Air-condensed water chillers and heat pumps YLCA / YLHA 100, 120 and 150 User manual Ref.
Index Index 1 User manual ............................................................................................................................1 1.1 1.1.1 1.1.2 1.1.3 1.1.4 General description of the unit.................................................................................................2 Models available and capacities...............................................................................................2 Technical specifications.............................................
1 User manual
1 1.1 User manual General description of the unit 1.1 General description of the unit The YLCA/YLHA units are high-performance air-water chillers and heat pumps using R-410A ecological refrigerant. 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.
User manual General description of the unit 1 1.1 1.1.2 Technical specifications These units are supplied completely factory-assembled and with all refrigerant tubing and wiring ready for installation on site. After mounting, these units must go through an operational test with water. Re‐ frigerant leaks will also be checked during this process. Sheet casing The units are made of galvanized steel sheeting and anticorrosion nuts and bolts. Panels can be removed for access to internal components.
1 1.1 User manual General description of the unit 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.
User manual General description of the unit 1 1.1 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.
1 1.1 User manual General description of the unit Antivibratory 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 accord‐ ance with the load to be supported.
User manual General description of the unit 1 1.1 1.1.3 Operating instructions µC3 (YLCA / YLHA 100, 120 and 150) This is a specially programmed controller for air-water chillers 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.
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User manual General description of the unit 1 1.
1 1.1 User manual General description of the unit Sensors and probes Pressure sensors (B3 and B4) One for each cooling circuit and connector to the coil collectors. They provide information to the system for fan speed adjustment in the summer and winter cycles, management of defrosts in the heat pumps, prevent and lockout functions of the system by excessively high pressure. NTC probes(B5 and B6) • B5- For the detection and control of water inlet temperature (cool only and heat pump units).
User manual General description of the unit 1 1.1 General diagram, (YLCA / YLHA 100,120 and 150) A Keyboard ‑ display terminal U Water outlet B Programme download key V Water inlet X Fan protection 12 D/J/C/I E/H Comp. 1/ Comp. 2 / Comp. 3 / Comp. 4 Pump 1/ Pump 2 K RS485 serial connection Y/A1/G1/ Protection comp. 1 / Protection comp. 2 / Protec‐ I1 tion comp. 3 / Protection comp. 4 Z/H1 HP1 / HP2 (High-pressure switch) L Phase (board power supply) C1 Fan 3.
1 1.1 User manual General description of the unit Start-up About 45 seconds after powering the unit, the start-up display is activated. Default language: English. 1st Display. START-UP (information on water temperature/unit status) • Water inlet temperature • Water outlet temperature • Unit status (ON/OFF) Press "down" to access the second display. 2nd Display. STATUS AND OPERATING MODE SELECTION Status selection ON/OFF (with ENTER, Up and Down).
User manual General description of the unit 1 1.1 -/- Configuration of sensors Range Units Value Sensor B3 calibration. Description Coil pressure circuit 1 -9,9/9,9 bar 0 Sensor B4 calibration. Coil pressure circuit 2 -9,9/9,9 bar 0 Sensor B5 calibration. Inlet water temp. to exchanger. -9,9/9,9 K 0 Sensor B6 calibration. Outlet water temp. to exchanger. -9,9/9,9 K 0 Sensor B7 calibration. Outdoor temperature -9,9/9,9 K 0 Sensor B8 calibration.
1 1.1 User manual General description of the unit -C- Compressor configuration Range Units Value Min. operating time of a compressor Description 0 / 9999 Seconds 120 Min.
User manual General description of the unit 1 1.1 -F- Condensation (fans) Description Type of fan control No. of condensers Range Units Value Temp. pressure ON/OFF - Pressure 2 1-2 - Fans - Inverter - Power supply frequency 50 / 60 Hz 50 PWM max. triac cut-off 0 / 100 % 92 PWM min.
1 1.1 User manual General description of the unit -H- Unit configuration Description Unit type Range 0‑7 Number of compressors/circuits Compressor rotation No. of evaporators Units Value - 2 (COOLER) 3 (HEAT PUMP) - 4/2 LIFO FIFO PERSONALISED TIME - FIFO 1 1‑2 - Driver number (EVD400) 0-1-2-4 - 0 Cycle inversion valve logic NO / NC - NC No. of pumps 1‑2 - 1 (SINGLE PUMP) 2 (TWO-PUMP ACCESSORY) Pump rotation START-UP TIME - TIME Pump operation ON WITH COMP.
User manual General description of the unit 1 1.1 -B- Inputs/Outputs Units Value Analogue input 3. Coil pressure circuit 1 (B3) Description Range bar INSTANT READ OUT Analogue input 4. Coil pressure circuit 2 (B4) bar INSTANT READ OUT Analogue input 5. Inlet water temperature (B5) °C INSTANT READ OUT Analogue input 6. Outlet water temperature (B6) °C 0 = OPEN C = CLOSED Digital input 1. External alarm O/C 0 = OPEN C = CLOSED Digital input 2.
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User manual General description of the unit 1 1.1 µC3 functions F-r. Software version / Language selection • Read out of the µC3 software version and update date. • The Up, Down and Enter keys select the language: English or Italian. Temperature control Two different modes (Control Menu): 1 Adjustment by water temperature at the heat exchanger inlet (sensor B5). This control carries out a proportional type adjustment based on a set point and a proportional band distributed over 4 stages.
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User manual General description of the unit • • 1 1.1 4-way valves (N13 and N14) Fans (Y3 and Y4) DefrOff Defrost end pressure DefrAct DefrOn Defrost start pressure t t 1...3 Partial times remain‐ ing in defrost start pressure zone Defrost active Time Antifreeze protection If the B6 temperature sensor (water outlet) detects a temperature below the antifreeze set temperature, the unit is blocked and in a state of alarm (manual reset).
1 1.1 User manual General description of the unit Second pump A second pump can be enabled by means of the -H-unit config menu. To do this, install the contactor (pump 230-1-50) between terminals N8-N, and the corresponding protector (contact NC) between ter‐ minals Dl18-G0. This second pump will operate alternately with the first pump, taking into account the number of operating hours or start-up cycles.
User manual General description of the unit 1 1.1 Alarm table Description Serious alarm FC, PG Input ID1 Off circ.1 Off circ.2 Off fan Off pump Off sys X Reset MANUAL Delay Notes - general Phase con‐ trol protection Antifreeze alarm B6 X X X X X MANUAL - The pump can be run‐ ning in OFF mode. See antifreeza menu. Pump 1 heat switch Q5 ID4 X X X X X MANUAL - If available, pump 1 starts up. If not, the entire system stops.
1 1.1 User manual General description of the unit Description Input Off circ.1 Off circ.
User manual General description of the unit 1 1.
1 1.1 User manual General description of the unit Maintenance responsibilities of the user Like any other machine, the HVAC unit requires regular maintenance, as the wear to which some of its parts are subjected can effect its mechanical reliability and the safety of those responsible for its main‐ tenance.
