Technical information

12
Operation, cooling and hydraulic diagram, YLHA 40 (heat pump)
SAFETY/CONTROL DEVICES
A High pressure switch
B Low pressure switch
E Pressure transducer port.
Fan speed setting, defrost management,
condensing pressure display (cooling
cycle)
or evaporating pressure display (heating
cycle)
F Water outlet temperature sensor
(Antifreeze, setting and display)
G Water intake temperature sensor
(Setting and display)
COMPONENTS
1 Compressor
2 Air cooled condenser
3 Filter dryer
4 Sight glass
5 Expansion valve
6 Plate heat exchanger
7 Globe valve
8 4-way valve
9 Retainer valve
10 Liquid receiver
11 Automatic air bleed
12 Expansion vessel
13 Relief valve
14 Water pump
15 Flow switch
16 Drain connection
17 Water filter (not inside the unit)
































Pipe connection with Schrader valve
For units with hydro kit only