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PERFORMANCE DATA (CONT)
Wet Coil Air Delivery 50VT036--060 -- Downflow Discharge -- High Speed
Unit
External Static Pressure (IN. W.C.)
0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1.0
50VT036 CFM 1630 1593 1556 1526 1487 1442 1405 1365 1322 1288
50VT042 CFM 1630 1593 1556 1526 1487 1442 1405 1365 1322 1288
50VT048 CFM 2286 2222 2144 2068 1986 1905 1820 1737 1635 1531
50VT060 CFM 2113 2049 1979 1911 1840 1771 1681 1614 1524 1418
* Air delivery values are without air filter and are for wet coil.
Note: Deduct field ---supplied air filter pressure drop to obtain external static pressure available for ducting.
Economizer 1--in. Filter Pressure Drop (in. wc)
UNIT50VT PRESSURE DROP
024--030 0.20
036--060 0.25
Multiplication Factors
HEATER kW RATING VOLTAGE DISTRIBUTION MULTIPLICATION FACTOR
240
480
200
208
230
240
460
0.69
0.75
0.92
1.00
0.92
LEGEND
BF — Bypass Factor
e d b — E n t e r i n g D r y --- B u l b
Ewb — Entering Wet---Bulb
kW — Total Unit Power Input
SHC — Sensible Heat Ca pacity (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)
1.10 x cfm
t
ldb =
t
edb
--
Wet--- bulb temperature corresponding to enthalpy
air leaving evaporator coil (
h
lwb)
t
lwb =
total capacity (Btuh)
4.5 x cfm
h
lwb =
h
e w b ---
Where:
h
ewb = Enthalpy of air entering evaporator coil
4. The S HC is based on 805 F (26.6_C) edb temperature of air entering evapo-
rator coil. Below 805 F (26.6_C) edb, subtract (corr factor x cfm) from SHC.
Above 805 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 r equired to defr ost it.
Electric Heat Pressure Drop Table
Small Cabinet: 024--030 cfm
500 600 700 800 900 1000 1100 1200 1300 1400 1500 1600
5kw 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.02 0.04 0.06 0.07
7.5 kw 0.00 0.00 0.00 0.00 0.00 0.00 0.02 0.03 0.05 0.07 0.08 0.09
10 kw 0.00 0.00 0.00 0.00 0.00 0.02 0.04 0.06 0.07 0.09 0.10 0.11
15 kw 0.00 0.00 0.00 0.02 0.04 0.06 0.08 0.10 0.12 0.14 0.16 0.18
20 kw 0.00 0.00 0.02 0.04 0.06 0.08 0.09 0.11 0.13 0.15 0.17 0.19
Electric Heat Pressur e Dr op Table (in. wc)
Large Cabinet 036--060 cfm
1100 1200 1300 1400 1500 1600 1700 1800 1900 2000 2100 2200 2300 2400 2500
5kw 0.00 0.00 0.00 0.01 0.02 0.03 0.04 0.05 0.06 0.07 0.08 0.09 0.10 0.11 0.12
7.5 kw 0.00 0.00 0.01 0.02 0.03 0.04 0.05 0.06 0.07 0.08 0.09 0.10 0.11 0.12 0.13
10 kw 0.00 0.00 0.01 0.02 0.03 0.04 0.05 0.06 0.07 0.08 0.09 0.10 0.11 0.12 0.13
15 kw 0.00 0.02 0.03 0.04 0.05 0.06 0.07 0.08 0.09 0.10 0.11 0.12 0.13 0.14 0.15
20 kw 0.02 0.03 0.04 0.05 0.06 0.07 0.08 0.09 0.10 0.11 0.12 0.13 0.14 0.15 0.16
50VT Wet Coil Pressure Drop
Unit
Size
Standard CFM (S.C.F.M)
600 700 800 900 1000 1100 1200 1300 1400 1500 1600 1700 1800 1900 2000
024 0.06 0.07 0.08 0.09 0.10
030 0.12 0.15 0.19 0.23 0.27
036 0.07 0.11 0.18 0.26 0.35
042 0.04 0.07 0.10 0.15 0.21
048 0.11 0.14 0.17 0.22 0.28
060 0.10 0.17 0.23 0.31 0.36
50VT
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