Technical information
11
Operation, cooling and hydraulic diagram, YLCA 40 (cool only)
SAFETY/CONTROL DEVICES
A High pressure switch
B Low pressure switch
C Condensing pressure transducer
E Water outlet temperature sensor
(antifreeze and display)
F 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 Flow switch
8 Globe valve
9 Water pump
10 Automatic air bleed
11 Expansion vessel
12 Drain connection
13 Water filter (not inside the unit)
14 Relief valve
Heat exchange takes place between the heat transfer liquid
(water or glycol water) and the refrigerant in the plate heat
exchanger.
Water is cooled, and refrigerant is evaporated and reheated.
Then the Scroll compressor condenses the refrigerant (gas)
until the condensing pressure is reached, and the refriger-
ant goes to the air cooled condensing unit. In the air cooled
condensing unit, heat is exchanged between the air and the
refrigerant. The air is heated and evacuated from the chiller
(heat rejection). The refrigerant is condensed and sub-cooled.
Then the refrigerant (liquid) goes on to the expansion ele-
ment, where it is expanded until the evaporating pressure is
reached, at which time it goes to the plate heat exchanger
to start a new cooling cycle.
Pipe connection with Schrader valve
For units with hydro kit only