Indoor & Outdoor Split Geothermal Comfort Systems
Heating
HE
LWT = EWT - GPM x 500
HC
LAT = EAT + CFM x1.08
Cooling
LWT = EWT + | HR |
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| LC = TC - SC | |
GPM x 500 |
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LAT (DB) = EAT (DB) - |
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| SC |
| S/T = | SC | |
CFM x1.08 | TC | ||||||
CFM | = airflow, cubic feet/minute | HWC | = Hot Water Generator (desuperheater) | |
EWT | = entering water temperature, ˚F |
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| capacity, Mbtuh |
GPM | = water flow in US gallons/minute | WPD | = Water coil pressure drop (psi & ft hd) | |
EAT | = entering air temperature, Fahrenheit | EER | = | Energy Efficiency Ratio |
| (dry bulb/wet bulb) |
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| = BTU output/Watt input |
HC | = air heating capacity, Mbtuh | COP | = | Coefficient of Performance |
TC | = total cooling capacity, Mbtuh |
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| = BTU output/BTU input |
SC | = sensible cooling capacity, Mbtuh | LWT | = leaving water temperature, °F | |
KW | = total power unit input, KiloWatts | LAT | = leaving air temperature, °F | |
HR | = total heat of rejection, Mbtuh | LC | = latent cooling capacity, Mbtuh | |
HE | = total heat of extraction, Mbtuh | S/T | = sensible to total cooling ratio | |
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GT-GS & GT-S Performance Correction Factors
| Heating Corrections |
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| Cooling Corrections |
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| Sens Clg Cap Multiplier - Entering DB °F |
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Ent Air DB | Htg Cap | Power | Heat of |
| Ent Air | Total Clg |
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| Power | Heat of | |
| 70 | 75 | 80 | 80.6 | 85 | 90 | 95 | |||||||||
°F |
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| Ext |
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60 |
| 1.019 | 0.896 | 1.054 |
| 60 | 0.881 | 0.943 | 1.067 | 1.192 | 1.240 | * | * | * | 0.983 | 0.899 |
65 |
| 1.010 | 0.948 | 1.028 |
| 65 | 0.940 | 0.797 | 0.952 | 1.106 | 1.125 | 1.261 | * | * | 0.991 | 0.949 |
68 |
| 1.004 | 0.980 | 1.011 |
| 66.2 | 0.976 | 0.693 | 0.868 | 1.043 | 1.063 | 1.217 | * | * | 0.997 | 0.980 |
70 |
| 1.000 | 1.000 | 1.000 |
| 67 | 1.000 | 0.624 | 0.812 | 1.000 | 1.023 | 1.188 | 1.343 | 1.352 | 1.000 | 1.000 |
75 |
| 0.997 | 1.059 | 0.979 |
| 70 | 1.012 |
| 0.697 | 0.820 | 0.835 | 0.944 | 1.067 | 1.257 | 1.002 | 1.010 |
80 |
| 0.993 | 1.118 | 0.957 |
| 75 | 1.024 |
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| 0.637 | 0.658 | 0.817 | 0.983 | 1.159 | 1.005 | 1.019 |
Rev. 5/2/00M
* Sensible capacity equals total capacity (no latent capacity) at conditions shown as "*"
ARI/ISO/ASHRAE
Carrier Indoor & Outdoor Split Geothermal Heat Pumps - Rev.: 08/10/05
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