1.1.2 Technical specifications
These units are supplied completely factory-assembled and with all coolant tubing and wiring ready for
installation on site. After mounting, these units must go through an operational test with water. Coolant
leaks will also be checked during this process.
Sheeting casing
The units are made of galvanized steel sheeting and anticorrosion nuts and bolts. Panels can be removed
for access to internal components. The casing parts are painted with white RAL9001 oven-baked poly‐
merized enamel.
Compressors
Hermetic Scroll compressors are used, mounted on anti-vibration supports. These compressors are
equipped with internal devices that protect them against high operating temperatures. The sump heaters
operate only when the compressor is inoperative.
Indoor heat exchanger
Comprises a stainless steel plate exchanger, adequately insulated by a layer of closed-cell elastomer
foam. The coolant side of said exchanger accepts an operating pressure of 52 bar, whereas the water
side accepts 10 bar. When the unit includes a hydro kit, maximum admissible pressure on the water side
is 6 bar (adjustment of the tank safety valve).
Outdoor heat exchanger
Made up of two notched aluminium blue fin coils and grooved copper tubing mechanically expanded
within the fin assembly.
Fans
Of the axial and low sound level type. Equipped with single-phase motors with IP54 protection. These
motors allow speed control by means of a phase cut-out shifter controlled by the unit controller. This
allows unit operation at low ambient temperatures (-10°C). On cool only units with an optional low ambient
temperature kit can reach ‑18°C. On heat pumps, the fan will remain inoperative during defrosting.
Electrical and control panel
Located inside the machine, and with IP44 protection. The operating and control components are factory
mounted, wired and tested. This control panel is equipped with an external locking isolator that turns the
power supply off. Inside are the contactors for the compressor and the pump, the transformer, thermal
magnetic protectors, the speed control, connecting strip and the keyboard-display with the unit controls.
Control keyboard-display
This device is accessible through an external leak-tight plastic cover. This is an easy-to-use control with
three access levels: direct, user (password) and factory (password). For further information, please see
Operating instructions µC2
, see on page 7.
Cooling circuit
The cool only unit cooling circuit includes: Schrader valves on the high, low and liquid sides, expansion
valve, filter dryer, sight glass (YLCA 20 to 27), high and low pressure switches, service valves to isolate
the condenser (YLCA 27) and an expansion restrictor (YLCA 5 to 15).
The heat pump model includes: Schrader valves on the high, low and liquid sides, two expansion re‐
strictors (YLHA PLUS 5 to 15), two expansion valves, high and low pressure switches, dryer filter, sight
glass (YLHA PLUS 20 to 27), four-way valve (energised during the summer cycle and during defrost
cycles), check valves (YLHA PLUS 20 to 27), service valves for isolating the condenser (YLHA PLUS
27), an expansion valve for the heat cycle and a liquid vessel. The suction tubing is coated with closed-
cell elastomer.
User manual
1
General description of the unit
1.1
3
Summary of Contents for YLCA
Page 3: ...1 User manual...
