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8. PMV KIT OUT LINE
8-1. Purpose of Using
In the case of very quiet room, and also very nervous for indoor unit noise level, PMV Kit should be installed
before indoor unit which should become lower noise level.
Multi-indoor units have Pulse Motor Valve (PMV) for control refrigerant flow.
Multi-air conditioner, on unstable condition, for example starting time, flowing noise of refrigerant can be heard
conspicuously.
This refrigerant noise mainly comes from PMV. Especially very quiet room, for example bed room, somebody
feels uncomfortable for this refrigerant noise from PMV.
Main purpose of PMV Kit restrains refrigerant noise which comes from PMV installed in indoor unit.
PMV Kit should be installed at out of residence area, for example back of ceiling board.
After installed PMV Kit, control function of refrigerant shifts to PMV of PMV Kit and PMV in indoor unit does not
be used.
After that, refrigerant noise of PMV will be coming from back ceiling board, and refrigerant noise of indoor unit
may be restrained.
[Image of installation]
Without PMV Kit
With PMV Kit
8-2. How to Use
Connect PMV Kit between refrigerant pipe of indoor unit.
Connect control cable of PMV Kit to control
P.C. board of indoor unit, then PMV Kit is
controlled by indoor unit side.
But, before connecting PMV Kit to
P.C. board of indoor unit, PMV of
indoor unit should be fully opened.
To
outdoor unit
To
outdoor unit
Refrigerant pipe
Refrigerant pipe (Liquid side)
Connection cable
Ceilling
Ceilling
Indoor unit
Indoor unit
[Living space]
[Living space]
Refrigerant noise is small.
PMV Kit
[Underpart of the roof]
[Underpart of the roof]
gobo... gobo....
Shuru shuru...
gobo... gobo....
Shuru shuru...
Binding band L
Binding band M
Binding band M
Heat insulating pipe
Refrigerant pipe
(Liquid side)
Heat insulating pipe
Refrigerant pipe
(Liquid side)
Binding band M
Binding band L
Binding band M
Refrigerant pipe
(Gas side)