Performance Data - Payne PY3G Series Product Data

PERFORMANCE DATA (CONT)
* At 75°F (24°C) entering dry bulb---Tennessee Valley Authority (TVA) rating conditions; all others at 80
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
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:
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 (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.
h
lwb)
F (27°C) dry bulb.
°
19