Technical information

YLHA SELECTION EXAMPLE
A YLHA heat pump operating at a 35°C ambient temperature should chill water from 13°C to 7°C, with
a 112 kW cooling capacity.
A 110 kW heating capacity is required in 5°C design ambient temperature and a hot water output tem‐
perature of 40°C.
The fouling factor is 0.044 m
2
°C/kW, with the unit operating at sea level (no corrections). With a quick
glance of capacity Tables 3 and 5, we see that a YLHA 120 heat pump gives the approximate required
capacities of:
• Cooling capacity = 114 kW
• Total unit absorbed power = 43.2 kW
• Cold water temperature = 13 °C to 7 °C (Temp. diff. of 6 °C)
• Hot and cold water flow = 16 340/h
• Heating capacity = 110.1 kW
• Total unit absorbed power in heat mode = 35.8 kW
• Hot water output temperature = 40°C
Hot water temp. dif‐
ferential
=
110.1 x 860
= 5.8 °C
16 340
Thus, hot water return temperature is = 34.2°C
All values are within operating limits:
• Available pressure in hydraulic circuit of a unit with pack:
• From Table 6 we infer that the YLCA 120, with a 16 340 l/h flow, has an available pressure of 289
kPa.
• Pressure drop in hydraulic circuit of a unit without pack:
– From the table we infer that the YLCA 120, with a 16 340 l/h flow, has an available pressure of 21
kPa.
• Pressure drop in filter.
– From Table
Pressure drop in filters, see on page 22 , 2 ½" filter, we infer that with a 16 340 l/h
flow, said filter has a pressure drop of 2.2 kPa.
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Technical Information
1.5 Selection guide (YLCA/YLHA)
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