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UNICA
Sanitary water heat pump
If air inlet and/or outlet pipes are connected, portion airflow and capacity in heat pump unit will lose.
If the unit connects with air ducts it should be DN 180 mm for pipes or 180 mm internal diameter flexible hose. Total
length of the ducts should not be longer than 8 m or the maximum static pressure should not exceed than 60 Pa. If
the air ducts are bended, the pressure loss will be larger. So if there are 2 bending pipes, the total length of the
ducts should not be longer than 4m.
Please note that the performance of the unit are reduced in the case the air inlet is connected to a duct which takes
air from outside, because of the low winter temperatures and high summer temperatures.
The optimal working ambient temperature is 20°C.
In the table on this side, the max lenghts of air
piping are reported, depending on the geometry
and if the installer need to reduce the diameter to
160 mm.
9.5 INSTALLATION OVERVIEW
An hydraulic safety group complying with EN 1487 standards must be installed in the water inlet. If not, it could
cause damage to the unit, or even hurt people. The safety group must be provided with stop valve, manual drain
valve, inspectionable non-return valve and safety valve set to 7 bar. For the installation place please refer to the
pipeline connection sketch. The safety group must be protected from frost.
The discharge pipe connected to the safety group is to be installed in a continuously downward direction and in a
frost-free environment. Ensure the water may drip from the discharge pipe of the safety group and that this pipe
must be left open to the atmosphere.
The safety group is to be operated regularly to remove lime deposits and to verify that it is not blocked. Please
beware of burn, because of the high temperature of water.
The expansion tank with capacity suitably sized to absorb volume variations (depending from the extension of
sanitary distribution piping) must be installed in the inlet line. In each case, its capacity must not be lower than 12 L
for 200 series and 18 L for 300 series.
The tank water can be drained through the external manual gate valve installed on the inlet pipe (not provided).
After all the pipes installed turn on the cold water inlet and hot water outlet to fill the tank. When there is water
normally flowing out from water outlet taps, the tank is full. Turn off all valves and check all pipes. If any leakage,
please repair.
If the inlet water pressure is less than 1.5 bar, a pressure pump should be installed at the water inlet. For ensure the
long safety using age of tank at the condition of water supply hydraulic higher than 5.5 bar, a reducing valve should
be mounted at the water inlet pipe.
A filter is advisable in the air inlet. If the unit is connected with ducts, filter in there must be put forward to the air
inlet of duct.
To fluently drain condensate water from evaporator, please install the unit at the horizontal floor with a maximum
inclination angle of 2 degrees towards the discharge hole that is located on the opposite side of the control panel.
Otherwise, please make sure the condensate drain pipe is at the lowest place and make a siphon on it if necessary.
16
Max lenght of air piping (in+out)
Without curves
1
90° curves
2
no.
3
4
d = 180 mm
d = 160 mm
8 m
4,3 m
6,9 m
3,2 m
5,9 m
2,2 m
4,9 m
4 m
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