Bell -DDA User manual

Bell
Brand
Bell
Model
-DDA
Type
User manual
Flats
ElectricalCupboard
DoorPanel
First
Phone
Z
I
R
O
T
Second
Phone
Z
I
R
O
T
203,204
LockRelease
BELL-DDA
WiringforBELL-DDASystems
13:4456
-
+
CO
NO
NC
TS2000-BST
TimeClock
Bell
System
340/PS4
PowerSupply
PD-085Issue4
T
O
-
R
+
H
C
Z
DDA
Interface
PCB
2
TORHC
61
Speech
Unit
-
LOCK
Trades
Button
(optional)
+
TelephoneModels:
801801S801PS
500D500PD
I
1
I
2
I
3
ToAdditionalTelephones
(Telephones)Ltd
www.bellsystem.co.uk
*
*AmodelPS4PowerSupplymustbeusedabove6way
oronsystemswithmorethan1phoneperflat/button.
B
These2Cores
1.0mmCSA
Minimum
2
InstallationofDoorEntrySystems
Theisdesignedtobewall-mountedinaconvenientindoorlocation.
The,containingthespeechunitandDDAinterface,isavailablewitheitherasurfaceor
flush-mountingbackbox.Normallythiswouldbemountedonanoutsidewallnearthefrontdoor,andif
possibleinashelteredlocation.
Theisdesignedforuseonaninwardopeningdoorfittedwithasurface
night-latchtypelock.Thisshouldbeinstalledwithasmallamountofplayonthedoorasoperationwillbe
impairediftootight.
Thisisusedinconjunctionwithatime-clocktoallowtradesmenaccess
duringrestrictedhours.
Foroptimumspeechclarity,itisstronglyrecommendedthatthissystemisinstalled
usingtwisted-pairtelephonecable(egtypeCW1308),unlessotherwisestated.Useoneofthepairsforthe
R&Oconnectionsbetweenthespeechunitandthetelephone.
Connectallitemsbyfollowingthediagramoverleaf.Itisstronglyrecommendedthatasingle
telephonebeconnectedatatimeandfullytestedbeforeproceedingtothenext.
Thespeechunithastwocontrolsattherearforadjustmentofspeechlevels:
VolumeA:SpeechlevelattheEntrancePanel
VolumeB:SpeechlevelattheTelephone
Iffeedbackisexperienced(ahowlorwhistle)turnbothcontrolsto'off'andthenslowlyadjusteachupinturn
untilasatisfactorylevelofspeechisattained.
Nospeech/insufficientspeech:InitiallyestablishcorrectoperationoftheSpeechUnitby
disconnectingalltelephonesandre-connectingasingletelephonewithashortlengthofcable(ROTonly);
Reconnectthetelephonesoneatatimeuntilthefaultre-appears.Note:speechwillbeimpairedifoneor
moretelephonesareleftoffthehook.
DoorEntryTelephone
Entrancepanel
Model203ElectricLockRelease
Tradesmanbutton(optional):
Cablerequirements:
Installation:
Speechadjustment:
Troubleshooting:
ImportantSafetyInformation
Themustbeplacedinaprotectedindoorenvironmentsuchasan
electricalcupboard,closetoa240VACelectricalsupplyandlocatedclosetotheentrance.It
mustbewall-mountedontoplasterboard,woodorasimilarnon-conductivematerial.
Connectionstothe240VACmainssupplymustbecarriedoutbyaqualifiedelectricianor
similarcompetentperson,andmadeinaccordancewithacceptedsafetypractices.Atwo-
poleswitch(asprovidedbyaConsumerUnitorSwitch-Fuse)mustbeincludedtoisolate
bothLiveandNeutralduringInstallationorMaintenance.Thetransformerisprotectedby
fuses;alwaysreplacethesewiththecorrecttypeandrating.
UseonlymainscabletoBS6004orequivalent,withinthefollowingspecifiedlimits:
PowerSupplyUnit
ConductorDiameter:
CableDiameter:
Min.1.0mm(0.8mm)
2
Min.4.0mm
Max.2.25mm(4mm)
2
Max.8.0mm
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Bell -DDA User manual

Bell
Brand
Bell
Model
-DDA
Type
User manual
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