Heatrae Sadia MULTIPOINT 75 User manual

1
MULTIPOINT 75 / 100
Fitting Instructions and User Guide

32
INTRODUCTION
Thank you for purchasing a Heatrae Sadia Multipoint 75 / 100 unvented
water heater. The Multipoint water heater is manufactured in the UK to the
highest standards and has been designed to meet all the latest relevant
safety specications.
To make installation quicker and easier the Multipoint 75 / 100 water
heaters incorporate an internal check valve, Expansion relief valve,
expansion vessel and factory tted temperature / pressure relief valves.
Please read and understand these instructions before installing your
Multipoint water heater. Particular attention should be paid to the section
headed IMPORTANT INSTALLATION POINTS.
The Multipoint unit must be installed and commissioned by a competent person.
Please read and understand these instructions before installing the Multipoint
unit. Following installation and commissioning, the operation of the Multipoint
unit should be explained to the user and these instructions left with them for
future reference.
The Multipoint unit is not intended for use by persons (including children) with
reduced physical, sensory or mental capabilities, or lack of experience and
knowledge, unless they have been given supervision or instruction concerning
the use of the appliance by a person responsible for their safety.
Children should be supervised to ensure they do not play with the Multipoint
unit.
The Multipoint unit does not contain any substances harmful to health; it does
not contain any asbestos.
TECHNICAL SPECIFICATIONS
Electrical Rating 3.0kW @ 240v / 2.8kW @ 230v
6.0kW @ 240v / 5.5kW @ 230v
Capacity 75 and 100 litres
Weight (100 Litre) 50Kg (empty), 160Kg (full)
Weight (75 Litre) 38Kg (empty), 123Kg (full)
Operating pressure 0.35 MPa (3.5 bar)
Rated pressure 0.6 MPa (6.0 bar)
Expansion vessel charge pressure 0.35 MPa (3.5 bar)
Expansion relief valve setting 0.6 MPa (6.0 bar)
Minimum supply pressure 0.08 MPa (0.8 bar)
Maximum supply pressure to PRV 1.6 MPa (16.0 bar)
Temperature / Pressure Relief Valve 90°C / 0.7 MPa (7.0 bar) Figure1: Multipoint Water Heater - Dimensions and Important Features
PERFORMANCE
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
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)
1.13
1.13
100 litre 3kW 120 1.27
100 litre 6kW 60 1.27

54
2.0 GENERAL REQUIREMENTS:
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 Enough space should be left below the unit for pipe connections and
above the unit for access to the Temperature/Pressure Relief Valves
(400 mm minimum). Refer to Figure 1 and the Dimensions Table to
determine a suitable position for the heater.
2.3 Ensure that the wall can support the full weight of the unit and that there
are no hidden services (electricity, gas or water) below the surface of
the wall.
2.4 DO NOT install where the unit may freeze.
2.5 National Wiring Rules may contain restrictions concerning the
installation of these units in bathrooms.
1.0 IMPORTANT INSTALLATION POINTS
1.1 The Multipoint unvented water heater is factory tted with two
Temperature/Pressure Relief Valves which must not be removed,
blocked or restricted in any way.
1.2 Expansion MUST be accommodated within the system. The Multipoint
75/100 incorporates an expansion vessel and check valve for this
purpose.
1.3 The Multipoint water heater must be installed by a competent installer
in accordance with Building Regulation G3 (England and Wales),
Technical Standard P3 (Scotland) or Building Regulation P5 (Northern
Ireland).
FAILURE TO PROVIDE ADEQUATE TEMPERATURE AND
PRESSURE RELIEF WILL INVALIDATE ANY GUARANTEE AND
LEAD TO A DANGEROUS INSTALLATION.
WARNING: IF WATER FLOWS FREELY FROM THE PRESSURE
RELIEF VALVE OR THE TEMPERATURE/PRESSURE RELIEF
VALVES, THE ELECTRICITY SUPPLY MUST BE SWITCHED OFF
IMMEDIATELY. CONTACT THE HEATRAE SADIA SERVICE TEAM
3.0 WALL MOUNTING
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 xing points. Drill and plug the wall with suitable xings.
3.3 Fix the top two xings rst (Figure 2 step 2) followed by the bottom two
xings (Figure 2, step 3).
NOTE: THE MULTIPOINT WATER HEATER IS HEAVY. PRIOR TO
FIXTURE ENSURE THE WALL IS STRONG ENOUGH TO TAKE THE
WEIGHT OF THE WATER HEATER WHEN FULL.
Figure 2: Fixture of brackets and wall mounting
12
3
COMPONENT CHECKLIST
Before commencing installation please check that the following
components have been supplied in the Installation Kit:
• Combined pressure reducing valve and strainer (x1)
• Tundish (x1)
• Mounting brackets (x2)
• Mounting bracket xing bolts (x6)

76
5.0 ELECTRICAL
WARNING: THIS APPLIANCE MUST BE EARTHED. IT IS SUITABLE
FOR A.C. SUPPLY ONLY. DISCONNECT THE ELECTRICAL SUPPLY
BEFORE REMOVING THE BASE COVER. INSTALLATION MUST BE
IN ACCORDANCE WITH THE CURRENT I.E.E. REGULATIONS.
5.1 The unit is supplied tted with a 2.0m 3 core 1.5mm2 exible cable
(3kW models) or 2.0m 3 core 4.0mm2 exible cable (6kW models). The
electicity supply should be fused at 13 Amp 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 The wires are colour coded as follows:
Green and Yellow 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 tted to the plate the
bush is tted to.
4.0 PLUMBING
4.1 To make installation of the Multipoint easier it is supplied with an
integral Non Return Valve, Expansion Vessel 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
reference to the direction of the ow arrow marked on it.
4.3 The water connections to the unit are 15mm diameter copper tubes
suitable for compression ttings. Do not use solder joints as this will
damage the heater and may prevent servicing under warranty.
4.4 Inlet and Outlet are marked accordingly. Several hot outlets via
conventional taps can be served, however, individual site demands
should be considered when choosing capacity and the number of
outlets.
4.5 It is recommended that a WRAS listed isolating valve (not supplied)
is tted on the cold water supply to the heater before the Pressure
Reducing Valve.
Figure 3: Plumbing Schematic
Figure 4: Wiring diagram
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)
CUT-OUT ONE
THERMOSTAT TWO
THERMOSTAT ONE
CUT-OUT TWO
ELEMENT PLATE
TWO
ELEMENT PLATE
ONE
E
NL

98
6.0 DISCHARGE
It is a requirement of Building Regulation G3 that 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.
G3 REQUIREMENT
“...there shall be precautions...to ensure that the hot water discharged from
safety devices is safely conveyed to where it is visible but will not cause
danger to persons in or about the building.”
The Multipont 75/100 includes a pre plumbed discharge pipe (D1) from the
T&P and ERV valves to the tundish.
The pre plumbed pipe terminates in a 1/2” female threaded tting which the
supplied tundish MUST be tted to.
This ensures that the location of the tundish is visible, and in the same
space of the water heater as required by G3.
This pipe must be left open to atmosphere and water may drip from the
valve.
Discharge pipe (D2) from the tundish should be plumbed in accordance
with section 3.9 of G3 which is reproduced in the following sections
G3 GUIDANCE SECTION 3.9
The discharge pipe (D2) from the tundish should terminate in a safe place
where there is no risk to persons in the vicinity of the discharge, preferably
be of metal and:
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 straight pipe 9m long i.e. discharge pipes between 9m and 18m
equivalent 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 ow resistance. Refer to Table 1 on page 10 and the worked
example.
2 An alternative approach for sizing discharge pipes would be to follow BS
6700:1987 Specication for design installation, testing and maintenance
of services supplying water for domestic use within buildings and their
curtilages, Appendix E, section E2 and table 21.
3 Have a vertical section of pipe at least 300mm long, below the tundish
before any elbows or bends in the pipework.
4 Be installed with a continuous fall and in a frost free enviroment.
5 Have discharges visible at both the tundish and the nal point of
discharge but where this is not possible or is practically difcult there
should be clear visibility at one or other of these locations. Examples of
acceptable discharge arrangements are:
i Ideally below a xed grating and above the water seal in a trapped gully.
ii Downward discharges at low level; i.e. up to 100mm above external
surfaces such as car parks, hard standings, grassed areas etc. are
acceptable providing that where children may play or otherwise come
into contact with discharges a wire cage or similar guard is positioned to
prevent contact, whilst maintaining visibility.
iii Discharges at high level; e.g. into a metal hopper and metal down pipe
with the end of the discharge pipe clearly visible (tundish visible or not)
or onto a roof capable of withstanding high temperature discharges of
water and 3m from any plastics guttering system that would collect such
discharges (tundish visible).
iv Where a single pipe serves a number of discharges, such as in blocks
of ats, 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 than the largest individual discharge pipe (D2) to be connected.
If unvented hot water storage systems are installed where discharges
from safety devices may not be apparent i.e. in dwellings occupied by
blind, inrm or disabled people, consideration should be given to the
installation of an electronically operated device to warn when discharge
takes place.
NOTE:The discharge will consist of scalding water and steam. Asphalt,
roong felt and non-metallic rainwater goods may be damaged by such
discharges.
WORKED EXAMPLE OF DISCHARGE PIPE SIZING:
The example below is for a G1/2 temperature relief valve with a discharge
pipe (D2) having 4 No. elbows and length of 7m from the tundish to the
point of discharge.
From Table 1 (overleaf):
• Maximum resistance allowed for a straight length of 22mm copper dis-
charge pipe (D2) from a G1/2 temperature relief valve is 9.0m.
• Subtract the resistance for 4 No. 22mm elbows at 0.8m each = 3.2m
• Therefore the permitted length equates to: 5.8m
• 5.8m is less than the actual length of 7m therefore calculate the next
largest size.
• Maximum resistance allowed for a straight length of 28mm pipe (D2)
from a G1/2 temperature relief valves equates to 18m.
• Subtract the resistance of 4 No. 28mm elbows at 1.0m each = 4.0m
Therefore the maximum permitted length equates to: 14m
• As the actual length is 7m, a 28mm (D2) copper pipe will be satisfactory.

1110
7.0 COMMISSIONING
7.1 Do not switch on the electrical supply until the Multipoint has been lled
with water and checked for leaks.
7.2 Check that all installation, electrical and discharge pipe requirements
have been met.
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 ll and leave hot tap running for a short while to
purge any air and ush out the pipework. Close the hot tap and check
the system for leaks.
7.6 Manually test the operation of the Temperature/Pressure Relief Valves
and the Pressure (expansion) Relief Valve. Ensure water ows freely
from the valves and 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 are set at position 6 (approximatley 60°C) however they
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.
8.0 MAINTENANCE
Little maintenance is required, however in hard water areas the unit will
require periodic descaling to ensure efcient operation. 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 terminal cover by removing the ve supporting screws
holding it in place.
8.4 Drain water by opening internal drain cocks.
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 Remove the element plate assembly by unscrewing the ve securing
screws. Tapped jacking 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).
Table 1. Sizing of copper discharge pipe (D2) for common T&P relief valve
sizes.
Figure 5. Schematic discharge pipe arrangement.
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
Fixed grating
Discharge below
(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)

1312
The Temperature/Pressure Relief Valves and the Pressure (Expansion
Relief Valve should be regularly operated to remove lime deposits and
varify that it is not blocked.
8.12 Manually operate the valves by twisting the cap. Ensure water ows
freely from the valves and through the discharge pipes (NOTE: the
water discharged may be very hot). Ensure the valves reseat correctly
when released.
8.13 Clean the strainer incorporated in the Pressure Reducing Valve.
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
black cap from the Pressure Reducing Valve and remove. The strainer
will be removed with the cap. Wash any particulate matter from
the strainer under clean running water. Replace the cap assembly
ensuring the sealing ring is correctly tted. Do not use any other type
of sealant. Close hot tap, open mains stop cock and check for leaks.
The Expansion Vessel should have a precharge pressure of 3.5 bar
(51p.s.i.).
This can reduce over time and eventually require re-charging. To do
this:
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.
8.16 Remove the terminal cover by removing the ve supporting screws
holding it in place.
8.17 Remove dust cap from top of Expansion Vessel.
8.18 Check pre-charge pressure using a tyre pressure gauge. If the
pressure
is lower than 3.5 bar (51 p.s.i.) it should be recharged using a tyre
pump (Schraeder Valve type). DO NOT OVER CHARGE.
8.19 Re-check pressure and when correct replace dust cap.
8.20 Turn on mains water supply and close hot tap.
9.0 FAULT FINDING
The Multipoint unit should give trouble free operation, however should a
problem occur, the tables below should enable most faults to be identied
with ease.
Fault Finding should be carried out by a competent person and any re-
placement parts used should be authorised Heatrae spare parts.
Figure 6. Removal of expansion vessel for maintenance puproses.
8.8 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.
8.9 Re-assemble the element plate assembly tting a new sealing gasket.
Rewire the unit with reference to Figure 4 (wiring diagram).
8.10 Repeat this for both element plate assemblies.
8.11 Re-commission the unit following the INSTALLATION and
COMMISSIONING instructions.
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.


1514
10. Indicator Light.......................................... 95 607 048
11. Pressure (Expansion) Relief Valve .......... 95 607 737
12. Check Valve.............................................95 607 987
13. Gasket (pack of 10) .................................95 611 708
14. Terminal Cover ........................................ 95 614 086
15. Pressure Reducing Valve ........................95 607 989
11.0 ACCESSORIES
The heater can be used to supply several hot water outlets via conventional
taps. Individual site demands should be considered when choosing
capacity and the number of outlets to be served.
A Thermostatic Blending Valve can be used in conjunction with the
Multipoint Water Heater. Heatrae Sadia supply both TMV2 approved (Pack
U3, code number 95 970 354) and TMV3 approved (Pack U7 95 970 360)
Thermostatic Blending Valves.
12.0 USER INSTRUCTIONS
12.1 The temperature can be adjusted by rotating the thermostat controls
located inside the terminal cover. It is recommended that both
thermostats are set at position 6 (approximately 60°C) however they
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. To avoid risk of freezing when the heater is
not 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 should be periodically maintained in accordance with the instructions
given under the section headed MAINTENANCE.
12.4 IMPORTANT NOTES TO USER
DO NOT BLOCK OR RESTRICT THE DISCHARGE FROM ANY
SAFETY VALVE FITTED.
DO NOT TAMPER WITH ANY SAFETY VALVE FITTED.
IF WATER DISCHARGES FROM ANY SAFETY VALVE FITTED
SWITCH OFF THE ELECTRICAL SUPPLY TO THE UNIT
IMMEDIATELY. CONTACT THE HEATRAE SADIA SERVICE TEAM
(TEL: [phone]) OR AN APPROVED INSTALLER. DO NOT
TURN THE ELECTRICAL SUPPLY ON AGAIN UNTIL THE UNIT HAS
BEEN CHECKED AND APPROVED BY A QUALIFIED INSTALLER.
10.0 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 REPLACE WITH PARTS NOT RECOMMENDED BY HEATRAE
SADIA. THIS WILL INVALIDATE YOUR GUARANTEE AND MAY RENDER
THE INSTALLATION DANGEROUS.
1. Temperature/Pressure Relief Valve ........... 95 605 045
2. Expansion Vessel ......................................95 607 045
3. Fixing Bracket (75 Litre) ............................95 607 046
3. Fixing Bracket (100 Litre) ..........................95 607 047
4. Thermostat ................................................ 95 612 019
5. Thermal Cut-Out ....................................... 95 612 020
6. Element Plate Assembly - 3kW ................95 606 926
6. Element Plate Assembly - 1.5 kW ............95 606 960
7. Fixing Bracket Bolts (pack of 6) ................95 607 050
8. Terminal Cover Screws (pack of 5) ........... 95 607 051
9. Flexible hose .............................................95 607 049
1
2
3
4
5
6
11
10
9
12
13
7
8
14

16
36005917 issue 5
Spares Stockists
For the fast and efcient supply of spares please contact the stockists listed
below.
Advanced Water Company Ltd.
Unit D5 Enterprise way
Vale park, Evesham
Worcs, WR11 1GS
Tel: [phone]
Fax: [phone]
Electric Water Heating Co.
2 Horsecroft Place, Pinnacles
Harlow, Essex, CM19 5BT
Tel: [phone]
E-Mail: [email protected]
SPD
Units 9 & 10 Hexagon Business Centre
Springeld Road, Hayes
Middlesex, UB40 0TY
Tel: [phone]
Parts Center
Tel: [phone]
www.partscenter.co.uk
Newey & Eyre
Specialist Products Division
Please contact your local branch
UK Spares Ltd.
Unit 1155 Aztec West, Almondsbury
Bristol, BS32 4TF
Tel: [phone]
William Wilson Ltd.
Unit 3A, 780 South Street
Whiteinch, Glasgow, G14 OSY
Tel: [phone]
Heatrae Sadia Heating
Hurricane Way Norwich NR6 6EA
www.heatraesadia.com
Service: 0844 8711535
Service Fax: [phone]
E-mail: heatraesadiaservice
@heateam.co.uk
© 2009