21
1.6 – HEAT PUMP CAPACITIES
1.6.1 HEATING / COOLING CAPACITIES
See technical manual 10 12 202
1.6.2 CAPACITY CORRECTION ACCORDING GLYCOL RATIO
IMPORTANT: Use monopropylen glycol. A minimum rate of 15 to 20% is needed to avoid any risk of corrosion.
Curves use principle:
Choose the percentage of glycol according to the minimum temperature in order to protect the hydraulic circuit against frost and
then determine the coefficients to be applied to the capacity of the unit, the water flow rate and the pressure drop.
Cooling Mode:
Heating mode:
For current applications, the impact of glycol ratio can be ignored.
1.7 – AVAILABLE PRESSURES ON WATER CIRCUIT
These available pressures are indicated for the water flow to be set at the installation, according to the maximum water outlet
temperature (which is determined according to the application).
Please refer to part 3 for water flow setting.
Example:
-Protection at a outdoor temperature of -15°C gives 30%
glycol (“freezing point curve”).
-This percentage of glycol induces:
• A reduction coefficient of cooling capacity of 0.94.
• A water flow rate coefficient of 1.113 (flow must be
increased).
• A water pressure drop coefficient of 1.19 to be
applied for pressure drop calculation.
To Next Page
Loading...
