Technical information

16
Operation, cooling and hydraulic diagram, YLHA 100, 120 and 150 (heat pump)
SAFETY/CONTROL DEVICES
A High pressure switch
B Low pressure switch
C Pressure transducer port.
Fan speed setting, defrost management,
condensing pressure display (cooling
cycle)
or evaporating pressure display (heating
cycle)
D Water outlet temperature sensor
(Antifreeze and display)
E Water intake temperature sensor
(Setting and display)
COMPONENTS
1 Tandem compressor
2 Air cooled condenser
3 Filter dryer
4 Sight glass
5 Expansion valve
6 Plate heat exchanger
7 Heat exchanger antifreeze heater
8 Globe valve
9 4-way valve
10 Liquid receiver
11 Water pump
12 Automatic air bleed
13 Water tank antifreeze heater
14 Expansion vessel
15 Water tank
16 Charge valve
17 Drain valve
18 Water filter (not inside the unit)
19 Relief valve
20 Water pressure gauge
21 Flow switch
22 Retainer valve





























































Pipe connection with Schrader valve
For units with hydro kit only