MCQUAY DIGITAL SCROLL SYSTEM

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)
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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)
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INSTALLATION
Outdoor Unit Spacing (More than 1 unit)
Top View (Wall / Barrier restriction same as 1
outdoor unit)
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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 MDS260300B(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 ( gt 120 Deg C)
• Cooling only - Polyethylene ( gt 100 Deg C)
• Insulation method
• Thickness of insulation

21
INSTALLATION
Insulation Method
Wrong Method
Correct Method
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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.

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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

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CONTROL
Communication
For the last indoor, Jumper JP-7 need to be
shorted (Top left Corner of the indoor board)
System Wiring
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CONTROL
Communication
System Wiring
Ain Terminal 30 Bin Terminal 31 APC
Terminal 32 BPC Terminal 33
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CONTROL
Communication
MDS080240
Outdoor PCB
Indoor PCB
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CONTROL
Communication
For the last indoor, Jumper JP-7 need to be
shorted (Top left Corner of the indoor board)
System Wiring - MDS260300B(BR)
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CONTROL
Communication
MDS260/280/300

MDS130/150BRS
MDS120/150BRM
Indoor Units
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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
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Thank You