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Hochiki Europe (UK) Ltd – HE-PSU(1.25) Power Supply Installation Manual
HE-PSU(1.25)
Power Supply &
Battery Charger
Installation,
Commissioning
& Operating Manual
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Hochiki Europe (UK) Ltd – HE-PSU(1.25) Power Supply Installation Manual
CONTENTS
1.0 INSTALLATION...................................................................................................... 2
1.1 Safety .................................................................................................................2
1.2 General ............................................................................................................... 2
1.3 Mounting the Cabinet.......................................................................................... 2
2.0 COMMISSIONING.................................................................................................3
2.1 Mains Connection............................................................................................... 3
2.2 Load Connection.................................................................................................3
2.3 Fault/Healthy Connection................................................................................... 3
2.4 Battery Connection.............................................................................................3
3.0 OPERATION & MAINTENANCE............................................................................ 3
3.1 Specifications..................................................................................................4
1.0 INSTALL ATION
1.1 Safety
IMPORTANT - READ THIS SECTION FIRST!
Suppliers of artic les for use at work are required under section 6 of the Health and Safety at Work Act
1974 to ensure as reasonably as i s practical that the articl e wil l be safe and without risk to health when
properly used. An article is not regarded as properly used if it is used "without regard to any relevant
information or advice" relating to its us e ma de availa ble by the supplier.
This product should be installed, commissioned and maintained by or under the supervision of competent
persons according t o good engineering practice and:-
IEE regulations for the electrical equipment of buildings.
Codes of practic e.
Statutor y requirements.
Any instructions specifically adv ised by the manufacturer.
According to t he pr ov isions of the act you are therefore requested to take such steps as are necessary
to ensure that any appropriate information about this product is made available by you to anyone
concerned with i ts use.
This equipment is designed to be operated from 220-240V AC mains supplies and is of class I
construction. As such it must
installation.
Failure to ensure that all conductive accessible par ts of this equipment are adequately bonded to the
protective earth will render the equipment unsafe.
be connected to a protective earthing conductor in the fixed wiring of the
1.2 General
Install ation of the panel should only be carried out by qualified personnel. The electr oni c components
within the panel can be damaged by static charge. Suitable precautions must be taken when handli ng
circuit boards. Never insert or remove boards or components with power on.
1.3 Mounting the Cabinet
The site chosen for the location of the panel should be clean and dry , and not subject to shock or
vibration. The tempe ra tu re shou ld be in the ran ge -5° to +50° C , and the humidity should not exceed
95%.
Using the cabinet as a template, mark the position of the four fixing holes, ensuring that the wall is flat at
the chosen location, drill and plug the wall and fix t he cabinet usi ng the four fixings cabling.
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Hochiki Europe (UK) Ltd – HE-PSU(1.25) Power Supply Installation Manual
Suitable cables should be brought into the cabinet using the knockouts provided, making sure that tails are
long enough to reach the relevant terminals. The screen or drain wire should be bonded to earth at one
location only, it should be continuous throughout t he c ircuit. Terminal s will acc ept one single or
stranded conductor up t o 2.5 mm
2
.
2.0 COMMISSIONING
2.1 Mains Connection
The mains is connected to the PSU via a fused terminal block marked with live, neutral and earth
symbols. It is imperative that the equipment is soundly eart hed and this connecti on should be made
and checked fi r st.
Following connection of the live and neutral cables and with no other connections made, the unit should be
powered and the batter y output measured at around 28 volts DC.
2.2 Load Connection
Terminals are prov ided for connection to the load and are mark ed + and -. The voltage at these
terminals under normal conditions (i.e. off load) should be around 28.5 to 29 volts. With the mains
power off, connect the load cables.
Double check t he load c onnec tion for correct polarity before switching on mains. After switc hing on
mains check the v oltage at the load for correct polarity.
Do not connect or disconnect the wiring to the load terminals with mains or battery power on.
2.3 Fault/Healthy Connection
Switched -VE outputs are available for signalling of power fault and power healthy indication marked PO
(power on) and PF (power fault). Under normal circumstances (mains and battery connect ed and fuses
intact) t he -VE appear s at the PO terminal.
Failure of the m ains or bat tery supply will transfer the -VE to the PF terminal.
A volt free changeover contact is also available for fault/healthy signalling which can be used to switch
other voltages or signals
2.4 Battery Connection
An output is provided via flying leads with 0.25 inch spade receptacles for connection to sealed lead acid
rechargeable bat teries. Normally two 12 volt batter ies are connected in series and then to the charger.
Before connecting the batteri es measure the output voltage on the leads. It should be 28 volts ±0.1
volt. If the voltage differs from this, adjust it to the correct level using the control on the PCB (this may
vary from the factory setting due to variations in mains supply voltage).
It is very important that the correct polarity is observed before connecting the batteries as the wrong
polarity connection will blow the charging fuse and may damage the unit.
With the batteri es connected and the mains on the fault contac t shoul d sho w continuity between the “C”
and “NC” terminals. With the battery on mains disconnect ed the fault contact should show continuity
between the “C” and “NO” termi nals.
With the battery conne c ted sw itch of f the ma ins and ens ure that a supp ly is pres ent at the load terminals.
3.0 OPERATION & MAINTENANCE
Under normal circ u ms tances the power supply requ ires no attention and will transfer automatically to
battery supply in the event of a mains failure. Periodic checks should be made however to ensure
maximum life of the seal ed lead ac id battery.
To do this, disconnect the battery and using a calibr ated voltmeter ensure that the v oltage on the
battery leads is 28 volts ±0.1 volt. Adjust this if necessary usi ng the control on the PCB.
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Hochiki Europe (UK) Ltd – HE-PSU(1.25) Power Supply Installation Manual
Disconnect the m ains supply and ensure t hat the fault contact operates and that the batt er y can suppl y
the load.
3.1 Specifications
Frequency - 50/60 HZ
Input voltage r ange - 220 to 240 V AC
Battery charge voltage - 28 V DC
Load voltage - 29 V DC (nom)
Max continuous load - 625mA
Construction - Class I
Terminal capacity - 2.5 mm
Fault contac t rating - 1 amp 3O V DC
Battery type - Sealed lead acid
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Hochiki Europe (UK) Ltd
Grosvenor Road, Gillingham Business Park,
Gillingham, Kent, ME8 0SA, England
Telephone: +44(0)1634 260133 Facsimile: +44(0)1634 260132
Email: sales@hochikieurope.com
Web: www.ho c hi ki e u rop e .c om
Hochiki Europe (UK) Ltd. reserves the right to alter the specification of its products from time to time without notice. Although
every eff or t h as be en m ade to ensur e th e acc uracy of the inform ati on contained w ith in th is doc u m ent it is not war r anted or
represented by Hochiki Europe (UK) Ltd. to be a complete and up-to-date description. Please check our web site for the
latest version of this docu m ent.
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