Heatrae Sadia Multipoint 30 Guía

Installation and User Instructions

MULTIPOINT 30 & 50 Litre

CONTENTS

SECTION PAGE

1.0 INTRODUCTION 2

2.0 TECHNICAL SPECIFICATION 4

3.0 INSTALLATION 5

4.0 COMMISSIONING 12

5.0 USER DEMONSTRATION 13

6.0 MAINTENANCE 14

7.0 FAULT FINDING 16

8.0 SPARE PARTS 17

9.0 ACCESSORIES 18

10.0 GUARANTEE 18

11.0 ENVIRONMENTAL INFORMATION 19

12.0 SPARES STOCKISTS 20

1.0 INTRODUCTION

Thankyou for purchasing a Heatrae Sadia Multipoint 30/50 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.

This Multipoint water heater must be installed (Sections 3.0),

commissioned (Section 4.0) and maintained (Sections 6.0) by a

competent person only. 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 commissioning, the operation of the

heater should be explained to the user (Section 5.0) and these

instructions left with them for future reference.

This appliance can be used by children aged from 8

years and above and persons with reduced physical,

sensory or mental capabilities or lack of experience

anf knowledge if they have been given supervision or

instruction concerning use of the appliance in a safe

way and understand the hazards involved.

Children shall not play with the appliance. Cleaning

and user maintenance shall not be made by children

without supervision.

1.1 IMPORTANT POINTS

1.1.1 The Multipoint unvented water heater is factory tted with a

Temperature/Pressure Relief Valve. The factory tted Temperature/

Pressure Relief Valve must not be removed, blocked or restricted in

any way. FAILURE TO PROVIDE ADEQUATE TEMPERATURE AND

PRESSURE RELIEF WILL INVALIDATE ANY GUARANTEE AND

LEAD TO A DANGEROUS INSTALLATION

1.1.2 Expansion must be accommodated within the system. Use of the

Expansion Vessel and Check Valve provided in the Installation Kit will

fulll this function.

1.1.3 The installation of this water heater is covered by Building Regulation

G3. In order to fulll the requirements of this Regulation, the heater

should be installed in accordance with these instructions by a

competent installer (i.e. an installer trained in the installation of

unvented water heating systems). All the control and safety valves

provided in the Installation Kit must be used and plumbed in

accordance with Figure 01.

1.1.4 The installation must be carried out in accordance with the relevant

requirements of:

• The appropriate Building Regulations either The Building

Regulations, The Building Regulations (Scotland) or Building

Regulations (Northern Ireland).

• The Water Fittings Regulations or Water Byelaws in Scotland.

WARNING: IF WATER FLOWS FROM THE PRESSURE RELIEF VALVE

OR TEMPERATURE/PRESSURE RELIEF VALVE, THE ELECTRICITY

SUPPLY MUST BE SWITCHED OFF IMMEDIATELY. CONTACT THE

HEATRAE SADIA SERVICE TEAM (Tel: 0844 8711535) OR AN

APPROVED INSTALLER.

1.2 PACK CONTENTS

Before commencing installation check that all the following components

have been supplied in the Installation Kit :

• Expansion Vessel ¾” BSP male, precharge pressure 0.32 MPa

(3.5 bar) c/w wall mounting bracket

• Combined Pressure Reducing Valve/Strainer ½” BSP female,

factory set at 0.35 MPa (3.5 bar)

• Single Check Valve 15mm x 15mm compression

• Pressure (expansion) Relief Valve ½” BSP male inlet, ½” BSP

female discharge factory set at 0.6 MPa (6 bar).

• Tundish ½” BSP male inlet, ¾” BSP female outlet

• Wall mounting bracket set

• Self adhesive Levelling Feet (2 off)

• Moulded plastic spacer

FIGURE 01: DIMENSIONS

2.0 TECHNICAL SPECIFICATIONS

Electrical Rating 3.0kW @ 240V/ 2.75kW @ 230V

Capacity 30 and 50 litres

Weight (50 Litre) 69.3kg (full)

Weight (30 Litre) 42.5kg (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)

50 Litre

30 Litre

Dim ension

888

616

937

665

1060

788

778

506

3.0 INSTALLATION

3.1 LOCATION

3.1.1 The Multipoint must be installed by a competent installer in accordance

with Building Regulation G3.

3.1.2 National Wiring rules may contain restrictions concerning the

installation of these units in bathrooms.

3.1.3 The unit should be vertically wall mounted using the wall bracket and

levelling feet supplied. The water connections must always be on the

bottom of the unit.

3.1.4 Enough space should be left below the unit for pipe connections and

above the unit for access to the Temperature/Pressure Relief Valve.

Refer to Figure 2 and the Dimensions Table to determine a suitable

position for the heater.

3.1.5 NOTE: Ensure that the wall can support the full weight of the unit (see

TECHNICAL SPECIFICATIONS) and that there are no hidden services

(electricity, gas, or water) below the surface of the wall.

3.1.6 DO NOT install where the unit may freeze.

3.1.7 Using Figure 01 and the Dimensions Table as a guide mark the position

of the wall mounting bracket and lower location point. Drill and plug the

wall with suitable xings, x the wall bracket to the wall.

3.1.8 Fit the heater wall bracket to the rear of the unit using the screws

provided ensuring the central location bolt is pointing towards the

bottom of the unit.

3.1.9 Remove the backing paper from the self adhesive pads of the Levelling

Feet and afx them to the lower back of the unit in the approximate

positions shown on Figure 02.

3.1.10 Hang the unit on the wall mounting bracket ensuring the location bolt

locates in the hole in the wall bracket. Position the moulded spacer

block between the tab on the bottom cover moulding and the wall.

Insert a No. 10 x 2 ½” long screw through the tab and spacer block and

tighten into wall plug.

3.2 PLUMBING

3.2.1 Refer to the section IMPORTANT INSTALLATION POINTS. Plumb

in the valves in the sequence shown in Figure 03. Ensure the valves

are installed in the correct orientation by reference to the direction

of ow arrows marked on them. The Expansion Vessel should be

supported by its own wall bracket (supplied), do not rely on the

pipework alone to support it.

3.2.2 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.

3.2.3 The INLET is marked BLUE, the OUTLET is marked RED. Several

hot outlets via conventional taps can be served, however, individual

site demands should be considered when choosing capacity and the

number of outlets to be served.

3.2.4 It is recommended that a WRAS Listed isolating valve is tted on the

cold water supply to the heater.

3.2.5 A drain cock must be tted below the heater in the inlet pipework. It

must be sited between the heater and the Check Valve (see Figure

03).

3.2.6 Plumbers Paste must not be used as it can impair the operation of

the valves.

FIGURE 02: BRACKET & LEVELLING FEET POSITIONS

3.3.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.

The Tundish supplied and the discharge pipes should be tted in

accordance with the Requirements and Guidance Notes of Building

Regulation G3. These are essentially as follows:

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.”

3.3.1 Discharge pipe MUST terminate in a SAFE, VISIBLE position

3.3.2 Water may drip from the discharge pipe of the pressure relief

device and that this pipe must be left open to the atmosphere.

3.3.3 The pressure relief device is to be operated regularly to remove

lime deposits and to verify that it is not blocked

3.3.4 The discharge pipe connected to the pressure relief device is to be

installed in a continously downward direction and in a frost free

enviroment.

FIGURE 03 SCHEMATIC: INSTALLATION DIAGRAM

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 01 on page 9 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.

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 G½” 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 (below):

• Maximum resistance allowed for a straight length of 22mm copper

discharge pipe (D2) from a G½” 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.

TABLE 01: SIZING OF COPPER DISCHARGE PIPE (D2) FOR COMMON

T & P RELIEF VALVE SIZES.

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

FIGURE 04: SCHEMATIC DISCHARGE PIPE ARRANGEMENT

3.4: 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.

3.4.1 The unit is supplied tted with a 1.0m 3 core 1.5mm2 exible

cable. The electicity supply should be fused 13 Amp for a 3kW model

and 5 Amp for a 1kW 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 diagram below.

3.4.2 The wires are colour coded as follows:

Green and Yellow EARTH

Brown LIVE (L)

Blue NEUTRAL (N)

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)

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