GeoSmart ECO-Y, Installation Manual, Page: 35 / 40

35
ECO-Y INSTALLATION MANUAL
Reference Calculations
Heating Calculations: Cooling Calculations:
LWT = EWT +
LAT (DB) = EAT (DB) -
LC = TC - SC
S/T =
HR
GPM x 500
SC
CFM x 1.08
SC
TC
LWT = EWT -
LAT = EAT +
TH = HC + HWC
HE
GPM x 500
HC
CFM x 1.08
Legend and Notes
ABBREVIATIONS AND DEFINITIONS:
CFM = airflow, cubic feet/minute
EWT = entering water temperature, Fahrenheit
GPM = water flow in gallons/minute
WPD = water pressure drop, PSI and feet of water
EAT = entering air temperature, Fahrenheit
(dry bulb/wet bulb)
HC = air heating capacity, MBTUH
TC = total cooling capacity, MBTUH
SC = sensible cooling capacity, MBTUH
KW = total power unit input, kilowatts
HR = total heat of rejection, MBTUH
HE = total heat of extraction, MBTUH
HWC = hot water generator capacity, MBTUH
EER = Energy Efficient Ratio
= BTU output/Watt input
COP = Coefficient of Performance
= BTU output/BTU input
LWT = leaving water temperature, °F
LAT = leaving air temperature, °F
TH = total heating capacity, MBTUH
LC = latent cooling capacity, MBTUH
S/T = sensible to total cooling ratio
HE/HR Table
Model GPM
Heat of Extraction Heat of Rejection
30°F 50°F 70°F 90°F 30°F 50°F 70°F 90°F 110°F
024
3.0 14.7 19.4 23.6 28.2 27.8 26.2
4.5 10.7 15.6 20.5 24.8 26.2 28.3 27.9 26.1 24.3
6.0 10.8 15.9 20.9 25.3 26.4 28.4 28.0 26.2 24.3
030
4.0 14.7 19.4 23.6 28.2 27.8 26.2
6.0 10.7 15.6 20.5 24.8 26.2 28.3 27.9 26.1 24.3
8.0 10.8 15.9 20.9 25.3 26.4 28.4 28.0 26.2 24.3
036
5.0 23.8 31.3 37.6 41.2 42.4 40.6
7.0 17.7 24.9 32.6 39.2 34.7 41.1 42.3 40.5 37.8
9.0 18.1 25.5 33.2 39.8 35.0 41.5 42.6 40.7 38.0
042
5.0 27.2 33.7 40.0 50.3 51.4 48.9
8.0 21.0 28.5 35.5 42.4 47.0 50.5 51.7 49.3 46.1
11.0 21.4 29.3 36.6 43.9 47.3 50.8 51.9 49.4 46.1
048
6.0 35.1 43.9 51.2 60.7 60.7 57.3
9.0 26.8 36.7 46.3 54.3 56.3 60.9 61.0 57.6 54.0
12.0 27.3 37.7 47.7 56.2 56.6 61.3 61.3 57.7 54.0
060
9.0 43.1 55.1 63.7 84.6 82.7 77.7
12.0 30.8 44.4 56.2 67.6 80.2 84.4 83.0 77.5 73.0
15.0 31.8 45.3 58.6 68.5 80.8 84.7 82.6 77.7 73.1
070
12.0 51.4 65.6 76.5 92.7 91.1 84.3
15.0 37.2 52.7 68.4 81.2 83.4 92.8 91.0 84.0 77.9
18.0 37.3 53.2 69.5 83.0 83.8 93.5 91.9 85.0 78.8
12/4/2009