Mitsubishi Heavy Industries FDUA160AVSAVH Service Manual page 115

2. ZONE CONTROL INSTALLATION MANUAL (FDUA160VH only)
①
System outline
Please refer to the following information to design your ducted air-conditioning system.
Attention
• This unit can control up to 4 zones, including common zones (A zone in which a damper is
not installed).
Do not exceed 4 zones.
• In zone control system, one or two remote controls (Master and slave) can not control multiple indoor units.
Connect one or two remote controls with one indoor unit.
Advice
Common zone: A zone in which a damper is not installed.
Spill zone: A zone in which a damper open automatically.
a) With comon zone
Relay Parts
Damper 1
Common zone Zone 1
Fig 1 shows a system example, where common zone, 3 damper motors 2 remote controls are connected.
b) No comon zone
(Spill zone setting required)
Relay Parts
Damper 1 Damper 2
Zone 1 Zone 2
Spill zone
Fig 2 shows a system example, where no common zone, 4 damper motors, 2 remote controls are connected.
Zone remote Maximum 2 remote controls can be
control connected.
Only drive open, drive close damper motor
can be connected. (Spring motor damper
can not be used.)
Damper motor
If you use 24V AC motors, ensure the
(Locally supplied)
transformer is adequately sized for the zone
motors connected and is suitable for the
installation conditions.
②
Duct design
Attention
• Design the duct so that the common zone or spill zone equal 50% of total air
• Ducts in zones other than common zone or spill zone should have equal static pressure
(equal air
• Be sure to also refer to the indoor unit installation manual.
• Common zone installation is recommended. However if you prefer no common zone system,
you must set spill zones with the remote control.
a) In the case of 4 zones
Relay Parts Ducted indoor unit
Damper 1
Common zone Zone 1
50% of 17% of
total air flow total air flow
Master Zone
Remote Control
Ducted indoor unit
Slave Zone
Remote Control
Damper 2 Damper 3
Zone 2 Zone 3
<Fig 1>
Master Zone
Remote Control
Ducted indoor unit
Slave Zone
Remote Control
Damper 3 Damper 4
Zone 3 Zone 4
<Fig 2>
Symbol
Damper moter
Spill zone
Master Zone
Remote Control
Slave Zone
Remote Control
Damper 2 Damper 3
Zone 2 Zone 3
17% of 17% of
total air flow total air flow
b) In the case of 3 zones
Relay Parts
Common zone
50% of
total air flow
c) In the case of 2 zones
Relay Parts
③
Relay parts and transformer
Choosing the relay parts and transformer installation lacation
• Do not install in outdoor location.
Avoid locations where the relay parts and transformer are exposed to direct sunlight or other •
sources of heat.
• Select a location where easy wiring access to the power source is available.
Avoid locations where combustible gases may leak, be produced, flow, or accumulate. •
• Select a level location that can bear the weight and prevent vibration of the relay parts and
transformer.
Legend
• Avoid locations where the relay parts and transformer are exposed to oil, steam, or sulfuric
Air
gas.
• Do not install in location that ambient temperature exceeds 60°C and relative humidity exceeds
Duct
80%.
• Do not install on top of the indoor unit.
Damper
114
- -
'21 • PAC-SM-398
Master Zone
Remote Control
Ducted indoor unit
Slave Zone
Remote Control
Damper 1
Zone 1
25% of 25% of
total air flow total air flow
Master Zone
Remote Control
Ducted indoor unit
Slave Zone
Remote Control
Damper 1
Common zone Zone 1
50% of 50% of
total air flow total air flow
Damper 2
Zone 2