Performance Data - Bryant 704C Product Data

PERFORMANCE DATA (CONT)
Heater kW Rating
Example: 15.0 kW (at 240v) heater on 208v
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 entering dry bulb (Tennessee Valley Authority [TVA] rating condi-
tions); all other at 80°F 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:
Multiplication Factors
Voltage Distribution V/3/60
200
208
240
230
240
= 15.0 (.75 mult factor)
= 11.25 capacity at 208v
Multiplication Factor
.69
.75
.92
1.00
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 edb, subtract (corr factor x cfm) from SHC.
Above 80° F 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.
14
h
lwb)