Mitsubishi PUZ-A18NHA6 - Ground

79
Special function
(a)Low-levelsoundprioritymode(Localwiring)
 UnitentersintoLow-levelsoundprioritymodebyexternalsignalinputsetting.
 Inputtingexternalsignalstotheoutdoorunitdecreasestheoutdoorunitoperationsound3to4dBlowerthanthatofusual.
 Addingacommercialtimeroron-offswitchcontactorsettingtotheCNDMconnectorwhichisoptionalcontactorfordemand
inputlocatedontheoutdoorcontrollerboardenablestocontrolcompressoroperationfrequency.
Note:Theperformancedependsontheloadofconditionedoutdoortemperature.
 Howtowire
 1)MakethecircuitasshownabovewithAdaptorforexternalsignalinput(PAC-SC36NA).
 2)TurnSW1toonforLow-levelsoundprioritymode.
 TurnSW1toofftoreleaseLow-levelsoundprioritymodeandnormaloperation.
(b)Demandcontrol(Localwiring)
 Demandcontrolisavailablebyexternalinput.Inthismode,powerconsumptionisdecreasedwithintherangeofusual0to
100%.
 Howtowire
Basically,thewiringisthesameas(a).
ConnectanSW1whichisprocuredatfieldtothebetweenOrangeandRed(1and3)oftheAdaptorforexternalsignal
input(PAC-SC36NA),andinsulatethetipofthebrownleadwire.
Itispossibletosetittothefollowingpowerconsumption(comparedwithratings)bysettingtheSW7-1,2.
SW7-1 SW7-2
OFF
0% (Operation stop)
75%
50%
OFF
ON
OFF
OFF
ON
Max. compressor frequency
(SW1 on)
CNDM
X
SW1
~
X
Max. 10 m [33 ft] including local wiring
SW1 : Switch
X : Relay (Contact spec. : DC1mA)
Relay
supply
Red 3
Brown 2
Orange 1
Purchased locally
Adaptor for external
signal input
(PAC-SC36NA)
Outdoor unit
controller board
3
2
1
Insulate this point securely as
this is not used.
<Low-level sound priority mode circuit>
OCH577A