WaterFurnace Versatec Base - Manual (Page 46)

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VERSATEC BASE 50Hz SERIES INSTALLATION MANUAL
Reference Calculations
Notes (Refer to Performance Data tables)
• Performance ratings are based on 27°C DB / 19°C WB EAT for cooling and 20°C DB EAT for heating.
• Three flow rates are shown for each unit. The lowest flow rate shown is used for geothermal open loop/well water
systems with a minimum of 10°C EWT. The middle flow rate shown is the minimum geothermal closed loop flow rate.
The highest flow rate shown is optimum for geothermal closed loop systems and the suggested flow rate for boiler/
tower applications.
• The hot water generator numbers are based on a flow rate of 7.16 ml/s per kW of rated capacity with an EWT of 32°C.
• Entering water temperatures below 4.5°C assumes 15% antifreeze solution.
• For non-standard EAT conditions, apply the appropriate correction factors on (Refer to Correction Factor Tables).
• Interpolation between EWT, WF and AF data is permissible.
Heating Calculations: Cooling Calculations:
LWT = EWT +
LAT(DB) = EAT(DB) -
LC = TC - SC
S/T =
HR
WF x 4.2
SC
AF x 1.08
SC
TC
HE
WF x 4.2
LWT = EWT -
LAT = EAT +
TH = HC + HWC
HC
AF x 1.08
Note: Use 4.1 for 15% Methanol/water or Environol solution.