146
PERFORMANCE DATA — 542J
COOLING CAPACITIES
LEGEND
NOTES:
1. Direct interpolation is permissible. Do not extrapolate.
2. The following formulas may be used:
t
lwb
= Wet-bulb temperature corresponding to enthalpy of air leaving indoor
coil (h
lwb
)
Where: h
ewb
= Enthalpy of air entering indoor coil
3. SHC is based on 80 F edb temperature of air entering indoor coil.
Below 80 F edb, subtract (corr factor x cfm) from SHC.
Above 80 F edb, add (corr factor x cfm) to SHC.
Interpolation is permissible.
Correction Factor = 1.10 x (1 – BF) x (edb – 80).
LEGEND
NOTES:
1. Direct interpolation is permissible. Do not extrapolate.
2. The following formulas may be used:
t
lwb
= Wet-bulb temperature corresponding to enthalpy of air leaving indoor
coil (h
lwb
)
Where: h
ewb
= Enthalpy of air entering indoor coil
3. SHC is based on 80 F edb temperature of air entering indoor coil.
Below 80 F edb, subtract (corr factor x cfm) from SHC.
Above 80 F edb, add (corr factor x cfm) to SHC.
Interpolation is permissible.
Correction Factor = 1.10 x (1 – BF) x (edb – 80).
542J150 (12
1
/
2
Tons)
Temp (F)
Outdoor
Entering Air
(Edb)
Indoor Entering Air — Cfm/BF
3750/0.04 4500/0.05 5000/0.05 5625/0.06 6250/0.07
Indoor Entering Air — Ewb (F)
72 67 62 72 67 62 72 67 62 72 67 62 72 67 62
75
TC 167.0 154.0 140.0 171.0 158.0 144.0 173.0 159.0 146.0 171.0 162.0 148.0 173.0 161.0 151.0
SHC 79.6 100.0 120.0 85.0 108.0 131.0 87.5 114.0 138.0 94.5 120.0 146.0 97.7 127.0 150.0
kW 10.00 9.77 9.50 10.10 9.87 9.61 10.20 9.93 9.68 10.20 10.00 9.74 10.20 10.00 9.80
85
TC 160.0 148.0 133.0 164.0 151.0 137.0 167.0 154.0 140.0 168.0 155.0 143.0 166.0 157.0 146.0
SHC 77.6 98.9 118.0 82.0 107.0 129.0 86.1 113.0 136.0 89.6 118.0 142.0 95.3 125.0 146.0
kW 11.10 10.80 10.40 11.20 10.90 10.60 11.30 11.00 10.70 11.30 11.00 10.80 11.30 11.10 10.80
95
TC 155.0 141.0 127.0 157.0 144.0 131.0 160.0 146.0 133.0 161.0 149.0 137.0 163.0 149.0 140.0
SHC 76.1 96.3 115.0 80.3 105.0 126.0 84.4 110.0 132.0 86.5 117.0 137.0 91.7 121.0 140.0
kW 12.20 11.80 11.40 12.20 11.90 11.50 12.40 12.00 11.60 12.40 12.10 11.80 12.50 12.10 11.90
105
TC 147.0 133.0 120.0 150.0 137.0 124.0 152.0 138.0 127.0 153.0 140.0 131.0 154.0 141.0 134.0
SHC 73.6 93.3 112.0 78.5 102.0 123.0 81.6 108.0 127.0 85.1 114.0 131.0 88.6 120.0 134.0
kW 13.20 12.70 12.30 13.30 12.90 12.50 13.40 13.00 12.60 13.50 13.10 12.80 13.50 13.10 12.90
115
TC 140.0 126.0 112.0 141.0 129.0 118.0 144.0 130.0 121.0 144.0 131.0 125.0 146.0 133.0 128.0
SHC 71.4 90.3 109.0 75.1 99.1 117.0 78.9 104.0 121.0 81.9 110.0 125.0 87.0 117.0 128.0
kW 14.20 13.70 13.20 14.30 13.90 13.50 14.40 14.00 13.70 14.50 14.00 13.90 14.60 14.10 14.00
125
TC 131.0 118.0 105.0 134.0 120.0 111.0 135.0 122.0 115.0 137.0 123.0 118.0 136.0 124.0 121.0
SHC 68.1 87.6 105.0 73.5 96.4 111.0 75.7 102.0 115.0 80.7 108.0 118.0 83.4 113.0 121.0
kW 15.20 14.70 14.10 15.40 14.90 14.50 15.40 14.90 14.70 15.60 15.00 14.90 15.60 15.10 15.00
BF — Bypass Factor
Edb — Entering Dry-Bulb
Ewb — Entering Wet-Bulb
kW — Compressor Motor Power Input
SHC — Gross Sensible Heat Capacity (1000 Btuh)
TC — Gross Total Capacity (1000 Btuh)
t
ldb
=t
edb
–
sensible capacity (Btuh)
1.10 x cfm
h
lwb
= h
ewb
–
total capacity (Btuh)
4.5 x cfm
BYPASS
FACTOR
(BF)
ENTERING AIR DRY-BULB TEMP (F)
79 78 77 76 75 under 75
81 82 83 84 85 over 85
Correction Factor
.05 1.04 2.07 3.11 4.14 5.18
Use formula
shown below.
.10 .98 1.96 2.94 3.92 4.90
.20 .87 1.74 2.62 3.49 4.36
.30 .76 1.53 2.29 3.05 3.82
542J180 (15 Tons)
Temp (F)
Outdoor
Entering Air
(Edb)
Indoor Entering Air — Cfm/BF
4500/0.06 5250/0.08 6000/0.10 6750/0.10 7500/0.12
Indoor Entering Air — Ewb (F)
72 67 62 72 67 62 72 67 62 72 67 62 72 67 62
75
TC 210.0 192.0 173.4 216.0 196.6 178.4 220.0 202.0 182.2 222.0 204.0 185.6 224.0 206.0 190.2
SHC 100.6 125.2 148.2 106.0 134.0 160.6 110.6 143.0 172.2 115.0 151.2 183.2 120.2 158.2 190.0
kW 13.58 13.12 12.66 13.76 13.28 12.84 13.88 13.44 12.98 13.96 13.52 13.10 14.02 13.60 13.26
85
TC 202.0 183.0 164.4 208.0 187.8 169.0 212.0 191.4 172.8 212.0 194.0 177.2 214.0 195.8 182.2
SHC 98.0 121.8 144.2 103.8 131.2 156.4 109.0 140.0 168.6 112.0 148.0 177.0 116.2 155.6 182.2
kW 14.86 14.32 13.78 15.08 14.52 13.98 15.22 14.66 14.14 15.26 14.78 14.30 15.34 14.86 14.50
95
TC 192.4 173.2 155.0 196.2 177.8 159.2 200.0 180.8 163.4 202.0 183.4 169.0 204.0 185.4 174.2
SHC 94.8 118.0 140.0 100.2 127.4 152.6 105.6 136.4 163.4 110.6 144.8 169.0 114.2 153.2 173.8
kW 16.16 15.52 14.88 16.32 15.72 15.10 16.48 15.88 15.30 16.62 16.00 15.54 16.64 16.12 15.76
105
TC 182.0 163.0 145.0 186.4 167.0 149.4 188.6 170.0 155.4 191.0 172.2 160.8 193.0 173.8 165.2
SHC 91.0 114.2 135.2 96.8 123.6 147.6 101.8 132.6 155.2 107.2 141.2 160.6 112.2 149.6 165.2
kW 17.36 16.64 15.92 17.58 16.86 16.16 17.70 17.04 16.48 17.84 17.18 16.74 17.94 17.28 16.96
115
TC 171.2 152.4 134.8 175.0 156.2 140.6 177.8 158.8 146.8 179.4 160.8 152.2 179.6 162.2 156.4
SHC 87.4 110.2 130.8 92.6 119.4 140.6 98.8 128.2 146.8 103.6 136.8 151.8 107.2 144.6 156.2
kW 18.54 17.72 16.90 18.76 17.94 17.24 18.94 18.12 17.60 19.02 18.28 17.90 19.04 18.38 18.16
125
TC 159.4 141.2 125.0 162.8 143.8 132.0 165.6 147.0 137.8 166.6 148.8 143.0 168.2 150.0 146.8
SHC 83.6 105.8 125.0 89.0 115.0 131.8 94.4 123.6 137.8 99.8 132.2 142.8 105.0 139.6 146.6
kW 19.64 18.74 17.88 19.86 19.00 18.34 20.00 19.12 18.72 20.20 19.28 19.00 20.20 19.40 19.28
BF — Bypass Factor
Edb — Entering Dry-Bulb
Ewb — Entering Wet-Bulb
kW — Compressor Motor Power Input
SHC — Gross Sensible Heat Capacity (1000 Btuh)
TC — Gross Total Capacity (1000 Btuh)
t
ldb
=t
edb
–
sensible capacity (Btuh)
1.10 x cfm
h
lwb
= h
ewb
–
total capacity (Btuh)
4.5 x cfm
BYPASS
FACTOR
(BF)
ENTERING AIR DRY-BULB TEMP (F)
79 78 77 76 75 under 75
81 82 83 84 85 over 85
Correction Factor
.05 1.04 2.07 3.11 4.14 5.18
Use formula
shown below.
.10 .98 1.96 2.94 3.92 4.90
.20 .87 1.74 2.62 3.49 4.36
.30 .76 1.53 2.29 3.05 3.82
