Heatrae Sadia FBM series User manual

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FBM RANGE
Fitting Instructions and User Guide

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NOTICETOINSTALLER
Thesewaterheaterhaveabuiltincoldwaterfeedcisternandfloatvalveand
can supply a number of hot water outlets.As the hot water flows by gravity
thewater heater must bemounted higher than thetaps they serve. Ideally
the heater should be fitted close to the point where hot water is required
most frequently. pipe runs sholud be kept to a minimum.
Theinstallationmust be carried out inaccordancewith the relevant
requirementsof:
• TheappropriateBuildingRegulationseither TheBuilding
Regulations,TheBuildingRegulations(Scotland)orBuilding
Regulations(NorthernIreland).
• The Water Fittings Regulations or Water Byelaws in Scotland.
SITINGTHEHEATER
The FBM Range is suitable for wall mounting only. Ensure that the wall is
capableofsupporting the full weight of thewaterheater(see chart).
Mount the water heater as higher as possible, the top of the water heater
must be at least 1.2 m (4 feet) above the highest draw off point to ensure a
reasonablepressure,allowing225mm(9”)abovetheheaterforaccesstothe
cistern tank. DO NOT install in a position where the heater is liable to be
subjectedfrostconditions.
Refer to Fig. 1 and Dimension Chart for fixing centres.Atemplate is also
supplied with the FBM25 and 50.
FBM 25 and 50:
•Usingthe template provided, markofffixing positions of thetwo top holes
(ensuringthattheyarelevel).
•Drill and plug these positions.
•Screwinfixingboltsleavingunderside of head 12mm from wall.
•Hang heater onto fixing bolts ensuring they engage in keyhole slots.
•Markbottom centre fixing (access is easier if terminalcover is removed).
•Removeheater, drill andplugthisposition.
•Replace heater onto keyhole slots, secure by screwing in bottom fixing
bolt.

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F
G
FBM 75 and 125:
•Markpositions of two bottom fixing points (ensure heater is level).
•Drill and plug these positions.
•Screwinfixing bolts leaving head 5mmfromwall.
•Locate slotted bottom fixing brackets onto fixing bolts, mark top two
fixingpositions.
•Removeheater, drill and plug thesepositions.
•Replace heater onto bottom fixing bolts, secure by screwing in top fixing
bolts.
•Tightenbottomfixing bolts.
FBM25 19 59 682 609 250 657 - 445 456 84
FBM50 30 95 974 609 250 949 - 445 456 84
FBM75 36 131 1076 610 295 - 1132 445 456 106
FBM125 48 213 962 729 429 - 1001 565 590 102
Weight
Empty Full
kg kg
A B C D E F G H
mm mm mm mm mm mm mm mm
Model

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WATERREGULATIONS
To meet the requirements of the Water Supply (Water Fittings) Regulations
1999,WaterByelaws 2000, Scotland and the WaterRegulationsNorthern
Ireland.
1 Aservicing valve shall be installedon the inlet pipe adjacentto the
storage cistern. Schedule 2 - Section 16(2).
2 Aservicingvalve shall be installed on theoutletpipeof the storage
cistern. Schedule 2 - Section 16(3).
WATER CONNECTION (Refer to Fig.1)
Mountthewater heater in the desiredpositionin accordance with the above
requirements.TheFloatValve,Overflowfitting,DipTube and Screened Vent
aresupplied loose within the cisterntank.Removethecisterncover,
assemblethe Float Valvebody, arm andfloat.TheFloatValve can be
mounted on either the left or right of the heater by cutting a suitable hole
using the pre-punched holes in the outer case as a guide. Use a sharp hollow
punch, hole saw or cutter and ensure the hole edge is clean and free from
notches and swarf. Secure Float Valve to the cistern tank wall. NOTE washer
shouldbebetweenvalve body and cistern wall, securebytighteningbacknut
onoutsideofheater.The Overflow fittingcanalsobe mounted on the leftor
rightbydrilling the appropriate position asfortheFloat valve.Attach the
Overflowfitting with the filter screenhousingto the outside of the heater, the
washer and backnut should be assembled from inside the cistern tank. The
DipTubeshould be pushed into theOverflowfitting inside the cistern tank
such that the lower edge of the tube will be immersed when the cistern is
filledwithwater. The Screened Ventshould be snapped into the prepared
holein the cisterncover, when fittingsupport the material around the hole to
avoiddamagingthecover.
TheFloat Valveissuitableforinletpressures up to 7bar(100p.s.i.), therefore
it is recommended that the cold water supply is taken from the mains. For
higherpressuresthe float should be replacedbyoneof 6” diameter.TheFloat
Valveisthreaded1/2.BSP(for15mmpipe).
TheOverflow is fittedwith a meshscreen to preventthe ingress of insects.
Theconnectionto the overflow pipe is 22mmcompressionfor22mmo/d pipe.
Theoverflow pipe mustbe laid to acontinuous fall and terminate in a position
where it can be readily seen.

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The outlet fitting is located on the underside of the heater and is threaded
3/4.BSP Female on the FBM25, 50 and 75, and 1”BSP Female on the
FBM125.
A Drain fitting is provided and is located on the element plate assembly under
theterminalcover. Ensure theelectricalsupply is disconnected before
removingtheterminalcoverand draining theheater.
To fill the heater the cold water supply should be turned on and a hot outlet
suppliedbythe heater opened. Whenwaterflowsfrom the outlet, turn offand
allow cistern tank to fill.Adjust the float such that the Float Valve closes
whenthewaterlevel in the cistern corresponds withthemarkedwaterlevel
line.Afteradjustment replace the cistern coverandsecureusing the cover
screw(s)provided.
ELECTRICALCONNECTION
WARNING This appliance must be earthed. Installation must conform
with current IEE Wiring Regulations. It should be connected to a 230/
240V a.c. electrical supply via a double pole isolating switch with a
minimum 3mm contact separation in both poles. The supply cable
must have a minimum cross sectional area of 1.5mm2for each
element. NOTE 6kW units have two elements.
ELEMENT
3kW AT 240V
L
N
EARTH POST
THERMOSTAT
THERMAL
CUTOUT
230/240V ac SUPPLY
VIA DOUBLE POLE
ISOLATING SWITCH
Fig 2. Schematic Wiring Diagram 3kW units

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The cable entry is suitable for flexible cable or conduit connection and is
locatedonthelefthandsideoftheterminalcover.Removetheterminalcover
byremovingthefixingscrews.
Flexible cable: Strip the outer sheath and insulation of the cable to the
required lengths ensuring that the outer sheath will be held in the cable grip
whentheconnectionsaremade.
Conduit: The cable entry hole has a diameter of 20mm to accept standard
20mmconduit.
The conductors should be connected as follows (see Fig. 2 or 3).
Live(colouredBrownorRed)toTHERMOSTATterminationmarkedL.
Neutral(colouredBlue or Black) to ELEMENTterminationmarkedN.
Earth(colouredGreen/YelloworGreen)to EARTHPOSTmarked .
If Twin and Earth cable is used the bare Earth conductor must be sleeved.
Ensure all electrical connections are tight. If using flexible cable secure by
clamping the outer sheath in the cable grip and tightening cable grip top bar.
Replacetheterminalcoverensuringtheshakeproofwashersareinposition
underthe head of thefixing screws.
ELEMENT
3kW AT 240V
EARTH POST
THERMOSTAT
THERMAL
CUTOUT
ELEMENT
3kW AT 240V THERMOSTAT
THERMAL
CUTOUT
L
N
230/240V ac SUPPLY
VIA DOUBLE POLE
ISOLATING SWITCH
N.B. DO NOT LINK ELEMENTS
EACH ELEMENT HAS SEPARATE
THERMOSTAT AND THERMAL CUT-OUT.
Fig 3. Schematic wiring Diagram 6kW units

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DO NOT switch on electrical supply until the heater is full of water.
THERMOSTAT
An adjustable Cotherm TSD rod type thermostat is fitted. This should be set
during installation by rotating the setting dial with a small screwdriver to the
maximum position, marked by “+”, and then turning back 45º. The maximum
setting is 70ºC and the minimum is 18ºC. Settings below 65ºC are
recommendedin hard water areas tominimise the build-up of scale.Afterthe
first heating cycle check the water temperature and adjust the thermostat as
necessary.
OVER-TEMPERATURECUT-OUT
TheFBMheaterisfittedwithmanuallyresettableover-temperature
protection.Intheevent of the unit overheating duetoathermostat
malfunctionorsettingtoohightheOver-temperatureCut-out(s)willinterrupt
thepowerto the element(s). On3kWunits the Over-temperature Cut-out is
adjustableandshould be set approx. 15ºC abovethecontrolthermostat
setting.ThemaximumOver-temperatureCut-outsettingshouldbe85ºC.The
6kWunitshavetwofixedtemperatureOver-temperature Cut-outs, one
protectingeachelement.IftheOver-temperature Cut-out(s) operate the
element(s)willremainoffuntiltheOver-temperatureCut-out(s)arereset.Do
notresetthe Thermal Cut-out(s) until thecauseofoperation has been
investigated.
Tore-set,DISCONNECTTHEELECTRICALSUPPLYBEFORE REMOVING
THETERMINALCOVER, remove terminal cover, check theoperationofthe
Thermostat and reduce its temperature setting or replace if faulty. Press the
RESETbuttononOver-temperatureCut-out(s)(black on 3kW units, red on
6kW units), replace the terminal cover before switching on electrical supply.
SPAREPARTS
Shouldafault occur or maintenance be requiredontheheater a full range of
SparePartsisavailable.Please contacteitheryour Distributor or Heatrae
Sadiaforfurtherinformation.

836005142 issue 8
Heatrae Sadia Heating
Hurricane Way Norwich NR6 6EA
www.heatraesadia.com
MainNo: 01603 420100
MainFax: 01603 420218
Sales: 01603 420110
Sales Fax: [phone]
Service: 08701 600125
Service Fax: [phone]
Guarantee
Goodsare Guaranteed and soldsubject to our standardconditionsofsale.A
copy of these conditions will be supplied on application.
Theinnercontainerofthe FBM is guaranteed for five yearsagainstfaulty
manufactureormaterialsprovidedthat:
It has been correctly installed as per the instructions contained in the
instructionmanualandallrelevant Codes of Practice and Regulations inforce
at the time of installation.
It has not been modified in any way, other than by Heatrae Sadia Heating.
The damage is not due to scale or freezing.
It has only been used for the storage of category 1 or 2 water.
It has not been tampered with or been subjected to misuse or neglect.
Within 60 days of installation the user completes and returns the certificate
suppliedalongwith the proof of purchasetoregisterthe product.
TheFBMimmersionheater, thermal controlsandballvalveareguaranteedfor
two-yearsagainstfaultymanufacture or materials from the date ofpurchase.
Evidenceof purchase and dateof supply must besubmitted.
Thisguarantee does not affect yourstatutoryrights.
Intheeventoftheunitbeing returned under guarantee it should be
despatcheddirectly to your supplierandnot to Heatrae SadiaHeating
togetherwithdetailsof the installation and proof of purchaseand/or
installationdate.
This guarantee does not affect the statutory rights of the consumer.
Environmental Information
This product is manufactured from many recyclable materials. At the end of
its useful life it should be disposed of at a LocalAuthority Recycling Centre.