Operation, Cooling And Hydraulic Diagram Cool Only Unit Ylca - York YLCA Series Technical Information

Operation, cooling and hydraulic diagram, cool only unit YLCA
2
8
P
C
8
4
SAFETY/CONTROL DEVICES
A High pressure switch
B Low pressure switch
C Pressure transducer port (LAK YLCA
5 to 15)
Pressure sensor. Pressure reading.
Fan speed setting (YLCA 20, 27)
D Coil temperature sensor. Temperature
reading and fan speed setting (YLCA
5 to 15)
E
Water outlet temperature sensor
(antifreeze and display)
F Water intake temperature sensor
(Setting and display)
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 refrigerant goes to the air cooled condensing unit. In
the air cooled condensing unit, heat is exchanged between
12
A
B
P P
1
D
3
5
YLCA-20. 27 (TEV)
YLCA-5 to 15 (RESTRICTOR)
5
COMPONENTS
1
Compressor
2
Air cooled condenser
3 Filter dryer
4 Sight glass (YLCA 20, 27)
5 Expansion valve
6 Plate heat exchanger
7
Flow switch
8
Globe valve (YLCA 27)
9
Water pump
10
11
F
6
E
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 valve, where
it is expanded until the evaporating pressure is reached,
at which time it goes to the evaporating unit to start a new
cooling cycle.
9
13
WATER
INTAKE
14
7
WATER
OUTLET
12
10 Automatic air bleed
11 Expansion vessel
12 Drain connection
13 Water filter (not inside the unit)
14 Relief valve
Pipe connection with Schrader valve
For units with hydro kit only