Johnson Controls YORK YLCA 40 Manuale utente
Air-condensed water chillers and
heat pumps YLCA / YLHA 100, 120
and 150
User manual
Ref.: N-40291_EN 0112
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...........................................................................................................4
1.1.3 Operating instructions µC3 (YLCA / YLHA 100, 120 and 150).................................................7
1.1.4 Regular maintenance activities for which the user is responsible..........................................24
Index
i
1
User manual
1.1 General description of the unit
The YLCA/YLHA units are high-performance air-water chillers 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 vertical air discharge axial fans, that can be installed
directly outdoors.
They are available in two versions: with and without a hydro kit, which includes a buffer tank and a high
head pressure pump.
The control system of these units is a specially programmed electronic controller to be used on air-water
coolers and heat pumps equipped with tandem compressors. 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 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 RS-485 monitoring network.
For further information, please see Operating Instructions.
The YLCA/YLHA units are made of proven quality components and manufactured in compliance with
standards in force (ISO 9001 certification).
1.1.1 Models available and capacities
Cool-only
model YLCA 40 YLCA 50 YLCA 60 YLCA 80 YLCA 100 YLCA 120 YLCA 150
Cooling ca‐
pacity(1) 39,3 51,8 60,1 72,1 100,3 118,5 150,5
Cooling ca‐
pacity(2) 39,6 52,1 60,5 72,6 101 119 151
(1) Net cooling capacities in kW for 7 °C of water inlet/outlet temperature and 35 °C of ambient temperature according
to the EUROVENT EN14511:2011 certification
(2) Gross cooling capacities in kW for 7 °C of water inlet/outlet temperature and 35 °C of ambient temperature ac‐
cording to the EUROVENT EN14511:2011 certification
Heat pump
model YLHA 40 YLHA 50 YLHA 60 YLHA 80 YLHA 100 YLHA 120 YLHA 150
Cooling ca‐
pacity(1) 37,6 51,7 60,1 71,7 95,4 113,6 144,5
Heating ca‐
pacity(2) 39 52,8 60 75,2 104,6 120 150,5
Cooling ca‐
pacity(3) 37,8 52 60,5 72,2 96 114 145
Heating ca‐
pacity(4) 38,6 52,5 59,6 74,7 104 119,6 150
(1) Net cooling capacities in kW for 7 °C of water inlet/outlet temperature and 35 °C of ambient temperature according
to the EUROVENT EN14511:2011 certification
(2) Net heating capacities in kW for 45 °C of water inlet/outlet temperature and 7 °C of ambient temperature according
to the EUROVENT EN14511:2011 certification
(3) Gross cooling capacities in kW for 7 °C of water inlet/outlet temperature and 35 °C of ambient temperature ac‐
cording to the EUROVENT EN14511:2011 certification
(4) Gross heating capacities in kW for 45 °C of water inlet/outlet temperature and 7 °C of ambient temperature ac‐
cording to the EUROVENT EN14511:2011 certification
1 User manual
1.1 General description of the unit
2
User manual 1
General description of the unit 1.1
3
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 cover
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
polymerized enamel.
Compressors
One, two or four hermetic Scroll compressors are used, mounted in tandem on rails and antivibratory
supports. The compressors are connected for operation with one single cooling circuit. Start-up is carried
out by two independent starters. These compressors are equipped with mechanical elements that protect
them against high operating temperatures. The sump heaters operate only when the compressor is
inoperative.
Water-side exchanger
Comprises a stainless steel plate exchanger, adequately insulated by a layer of closed-cell elastomer
foam. Includes an antifreeze heater monitored by the controller. The coolant side of said exchanger
accepts an operating pressure of 45 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).
Air-side 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 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 locking isolator that
turns power supply off. Inside we find the contactors for compressors and the pump, the transformer,
magneto-thermal protectors, controller electronic plates, 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.
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.
1User manual
1.1 General description of the unit
4
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 heater, 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.
Two pumps
Accessory available with models 50 to 150 with hydro kit. The second pump becomes operative when
the thermal magnetic switch protector of the first pump is activated (models 50, 60 and 80), or through
the controller program (models 100, 120 and 150).
Water filter
Supplied as a standard element on units including the hydro kit. Stainless steel mesh with 1 mm. diameter
perforations. Optional on units not including the hydro kit. The warranty of the unit will not be valid if a
water filter has not been installed.
Remote control
Wall-mounted remote control unit with keyboard for cool/heat and ON/OFF functions. Includes LEDs for
power supply, alarm and cool/heat. 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
With a serial board it is possible to connect the system to a standard RS-485 monitoring network.
Low sound level units (LN)
Include anti-noise covers mounted on the compressors and sound isolating plates, covering the
compressor chamber.
Gentle starter
For the soft motor start. Specially designed for Scroll compressors. (Maximum outdoor temperature: 50
°C).
Protecting grids
To protect the coils from possible impacts. Made of steel rods and painted with oven baked polymerized
white enamel (RAL9001).
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 a maximum, a set of steel
spring antivibratory 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
accordance with the load to be supported.
The antivibratory support accessory for models
YLCA/YLHA 40, 50 and 60 includes 4 units, whereas
for models YLCA/YLHA 80, 100, 120 and 150
includes 6.
These spring supports should be distributed and
fastened in the drilled holes at the base of the cooler,
the location of which is detailed in the General
Dimensions section.
YLCA/YLHA 40
50
YLCA/YLHA 50 ÷ 150
Ø 10
Ø 75
125
14,5
80
86
115
14,5
1User manual
1.1 General description of the unit
6
1.1.3 Operating instructions µC3 (YLCA / YLHA 100, 120 and 150)
This is a specially programmed controller for air-water coolers and heat pumps with four capacity stages.
These are divided into two independent cooling circuits equipped with two tandems that act upon a
common water circuit. Both systems are equipped with two fans each, the speed of which is controlled
by pressure sensors. The controller operates through the following intakes and outlets.
Digital inputs
ID1 ‑ J1/8 General protection (PG)
ID2 ‑ J1/1 Flow switch (FS)
ID3 ‑ J1/9 Remote ON/OFF (ROO)
ID4 ‑ J1/2 Pump protector No. 1 (Q5)
ID5 ‑ J1/10 Low-pressure switch circuit 1 (LP1)
ID6 ‑ J4/8 High-pressure switch circuit 1 (HP1)
ID7 ‑ J4/1 Thermal protector compressor 1 (THPC1)
ID8 ‑ J4/9 Thermal protector compressor 2 (THPC2)
ID9 ‑ J4/2 Thermal protector circuit 1 fans (THPF 1-2)
ID10 ‑ J4/10 Low-pressure switch circuit 2 (LP2)
ID11 ‑ J7/6 High-pressure switch circuit 2 (HP2)
ID12 ‑ J7/1 Thermal protector compressor 3 (THPC3)
ID13 ‑ J7/8 Thermal protector compressor 4 (THPC4)
ID14 ‑ J7/3 Thermal protector circuit 2 fans (THPF 3-4)
ID15 ‑ J7/9 Remote COOL/HEAT (RCH)
ID18 ‑ J7/5 Pump protector No. 2 (Q6)
Digital outputs
N01/C1-2 Compressor 1 circuit 1 (K1)
N02/C1-2 Compressor 2 circuit 1 (K2)
N05/C5 Pump 1
N06/C6-7 Compressor 3 circuit 2 (K3)
N07/C6-7 Compressor 4 circuit 2 (K4)
N08/C8-9 Pump 2
N010/C10 Alarm
N011/C11-12 Antifreeze heater circuit 1-2
N012/C11-12 Back-up heater
N013/C13-14 4-way valve circuit 1 (V4V1)
N014/C13-14 4-way valve circuit 2 (V4V2)
User manual 1
General description of the unit 1.1
7
Analogue inputs
B3 ‑ J2 Coil pressure circuit 1
B4 ‑ J3 Coil pressure circuit 2
B5 ‑ J4/13 Water temperature at exchanger inlet
B6 ‑ J4/12 Water temperature at exchanger outlet
Analogue outputs
Y3 Circuit 1 fan speed control (PWM)
Y4 Circuit 2 fan speed control (PWM)
System components
The system is made up of the following basic components:
• Touch screen
• µC3 controller
• Fan speed controllers (FSC1 and FSC2)
• Pressure sensors (B3 and B4)
• NTC probes (B5 and B6)
Touch screen
This consists of a screen and six keys with the
following functions:
• Alarm ‑2-
• Programming ‑1-
• Esc (Escape)
• Up ‑3-
• Enter ‑4-
• Down ‑5-
The following functions can be selected from this
screen:
• ON/OFF
• COLD/HEAT
• Read the unit status
• Access the configuration menus (by means of a password)
• Read the alarm messages and reset these alarms
• Read operating pressures and temperatures
• etc...
µC3 controller
This contains the unit software and the entire digital
and analogue input and output connector system.
This module is also equipped with connectors for the
program download key and the serial communication
connection to an RS-485 monitoring system.
122 44
33
5
1User manual
1.1 General description of the unit
8
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