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MAXA HI-T - 7 Hns System Description

MAXA HI-T
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Hi‐TCentralizedcontroller
42
7 HNSSYSTEMDESCRIPTION
TheHNSsystemcanbecoupledonlywiththefollowinghydronicunits:
• HWF/HWIfancoils;
• LWF/LWIfancoils;
• HCA/BandHCA/4Bhydroniccassettetypes;
• HCNductedtypes.
NOTE:theinstallationwiththeMIwallmountedtypesisnotpossible.
Thereare2waystoinstallan
HNSboxsystem:
1)PurchaseoftheDRAL‐NETandtheSBmodulesseparatelyandsubsequentinstallationontheunitatcustomer’sexpenses.Inthis
case,itispossibletoinstalltheDRAL‐NETcontrolonthewallinordertomakeaccessiblethetemperature’sknob,whichallowsan
adjustingof
thesamewithinaprefixedcontrolsetbytheHi‐T.Forexample,supposingtheambienttemperaturesetat20°C(viaHi‐
T), it is possible, by means of the DRAL‐NET’s knob, to adjust the set within a given temperature range, such as +/‐5°C, +/‐6°C
(adjustingby
parameter),andthelike.Inthiscase,thewholeinstallation’sprocedureisattheinstaller’sexpenses.Byandlarge,the
DRAL‐NETisfixedonthewallwhiletheSBinterfacehastobeinstalledonboard.UseaTTLconnectingcable(standardprovided,
max.length4m)betweentheDRAL‐NET
andtheSBinterface:
2)PurchaseoftheHNSboxwhere
,inside,theDRAL‐NETandtheSBdevicesarealreadyfittedandpre‐wired,thusprovidingthe
customerwithaterminalboardforconnectingthehydronicunits.Insodoing,itisnotpossibletolocallyadjustthetemperatureby
meansoftheDRAL‐NETdeviceasitisinstalled
insidetheBOX.Thehydronicunits’temperaturesandsettingparameterscanallbe
controlledvia the Hi‐Tpanel. Asarule ofthumb, the HNSbox(IP56GW44207 Gewissbox)is installed close tothehydronic unit,
wall built‐in or on the side of the hydronic unit, in case
of fan coils with or without body, or upon the false ceiling, in case of
hydroniccassettetypesorductedtypesinstalledontothefalseceiling:
The Hi‐T control panel allows the visualization of the
working parameters of every single hydronic unit and those of every
singlezone.
Itispossibletomanageuptono.80hydronicunits,dividedintono.9thermalzones.Everyhydronicunit,oncesetinaccordance
withtherelatedbelongingzone,usesitsownprobeasaworkingprobe.
Shouldthe
HNSsystembecoupledwithouri‐HWAK/WPV2/V2+andi‐HPchillers,itispossibletomanage,viaasingleHi‐Tcontrol
panel,n°7chillersincascadeandno.80hydronicunitsdividedintono.9thermalzones.TheconnectionamongtheHi‐Tpanel,the
minichillers and the
hydronicunits is very simple: it is made by meansofa SSTP(ex.CAT 5) shielded twisted cableconnectedin
series.
Possibleconfigurations
• n°1Chillerterminalunitsnotconnected

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