Page 1 MCQUAY DIGITAL SCROLL SYSTEM Installation
Page 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
Page 3 INSTALLATION Unit Installation Indoor Unit Outdoor Unit Note: Installation of indoor unit is same as normal direct expansion unit.
Page 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
Page 5 INSTALLATION Handling Outdoor Unit Correct
Page 6 INSTALLATION Handling Outdoor Unit Wrong
Page 7 INSTALLATION CorrectWrong
Page 8 INSTALLATION
Page 9 INSTALLATION Outdoor Unit Spacing (Single Outdoor Unit) Wall / Barrier higher than unit Side View Wall / Barrier lower than unit
Page 10 INSTALLATION Outdoor Unit Spacing (Single Outdoor Unit) Top View (Barrier higher than unit)
Page 11 INSTALLATION Outdoor Unit Spacing (Single Outdoor Unit) Top View (Barrier lower than unit)
Page 12 INSTALLATION Outdoor Unit Spacing (More than 1 unit) Top View (Wall / Barrier restriction same as 1 outdoor unit)
Page 13 INSTALLATION Outdoor Unit Spacing (More than 1 unit) Top View (Wall / Barrier restriction same as 1 outdoor unit)
Page 14 INSTALLATION Outdoor Unit Spacing (More than 1 unit) Top View (Wall / Barrier restriction same as 1 outdoor unit)
Page 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
Page 16 INSTALLATION Piping Installation Ensure piping is dry, clean and no air leakage
Page 17 INSTALLATION Piping Installation Refnet & distributor joints to be install horizontally
Page 18 INSTALLATION Piping Installation Refnet & distributor joints to be install horizontally
Page 19 INSTALLATION Piping Installation EXV box to be install vertically
Page 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
Page 21 INSTALLATION Insulation Method Wrong Method Correct Method
Page 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.
Page 23 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 CONTROL Communication
Page 24 System Wiring CONTROL For the last indoor, Jumper JP-7 need to be shorted (Top left Corner of the indoor board) Communication
Page 25 System Wiring CONTROL A in = Terminal 30 B in = Terminal 31 A PC = Terminal 32 B PC = Terminal 33 Communication
Page 26 BABA Indoor PCB Outdoor PCB MDS080~240 CONTROL Communication
Page 27 System Wiring - MDS260~300B(BR) CONTROL For the last indoor, Jumper JP-7 need to be shorted (Top left Corner of the indoor board) Communication
Page 28 Indoor Units MDS260/280/300 MDS130/150BRSMDS120/150BRM + CONTROL Communication
Page 29 Gateway Computer Indoor units Outdoor units Centralize Control RS485 RS232 CONTROL 1. Review indoor unit status and error history 2. Monitor and control all indoor unit 3. Weekly timer and holiday timer setting Control & Monitoring Software
Page 30 Thank You