WaterFurnace Envision2 - Manual (Page 45)

45
ENVISION 2 COMPACT - 50 HZ INSTALLATION MANUAL
NOTE: * When using water. Use 4.1 for 15% methanol/water
or Environol solution.
Reference Calculations
Heating Calculations: Cooling Calculations:
LWT = EWT +
LAT (DB) = EAT (DB) -
LC = TC - SC
S/T =
HR
WF x 500
SC
AF x 1.08
SC
TC
LWT = EWT -
LAT = EAT +
TH = HC + HW
HE
WF x 500
HC
AF x 1.08
ABBREVIATIONS AND DEFINITIONS:
COP = coefficient of performance
EER = cooling energy efficiency (TC/kW)
ELT = entering load fluid temperature
EST = entering source fluid temperature to heat pump
FLA = full load amps
FtHd = pressure drop in feet of head
gpm = US gallon per minute
HC
= heating capacity in kW
HE = heat of extraction in kW
HR = heat rejected in kW
kPa = kilopascal
kW = kilowatt
L/s = liters per second
LLT = leaving load fluid temperature from heat pump
LRA = locked rotor amps (starting current)
LST = leaving source fluid temperature from heat pump
LWPD = load heat exchanger water pressure drop
MCC = maximum continuous current
PD =
pressure drop
psi = pressure drop in pounds per square inch
P/T = Pressure/Temperature
RLA = run load amps
TC
= total cooling capacity in kW
W = Watt
CONVERSIONS:
x°F = (x - 32)/1.8°C
1 bar = 100 kPa
1 gpm = 0.0631 L/s
1 US Gallon = 3.785412 L
1 Btu/h
= 0.29037 W
Legend