York YLCA User manual
Air-condensed water cooling units
and heat pumps YLCA / YLHA PLUS
5 to 27
User manual
Ref.: N-40315_EN 1110
Index
1User manual.............................................................................................................................1
1.1 General description of the unit.................................................................................................2
1.1.1 Models available and capacities...............................................................................................2
1.1.2 Technical specifications...........................................................................................................3
1.2 Operating instructions µC2 ......................................................................................................7
1.2.1 General diagram.......................................................................................................................9
1.2.2 Symbols on the display..........................................................................................................11
1.2.3 Control layout.........................................................................................................................12
1.2.4 Parameters relating to probes................................................................................................13
1.2.5 Parameters relating to the compressor..................................................................................13
1.2.6 Operating graphics.................................................................................................................14
1.2.7 Parameters relating to fans....................................................................................................16
1.2.8 Parameters relating to defrost................................................................................................17
1.2.9 Antifreeze control configuration parameters...........................................................................18
1.2.10 Unit configuration parameters................................................................................................19
1.2.11 Alarm configuration parameters.............................................................................................20
1.2.12 Controller configuration parameters.......................................................................................21
1.2.13 Alarm table.............................................................................................................................22
1.2.14 Functions................................................................................................................................23
1.2.15 Temperature / resistance characteristics of NTC control probes (10 kOhms).......................24
1.3 Regular maintenance activities for which the user is responsible..........................................24
1.3.1 Maintenance Schedule...........................................................................................................24
1.3.2 Maintenance responsibilities of the user................................................................................25
Index
i
1
User manual
1.1 General description of the unit
The YLCA/YLHA PLUS 5 to 27 units are high-performance air-water cooling units and heat pumps using
R-410A ecological coolant.
These units are designed for air conditioning or industrial applications that require cold or hot water.
They are silent and compact units, equipped with axial fans, that can be installed directly outdoors.
Inertia tanks are available as an optional extra for those installations requiring a greater volume of water.
The control system of these units is a specially programmed electronic controller for use with air-water
cooling units and heat pumps.
Easy to use and safe, these units precision-control the water return temperature of the installation, carry
out defrost cycles, modulate fan speeds and control compressor, pump and auxiliary electric heater start-
up. By reading the control probes and safety elements, the controller protects the entire equipment
against malfunctions. The system allows connecting the unit to a standard RS485 monitoring network.
For further information, please see
Operating instructions µC2, see on page 7
.
The YLCA/YLHA PLUS 5 to 27 units are made of proven quality components and manufactured in com‐
pliance with standards in force (ISO 9001 certification).
1.1.1 Models available and capacities
Cool-only model YLCA 5 M YLCA 7 M and T YLCA 9 M and T YLCA 12 M and T
Cooling capacity 5,38 7,13 9,05 12,40
Cool-only model YLCA 15 T YLCA 20 T YLCA 27 T
Cooling capacity 14,5 19,52 25,60
Heat pump model YLHA PLUS 5 M YLHA PLUS 7 M and T YLHA PLUS 9 M and T
Cooling capacity 5,4 7,10 8,72
Heating capacity 6,3 7,16 10,1
Heat pump model YLHA PLUS 12 M
and T YLHA PLUS 15 T YLHA PLUS 20 T YLHA PLUS 27 T
Cooling capacity 11,75 13,8 19,4 25,8
12
Heating capacity 12,25 16,1 20,9 27,5
12,4
Cooling capacities in kW for 12/7 °C water inlet/outlet temperature and 35 °C ambient temperature.
Heating capacities in kW for 40/45 °C water inlet/outlet temperature and 7 °C ambient temperature.
1User manual
1.1 General description of the unit
2
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
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: centri‐
fugal pump, expansion tank loaded with nitrogen at 1,5 bar, safety valve set to 6 bar, flow switch, air
bleed 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.
Protecting grids
To protect the coils from possible impacts. Made of steel rods and painted with oven baked polymerized
white enamel (RAL9001).
Soft Start
The models YLHA PLUS 5, 7, 9 and 12 MCS have an electronic starter specially designed to limit the
starter intensity point in the single-phase Scroll compressors.
1User manual
1.1 General description of the unit
4
Options and accessories
Remote control
Wall-mounted remote control unit with keyboard for cool/heat and ON/OFF functions. Includes power
supply, alarm and cool/heat LEDs. Maximum cable length: 50 m.
Remote terminal
For total access and control of the system by means of the display and buttons. It allows for selection of
cool, heat and off functions. Operating parameters can also be modified and the system can also be
supervised. Can be installed at a maximum distance of 1040 m.
BMS connections
By means of a serial board, it is possible to connect the system to a standard RS485 monitoring network.
low ambient temperature kit (YLCA 5 to 15)
Includes a pressure transducer to control condensation pressure at low ambient temperatures (-18 °C).
This component is standard in models YLCA 20 to 27 and YLHA PLUS 5 to 27.
High pressure fans
Inertia tank
With or without built-in auxiliary heater.
User manual 1
General description of the unit 1.1
5
Antivibration supports
Whenever necessary to reduce vibrations and noise
produced by the unit to the maximum, a set of rubber
antivibration supports can be used. These should be
installed between the chassis support of the unit and
the base or floor on which it is to sit.
This base must be solid and dimensioned in accord‐
ance with the load to be supported.
Use 8/10MA bolts to fasten the supports to the base
of the chassis.
The antivibration support accessory includes 4 parts.
These spring supports should be distributed and fas‐
tened in the drilled holes at the base of the cooling
unit, the location of which is detailed in the section
Dimensions, clearance and accesses of the docu‐
ments
Installation
and
Technical Information
for the
unit.
YLCA/YLHA PLUS 5 ÷ 15
11
15
65
90
24
30
8MA
YLCA/YLHA PLUS 20 ÷ 27
50
1User manual
1.1 General description of the unit
6
1.2 Operating instructions µC2
DESCRIPTION OF THE CONTROL UNIT
This is a multipurpose controller specially programmed for use with air-water cooling units and heat
pumps equipped with a compressor with one single power stage.
Main functions
• Water temperature control (at inlet or outlet, As per parameter r6).
• Defrost cycle management.
• System operating and safety management.
• Fan speed control.
• Alarm management.
• Connection for supervision and remote assistance (serial connection accessory RS485).
Devices controlled
• Compressor
• Fans
• Four-way valve
• Water pump
• Alarm device
• Auxiliary heater
STANDARD COMPONENTS
Control module
This is the central nucleus that processes the signals coming from the probes and protection elements
of the entire system to control its active elements: compressor and fans, four-way valve, water circulating
pump, alarm relay and auxiliary heater. Power supply 24 Vac.
It can also be used for access and control of the system by means of the display, buttons and LEDs
available. It allows for selection of cool, heat and off functions. Operating parameters can also be modi‐
fied, and the system can also be supervised.
Fan speed control module
Operates by phase cut-off. Includes fuse
NTC and ratiometric (pressure) probes
YLCA / YLHA PLUS 5 to 15 standard
4 NTC probes are used to read the temperatures of the system:
• B1. Controls the set point. Reads water temperature at exchanger inlet.
• B2. Antifreeze control. Reads water temperature at exchanger outlet.
• B3. Controls the dynamic set point. Reads outdoor air temperature.
• B4. Fan speed and defrost cycle control. Reads coolant pressure inside the battery.
YLHA PLUS, YLCA 20, 27 and YLCA 5 to 15 LAK (Low ambient Kit accessory)
3 NTC probes are used to read system temperatures and a ratiometric pressure transducer (B4) to read
coolant pressure inside the coil:
• B1. Controls the set point. Reads water temperature at exchanger inlet.
• B2. Antifreeze control. Reads water temperature at exchanger outlet.
• B3. Controls the dynamic set point. Reads outdoor air temperature.
• B4. Fan speed and defrost cycle control. Reads coolant pressure inside the coil.
Parameters
The set of parameters that configure the operating program of the unit is divided into four levels (Factory,
Super User, User and Direct), depending on the function of each parameter and the user’s access level.
The parameters of each level can be modified from that same level, as well as lower level parameters.
User manual 1
Operating instructions µC2 1.2
7
Factory Level
Accessible with the Factory password. Allows configuration of all unit parameters.
Super User Level
Accessible with the Super User password. Allows setting of Super User, User and Direct parameters.
User Level
Accessible with password 22. Allows access to all parameters the user normally sets.
Direct Level
Accessible without a password. Allows for reading of the values detected by the probes, as well as other
system values. Can be used by the user without affecting unit operation.
General
Modification of the parameters that affect basic unit configuration should be made with the controller in
Standby position.
1User manual
1.2 Operating instructions µC2
8
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