Multiplication Factors - Carrier 50SZ Series Product Data

PERFORMANCE DATA (CONT)
UNIT 50SZ
024- -030
036- -060
HEATER kW RATING
240
Exaqmple: 20 kW (at 240v) heater on 230v
= 20.0 (.92 mult factor)
= 18.4 kW capacity at 230v
LEGEND
BF— Bypass Factor
edb— Entering Dry--- Bulb
Ewb — Entering Wet--- Bulb
kW — Total Unit Power Input
SHC — Sensible Heat Capacity (1000 Btuh)
TC — Total Capacity (1000 Btuh) (net)
rh — Relative Humidity
Shading indicates Integrated Ratings
NOTES:
1. Ratings are net; they account for the effects of the evaporator--- fan motor power and heat.
2. Direct interpolation is permissible. Do not extrapolate.
3. The following formulas may be used:
Sensible capacity (Btuh)
t t ---
ldb = edb
1.10 x cfm
Wet---bulb temperature corresponding to enthalpy
t
lwb =
air leaving evaporator coil (
total capacity (Btuh)
h h
lwb = ewb ---
4.5 x cfm
h
Where: ewb = Enthalpy of air entering evaporator coil
4. The SHC is based on 80_F edb temperature of air entering evaporator coil.
Below 80_F (26.6_C) edb, subtract (corr factor x cfm) from SHC.
Above 80_F (26.6 C) edb, add (corr factor x cfm) to SHC.
_
Correction Factor = 1.10 x (1 --- BF) x (edb --- 80).
5. Integrated capacity is maximum (instantaneous) capacity less the effect of frost on the oudoor coil and
the heat required to defrost it.
ECONOMIZER 1 ---IN. FILTER PRESSURE DROP (IN. WC)

MULTIPLICATION FACTORS

h
lwb)
VOLTAGE DISTRIBUTION
V/3/60
200
208
230
240
17
PRESSURE DROP
0.20
0.25
MULTIPLICATION FACTOR
.69
.75
.92
1.00