Performance Data (Cont); Multiplication Factors - Carrier 50XT Product Data

PERFORMANCE DATA (CONT)

Multiplication Factors

Heater kW Voltage Distribution
Rating V/3/60
200
208
240
230
240
LEGEND
BF— Bypass Factor
edb— Entering Dry- -Bulb
Ewb— Entering Wet- -Bulb
kW — Total Unit Power Input
ldb— Leaving Dry- -Bulb
lwb— Leaving Wet- -Bulb
SHC— Sensible Heat Capacity (1000 Btuh)
TC — Total Capacity (1000 Btuh) (net)
*At 75°F (23.8°C) entering dry bulb (Tennessee Valley Authority
[TVA] rating conditions); all other at 80°F (26.6°C) entering dry
bulb.
COOLING 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:
Example: 15.0 kW (at 240v) heater on 208v
Multiplication Factor
.69
.75
.92
1.00
Where:
4. The SHC is based on 80_F (26.6_C) 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 outdoor coil and the heat required to defrost it.
29
= 15.0 (.75 mult factor)
= 11.25 capacity at 208v
Sensible capacity (Btuh)
1.10 x cfm
t t --
ldb = edb
Wet--- bulb temperature corresponding to enthalpy
t
lwb =
air leaving evaporator coil (
total capacity (Btuh)
h h
lwb = ewb ---
4.5 x cfm
h
ewb = Enthalpy of air entering evaporator coil
h
lwb)