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MCQUAY DIGITAL SCROLL SYSTEM

MCQUAY DIGITAL SCROLL SYSTEM

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MCQUAY DIGITAL SCROLL SYSTEM

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  1. MCQUAY DIGITAL SCROLL SYSTEM Installation

  2. INSTALLATION • Bad Installation – System will not operate as per design • Waste of Money • Waste of Time • Bad Image • 3 Major Categories • Unit Installation • Piping Installation • Wiring Installation

  3. INSTALLATION • Unit Installation • Indoor Unit • Outdoor Unit Note: Installation of indoor unit is same as normal direct expansion unit.

  4. INSTALLATION • Outdoor Unit Installation • Sufficient area around the unit. No barrier for supply air and discharge air. • Avoid discharge air return to the unit (Hot Air short-circuiting) • Strong foundation for the unit

  5. INSTALLATION Handling Outdoor Unit Correct

  6. INSTALLATION Handling Outdoor Unit Wrong

  7. INSTALLATION Correct Wrong

  8. INSTALLATION

  9. INSTALLATION Outdoor Unit Spacing (Single Outdoor Unit) Wall / Barrier higher than unit Wall / Barrier lower than unit Side View

  10. INSTALLATION Outdoor Unit Spacing (Single Outdoor Unit) Top View (Barrier higher than unit)

  11. INSTALLATION Outdoor Unit Spacing (Single Outdoor Unit) Top View (Barrier lower than unit)

  12. INSTALLATION Outdoor Unit Spacing (More than 1 unit) Top View (Wall / Barrier restriction same as 1 outdoor unit)

  13. INSTALLATION Outdoor Unit Spacing (More than 1 unit) Top View (Wall / Barrier restriction same as 1 outdoor unit)

  14. INSTALLATION Outdoor Unit Spacing (More than 1 unit) Top View (Wall / Barrier restriction same as 1 outdoor unit)

  15. INSTALLATION • Outdoor Unit Foundation • Floor location strength • Able to withstand the unit weight and vibration • Layout for drainage, piping & cables • Different level, avoid blocking. • Important for MDS260~300B(BR). Oil balancing pipe must be lower than the connection joint • Screw bolt required to further tighten the unit • Avoid the unit from falling due to earthquake

  16. INSTALLATION • Piping Installation • Ensure piping is dry, clean and no air leakage

  17. INSTALLATION • Piping Installation • Refnet & distributor joints to be install horizontally

  18. INSTALLATION • Piping Installation • Refnet & distributor joints to be install horizontally

  19. INSTALLATION • Piping Installation • EXV box to be install vertically

  20. INSTALLATION • Piping Installation • Insulation • Able to withstand the pipe heat • Heatpump Unit – heat resistance polyethylene foamed ( > 120 Deg C) • Cooling only - Polyethylene ( > 100 Deg C) • Insulation method • Thickness of insulation

  21. INSTALLATION Insulation Method Wrong Method Correct Method

  22. INSTALLATION • Thickness of insulation • Depends on pipe diameter • Notes: • Hot and wet environment, increase then thickness of the insulation • Cooling with ambient less than 10 deg C, recommended to insulate the liquid pipe.

  23. CONTROL Communication • Twisted Pair wired with shielding (20AWG) • Shield wire to be earth on 1 end of the network • Connected serially to the adjacent unit (Daisy Chain Connection) • Same polarity between units

  24. CONTROL Communication For the last indoor, Jumper JP-7 need to be shorted (Top left Corner of the indoor board) System Wiring

  25. CONTROL Communication System Wiring Ain = Terminal 30 Bin = Terminal 31 APC = Terminal 32 BPC = Terminal 33

  26. B A CONTROL Communication MDS080~240 Outdoor PCB Indoor PCB

  27. CONTROL Communication For the last indoor, Jumper JP-7 need to be shorted (Top left Corner of the indoor board) System Wiring - MDS260~300B(BR)

  28. CONTROL Communication MDS260/280/300 + MDS120/150BRM MDS130/150BRS Indoor Units

  29. CONTROL Control & Monitoring Software RS485 Gateway RS232 1. Review indoor unit status and error history 2. Monitor and control all indoor unit 3. Weekly timer and holiday timer setting Computer Indoor units Outdoor units Centralize Control

  30. Thank You