EDM SYSHP MINI SPLIT TANK

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4.2 Heat Pump Leaving Water Temperature (LWT) Selecon
The recommended design LTW ranges for dierent types of heat emier are:
▪ For oor heang: 30 to 35⁰ C
▪ For fan coil units: 40 to 45⁰ C
▪ For low temperature radiators: 40 to 50⁰ C
4.3 Opmizing System Design
To get the most comfort with the lowest energy consumpon with the Heat Pump , it is important to take account of the following
consideraons:
▪ Choose heat emiers that allow the heat pump system to operate at as low a hot water temperature as possible whilst sll
providing sucient heang.
▪ Make sure the correct weather dependency curve is selected to match the installaon environment (building structure,
climate) as well as ender user’s demands.
▪ Connecng room thermostats (eld supplied) to the hydro system helps prevent excessive space heang by stopping the
outdoor unit and circulator pump when the room temperature is above the thermostat set point.
4.4 Tank back up heater noce
Heat pump will stop when T5(tank temperature) has reached the minimum of both T5S(tank seng temperature) and T5stop
(highest tank temperature which can be reached under certain ambient temperature with heat pump only) and lasted for 5s.
The value of T5stop is shown as below.
If T5S is higher than T5stop, then T5S can not be reached with heat pump only. In this case, tank back up heater is needed in
order to reach T5S.
T5stop value:
Ambient temperature(°C) < -20 -20~15 -15~-10 -10~-5 -5~0 0~5 5~10
T5stop(°C) 35 40 45 48 52 55 56
Ambient temperature(°C) 10~15 15~20 20~25 25~30 35~40 40~65 40~65
T5stop(°C) 57 56 55 52 50 48 45