York YLCD Series User Manual page 7

The standard air outlet is horizontal, although there is an option of modifying it to a vertical air outlet.
• The 100, 120 and 150 units are fitted with radial centrifugal fans with a directly coupled, electronically
controlled (EC) three-phase motor. Adjustment is automatic, high performance and is performed
through the cooling circuit pressure. The aim is to find the revs, the most appropriate and efficient
consumption of the fan. In this case, the air supply can be transformed from horizontal to vertical
(front or rear) by changing a plenum cover.
• The 25, 40 and 70 units are fitted with centrifugal fans with a motor with belt and pulley transmission.
– The 25 units are fitted with two fans with a shaft shared and a motor.
– The 40 and 70 units are fitted with two independent fans with a motor each.
– A high pressure switch has been added to the cooling circuit, which actuates on the operation of
one of the motors to carry out the LAK condensation control function.
Electrical and control panel
Located at the front of the unit, and with IP44 protection. The operating and control components are
factory mounted, wired and tested. The door of this control panel is equipped with a switch-disconnector
that cuts off the power supply. Inside we find the contactors for compressors and the pump, the
transformer, thermal magnetic protectors, controller electronic plates, 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.
Cooling circuit
The cool only unit cooling circuit includes: expansion valve, filter-dryer, liquid sight glass, high and low-
pressure switches, service valves for isolating the condensing unit, and Schrader valves on the high and
low sides. The heat pump model also includes, in addition, a four-way valve (energized in summer cycle
and during defrosts), retaining valves, a heat cycle expansion valve and a liquid tank. The suction tubing
is coated with closed-cell elastomer.
Hydro kit (pack)
These units include a pack assembled with the components of a hydro kit. This assembly is located within
the unit frame and does not increase the footprint of same. It includes the following components: Lined
buffer tank and with an antifreeze resistor (except size 25), centrifugal pump, expansion vessel charged
with nitrogen at 1.5 bar, safety valve set to 6 bar, water circuit, pressure gauge, two air bleed valves,
filling valve and drain valve. Also includes a mesh filter for the water circuit. This filter is supplied loose
for installation at the most convenient point.
Flow switch
Assures sufficient water flow when the unit is in operation.
Options and accessories
Units without hydro kit
This includes the elements described in the previously mentioned specifications, less the hydro kit (pack).
The water circuit includes an air bleed valve. Connections are ready for on-site installation (except size
25).
Two pumps
Accessory available with models 100 to 150 with hydro kit. The second pump is started using the
controller program (Models 100, 120 and 150).
User manual
General information 1.1
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