Heatrae Sadia MULTIPOINT 10 Guida

MULTIPOINT

Installation and User Instructions

for the

MULTIPOINT

10 and 15 litre Unvented Water

Heaters

HEATRAE SADIAHEATRAE SADIA

HEATRAE SADIA

The quality name in water heating

Please read and understand these instructions before starting

work.

Please leave this leaflet with the user following installation

36 00 5718 Issue 4

Please read and understand these instructions prior to installing your Multipoint

unvented water heater. Particular attention should be paid to the section headed

IMPORTANT INSTALLATION POINTS. Following installation and commission-

ing the operation of the heater should be explained to the customer and these instruc-

tions left with them for future reference.

TECHNICAL SPECIFICATIONS

Electrical rating ................................................... 2.75/3kW 230/240V

or .................................................................... 4.1/4.5kW 230/240V

Capacities ............................................................ 10 or 15 litres

Weight (full) ........................................................ 10 litre - 16.9kg

............................................................................. 15 litre - 23.8kg

Rated pressure ..................................................... 6 bar

Minimum recommended supply pressure ........... 0.8 bar

Temperature/Pressure Relief Valve ..................... 90oC/7 bar

1.0 IMPORTANT INSTALLATION POINTS

1.1 The Multipoint unvented water heater MUST be fitted with a Pressure Relief

Valve. The factory fitted Temperature/Pressure Relief Valve can fulfill this

function. FAILURE TO PROVIDE ADEQUATE PRESSURE RELIEF

WILL INVALIDATE ANY GUARANTEE AND LEAD TO A DANGEROUS

INSTALLATION

1.2 Expansion can take place within the cold water supply PROVIDED THAT

BOTH :

(a) Backflow in the main is not prevented by any stopvalve with loose jumper,

check valve, pressure reducing valve or similar, AND

(b) Hot water expansion does not enter a branch to a cold water outlet (see

Diagram 1 for expansion pipe lengths).

N.B. Both the above conditions must be met. Additionally expansion within

the cold water supply will not be possible if the static supply pressure exceeds

4.1 bar (60p.s.i.).

1.3 If any of the conditions in 1.2 above cannot be met expansion must be

accomodated using an Expansion Vessel. To ensure all expansion takes place in

the vessel a Check Valve must also be fitted together with a Pressure (expansion)

Relief Valve (see Diagram 2). Use Accessory Pack U2 code no. 95 970 351.

1.4 If the static supply pressure exceeds 4.1 bar (60p.s.i.) a Pressure Reducing Valve

must be fitted to the cold main supply. If a Pressure Reducing Valve is used an

Expansion Vessel must also be used (see Diagram 3). Use Accesory Packs U1 and

U2 code no.’s 95 970 352 and 95 970 351.

MULTIPOINT

Diagram 1 For inlet pressures up to 4.1 bar (60 p.s.i.)

Diagram 2 For inlet pressures up to 4.1 bar (60 p.s.i.) where expansion

in main supply is not possible

Diagram 3 For inlet water pressures above 4.1 bar (60 p.s.i.)

WARNING: IF WATER FLOWS FROM THE PRESSURE RELIEF

VALVE OR TEMPERATURE/PRESSURE RELIEF VALVE THE

ELECTRICITY SUPPLY MUST BE SWITCHED OFF IMMEDI-

ATELY. CONTACT THE HEATRAE SADIA SERVICE TEAM

(Tel: 01603 420330) OR AN APPROVED INSTALLER.

2.0 INSTALLATION - GENERAL REQUIREMENTS:

2.1 National Wiring rules may contain restrictions concerning the installation of

these units in bathrooms.

2.2 The unit should be vertically wall mounted using the wall bracket supplied. The

water connections must always be to the top of the unit.

2.3 Enough space should be left at the top above the unit for pipe connections and

access to the Temperature/Pressure Relief Valve. Refer to Diagram 4 and the

Dimensions Table to determine a suitable position for the heater.

2.4 NOTE: Ensure that the wall can support the full weight of the unit (see TECHNI-

CAL SPECIFICATIONS) and that there are no hidden services (electricity, gas,

or water) below the surface of the wall.

2.5 DO NOT install where the unit may freeze.

2.6 Refer to the section IMPORTANT INSTALLATION POINTS to determine which

valves and accessories are required. Plumb in the valves in the sequence shown in

the relevant Diagrams 1 to 3.

2.7 The water connections are 15mm diameter copper tubes suitable for compression

fittings. Do not use solder joints as this will damage the heater and may prevent

servicing under warranty.

2.8 The INLET is marked BLUE, the OUTLET is marked RED. The WBS Listed

isolating valve (supplied) must be fitted on the cold water supply to the heater.

Several hot outlets can be served.

2.9 Plumbers Paste must not be used as it can impair the operation of the valves.

15 Litre10 LitreDim e n s io n

613457A

728572B

656500C

506350D

Diagram 4

MULTIPOINT

3.0 INSTALLATION -

ELECTRICAL REQUIREMENTS

WARNING: This appliance must be earthed. It is suitable for a.c.

supply only. Disconnect the electrical supply before removing the

terminal cover. Installation must be in accordance with the current

I.E.E. Wiring Regulations.

3.1 The unit is supplied fitted with a 0.75m 3 core 1.5mm2flexible

cable on the 3kW model or a 0.75m 3 core 2.5mm2 cable on the

4.5kW model. The electicity supply should be fused 13 Amp for a

3kW model and 20 Amp for a 4.5kW model and be via a double

pole isolating switch with a contact separation of at least 3mm in

both poles. Refer to the schematic wiring diagrams below.

3.2 The wires are colour coded as follows:

Green and Yellow EARTH ( )

Brown LIVE (L)

Blue NEUTRAL (N)

NEON

ELEMENT

('Stat/Cut-out plugs

directly onto element

terminations)

COMBINED

THERMOSTAT

AND THERMAL

CUT-OUT

RESET

BUTTON

EARTH

POST

Wiring Diagram

3kW models

Wiring Diagram

4.5kW models

4.0 INSTALLATION -

DISCHARGE PIPE REQUIREMENTS

4.1 The discharge outlet from the Pressure (expansion) Relief Valve and the Tem-

perature/Pressure relief Valve must be connected to a discharge pipe. It is recom-

mended that the tundish supplied be installed in the discharge pipe to give a

visible indication that the valves are operating.

4.2 The discharge pipe must fall continuously from the valve outlets and be unob-

structed.

4.3 The pipe from the valves to the tundish should be 15mm o/dia minimum. From

the tundish to the point of discharge the pipe should be 22mm o/dia minimum

and have a resistance to flow equivalent to 9 metres of straight pipe. Long

discharge pipe runs should have an increased internal diameter.

4.4 The pipe material should be capable of conveying water/steam at 100oC.

4.5 The final discharge point should be in a safe, visible position.

5.0 COMMISSIONING

5.1 Do not switch on the electrical supply until the unit has been filled with water

and checked for leaks.

5.2 Check that all installation, electrical and discharge pipe requirements have been

met.

5.3 Check that all water and electrical connections are tight.

5.4 Open a hot water tap, turn on mains water supply to the heater.

5.5 Allow unit 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.

5.6 Manually test the operation of the Temperature/Pressure Relief Valve and, if

fitted, the Pressure (expansion) Relief Valve. Ensure water flows freely from the

valve(s) and through the discharge pipes.

5.7 Switch on the electrical supply. The indicator light will illuminate during

heating. When the set temperature is reached the indicator light will go out.

5.8 The set temperature can be adjusted by rotating the knob located in the terminal

cover. It is possible to lock the thermostat knob in either the mid-range or a “hot”

position by following the procedures in 5.9 or 5.10 below. Always switch off the

electrical supply before removing the terminal cover.

5.9 Setting the “mid-range” position:

Rotate the thermosatat knob to the mid postion. Remove the terminal cover by

using a large flat bladed screwdriver to depress the three snap lugs located in the

three top rectangular depressions. Holding the thermostat knob in position turn

the terminal cover over and remove the backing disc from the underside of the

MULTIPOINT

cover. Turn the backing disc over and refit to the knob ensuring the

notch locates with the boss on the underside of the cover. Refit the

terminal cover, the thermostat will now be locked in the “mid-

range” position.

5.10 Setting the “hot” position:

Rotate the thermostat knob to mid way through the hot graduated

range (red graphic). Follow the procedure detailed above, however

in this case the knob should be held in the “hot” position previously

set. When the terminal cover has been refitted the thermostat will be

locked in the “hot” position. This position is recommended when

using the heater in conjunction with a thermostatic blending valve.

6.0 MAINTENANCE - DESCALING

Little maintenance is required, however in hard water areas the unit will

require periodic descaling to ensure efficient operation. To descale the

unit:

6.1 Switch off and disconnect the electrical supply. Turn off the water

supply to the unit.

6.2 Open a hot tap to relieve any system pressure. Disconnect the

plumbing connections to the unit and remove from the wall bracket

(note full weights of units). Empty unit through the outlet connec-

tion.

6.3 Remove the terminal cover by using a large flat bladed screwdriver to

depress the 3 snap lugs located in the top 3 rectangular depressions.

6.4 Remove the plastic disc from the thermostat spindle. Remove the

insulating pad from the terminal housing. Disconnect the electrical

terminations to the thermostat. Disconnect earth links to the earthing

stud.

6.5 Remove the element plate assembly by unscrewing the five securing

screws, a tapped jacking point is provided. Remove any loose scale

from the container. Carefully clean off any scale from the element and

thermostat pocket. DO NOT clean scale from interior container walls.

6.6 Re-assemble the element plate assembly fitting a new sealing gasket.

Note the correct orientation of the element plate by reference to

Diagram 5 overleaf. Rewire the unit with reference to the Wiring

Diagrams. Refit the insulating pad and plastic disc to ensure the

correct operation of the thermostat.

6.7 Re-commission the unit following the INSTALLATION and COM-

MISSIONING instructions.

7.0 MAINTENANCE - SAFETY VALVES

The Temperature/Pressure Relief Valve and, if fitted, the Pressure (expansion) Relief

Valve should be regularly checked. Manually operate the valves by either twisting the

cap or lifting the lever. Ensure water flows freely from the valve(s) and through the

discharge pipes. Ensure the valve(s) reseat correctly when released.

8.0 MAINTENANCE -

EXPANSION VESSEL PRECHARGE PRESSURE

The Expansion Vessel, if fitted, should have a precharge pressure of 4.1 bar (60

p.s.i.). This can reduce over time and eventually require re-charging. To do this:

8.1 Turn off water supply to the unit; open a hot tap to relieve system pressure.

8.2 Remove dust cap from top of Expansion Vessel

8.3 Check pre-charge pressure using a tyre pressure gauge. If the pressure is lower

than 4.1 bar (60 p.s.i.) it should be recharged using a tyre pump (Schraeder Valve

type). DO NOT OVER CHARGE.

8.4 Re-check pressure and when correct replace dust cap.

8.5 Turn on mains water supply and close hot tap.

Diagram 5 Correct orientation of element plate (viewed from top of unit)

3kW models

4.5kW models

MULTIPOINT

9.0 SPARE PARTS

The following comprehensive list of spare parts is available for your

Multipoint water heater. Please refer to the Rating Label on the side of

your heater before ordering to ensure the correct spare part is obtained.

DO NOT REPLACEWITH PARTS NOTRECOMMENDED BY

HEATRAE SADIA- THIS WILLINVALIDATEYOUR GUARANTEEAND

MAY RENDER THE INSTALLATION DANGEROUS.

DESCRIPTION CODE NO.

Element plate assembly - 10 litre 3kW .................. 95606 921

Element plate assembly - 15 litre 3kW .................. 95 606 922

Element plate assembly - 10 litre 4.5kW ............... 95 606 923

Element plate assembly - 15 litre 4.5kW ............... 95 606 924

Combined thermostat/thermal cut-out 3kW ......... 95 612 633

Combined thermostat/thermal cut-out 4.5kW ...... 95 612 634

Indicator light 3kW .............................................. 95 607 992

Indicator light 4.5kW ........................................... 95 607 993

Element plate gasket ............................................ 95 611 811

Pressure (expansion) Relief Valve ........................ 95 607 986

Temperature/Pressure Relief Valve ....................... 95 905 045

Check Valve .......................................................... 95 607 987

Expansion Vessel ................................................. 95 607 988

Pressure Reducing Valve ..................................... 95 607 989

Top cover moulding ............................................. 95 614 181

Terminal cover c/w thermostat knob .................... 95 614 182

10.0 FAULT FINDING

Disconnect the electrical supply before removing the terminal cover. It is recom-

mended that any service operations on the Multipoint heater are carried out by a

competent person.

NOTE: Use only Heatrae Sadia approved spare parts. Replacement of any parts with

components not recommended by Heatrae Sadia will invalidate the guarantee and

may render the installation dangerous.

ACTIONPOSSIBLE CAUSESFAULT

1. Check electrical supply1. Electrical supply faultWater not heating

WiringDiagram)

replace thermostat/thermal cut-out (see

check thermostat operation. If necessary

2. Check cut-out, if operated reset and2. Thermal cut-out tripped

necessary

3. Check thermostat operation, replace if3. Thermos tat fault

POINTS)

U2 (see IMPORTANT INSTALLATION

Fit Pressure Reducing Valve Pack U1 and

pressure

Exc es s iv e main s wa ter

(continuously)

Pressure Relief Valve

Dis charge of water from

INSTALLATION POINTS)

1. Fit Pack U2 (see IMPORTANT

possible

1. Expansion in mains not

(intermittently)

Pres ure Relief Valv e

Dis charge of water from

2. Fit Packs U1 and U2

4.1 bar (60 p.s .i.)

2. Mains pressure exceeds

3. Fit Pack U2 when us ing Pack U1

Pack U2

3. Pack U1 fitted without

4. Rep lace Pres s ure Relief Valv e4. Pressure Relief Valve Fault

(see Section 8.0)

Expansion Vessel pre-charge pressure

5. Check and, if necessary, re-charge

Expansion Vessel

5. Loss of press ure from

Replace thermostat and thermal cut-out

cut-out fault

Thermostat and thermal

Pressure Relief Valve

water/s team from

Relief Valve and or

Temperature/Pressure

Dis charge of water from

in accordance with flow direction arrows

1. Check all valves are correctly installed

fitted

1. Inlet valves incorrectly

o water flow

2. Check mains water supply is on

turned on

2. Mains water supply not

fitted check the strainer is not blocked

3. Check for obstructions. If Pack U1 is

supply

3. Blockage in mains water

while.

milkiness will disappear after a short

oxygen bubbles when flowing. The

Water froma pressurised systemreleasesOxygenated water"Milky" water

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