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Important Health and Safety Information for Installers and Service Engineers

Health and Safety at Work Act 1974
Consumer Protection Act 1987
COSHH Regulations 1988
The following information is given as a requirement of the
above legislation.
Great care is taken by GAH (HEATING PRODUCTS) LIMITED
to ensure that Electrastream systems are designed and
manufactured to meet general safety requirements when
properly used and installed as recommended in this manual.
It is the responsibility of Users and Engineers to ensure that
adequate protective clothing and glasses are worn when
working with the Electrastream system.

SEALS AND INSULATION

SEALS AND INSULATION
Insulation and sealing materials are used in the construction
of the Electrastream cylinders. Units are sealed and when
used in the manner for which they are intended the insulating
and sealing materials do not present any known hazard.
However always observe the following recommendations:-
1. Avoid inhalation of fibres or dust, wear face mask.
2. Avoid eye contamination by fibres or dust - wear eye
protection.
3. As far as possible avoid any skin contact with Fibreglass
Insulation, Glass Rope, Mineral Wool, Insulation Pads and
Ceramic Fibre.

PPPPPatent application 01514800.2

atent application 01514800.2

2010 GAH (HEATING PRODUCTS) L

2010 GAH (HEATING PRODUCTS) LTD.

TD.

Electrastr

Electrastream is a T

eam is a T

eam is a Trademark of GAH (HEATING PRODUCTS) L

rademark of GAH (HEATING PRODUCTS) L

rademark of GAH (HEATING PRODUCTS) LTD.

TD.

Manual by Harber Technical Services Tel/Fax 01263 515444

E-mail:[email protected] www.harbertech.co.uk

GAH (Heating Pr

GAH (Heating Products) Ltd.

oducts) Ltd.

Building 846
Bentwaters Parks
Rendlesham
Woodbridge
Suffolk IP12 2TW

TTTTTel:

el:

el: 01394 421160

01394 421160

Fax:

Fax: 01394 421170

01394 421170

email: [email protected]
www.gah.co.uk

In pursuance of a policy of constant development, GAH (HEATING PRODUCTS) LIMITED
reserve the right to change Electrastream parts or design without notice, therefore
certain details included in this manual may not be correct at the time of printing. Any
modification and improvements detailed in this manual does not commit GAH to update
any system previously supplied.

Manual Part No. ...................MAN1019
Manual Ref ..........................ES02
Issue ...................................13
Date ....................................25/02/13

GAH (HEATING PRODUCTS) LIMITED will not accept

responsibility for any damage or personal injury caused

by not giving due consideration to the above safety

recommendations.

OTHER MATERIALS

SEALANTS, ADHESIVES AND PAINTS

Sealants, Adhesives and Paints are used in the construction of
the Electrastream components. When used in the manner for
which they are intended they do not present any known hazard.

ELECTRIC

ELECTRIC
The Cylinder Tri-Core Heater, Pump, Thermostats and Contactor
Box all have electrical supply of 230V (enough to endanger
life).
Always isolate before connection, adjustment, servicing and
repair.
When the Tri-Core Heater cover is removed high power live
electrical terminals are exposed.
ISOLATE THE TRI-CORE HEATER BEFORE REMOVING ITS
COVER.
Earth protection - Earth Continuity Conductors must be fitted
and must comply with IEE Wiring Regulations.

HTS REF GAH ELECTRASTREAM 25/02/13

HEAL

HEALTH & SAFETY

TH & SAFETY

4-5.1 Tundish (supplied)

Normally the Electrastream cylinder is supplied with a TPR valve and PR valve (part of the
combination valve) fitted and plumbed to the Tundish.
Fig. 4-5b shows typical GAH expansion discharge arrangement for unvented cylinders.
The Tundish must be vertical and fitted within 500mm of the temperature and pressure
relief valve and must be located with the cylinder. The tundish must also be in a position
visible to the occupants, and positioned away from any electrical devices. The discharge
pipe from the tundish should terminate in a safe place where there is no risk to persons in
the vicinity of the discharge, and be made of metal.
The Tundish must not be located near or above electrical components, switches or
junction boxes.

4-5.2 Expansion Discharge - Self Sealing Valve

A Hepvo Self Sealing Valve enables alternative discharge arrangements to be used,
however its use and installation must be approved by the local building control. Refer to
G3 Regulation and valve supplier/manufacturers instructions for installation and servicing
requirements.

4-5.3 Expansion Discharge Pipe - To Gully

The discharge pipe from the Tundish must be installed to comply with Part G3 of the
Building Regulations (latest edition). The following text, and diagram 1 are reproduced
from G3 Building Regulations 2000 (as amended) Draft.

4-5

Expansion Discharge

Fig. 4-5a Tundish

AIR BREAK

DISCHARGE PIPE

INST

INSTALLA

ALLA

ALLATION 4

TION 4

WARNING

Scalding water and steam can be

blown out of the discharge pipe.

Position the discharge so that it is
not a hazard to property or people

(especially children).

Dischar

Discharge pipes fr

ge pipes fr

ge pipes from safety devices

om safety devices

Dischar

Discharge pipe D1

ge pipe D1

3.49

3.49 Each of the temperatur

temperatur

temperature r

e r

e relief valves

elief valves

elief valves or combined

combined

temperatur

temperature and pr

e and pr

e and pressur

essur

essure r

e r

e relief valves

elief valves

elief valves specified in 3.13 or

3.17 should discharge either directly or by way of a manifold via
a short length of metal pipe (D1) to a tundish.

tundish.

3.50

3.50 The diameter of discharge pipe (D1) should be not less
than the nominal outlet size of the temperatur

temperatur

temperature r

e r

e relief valve.

elief valve.

3.51

3.51 Where a manifold is used it should be sized to accept and
discharge the total discharge from the discharge pipes
connected to it.
3.52

3.52

3.52 Where valves other than the temperatur

temperatur

temperature and pr

e and pr

e and pressur

essur

essureeeee

rrrrrelief valve

elief valve

elief valve from a single unvented hot water system discharge

by way of the same manifold that is used by the safety devices,
the manifold should be factory fitted as part of the hot water

hot water

storage system unit

storage system unit or package.
TTTTTundish

undish

3.53

3.53 The tundish

tundish

tundish should be vertical, located in the same space

as the unvented hot water storage system

hot water storage system

hot water storage system and be fitted as close

as possible to, and lower than, the valve, with no more than
600mm of pipe between the valve outlet and the tundish

tundish

tundish (see

Diagram 1).
Note:

Note:

Note: To comply with the Water Supply (Water Fittings)
Regulations, the tundish

tundish

tundish should incorporate a suitable air gap.

3.54

3.54 Any discharge should be visible at the tundish

tundish

tundish. In addition,

where discharges from safety devices may not be apparent, e.g.
in dwellings occupied by people with impaired vision or mobility,
consideration should be given to the installation of a suitable
safety device to warn when discharge takes place, e.g.
electronically operated.

Dischar

Discharge pipe D2

ge pipe D2

3.55

3.55 The discharge pipe (D2) from the tundish

tundish

tundish should:

have a vertical section of pipe at least 300mm long below
the tundish

tundish

tundish before any elbows or bends in the pipework

(see Diagram 1); and

be installed with a continuous fall thereafter of at least 1 in
200.

3.56

3.56 The discharge pipe (D2) should be made of:
a.

metal; or

other material that has been demonstrated to be capable
of safely withstanding temperatures of the water
discharged and is clearly and permanently marked to
identify the product and performance standard (e.g.) as
specified in the relevant part of BS 7291).

3.57

3.57 The discharge pipe D2 should 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

44444