Heatrae Sadia MULTIPOINT 75 User manual

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MULTIPOINT 75 / 100
Fitting Instructions and User Guide

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INTRODUCTION
ThankyouforpurchasingaHeatraeSadiaMultipoint75/100unventedwater
heater.TheMultipointwaterheater is manufactured inthe UK tothe highest
standards and has been designed to meet all the latest relevant safety
specifications.
To make installation quicker and easier the Multipoint 75 / 100 water heaters
incorporateaninternalcheckvalve,Expansionrelief valve, expansionvessel
andfactoryfitted temperature / pressure reliefvalves.
Pleasereadandunderstandtheseinstructions before installing your
Multipoint water heater. Particular attention should be paid to the section
headedIMPORTANTINSTALLATIONPOINTS. Followinginstallationand
commissioning,the operation of the heatershould be explained to the
customerandthese instructions left with them forfuturereference.
TECHNICALSPECIFICATIONS
Electrical Rating 3.0kW @ 240v / 2.8kW @ 230v
6.0kW @ 240v / 5.5kW @ 230v
Capacity 75and 100 litres
Weight(100Litre) 50Kg(empty), 160Kg (full)
Weight(75Litre) 38Kg(empty),123Kg(full)
Operatingpressure 0.35 MPa (3.5 bar)
Ratedpressure 0.6 MPa (6.0bar)
Expansionvessel charge pressure 0.35 MPa (3.5 bar)
Expansionrelief valvesetting 0.6MPa (6.0 bar)
Minimumsupplypressure 0.08MPa(0.8bar)
Maximum supply pressure to PRV 1.6MPa(16.0bar)
Temperature/ PressureReliefValve 90°C / 0.7 MPa (7.0 bar)
PERFORMANCE
Model
75 litre 3kW
75 litre 6kW
Heat up
(minutes)
88
44
Recovery
(minutes)
62 (cylinder one)
88 (cylinder two)
31 (cylinder one)
44 (cylinder two)
84 (cylinder one)
120 (cylinder two)
42 (cylinder one)
60 (cylinder two)
Heat loss in 24hr
(kWh)
1.8
1.8
100 litre 3kW 120 1.8
100 litre 6kW 60 1.8

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Figure1:MultipointWaterHeater-DimensionsandImportantFeatures
COMPONENTCHECKLIST
Beforecommencinginstallationplease check that the following components
havebeensuppliedin the Installation Kit:
•Combinedpressurereducingvalveandstrainer(x1)
•Tundish(x1)
•Mountingbrackets(x2)
•Mountingbracket fixing bolts(x6)
DIMENSION
A
B
C
D
75 LITRE
824
911
1055
843
100 LITRE
982
1069
1213
1001
1 TEMPERATURE /
PRESSURE RELIEF VALVES
2 OUTLET
3 DISCHARGE AND TUNDISH
4 THERMOSTATS
5 ELEMENT PLATE ONE
6 CUTOUTS
7 TERMINAL BLOCK
8 CABLE GRIP
9 EXPANSION VESSEL
10 DRAIN COCK
11 NON RETURN VALVE
12 EXPANSION RELIEF VALVE
13 ELEMENT PLATE TWO
14 INLET
15 INDICATOR LIGHTS
7
8 9
6
5
4
3
2
12
11
13
14
15
1
10
729
565
430
79
ABCD

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2.0GENERALREQUIREMENTS:
2.1 The Multipoint must be vertically wall mounted using the wall bracket
supplied. The water connections must always be at the bottom of the
unit.
2.2 Enoughspace should be leftbelow the unit forpipeconnections and
abovetheunit foraccesstotheTemperature/PressureReliefValves(400
mmminimum).Refer to Figure 1 andtheDimensionsTabletodetermine
asuitablepositionfor the heater.
2.3 Ensure that the wall can support the full weight of the unit and that there
arenohidden services (electricity,gasor water) below the surfaceofthe
wall.
2.4 DONOT install where the unitmayfreeze.
2.5 National Wiring Rules may contain restrictions concerning the installation
of these units in bathrooms.
1.0IMPORTANTINSTALLATIONPOINTS
1.1 TheMultipointunvented water heater is factory fitted with two
Temperature/PressureRelief Valveswhichmust not be removed,blocked
or restricted in any way.
1.2 Expansion MUST be accommodatedwithin the system.The Multipoint
75/100incorporatesanexpansionvessel and check valve for this
purpose.
1.3 The Multipoint water heater must be installed by a competent installer in
accordancewithBuildingRegulationG3(Englandand Wales),Technical
StandardP3(Scotland) or Building RegulationP5(NorthernIreland).
FAILURETOPROVIDEADEQUATETEMPERATUREANDPRESSURE
RELIEFWILLINVALIDATEANYGUARANTEEAND LEADTOA
DANGEROUSINSTALLATION.
WARNING: IF WATER FLOWS FREELY FROMTHE PRESSURE
RELIEFVALVE ORTHETEMPERATURE/PRESSURERELIEF
VALVES,THE ELECTRICITYSUPPLYMUSTBE SWITCHED OFF
IMMEDIATELY. CONTACTTHEHEATRAESADIASERVICETEAM
(TEL:[phone])ORANAPPROVEDINSTALLER.

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3.0WALLMOUNTING
3.1 Fit the heater wall brackets to the rear of the unit using the bolts provided
(see Figure 2, step 1 below).
3.2 Using Figure 1 and the dimensions table as a guide mark the positions of
the fixing points. Drill and plug the wall with suitable fixings.
3.3 Fix the top two fixings first (Figure 2 step 2) followed by the bottom two
fixings (Figure 2, step 3).
NOTE:THEMULTIPOINTWATERHEATERIS HEAVY.PRIORTO
FIXTUREENSURETHEWALLISSTRONGENOUGHTOTAKETHE
WEIGHTOFTHE WATERHEATER WHEN FULL.
Figure 2: Fixture of brackets and wall mounting
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3

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4.0PLUMBING
4.1 To make installation of the Multipoint easier it is supplied with an integral
NonReturnValve,ExpansionVessel and Pressure Relief Valve.
4.2 Plumb the Multipoint water heater as shown below in Figure 3. Ensure
the Pressure Reducing Valve is installed in the correct orientation by
referencetothe direction of the flowarrowmarkedon it.
4.3 Thewater connections to the unitare15mmdiameter copper tubes
suitable for compression fittings. Do not use solder joints as this will
damagethe heater andmaypreventservicingunder warranty.
4.4 Inletand Outlet are marked accordingly.Severalhotoutletsvia
conventionaltapscanbeserved, however, individual sitedemandsshould
beconsideredwhen choosing capacity and thenumberof outlets.
4.5 It is recommended that a WRAS listed isolating valve (not supplied) is
fitted on the cold water supply to the heater before the Pressure
ReducingValve.
4.6 Plumbers Paste must not be used as it can impair the operation of the
valves.
Figure3: Plumbing Schematic
Multipoint 75 / 100
Water Heater
Temperature / Pressure
Relief Valves
Balanced
Cold Water
Draw Off
Pressure
Reducing
Valve
Service
Valve
Cold
Water
Mains
Hot
Tundish
To Drain
(Waste)

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5.0ELECTRICAL
WARNING:THISAPPLIANCE MUSTBE EARTHED.ITISSUITABLE
FORA.C. SUPPLYONLY.DISCONNECTTHEELECTRICALSUPPLY
BEFOREREMOVINGTHEBASECOVER. INSTALLATIONMUSTBEIN
ACCORDANCEWITHTHECURRENTI.E.E.REGULATIONS.
5.1 The unit is supplied fitted with a 2.0m 3 core 1.5mm2flexible cable (3kW
models) or 2.0m 3 core 4.0mm2flexible cable (6kW models). The
electicity supply should be fused at 13Amp for a 3kW model and 32
Amp for a 6kW model and be via a double pole isolating switch with a
contact separation of at least 3mm in both poles.
5.2 Thewiresare colour coded as follows:
GreenandYellow EARTH
Brown LIVE (L)
Blue NEUTRAL (N)
5.3 The Multipoint water heaters have two elements. Each element has its
own themostat and thermal cut out, refer to Figure 4 for wiring details.
5.4 The Cable Bush can be removed and conduit fitted to the plate the bush
is fitted to.
Figure4:Wiringdiagram
CUT-OUT ONE
THERMOSTAT TWO
THERMOSTAT ONE
CUT-OUT TWO
ELEMENT PLATE
TWO
ELEMENT PLATE
ONE
E
NL

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6.0DISCHARGE
Itisa requirement of BuildingRegulationG3that any discharge from an
unvented system is conveyed to where it is visible, but will not cause danger
to persons in or about the building.
G3REQUIREMENT
“...thereshall be precautions...to ensurethatthe hot water discharged from
safety devices is safely conveyed to where it is visible but will not cause
dangertopersons in or about the building.”
TheMultipont 75/100 includes apre plumbed discharge pipe(D1) from the
T&Pand ERV valvesto the tundish.
Thepre plumbed pipeterminates in a1/2" female threadedfitting which the
supplied tundish MUST be fitted to.
This ensures that the location of the tundish is visible, and in the same
space of the water heater as required by G3.
Dischargepipe (D2) fromthe tundish should beplumbed in accordancewith
section 3.9 of G3 which is reproduced in the following sections
G3GUIDANCESECTION3.9
Thedischargepipe (D2) from the tundish shouldterminateinasafe place
where there is no risk to persons in the vicinity of the discharge, preferably be
ofmetaland:
1 Be at least one pipe size larger than the nominal outlet size of the safety
device unless its total equivalent hydraulic resistance exceeds that of a
straightpipe9mlong i.e. discharge pipes between 9m and18mequivalent
resistance length should be at least two sizes larger than the nominal
outlet size of the safety device, between 18 and 27m at least 3 sizes
larger, and so on. Bends must be taken into account in calculating the
flowresistance. Refer toTable1on page10and the worked example.
2 Analternativeapproachforsizing discharge pipes would be to follow BS
6700:1987Specification for design installation,testingandmaintenanceof
servicessupplyingwater for domestic use within buildingsandtheir
curtilages,Appendix E, section E2 and table 21.
3 Havea vertical sectionof pipe at least300mm long, below thetundish
beforeanyelbowsorbendsin the pipework.
4 Be installed with a continuous fall.
5 Havedischargesvisibleat both the tundish and the finalpointofdischarge
but where this is not possible or is practically difficult there should be
clear visibility at one or other of these locations. Examples of acceptable
dischargearrangements are:
i Ideallybelowa fixed grating and above thewatersealina trapped gully.

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ii Downwarddischargesatlowlevel;i.e.upto100mmaboveexternal
surfaces such as car parks, hard standings, grassed areas etc. are
acceptableprovidingthatwherechildrenmay play or otherwise come into
contact with discharges a wire cage or similar guard is positioned to
preventcontact,whilst maintainingvisibility.
iii Dischargesat high level;e.g. into a metalhopper and metaldown pipe
withthe end of thedischargepipe clearly visible (tundishvisibleor not) or
ontoaroofcapableofwithstanding high temperature discharges of water
and 3m from any plastics guttering system that would collect such
discharges(tundishvisible).
iv Where a single pipe serves a number of discharges, such as in blocks of
flats, the number served should be limited to not more than 6 systems so
that any installation discharging can be traced reasonably easily. The
single common discharge pipe should be at least one pipe size larger
thanthelargestindividualdischargepipe(D2) to be connected. If
unventedhotwaterstoragesystemsareinstalledwheredischargesfrom
safety devices may not be apparent i.e. in dwellings occupied by blind,
infirmordisabledpeople,considerationshouldbe given to the installation
ofanelectronicallyoperateddevice to warn when discharge takes place.
NOTE:Thedischarge will consistof scalding water andsteam.Asphalt,
roofingfeltandnon-metallicrainwatergoodsmay be damaged by such
discharges.
WORKEDEXAMPLE OF DISCHARGEPIPESIZING:
Theexamplebelowis for a G1/2 temperature relief valve with a discharge
pipe(D2) having 4 No.elbows and length of7mfrom the tundishtothe point
ofdischarge.
FromTable1(overleaf):
•Maximumresistanceallowed for a straight length of22mmcopper
dischargepipe(D2)from a G1/2 temperature relief valve is9.0m.
•Subtract the resistance for 4 No. 22mm elbows at 0.8m each = 3.2m
•Thereforethepermittedlengthequatesto: 5.8m
•5.8m is less than the actual length of 7m therefore calculate the next
largest size.
•Maximumresistanceallowedfor a straight length of 28mmpipe(D2)from
aG1/2temperaturerelief valves equates to 18m.
•Subtract the resistance of 4 No. 28mm elbows at 1.0m each = 4.0m
Thereforethemaximumpermittedlengthequatesto:14m
•As the actual length is 7m, a 28mm (D2) copper pipe will be satisfactory.

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Fixed grating
Discharge below
fixed grating
(Building Regulation
G3 section 3.9d gives
alternative points
of discharge)
Trapped
gully
Discharge pipe (D2) from tundish,
with continuous fall. See Building
Regulation G3 section 3.9d i-iv,
Table 4 and worked example
300mm
minimum
500mm maximum
Metal discharge pipe (D1) from
Temperature relief valve to tundish
Tundish
Safety device
(e.g. Temperature
relief valve)
VALVE OUTLET
SIZE
MINIMUM SIZE OF
DISCHARGE PIPE D1
MINIMUM SIZE OF
DISCHARGE PIPE D2
FROM TUNDISH
MAXIMUM RESISTANCE
ALLOWED, EXPRESSED
AS A LENTGH OF
STRAIGHT PIPE (I.E. NO
ELBOWS OR BENDS
RESISTANCE CREATED BY
EACH ELBOW OR BEND
G 1/2 15MM 22mm
28mm
35mm
UP TO 9M
UP TO 18M
UP TO 27M
0.8M
1.0M
1.4M
G 3/4 22MM 28mm
35mm
42mm
UP TO 9M
UP TO 18M
UP TO 27M
1.0M
1.4M
1.7M
G 1 28MM 35mm
42mm
54mm
UP TO 9M
UP TO 18M
UP TO 27M
1.4M
1.7M
2.3M
Table1.Sizingofcopperdischargepipe(D2)forcommonT&Preliefvalve
sizes.
Figure5.Schematicdischargepipearrangement.

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7.0COMMISSIONING
7.1 Do not switch on the electrical supply until the Multipoint has been filled
with water and checked for leaks.
7.2 Check that all installation,electrical and discharge piperequirements
havebeenmet.
7.3 Check that all water and electrical connections are tight.
7.4 Open a hot water tap, turn on mains water supply to the Multipoint.
7.5 Allow Multipoint to fill and leave hot tap running for a short while to purge
any air and flush out the pipework. Close the hot tap and check the
system for leaks.
7.6 Manually test the operation oftheTemperature/PressureReliefValves
andthePressure(expansion)ReliefValve.Ensurewaterflowsfreelyfrom
thevalvesand through the discharge pipes.
7.7 Switch on the electrical supply.The indicator lights will illuminate during
heating. When the set temperature is reached the indicator lights will go
out.
7.8 The set temperature can be adjusted by rotating the thermostat controls
located inside the terminal cover. It is recommeded that both thermostats
areset at position 6(approximatley60°C) howeverthey can be adjusted
between settings 1 to 7 (5°C to 75°C). In hard water areas it is advised
that the maximum temperature is restricted to prevent build up of scale.
8.0MAINTENANCE
Littlemaintenanceisrequired,however in hard water areas the unit will
requireperiodicdescalingto ensure efficientoperation.To descale the unit:
8.1 Switch off and disconnect the electrical supply. Turn off the water supply
to the unit.
8.2 Open a hot tap to relieve any system pressure.
8.3 Remove the terminalcoverbyremoving the fivesupportingscrewsholding
it in place.
8.4Drainwater by opening internaldraincocks.
8.5 Unclip the expansion vessel retaining clip and locate the expansion
vessel into the nest detail at the front on the right (see Figure 6 overleaf).
8.6 Disconnect the electrical terminals to the element and the earth link to
the earthing stud. Withdraw the thermostat and thermal cut-out capillary
tubes from the pockets on the element plate.
8.7 Removetheelementplateassembly by unscrewing the five securing
screws.Tappedjacking holes are provided (NOTE: a quantity of water
may still be present in the container, it is recommended that a container
be placed under the unit to collect any spillage).

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TheTemperature/PressureReliefValvesand thePressure(Expansion)
ReliefValveshould be regularly checked.Tocheck the valves:
8.12Manuallyoperatethevalves by twisting the cap. Ensure waterflows
freelyfromthevalves and through the discharge pipes(NOTE:thewater
dischargedmaybeveryhot).Ensurethevalvesreseat correctly when
released.
8.13CleanthestrainerincorporatedinthePressureReducingValve.
To inspect and clean the strainer turn off the mains water supply to the
heater and open a hot tap to relieve the system pressure. Unscrew the
blackcapfromthePressureReducingValveandremove.Thestrainer
will be removed with the cap. Wash any particulate matter from the
strainerundercleanrunningwater. Replace the cap assembly ensuring
the sealing ring is correctly fitted. Do not use any other type of sealant.
Close hot tap, open mains stop cock and check for leaks.
TheExpansionVesselshouldhave a precharge pressure of 3.5 bar (51p.s.i.).
Thiscanreduceovertimeandeventuallyrequire re-charging.Todothis:
8.14 Turn off water supply to the unit; open a hot tap to relieve system
pressure.
8.15 Switch off and disconnect electrical supply to water heater.
8.16Remove the terminalcoverbyremovingthefive supporting screws
holding it in place.
Figure6. Removal of expansionvesselformaintenancepuproses.
8.8 Removeanyloose scale from the container. Carefully clean offany
scale from the element and thermostat pocket. DO NOT clean scale
frominteriorcontainerwalls.
8.9 Re-assemble the element plate assembly fitting a new sealing gasket.
RewiretheunitwithreferencetoFigure4(wiringdiagram).
8.10 Repeat this for both element plate assemblies.
8.11 Re-commission theunitfollowingthe INSTALLATIONand
COMMISSIONINGinstructions.

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8.17Remove dust cap fromtop of Expansion Vessel.
8.18Checkpre-chargepressureusingatyre pressure gauge. If the pressure
is lower than 3.5 bar (51 p.s.i.) it should be recharged using a tyre pump
(SchraederValvetype).DONOTOVERCHARGE.
8.19Re-checkpressure and when correct replacedustcap.
8.20 Turn on mains water supply and close hot tap.
9.0FAULTFINDING
Disconnecttheelectricalsupply before removing the terminal cover.It is
recommendedthatanyserviceoperationsontheMultipointheaterarecarried
out by a competent person.
FAULT POSSIBLE CAUSES ACTION
Water not heating Electrical supply fault Check electrical supply
Thermal cut out tripped Check cut outs. If they have
operated then reset them.
If necessary replace them.
Check thermostats and if
necessary replace them.
Thermostat setting too Check thermostat setting.
low or faulty. Replace if necessary.
Discharge of water from Excessive mains water Check pressure from
pressure relief valve pressure Pressure reducing valve.
(continuously). Replace if greater than
3.5 bar (51psi)
Expansion relief valve Replace expansion relief
fault valve.
Discharge of water from Loss of pressure from Check and if necessary
pressure relief valve Expansion vessel re charge expansion vessel
(intermittently). pre charge pressure.
Discharge of water from Thermostat and Replace thermostats and
Temperature/Pressure thermal cut out fault thermal cut outs
relief valve and/or
water/steam from
pressure relief valve
No water flow Product incorrectly Check inlet and outlet
Installed connections are correct.
Check valves are installed
in accordance with flow
direction arrows.
Mains water supply Check mains water supply
not turned on. is turned on.
Blockage in main water Check mains water supply
supply for obstructions.
Check Expansion relief valve.
"Milky water" Oxygenated water Water from a pressurised
system releases oxygen
bubbles when flowing.The
milkiness will disapear
after a short while.

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10.0SPARE PARTS
Thefollowingcomprehensivelistof spare parts is available for your Multipoint
waterheater. Please refertotheRating Label on the sideofyour heater
beforeorderingtoensurethe correct spare part is obtained.
DONOTREPLACEWITHPARTSNOTRECOMMENDEDBYHEATRAE
SADIA.THISWILLINVALIDATEYOURGUARANTEEANDMAYRENDER
THEINSTALLATIONDANGEROUS.
1.Temperature/PressureReliefValve ............ 95 605 045
2. Expansion Vessel ..................................... 95 607 045
3. Fixing Bracket (75 Litre) ............................ 95607046
3. Fixing Bracket (100 Litre) .......................... 95607047
4.Thermostat................................................ 95612 019
5.Thermal Cut-Out........................................ 95612 020
6. Element Plate Assembly - 3kW ............... 95606926
6. Element Plate Assembly - 1.5 kW ........... 95 606960
7. Fixing Bracket Bolts (pack of 6) ................ 95 607050
8.TerminalCoverScrews(packof 5)............. 95607051
9. Flexible hose ............................................ 95607049
2-View3
1
2
3
4
5
6
11
10
9
12
13
7
8
14

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10.IndicatorLight.......................................... 95607 048
11.Pressure (Expansion)Relief Valve ........... 95 607 986
12.CheckValve ............................................ 95607 987
13. Gasket (pack of 10)................................. 95611811
14.TerminalCover......................................... 95614086
15.Pressure Reducing Valve......................... 95 607 989
11.0ACCESSORIES
Theheatercanbeusedtosupplyseveralhotwateroutletsviaconventional
taps.Individualsitedemandsshouldbe considered when choosing capacity
andthenumber of outlets to be served.
AThermostatic Blending Valve can be used in conjunction with the Multipoint
WaterHeater. Heatrae Sadia supply bothTMV2 approved (Pack U3, code
number95970 354) and TMV3 approved(PackU795970360)Thermostatic
BlendingValves.
12.0USERINSTRUCTIONS
12.1 Thetemperaturecan be adjusted by rotatingthethermostatcontrols
locatedinside the terminal cover. It is recommendedthatboth
thermostatsareset at position 6(approximately60°C) howeverthey
canbe adjusted between settings1to 7 (5°Cto 75°C).In hard water
areas it is advised that the maximum temperature is restricted to
preventbuildup of scale.Toavoidriskoffreezing when the heater isnot
in use for long periods during the winter months, do not switch off the
electrical supply and set the thermostat to its minimum position. N.B.
This will not protect other system pipework.
12.2 The indicator lights will be illuminated when the unit is heating.
12.3 To ensure the heater continues to operate at its optimum performance it
shouldbe periodically maintained inaccordancewith the instructions
givenunder thesectionheaded MAINTENANCE.
12.4IMPORTANTNOTESTOUSER
DONOTBLOCK ORRESTRICTTHEDISCHARGEFROMANY
SAFETYVALVE FITTED.
DONOTTAMPER WITHANYSAFETYVALVE FITTED.
IFWATER DISCHARGES FROMANYSAFETYVALVE FITTED
SWITCHOFFTHE ELECTRICALSUPPLYTOTHEUNIT
IMMEDIATELY.CONTACTTHEHEATRAE SADIASERVICETEAM
(TEL:[phone])ORANAPPROVED INSTALLER.DONOTTURN
THEELECTRICALSUPPLYONAGAINUNTILTHEUNITHASBEEN
CHECKEDANDAPPROVED BYAQUALIFIED INSTALLER.

16 36005917 issue 2
Spares Stockists
For the fast and efficient supply of spares please contact the stockists listed
below:
Electric Water Heating Co.
2 Horsecroft Place, Pinnacles, Harlow, CM19 5BT.
Tel: [phone]
E-mail: [email protected]
Eyre & Elliston
Unit 12, Spitfire Way, Airlinks Industrial Estate
Heston, Middlesex TW5 9NR
Tel: [phone]
PartsCenter
Network 65 Business Park, Bentley Wood Way, Burnley, Lancashire, BB11 5ST.
Tel: [phone]
www.partscenter.co.uk
Newey & Eyre Specialists Products Division
Please contact your local branch
UK Spares Ltd.
Tower Lane, Warmley, Bristol BS30 8XT
Tel: [phone]
William Wilson Ltd.
Unit 3A, 780 South Street, Whiteinch, Glasgow, G14 0SY
Tel: [phone]
Heatrae Sadia Heating
Hurricane Way Norwich NR6 6EA
www.heatraesadia.com
Main No: 01603 420100
Main Fax: [phone]
Sales: 01603 420110
Sales Fax: [phone]
Service: 01603 420330
Service Fax: [phone]