York YLCA User Manual
Air-condensed water cooling units and heat pumps
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Summary of Contents for York YLCA
- Page 1 Air-condensed water cooling units and heat pumps YLCA / YLHA PLUS 5 to 27 User manual Ref.: N-40315_EN 1110...
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Page 2: Table Of Contents
Index Index User manual..........................1 General description of the unit....................2 1.1.1 Models available and capacities....................2 1.1.2 Technical specifications......................3 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... -
Page 3: User Manual
User manual... -
Page 4: General Description Of The Unit
µC2, see on page 7 . For further information, please see 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... -
Page 5: Technical Specifications
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). - Page 6 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: 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.
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Page 7: Options And Accessories
(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. - Page 8 General description of the unit Antivibration supports Whenever necessary to reduce vibrations and noise YLCA/YLHA PLUS 5 ÷ 15 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.
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Page 9: Operating Instructions Μc2
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: •... - Page 10 User manual Operating instructions µC2 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.
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Page 11: General Diagram
User manual Operating instructions µC2 1.2.1 General diagram General diagram YLCA 5 ÷ 15 Water outlet temperature probe (Antifreeze pro‐ Four-way valve tection) Outdoor temperature probe in units with LAK Pump Battery probe in standard units (fan and defrost control) - Page 12 User manual Operating instructions µC2 General diagram YLCA 20 ÷ 27 and YLHA 5 ÷ 27 Water outlet temperature probe (Antifreeze pro‐ Four-way valve tection) Pump Outdoor temperature probe (Dynamic set point) Ratiometric pressure probe (fan speed and defrost Heater...
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Page 13: Symbols On The Display
User manual Operating instructions µC2 1.2.2 Symbols on the display The display has three figures in green, plus the sign and one decimal. It also shows the symbols of the functions selected in orange (the alarm symbol is red). Meaning Button Colour LED permanently lit... -
Page 14: Control Layout
Four-way valve probe (B2) Indoor heat exchang‐ Outdoor heat exchanger NTC water inlet probe Pressure sensor (BA) (B1) (YLCA / YLHA PLUS 5 to 20 LAK) (YLCA / YLHA PLUS 20 to 27) Pump Outdoor exchanger NTC probe (B3) (YLCA / YLHA PLUS 5 to... -
Page 15: Parameters Relating To Probes
73 (R) °C/bar YLCA/YLHA PLUS 5 to 15 /03=1; YLCA/YLHA PLUS 5 to 15 LAK /03=2; YLCA/YLHA PLUS 20 to 27 /03=2 YLCA/YLHA PLUS 5 to 15 /04=2; YLCA/YLHA PLUS 5 to 15 LAK /04=3; YLCA/YLHA PLUS 20 to 27 /04=3 1.2.5 Parameters relating to the compressor... -
Page 16: Operating Graphics
User manual Operating instructions µC2 1.2.6 Operating graphics Min. operating time of a compressor Signal Compressor Min. stoppage time of a compressor Signal Compressor Min. time between compressor start-ups Signal Compressor... - Page 17 User manual Operating instructions µC2 Compressor / pump stoppage delays Compressor Pump Pump / compressor start-up delays Pump Compressor...
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Page 18: Parameters Relating To Fans
Fan operating when starting with high am‐ 91 (R/W) Seconds bient temperature Parameters to be checked when pressure probes are to be used (low ambient accessory) YLCA 5 to 15. Fan speed Condensing temperature Evaporation temperature... -
Page 19: Parameters Relating To Defrost
User manual Operating instructions µC2 1.2.8 Parameters relating to defrost Parameters relating to defrost Parameters Description Level Unit Max. Min. Value Defrost operation: 0= Absent (function not available 7 (R/W) 1= Present Defrost at time or temperature: 0= Time (function not available) 8 (R/W) 1= Temperature / Pressure Defrost start temp... -
Page 20: Antifreeze Control Configuration Parameters
User manual Operating instructions µC2 1.2.9 Antifreeze control configuration parameters Antifreeze control configuration parameters Parameters Description Level Unit Max. Min. Value Antifreeze control set point temperature 11 (R/W) °C Antifreeze reset differential 12 (R/W) °K Antifreeze alarm by-pass time 22 (R/W) Seconds Antifreeze heater activation temperature 13 (R/W) -
Page 21: Unit Configuration Parameters
Display Description Level Unit Max. Min. Value Unit model: (YLCA) 2= Water cooling unit 54 (R/W) 3= Air-water heat pump (YLHA PLUS) Number of ventilation circuits (do not modify this pa‐ 12 (R/W) rameter) No. of evaporating units present (do not modify this... -
Page 22: Alarm Configuration Parameters
User manual Operating instructions µC2 1.2.11 Alarm configuration parameters Alarm configuration parameters Parameters Description Level Unit Max. Min. Value Alarm delay by flow switch at start-up. 63 (R/W) Seconds Alarm delay by flow switch with unit in operation. 64 (R/W) Seconds Alarm delay by low pressure switch at start-up. -
Page 23: Controller Configuration Parameters
User manual Operating instructions µC2 1.2.12 Controller configuration parameters Controller configuration parameters Display Description Level Unit Max. Min. Value Cool cycle set point temperature 41 (R/W) °C Cool set point temperature differential 42 (R/W) °C Heat cycle set point temperature 43 (R/W) °C Heat cycle set point temperature differential... -
Page 24: Alarm Table
User manual Operating instructions µC2 1.2.13 Alarm table Alarm table Display Alarm type Reset Antifreeze alarm Manual High temperature at start-up (if activated, Automatic P20=1) Low temperature at start-up (if activated, Automatic P20=1) d1-2 Defrost operating dF1-2 Problem in defrost Automatic B1 probe Automatic... -
Page 25: Functions
User manual Operating instructions µC2 1.2.14 Functions Alarm reset Pressing the UP ‑4- and DOWN ‑5- keys for 5 seconds cancels the alarms present in the memory. At the same time, the alarm message disappears from the display and the alarm relay is deactivated. Forced defrost (heat pumps) Pressing the SEL ‑6- and UP ‑4- keys simultaneously for 5 seconds activates forced defrost of the unit. -
Page 26: Temperature / Resistance Characteristics Of Ntc Control Probes (10 Kohms)
User manual Regular maintenance activities for which the user is responsible 1.2.15 Temperature / resistance characteristics of NTC control probes (10 kOhms) Temperature Resistance Temperature Resistance Temperature Resistance Temperature Resistance Temperature Resistance [°C] [kOhms] [°C] [kOhms] [°C] [kOhms] [°C] [kOhms] [°C] [kOhms] 329,2... -
Page 27: Maintenance Responsibilities Of The User
User manual Regular maintenance activities for which the user is responsible 1.3.2 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.