6 --- --- --- ---
105A00 16.0 12.0/14.7 --- --- 038 038
104B00,104B00 21.0 15.8/19.3 038 038 038 038
104B00,105A00 26.5 19.9/24.3 038 038 038 038
HIGH
102A00 6.5 4.9/6.0 --- --- --- ---
104B00 10.5 7.9/9.6 --- --- --- ---
105A00 16.0 12.0/14.7 --- --- 038 038
104B00,104B00 21.0 15.8/19.3 038 038 038 038
104B00,105A00 26.5 19.9/24.3 038 038 038 038
4 6 0 --- 3 --- 6 0
STD
106A00 6.0 5.5 --- --- --- ---
108A00 11.5 10.6 --- --- --- ---
109A00 14.0 12.9 --- --- --- ---
108A00,108A00 23.0 21.1 --- --- --- ---
108A00,109A00 25.5 23.4 --- --- --- ---
MED
106A00 6.0 5.5 --- --- --- ---
108A00 11.5 10.6 --- --- --- ---
109A00 14.0 12.9 --- --- --- ---
108A00,108A00 23.0 21.1 --- --- --- ---
108A00,109A00 25.5 23.4 --- --- --- ---
HIGH
106A00 6.0 5.5 --- --- --- ---
108A00 11.5 10.6 --- --- --- ---
109A00 14.0 12.9 --- --- --- ---
108A00,108A00 23.0 21.1 --- --- --- ---
108A00,109A00 25.5 23.4 --- --- --- ---
LEGEND:
CO --- Convenient outlet
DISC --- Disconnect
FLA --- Full load amps
IFM --- Indoor fan motor
LRA --- Locked rotor amps
MCA --- Minimum circuit amps
MOCP --- Maximum over current protection
P E --- Po w e r e x h a u s t
UNPWRD CO --- Unpowered convenient outlet
NOTES:
1. In compliance with NEC requirements for multimotor and combina-
tion load equipment (refer to NEC Articles 430 and 440), th e
overcurrent 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
percentage of voltage imbalance.
% Voltage Imbalance = 100 x
max voltage deviation from average voltage
average voltage
Example: Su pply voltage 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 Maximum deviation is 4 v...........
(BC) 231 – 227 = 4 v D etermine percent of voltage imbalance...........
% Voltage Imbalance = 100 x
4
227
= 1.76%
This amou n t of phase imbalance is satisfactory as it is below the maximum
allowable 2%.
IMPORTANT: If the supply voltage phase imbalance is more than 2%, con-
tact your local electric utility company immediately.
50HT