atag iSteel User guide

iSteel

INSTALLATION MANUAL

ISSUE 2015 – V1

FOR MORE INFORMATION GO TO:

www.atagheating.co.uk

INTRODUCTION

Cold Wa

ter Inlet Set

LOOSE

15 x 22mm Tundish

LOOSE

Temperature & Pressure Relief Valve

FITTED

Expansion Vessel

LOOSE

Expansion Vessel Bracket

LOOSE

Compression Nut Connection For Expansion Vessel

LOOSE

Immersion Heater(s)

- dependant on size and configurati

on LOOSE

Instruction Manual

LOOSE

Benchmark Log Book

– at the rear of this manual

LOOSE

The corrosion resistant iSteel Unvented cylinder is made from Duplex Stainless Steel. It is highly insulated with
environmentally friendly foam enclosed in a rust resistant white steel case.

It is available in Direct, and Indirect versions in a family of 7 sizes from 90 - 300 litres. Twin Coil Indirect units are available
in 5 sizes from 150 - 300 litres. There is also a range of slim-style units from 60 - 210 litres again in Direct and Indirect
versions, please contact ATAG Heating Technology about slim-style units.

To help ensure compliance with the relevant Water and Building Regulations all iSteel units are supplied complete with
the necessary safety and control devices needed to connect to the cold water mains. In order to ensure high flow-rate
performance with minimum pressure drop even in lower pressure areas, pre-set high quality controls have been selected.

iSteel is approved to demonstrate compliance with Water Regulations and Building Regulations G3 & Part L.

STORAGE PRIOR TO INSTALLATION

iSteel should be stored upright in a dry area and kept in its original packaging until immediately prior to installation.

INSTALLATION PREREQUISITES

This Cylinder should only be installed by a competent installer holding their G3 unvented qualification. The installation of
this product is also notifiable under the national Building Regulations.

ONCE COMPLETED THIS INSTRUCTION MANUAL IN ITS ENTIRETY SHOULD BE LEFT WITH THE HOME OWNER.

WHAT IS BENCHMARK?

Benchmark places responsibilities on both manufacturers and installers. The purpose is to ensure that customers are
provided with the correct equipment for their needs, that it is installed, commissioned and serviced in accordance with
the manufacturer’s instructions by competent persons and that it meets the requirements of the appropriate Building
Regulations. The Benchmark Checklist can be used to demonstrate compliance with Building Regulations and should be
provided to the customer for future reference.

Installers are required to carry out installation, commissioning and servicing work in accordance with the Benchmark
Code of Practice which is available from the Heating and Hotwater Industry Council who manage and promote the
scheme. Visit

www.centralheating.co.uk

COLD INLET SET – WHAT ARE THE CONNECTIONS?

EQUIPMENT SUPPLIED WITH THE CYLINDER

WATER SUPPLY

iSteel is capable of delivering over 50 litres per minute when connected to a suitable mains supply. The high quality inlet
control set with its 3 bar operating pressure has been designed to make the most of what is available however the
performance of any unvented system is only as good as the water supply.

In unvented systems both hot and cold services are supplied simultaneously from the mains so the maximum possible
on-site water demand must be assessed and the water supply should be tested to ensure it can meet these requirements.
If necessary consult the local water supplier regarding the likely pressure and flow rate availability.

It is important that site pressure readings are taken under dynamic flow conditions, high pressures under zero flow
conditions are not necessarily indicative of satisfactory performance. A minimum of 1.5 bar at 20 l/m flow should be
available. Where mains inlet pressures are likely to exceed 16 bar then an additional upstream pressure reducing device
should be fitted.

A minimum of 22mm supply pipe-work should ideally be provided and existing 1/2” (15mm) cold mains pipe-work may
need to be upgraded. Hard water treatment should be considered in areas where content it greater than 200ppm, if
required adjust cylinder temperature to below 60 degrees.

SITING THE UNIT

iSteel can be positioned more or less anywhere in the dwelling but it should be remembered that for every 1 metre that
an outlet is above the iSteel, the pressure will be reduced by 0.1 bar. If siting outside the heated envelope of the dwelling
such as in a garage or outbuilding then frost protection should be provided and exposed pipework should be insulated.

iSteel must be supported on a flat base capable of supporting the weight of the cylinder when full. The minimum
recommended cupboard size is 650mm square.

It’s important that consideration is given to access for maintenance of the valves. The immersion heaters are 375 mm
long and access space should be provided for possible future replacement, also adequate access to remove and re-install
the cylinder in the event of a problem.

SCHEMATIC

GENERAL INSTALLATION

COLD MAINS PIPEWORK

Run the cold main through the building to the place where the iSteel is to be installed. Take care not to run the cold pipe
near hot water or heating pipe work so that the heat pick up is minimised. Identify the cold water supply pipe and fit an
isolating valve (not supplied).

A 22mm BS1010 stopcock can typically be used but a 22mm quarter turn full bore valve would be better as it does not
restrict the flow as much. Do not use “screwdriver slot” or similar valves.

Make the connection to the cold feed of the cylinder and incorporate a drain valve. Position the inlet control just ABOVE
the Temperature & Pressure Relief Valve (TPRV) mounted on the side of the cylinder. This ensures that the cylinder does
not have to be drained down in order to service the inlet control set. Ensure that the arrow points in the direction of the
water flow.

Select a suitable position for the expansion vessel. Mount it to the wall using the bracket provided. Use the compression
connection supplied to connect the vessel into the cold water pipe adjacent to the cold feed point on the cylinder. There
must be no obstruction or flow restriction between the cylinder and the expansion vessel.

BALANCED COLD CONNECTION

If there are to be showers, bidets or mono-bloc taps in the installation then a balanced cold supply is necessary. There is
a 22mm balanced connection on the inlet control set. All outlets in the house will be at 3 bar and thus automatically
balanced.

HOT WATER PIPEWORK

Run the first part of the hot water distribution pipework in 22mm. This can be reduced to 15mm and 10mm as appropriate
for the type of tap etc. Your aim should be to reduce the volume of the hot draw off pipework to a practical minimum so
that the time taken for the hot water is as quick as possible.

Do not use mono-bloc mixer tap or showers if the balanced cold connection is not provided, the unit will back pressurise
and result in discharge. Ensure that the top of the vessel is accessible for servicing.

PRIMARY COIL CONNECTIONS (INDIRECT ONLY)

Compression connections are provided for the primary circuit which must be positively pumped. Primary flow and return
connections are interchangeable to suit site conditions without affecting reheat times. These connections are metric and
should be changed by the installer if using Irish size copper tube.

Sealed or vented primary circuits can be used, to comply with normal installation practice the primary pressure should
not exceed 3 bar although the coil in the iSteel is suitable for up to 7 bar if required. The boiler may be Gas, Electric, and
Oil etc. but must be under effective thermostatic control. Uncontrolled heat sources such as some AGA’s, back boilers,
solid fuel stoves, etc. may not be suitable please contact us for guidance. The two port zone valve should be installed into
the primary flow pipework leading to the coil flow inlet. The direction of flow arrow should be towards the primary flow
connection. On twin coil cylinders an extra thermostat boss is provided.

SECONDARY CIRCULATION

Where secondary circulation is required a circulator suitable for potable water should be used in conjunction with a non­return valve to prevent backflow. It may be necessary to incorporate an extra expansion vessel into the circuit to
accommodate the increased system water volume in larger secondary circulation systems. Where off peak electrical
tariffs are being used then secondary circulation should be avoided. A secondary return boss is fitted as standard on 210,
250 & 300L. On smaller sizes tee into the cold feed pipe above the drain.

IMMERSION HEATERS

As a requirement of Building Regulations the iSteel immersion heaters are fitted with thermal cut-out in addition to the
normal control thermostat. To help ensure correct replacement the immersion heaters have a special 1¾" thread. They
are of a low noise Incoloy construction and rated at 3 kW at 240 V. Replacement immersion heaters should be purchased
via ourselves otherwise your guarantee may be affected. For commercial / heavy duty installations where constant usage
/ reheat is required Titanium immersion heaters must be fitted in order to comply with the warranty.

The ‘O’- ring on the head of the immersion heater should be correctly positioned and lubricated before fitting. Screw in
hand-tight until almost sealed then gently tighten as the ‘O’ rings will seal easily. The electrical supply to each immersion
heater/s must be fused at 13A via a double pole isolating switch to BS 3456. The cable must be 2.5mm
(85°C HOFR) sheathed flex complying to BS 6141:1981 Table 8. Do not operate the immersion heater/s until the unit is
full of water. If any sterilisation liquid is in the cylinder do not operate the immersion heater/s as this will cause premature
failure. Electric to be supplied by a fused supply compliant with local regulations, and fitted by a qualified Part P
Electrician.

2

heat resistant

ENERGY CUT OUT AND CYLINDER THERMOSTAT (INDIRECT ONLY)

600 mm Max

As a requirement of Building Regulations the iSteel units are fitted with a thermal cut-out in addition to the normal control
thermostat. This unit should be fitted to the dedicated boss on the cylinder and wired to the two port valve controlling
the primary flow (see wiring diagram).

DISCHARGE ARRANGEMENT

This guidance is available as a download of the G3 Approved Document from www.planningportal.gov.uk.

The discharge from both the temperature relief and expansion relief valves can be joined together via a 15mm end feed
tee.

It is important that any discharge water does not collect in this pipe-work and can run freely to the tundish.

The tundish should be mounted in a vertical and visible position located in the same space as the unvented hot water
storage system and be fitted as close as possible and within 600mm of the safety device e.g. the temperature relief valve.
The discharge pipe-work from the tundish must be routed in accordance with Part G3 of the Building Regulations.

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, be of metal and:

• 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 flow resistance. An alternative
approach for sizing discharge pipes would be to follow BS6700 Specification for design installation, testing and
maintenance of services supplying water for domestic use within buildings and their curtilages.

• Have a vertical section of pipe at least 300mm long, below the tundish before any elbows or bends in the pipework.

• Be installed with a continuous fall.

• It is preferable for the discharge to be visible at both the tundish and the final point of discharge but where this is

not possible or practically difficult there should be clear visibility at one or other of these locations.

Examples of acceptable discharge arrangements are:

1. Ideally below the fixed grating and above the water seal in a trapped gulley.

2. Downward discharges at a 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 play or otherwise come into contact with
discharges, a wire cage or similar guard is positioned to prevent contact whilst maintaining visibility.

3. Discharges at a high level; e.g. in to 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 plastic guttering systems that would collect such discharges (tundish available).

4. 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 can be traced reasonably easily. The single common discharge
pipe should be at least one pipe size larger than the largest individual discharge pipe 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, infirm or disabled people, consideration should be given to the installation of an electronically
operated device to warn when discharge takes place.

Any queries with regard to discharge arrangement contact your local council planning office.

TWIN COIL FORMAT

Indirect twin coil units can be installed in two separate formats:

• In a solar powered system with a backup boiler.

• In a system with two non-solar heat sources (normally two boilers).

With either format it is essential that the installation meets all current regulations including, in particular, the high limit
cut out requirements of Building Regulation G3.

UPPER COIL

This is connected to the boiler as per the instructions for a iSteel single coil cylinder with the high limit thermostat inserted
into the middle thermostat pocket and wired to control the supplied two port valve in either the primary flow or return
as indicated in the wiring instructions.

LOWER COIL – SOLAR VARIENT

In a solar system the lower coil is connected to the solar heat source. Either primary coil connection may be used for flow
or return. The solar cylinder sensor supplied is inserted into the lower thermostat pocket and the energy cut out into the
upper pocket. The ‘mechanical’ control thermostat is not normally utilised in a solar system. In systems where the panels
are above the cylinder then the energy cut out shall be wired so as to interrupt the power supply to the solar pump or
controller in the event of over temperature.

In systems where the cylinder is above the panels then the energy cut out should be wired to a suitable two port valve
(not supplied) on the return pipe-work to the solar panel.

LOWER COIL – NON SOLAR VARIENT

This is connected to the additional boiler as per the instructions for a iSteel single coil cylinder with the high limit
thermostat inserted into the lower thermostat pocket and wired to control the supplied two port valve in either the
primary flow or return.

WIRING DIAGRAM 2 X 2 PORT ZONE VALVES (TYPICALLY HONEYWELL “S” PLAN)

O

G/Y

G/Y

Br

G Bl

C

E 2 C E 2 1 Br G Bl O

1 2 3 4

5

6 7 8

9

10

1

2 3 4

5 6

7

8 9 10

1

2

3

E

L=Live, N=Neutral, C=Common, SL=Switched Live, E=Earth

O

G/Y G/Y

W G Bl

C

E 2

C

E 2

L

1

Br G Bl O

1

2

3

4

5 6

N

3 Port

Mid Position

E

HTG

ON

DHW

ON

DHW

OFF

L

N E

SL

1 2

3 1

2 3

L

N E

N

L

N

E

2

3

2 Port (Heating)

Cutout

(combined) Duostat

2 Port (DHW)

PUMP

Wiring Centre

Room Stat

Programmer

Boiler

G=Grey, Bl=Blue, O=Orange, G/Y=Green/Yellow, Br=Brown

7

8 9 10

1 2

3

4 5 6 7 8 9 10

1

2 3 E L

N E

HTG

ON

DHW

ON

DHW

OFF

L N

E

SL

2 3 1 2

3

L

N E

N

L

N

E

2

3

Cutout (combined) Duostat

2 Port (DHW)

PUMP

Wiring Centre

Room Stat

Programmer

Boiler

W= White, G=Grey, Bl=Blue, O=Orange, G/Y=Green/Yellow, Br=Brown

L=Live, N=Neutral, C=Common, SL=Switched Live, E=Earth

WIRING DIAGRAM 3 PORT + 2 PORT ZONE VALVES (TYPICALLY HONEYWELL “Y” PLAN)

COMMISSIONING SERVICING

FILLING

Check all connections for water tightness including any factory made connections such as the temperature and pressure
relief valve. The pressure in the expansion vessel should be checked to ensure it is 3 bar (45PSI). The valve is of the car
tyre (Schrader) type.

The hot tap furthest away from the iSteel should be opened before filling the system to let air out.

The system should be flushed before use. The remaining taps should be opened in turn to expel air.

DIRECT UNITS

The system must be fully filled and flushed before switching on the power to the immersion heaters and allowing the
unit to heat up. The immersion heater is supplied pre-set at 55°C. Turning fully to + sets to approx. 65°C.

INDIRECT UNITS

Ensure the lever on the two port valve is set to the filling position and use the boiler manufacturers commissioning
instructions to fill the primary circuit. When full release the lever. Switch the programmer to Domestic Hot water (DHW)
and allow the unit to start to heat. Adjust the dial of the dual thermostat to between 55°C and 65°C as required.

STORAGE TEMPERATURE

A storage temperature of 60-65°C is normal for both direct and indirect iSteel. In hard water areas consideration should
be given to reducing this to 55-60°C. In many healthcare applications the guidance on Legionella control and safe water
delivery temperatures will require storing the water at 60-65°C, distributing at 50-55°C and using thermostatic mixing
valves to control the final temperature. For details consult the NHS estates guidance on safe hot water temperatures.

SAFETY VALVE CHECKS

Any water coming from either the expansion relief valve or the temperature / pressure relief valve during heat up is
indicative of a problem which needs to be identified and rectified. The temperature relief and expansion relief valves
should be fully opened, one at a time then both together allowing as much water as possible to flow through the tundish.
Check that your discharge pipework is free from debris and is carrying the water away without spillage over the tundish
and release the valves and check that they re-seat properly.

GENERAL

Servicing should only be carried out by competent installers and any spare parts used must be purchased from ATAG
Heating Technology UK Ltd. NEVER bypass any safety devices or operate the unit without them fully operational.

DRAINING

Isolate from the electrical supply to prevent the immersion heaters burning out. Isolate the unit from the cold mains.
Attach a hose to the draining tap ensuring it reaches to a level below the unit (This will ensure an efficient syphon is set
up and the maximum amount of water is drained from the unit). Open the hot tap closest to the unit and open the
draining tap.

WARNING: WATER DRAINED OFF MAY BE VERY HOT!

ANNUAL SERVICING

A competent installer should carry out the following checks on an annual basis, ideally at the same time as the annual
boiler service.

1. The expansion relief valve on the inlet control set should be eased open allowing water to flow for 5 seconds. The
valve should then be closed making sure it resets correctly. Repeat this procedure with the pressure / temperature
relief valve. Always insure that the discharge pipework is allowing the water to drain away adequately. If not check
for blockages etc. and clear.

2. Ensure that any immersion heaters that are fitted are working correctly and that they are controlling the water at
a temperature of between 55°C and 65°C.

3. Make sure the pressure in the expansion vessel is charged to 3 bar. Turn off the water supply to the unit and open
a hot tap first. The valve on the expansion vessel is a Schrader (standard car tyre) type. Air or CO2 can be used to
re-pressurise the expansion vessel.

4. Remove the head on the inlet control set by unscrewing, and clean the mesh filter within.

5. The benchmark service record supplied within this manual should be updated at each service.

YOUR GUARANTEE MAY BE VOID WITHOUT PROOF OF ANNUAL SERVICING. THE COMMISSIONING CERTIFICATE

SUPPLIED AT THE REAR OF THIS MANUAL SHOULD ALSO BE COMPLETED BY THE INSTALLER.

WARNING: THE WATER DISCHARGED MAY BE VERY HOT!

GUARANTEE

The iSteel stainless steel vessel carries a 25 year guarantee against faulty materials or manufacture provided that:

• It has been correctly installed as per this document and all the relevant standards, regulations and codes of practice
in force at the time.

• It has not been modified in any way, other than by ATAG Heating Technology UK Ltd.

• It has not been misused, tampered with or subjected to neglect.

• It has only been used for the storage of potable water.

• It has not been subjected to frost damage.

• The unit has been serviced annually.

• The benchmark service record has been filled in after each annual service.

• The guarantee period starts from the date of purchase and no registration is required.

• The extended guarantee is not transferable, and rests with the original householder.

• The system is fed from a public mains water supply.

• Store temperatures do not exceed 65°C.

• Installations are made only in the UK & Republic of Ireland.

• The water supply does not have a Chloride content greater than 250ppm.

• Units are not installed with uncontrollable heat sources (E.g. Wood Burning Stoves).

• For commercial / heavy duty installations where constant usage / reheat is required Titanium immersion heaters

must be fitted in order to comply with the warranty.

Please note that invoices for servicing may be requested to prove that the unit has been serviced annually. All the
components fitted to / or supplied with the iSteel carry a 2 year guarantee. The guarantee starts when the cylinder is first
filled.

EXCLUSIONS – THINGS THE GUARANTEE DOES NOT COVER

The effects of scale build up. Any labour charges associated with replacing the unit or its parts. Any consequential losses
caused by the failure or malfunction of the unit.

GUIDANCE IN THE EVENT OF A PROBLEM

If you have a problem in the first year contact the plumber who fitted the unit. Thereafter contact the plumber who
carries out the annual servicing for you. If your iSteel develops a leak we will supply you with a new one. We ask for an
up-front payment to prevent fraud.

We will require the original unit to be returned to us for inspection along with a copy of your service record and
commissioning check sheet. If it is confirmed that it has failed within the terms of the warranty your upfront payment
will be refunded. If a component part fails within the two year guarantee period we will send you a new one again with
an upfront charge. Credit card details may be taken to prevent fraud. We ask you to post the faulty part back to us within
one month by recorded delivery. Once the part has been tested and proven faulty a refund will be issued.

USER INSTRUCTIONS

Your stainless system is automatic in normal use and requires only annual servicing. You should employ a competent
installer to perform the annual servicing. Normally this is timed to coincide with the annual boiler service.

If this water is hot turn the boiler and / or the immersion heater off. Do not turn off the water until the discharge runs
cool. The discharge may also stop.

Tell them you have a fault on an unvented cylinder. We stock all the spare parts they may need.

IF WATER IS FLOWING FROM THE SAFETY VALVES THROUGH THE TUNDISH THIS INDICATES A

FAULT CONDITION AND ACTION IS NEEDED.

CALL A COMPETENT PLUMBER OUT TO SERVICE THE UNIT.

PLEASE NOTE

Before making any claim/return on a iSteel Cylinder or Component, please make sure you have run through the following
fault finding options and check the offending item is less than one year old or the unit has been serviced every 12 months
in line with the Benchmark Scheme.

Proof of this will be required when returning any part, also note all components are date stamped. Failure to do this will
result in any credit/claim being rejected.

FAULT FINDING INFORMATION

Symptoms

Possible causes

Follow up action

Check all connection points including

P

ossible fault at Pressure Reducing

Follow fault finding information for

Check all mixer type outlets are served

Expansion valve operates

Follow fault finding information for

Noise when operating tap

External work to public mains.

Wait for works to be completed.

Strip & Clean or replace Inlet Control

Strip & Clean or replace Inlet Control

Follow fault finding information for

Check operation of the boiler and its

Symptoms

Possible causes

Follow up action

Vessel needs resizing and installation by

Pre-charge requires setting while

Replace membrane or entire vessel.

Re-pre

ssurise or consider replacement

Failure of Flange Plate.

Replace Flange Plate or entire vessel.

Loss of torque in Fla

nge retaining bolts.

Re-

tighten bolts as needed.

Ruptured membrane has caused

Replace membrane or entire vessel.

Water is discharged from

UNVENTED CYLINDER

Cylinder appears to leak
from within the case.

Expansion valve operates
and water is visible at the
Tundish.

when cylinder is heated.

outlet.

Reduced Water flow.

No hot water available.

EXPANSION VESSEL

Discharge of water from the
relief valve.

Loose cylinder Connection.

valve.

Back pressure from the system.

Possible fault at Expansion Vessel.

Insecure pipework. Increase the number of pipe clips.

Debris from water mains.

Pressure reducing valve sticking.

Immersion heater failure.

Boiler failure.

Expansion Vessel is too small.

Pre-charge set incorrectly on vessel
installation.

Membrane is ruptured and may require
replacement.

Membrane may be partially
de-pressurised due to natural losses
and require re-pressurisation.

immersion heaters to ensure integrity
of joint and remake any suspect joints.

Inlet Control Group.

by a balanced cold service. Where not
re-pipe or install bespoke pressure
reducing valve to offending outlet.

Expansion Vessel.

Group.

Group.

immersion heater.

controls.

appropriately qualified engineers.

system is de-pressurised according to
cylinder manufacturer’s
recommendations.

Inspect Shrader valve for leaks or
damage.

depending on ae of vessel and amount
of pressure lost. Inspect Shrader valve
for leaks or damage.

Leak from flange or water
connection.

Vessel appears to be full of
liquid when system is cold.

vessel when Shrader pin is
de-pressed for inspection of
air pressure.

corrosion of vessel body resulting in
pinhole leak.

Membrane is de-pressurised.

Membrane is ruptured.

Entire vessel must be replaced. Inspect
Shrader valve for leaks or damage.

Inspect Shrader valve for leaks or
damage.

Membrane or vessel requires
replacement.

INLET CONTROL GROUP

Fault Finding Information

TUNDISH

Fault Finding Information

T&P RELIEF VALVE

Fault Finding Information

DUAL THERMOSTAT

Fault Finding Information

IMMERSION HEATER

Fault Finding Information

ENERGY CUT OUT

Fault Finding Information

CONDITIONS OF SALE

1. Definitions
“Buyer” means the person w ho accepts a quotation of the Company for the
sale of the Goods or whose order for the Goods is accepted by the Company
“Company” means ATAG Heating Technology U K Ltd.
“Conditions” means the terms and conditi ons of sale set out in this document
and any special terms and conditions agreed i n writing by the Company a nd
the Buyer
“Contract” means the contract for the purchas e and sale of the Goods
“Goods” means the goods which the Co mpany is to supply a nd which the
Buyer agrees to buy in accordance with these conditions
“Price” means the pri ce for the Goods including transpor t and insurance (if
any)

1.2 Any reference in these C onditions to any provision of a statute shall be
construed as a reference to that provision as amended re-enacted or extended
at the relevant time

1.3 The h eadings in these Conditions are for convenience only and shall not
affect their interpretation

2. Basis of sale

2.1 The Compa ny shall sell and the Buy er shall purchase the Goods in
accordance with:-

2.1.1 the Company’s q uotation (if provided by the Company and accepted by
the Buyer); or

2.1.2 (if the Company does not submit a quotation and following a re quest or
purported order from the Buyer for Goods) in accordance with the Company’s
offer to the Buyer (if accepted by the B uyer) subject i n either cas e to the se
Conditions, which shall go vern the Contract to the exclusion of any other
terms, subject to which any such quotation or offer is accept ed, or purported
to be accepted.

2.2 Any variation to these C onditions (including any sp ecial terms and
conditions agreed between t he parties) shall be inappli cable unless agreed in
writing by the Company

2.3 Any advice or recommendation given by the Company or its employees or
agents to the Buyer or its employees or agents as to the storage application or
use of the Goods which is not confirmed in writing by the Company is followed
or acted upon entirely at th e Buyer’s own risk and accordingly the Company
shall not be liable for any such advic e or recommendation which is not so
confirmed

2.4 Any typographical clerical or other error or omission in any sales literatu re
quotation price list acceptance of offer i nvoice or other document or
information issued by the Company shall be subject to correction without any
liability on the part of the Company

2.5 All specifications, draw ings, particulars of weight and dimension and
performance data c ontained in any of the Company’s literature are
approximate only.

2.6 The Company reserves the right to i mprove and/or modify any
specifications, designs and dimensions with out notice.

2.7 For the avoidance of doubt nothing in these Conditio ns or any Contract
shall confer on any third party any benefit nor the right to enforce any term of
these Conditions or any Contract whether pursuant to the Contracts (Rights of
Third Parties) Act 1999 or otherwise

3. The Price and payment

3.1 The Price shall be either:-

3.1.1 the Company’s quoted price which shall only be valid for 30 days from its
date after which time the Price may be altered by the Company and shall be
subject to the Company re-quoting; or

3.1.2 where no price has been quoted the Price listed in the then current price
list of the Company sent by the Company to th e Buyer from time to time.

3.2 Except as otherwise state d in the Company’s quotation or i n any price list
of the Company or otherwise agre ed in wr iting between the Buyer and the
Company, all prices are given by the Company to include the Company’s
charges for transport and insurance.

3.3 The Price a nd any other sums payable by the Buyer t o the Company is
exclusive of any applicable Value Added Tax, which the Buyer shall be
additionally liable to pay to the Company.

3.4 [Subject to any special terms agreed in writing betwee n the Buyer and the
Company,] the Company may i nvoice the Buyer for the Pr ice of the Goods on
or at any time after delivery of t he Goods, [or any instalment of the G oods]
unless the Goods are to be collected by the Buyer or the Buyer wrongfully fails
to take delivery of the Goods, in which event the Company shall be entitled to
invoice the Buyer for the Price at any time after th e Company has notified the
Buyer that the Goods are ready for collection or (as the case may be) the
Company has tendered delivery of the Goods.

3.5 Save as otherwise agreed in writing, payment of the Price and VAT shall be
due within the agreed period from the date of the invoice without deducti on
or set off. Time for payment shall be of the ess ence

3.6 If the Buyer fails t o make any payment on the due date then with out
prejudice to any other right or remedy available to the Company the Company
shall be entitled to:

3.6.1 cancel the contract or suspend any furth er deliveries to the Buyer

3.6.2 appropriate any payment made by the Buyer to such of t he Goods (or
the Goods su pplied under any other contract between the Buyer and t he
Company) as the Company may think fit (n otwithstanding any purported
appropriation by the Buyer) and

3.6.3 charge the Buyer interest (both before and after any judge ment) on the
amount unpaid at the rate of 8% per cent per annum above Barclays Bank PLC
base rate from time to time until payment in full is made (a part of a month
being treated as a full month for the purpose of calculating interest)

4. The Goods

4.1.1 T he quantity and description of the Goods shall be as set out i n the
Company’s quotation or in the Company’s off er (as the case may be); and

4.1.2 the quality and s pecification for the Goods s hall be as s et out in the
Company’s quotation or (where there is no quo tation) in the Company’s
literature and brochure for the Goods in questi on.

4.2 The Buyer shall be responsible to t he Company for ensuri ng the accuracy
of the terms of any order and any information supplied for the Compa ny as to
its requirements (including but withou t limitation the use to which the Goods
will be p ut and any applicable specification) submitted by the Buyer an d for
giving the Company any nec essary information relating to the G oods within a
sufficient time to enable the Co mpany to perform the Contract in accorda nce
with its terms

4.3 If the Goods are to be manufactured or any pr ocess is to be applied to the
Goods by the Company in accordance with a specification submitted by the
Buyer the Buyer shall indemnify the Company against all losses damages costs,
claims, demands, li abilities and expenses aw arded against or inc urred by the
Company in connection with or paid or ag reed to be paid by the Company in
settlement of any claim for infringement of any patent copyright design trade
mark or other industrial or intellectual property rights of any other person
which results from the C ompany’s use of the Buyer’s specification or from
compliance by the Company with th e Buyer’s instructions whether express or
implied.

4.4 No order which has been acc epted by the Compa ny may be cancelle d by
the Buyer except with the agreement in writi ng of the Company and on terms
that any deposit paid shall not be repayable and that the Buyer shall indemnify
the Company in full against all loss (including loss of profit) costs (including the
cost of all labour and materials used) damages charges and exp enses incurred
by the Company in carrying out any work in respect of the Goods or otherwise
as a result of cancellation

4.5 All designs, sketches, or similar articles supplied by or submitted in
confidence by the Com pany shall remain the property of the C ompany and
may not be disclosed by nor us ed by nor copied or otherwise reproduc ed by
the Buyer without the prior written consent of the Company.

5. Delivery of Goods

5.1 Unless otherwise agreed in writing the Company shall deliver the Goods to
such delivery address as is specified by the Buyer to the Company at such time
as the Goods or part thereof (as the case may be) are ready for delivery.

5.2 The Buyer s hall be responsible f or offloading the Go ods at the delivery
address and shall advise the Company of any local or internal laws, byelaws or
rules relating to parking or loading of vehicl es at the delivery address.

5.3 The Buyer shall be responsible for ensuring t hat access to the deli very
address is wholly by a road wi th a surface capable of withstanding the weight
and size of a vehicle carrying the Goods.

5.4 Any dates quoted for delivery of the Goods are approximate only and the
Company shall not be liabl e for any delay in delivery of th e Goods howsoever
caused Time for delivery shall not be of the essence unless previously agreed
by the Company in writing The Goods may be delivered by the Company in
advance of the Delivery Date upon giving reas onable notice to the Buyer

5.5 Where the G oods are to be delivered in instalments each delivery shall
constitute a separate contract and failure by the Com pany to deliver any one

or more of th e instalments in acc ordance with these C onditions or any cla im
by the Bu yer in respect of any o ne or more instalments shall not entitle t he
Buyer to treat the Contract as a whole as rep udiated

5.6 If the Buyer fail s for any reason whatsoever t o take delivery of the Goods
or fails to give the Company ad equate delivery instructions at the time stated
for delivery (otherwise than by reason any cause beyond the Buyer’s
reasonable control or by reason of th e Company’s fault) then without
prejudice to any other right or remedy available to the Company the Company
may:

5.6.1 store the Goods until actual delivery and charg e the Buyer for the
reasonable costs (including insurance) of returning the Goods to the
Company’s premises, storage and for transport, packaging and insurance f or
re-delivery of the Goods; or

5.6.2 sell the G oods at the b est price readily obtaina ble and (after de ducting
all reasonable storage a nd selli ng expe nses) acco unt to the Buyer for the
excess over the Price or charge the Buyer for a ny shortfall below the Price

5.8 Goods may not be returned to the Company except by prior written
permission of an authorised officer of the Company a nd such return shal l be
subject to payment by the Buyer of handling and re-stocking charges,
transport and all other costs incurred by th e Company

6. RISK AND RETENTION OF TITLE

6.1 goods supplied by th e Company shall be at the Buyer’s risk immediately
upon delivery to the Buyer or i nto custody on the Buyer’s behalf or to t he
Buyer’s Order. The Buyer shall effect adequate ins urance of the goods against
all risks to the full i nvoice value of the goods, suc h insurance to be effective
from the time of delivery until property in the goods shall pass to the Buyer as
hereinafter provided.

6.2 property in the goods suppli ed hereunder will pass to the Buyer wh en full
payment has been made by the Buyer to the C ompany for :-

6.2.1 the goods of the subject of this contract.

6.2.2 all other go ods the subject to of any other c ontract between the Buy er
and the Company which, at the time of payment of the full price of t he goods
sold under this contract, have been delivered to the Buy er but not paid for in
full.

6.3 until property in the g oods suppli ed hereunder passes to the Buyer in
accordance with paragraph (3) above.

6.3.1 the Buyer shall hold the goods in a fiduciary capacity for us and shall store
the same separately fr om any other goods i n the Buyer’s possession and in a
manner which enables them to be identified as our goods.

6.3.2 the Buyer shall immediately return the goods to the Company should the
Companies authorised representative so re quest. All the necessary incidents
associated with a fiduciary relationship shall apply.

6.4 the Buyer’s right to possess the goods shall ceas e forthwith upon the
happening of any of the following events, nam ely :-

6.4.1 if the B uyer fails to mak e payment in full for the goods wi thin the time
stipulated in clause 3 hereof.

6.4.2 if the Buyer, not being a company, commits any act of bankruptcy, makes
a proposal to his or her creditors for a compromise or does anything which
would entitle a petition for a Bankruptcy Order to be presented.

6.4.3 if the Buyer, being a company, does anything or fails to do anything which
would entitle a n administrator or an administrative receiver or a receiver to
take possession of a ny assets or which w ould entitle any person t o present a
petition for winding up or to apply for an administ ration order.

6.5 the Buyer hereby grants to the Company an irrevocable licence to enter at
any time a ny vehicle or premises owned or occupi ed by the Buyer or in the
possession of the Buyer for the pur poses of repossessing and recovering any
such goods the property in which has remained in the Company u nder
paragraph (2) above. The Company shall not be responsible for and the Buyer
will indemnify the Company against liability in respect of damage caused to
any ve hicle or premises in such repossession and re moval being damaged
which it was not reasonably practicable to avoid .

6.6 notwithstanding paragraph (4) hereof and subject to paragraph (5) hereof,
the Buyer s hall be permitted to sell the goods to third parties in the nor mal
course of business. In this respect the Buyer shall ac t in the capacity of the
Companies commission agent and the proceeds of such sale :-

6.6.1 shall be held in tr ust for us in a manner which e nables such proceeds to
be identified as such, and :

6.6.2 shall not be mixed with ot her monies nor pai d into an overdraw n bank
account. The Company, as principal, shall remunerate the Buyer as
commission agent a commission depending upon the surpl us which the Buyer
can obtain over and above the sum, stipulated in this contract of supply which
will satisfy the Company.

6.7 in the event that the Buy er shall sell any of the goods pur suant to clause
(5) hereof, t he Buyer shall forthwith inform the Company in writing of such
sale and of the identity and address of the third party to whom the goods have
been sold.

6.8 if, before property in the goods passes t o the Buyer under paragraph (3)
above the goods ar e or become affixed to any land or bui lding owned by the
Buyer it is hereby agr eed and declared that su ch affixation shall not hav e the
effect of passing property i n the goo ds to the Buyer. Furthermore if, before
property in the goods shal l pass to the Buyer under paragr aph (3) hereof, the
goods are or become affixed to any land or building (whether or not owned by
the Buyer), the Buyer shall:-

6.8.1 ensure that the goods are capable of being removed without material
injury to such land or building.

6.8.2 take all necessary steps to prevent title to the go ods from passing to the
landlord of such land or building.

6.8.3 forthwith inform the Company in writing of such affi xation and of the
address of the la nd or building concerned. The Buyer warr ants to repair and
make good any damage caused by the affixation of the g oods to or their
removal from any land or building and to indemnify the Company aga inst all
loss damage or liability the Company may incur or sustain as a result of
affixation or removal.

6.9 in t he event that , before pro perty in the goods has passed to the Buyer
under paragraph (3) hereof, the goods or any of t hem are lost, stol en,
damaged or destroyed :-

6.9.1 the Buyer shall forthwith inform the Company in writing of the fact a nd
circumstances of such loss, theft, damage or d estruction.

6.9.2 the Buyer shall assign to the Company the benefit of any insurance claim
in respect of the goods so lost, stolen, damage d or destroyed.

7. Warranties and liability - FOR PROUCTS INSTALL ED IN THE UK ONLY

7.1 Subject to the following provisions, the Company warrants that the Goods
will be free from defects in material and work manship f or a period of 24
months from their delivery to t he Buyer, unless a period of different duration
is specified in the product i nstallation instructions i n respect of that product
and/or its specific warranty terms, or specifi ed components thereof.

7.2 The warranty in clause 7.1 is given by the Company subject to the following
conditions:

7.2.1 the C ompany shall be under no liability in respect of any defect in the
Goods arising fr om any information drawing design or specification s upplied
by the Buyer.

7.2.2 the Compa ny shall be under no liability in respect of a ny defect arising
from fair wear and tear wilful damag e negligence abnormal working
conditions failure to follow the Co mpany’s instructio ns (whether oral or i n
writing) misuse or alterati on or re pair of the Goods w ithout the Company’s
approval

7.2.3 the C ompany shall n ot be liable for any consequential damage (s)
occurred to the Buyer, or the Buyer’s customer’s property, caused by failure
of the Company’s Goods. Any such costs incurred shall be claimed by the Buyer
or the Buyer’s customer’s insurance party.

7.2.4 the ab ove warranty do es not extend to parts mat erials equipment not
manufactured b y the Company in respect of whic h the Buyer shal l only be
entitled to the benefit of any suc h warranty or guarantee as is given by the
manufacturer to the Company.

7.3 The Buyer shall n ot make any stat ement or representation or g ive any
warranty to a ny third party in respect of any Goods other than in the ter ms
made or given by the C ompany to the Buyer in thes e Conditions nor shall the
Buyer have any authority to commit the Company to provide any service in
relation to th e Goods. The Buyer shall indemnify the Company against all
losses, damages, costs, claims, demands, liabilities a nd expenses incurred or
suffered by the Company in respect of or arising out of any such statement,
representation or warranty mad e or g iven by t he Buyer i n contravention of
this clause.

7.4 The Company’s liability to the Buyer for -

7.4.1 death or injury resulting from its own or that of its employees’ agents’ or
subcontractors’ negligence; and

7.4.2 damage suffered by the Buyer as a result of any breach of the obligations
implied by Section 12 of The Sale of Goods Act 1979 shall not be limited

7.5 Subject as expressly pr ovided in these Conditions all other warranties
conditions or terms w hether implied by statute or common law or ot herwise
are hereby excluded

7.6 If t he Company fail s to deliver the Goods for any reason other than any
cause beyond the Company’s reasonabl e control or the Buyer’s fault then the
Company shall only be liable to the Buyer for and the Company’s liability shall
be li mited to the excess (i f any) of the c ost to the Buyer (in the cheapest
available market) of similar goods to replace those not delivered over the Price
of the Goods

7.7 The Buyer shall examine all Goods delivered forthwith following delivery.
Any claim by the Buyer which is based on any defect in the quality or condition
of the Goods or their failure to correspond with specification shall (whether or
not delivery is refused by the Buyer) be notified to the Company within 7 days
from the date of delivery or (where the defect or failure was not apparent on
reasonable inspection) within a reasonable time after discovery of the defect
or failure If delivery is not refused and the Buyer does not notify the Company
accordingly the Buyer shal l not be entitled to reject the Goods and the
Company shall hav e no liability for such defect or failure and the Buyer shall
be bound to pay the Pr ice as if th e Goods had been delivered in accordance
with the Contract In no event shall the Buyer be entitled to reject th e Goods
on the basis of any defect or failur e w hich i s so slight that it would be
unreasonable for the Buyer to reject them

7.8 The Company shall be entitled to examine any Goods which are the subject
of any claim by the Buyer a nd to remove s uch Goods or a ny part thereof for
testing. No tests car ried out by the Buy er will be recognised by the Company
unless carried ou t strictly in accorda nce with a method previously agre ed by
the Company as being suitable for the purpose.

7.9 Where any valid claim in respect of any of the Goods which is based on any
defect in the quality or condition of the Goods or their failure to meet
specification is notifie d to the Company in accordance with these Conditions
the Company s hall be entitled to repair or replace th e Goods (or the part in
question) fre e of charge or at the Com pany’s sole discretion refund to the
Buyer the Pri ce (or a proportionate part of the Price) but the Company shall
have no further liability to the Buyer.

7.10 Where failed Goods a re returned to th e Co mpany an d subse quently
found to have no faul t found or failed due to reason(s) outside these terms
and conditions, the Company reserves the right to claim any subsequent costs
entailed, from the Buyer.

7.11 Without prejudice t o the provisions of clauses 7.5, 7.6, 7.7, 7.9 and 7.10
the entire liability of the Buyer under or in connection with th e Contract shall
not exceed the Price of the Goods.

7.12 Th e Company shall not be liable to the Buyer or be deemed to be in
breach of the c ontract by reason of any delay in p erforming or any fai lure to
perform any of the Company’s obligations in relation to the Goods if the delay
or failure was due to any cause b eyond the Company’s reasonable c ontrol
Without limiting the foregoing, the following shall be regarded as causes
beyond the Company’s reasonable control:

7.12.1 act of god, explosion, flood, te mpest, or inclement weather, fire or
accident;

7.12.2 war or threat of war , sabotage, insurrection, civil disturbance or
requisition;

7.12.3 acts, restrictions, regulations, by-laws, prohibitions or measures of a ny
kind on the part of any Governmental, Parli amentary or Local Authority;

7.12.4 imports or exports, regulations or embarg os;

7.12.5 strikes, lockouts or other industrial action or trade disputes (whether
employees of the Company or of a third party);

7.12.6 difficulties in obtaining raw materials , labour, fuel, parts or machinery;

7.12.7 power failure, failure of tele-comm unications lines, failure or
breakdown of plant, machinery or vehicles;

7.12.8 theft or malicious damage;

7.12.9 defaults for any reason whatsoever of s uppliers or sub-co ntractors of
the Company;

7.12.10 incompleteness or i naccuracy of any technical inf ormation which it is
the responsibility of the Buyer to provide

8. Insolvency of the Buyer

8.1 This clause applies if:

8.1.1 t he Buyer makes any composition or vol untary arrangemen t with its
creditors (being an individual or firm) becomes bankrupt or (being a company)
becomes subject to an administration order or seeks an out of court route into
administration or goes into liquidati on (otherwise than for the purposes of
amalgamation or reconstruction) or a moratorium comes into force in respect
of the Buyer (within the meaning of the Insolve ncy Act 1986); or

8.1.2 an encumbranc er takes possession or a receiver or manager or
administrative receiver or administrator is appointed of any of the property or
assets of the buyer; or

8.1.3 the Buyer ceases or threatens to cease to carry on business or

8.1.4 the Company reasona bly apprehends that any of the events mentioned
above is about to occur i n relation to the Buyer an d notifies the Buyer
accordingly

8.2 If this claus e applies then without prejudice to any ot her right or remedy
available to the Company th e Company shall be entitled to st op any Goods in
transit, cancel the Contract or suspend any further deliveri es under the
Contract without any li ability to the Buyer a nd if the Goods hav e been
delivered but not paid for the Price shall become immediately due and payable
notwithstanding any previous agreement or ar rangement to the contrary

9. Health and Safety Information
The Buyer agrees and u ndertakes with the Company to ensure that the
provisions of all instruction manuals including health and safety instructions
and any o ther informati on or document relating to the use of the Goods
provided by the Company with the Goods are fully i mplemented s o as to
ensure so far as is r easonably pra cticable that the Goods will b e safe and
without risk to health at all times, when i t is being installed, used, cleaned or
maintained by a person at work and t hat all such manuals instructions or
documents remain with the Goods.

10. General

10.1 The Contract is personal to the Buyer w hich may not assign or dispose of
any of its rights or obligations or otherwise delegate a ny of its obligations
under the Contract without the written conse nt of the Company.

10.2 The Company shall be entitled to assign its rights and obligations under
the Contract and t o sub-contract or oth erwise delegate any of its obligations
under the Contract.

10.3 Any notice required or permitted to be given by either party to the other
under these C onditions shall be in writing including a facsi mile addressed to
that other party at is registered offic e or principal place of business or such
other address as may at the relevant time have been notified pursuant to this
provision to the party giving the n otice and shall be deemed to have been
received by the party to whom it was addressed, if sent by facsimile upon its
transmission if during a normal b usiness day and otherwise on the n ext
business day and if sent by post, 72 hours after posting.

10.4 No wai ver by the Company of any breach of the Contract by the B uyer
shall be considered as a waiver of any subs equent breach of the sam e or any
other provision 10.5 If a ny provision of these C onditions is held by a Court or
other competent authori ty to be invalid or unenforceable in whole or in part
the validity of t he other provisions of these Conditions a nd the remainder of
the provision in question shall not be affected thereby

10.6 The C ontract a nd these Conditions shall be governed by the laws of
England

10.7 The parties hereby submit to the non-exclusiv e jurisdiction of the English
courts

10.8 The Buyer shall indemnify the Company for all costs a nd damages,
including attorneys’ fees, suffered by the Company as a r esult of the Buyers
actual or threatened breach of these terms and conditions.

11. Information
The Company will provide the Buyer on request wi th information as to the
proper and safe use of the G oods and th e Buyer shall at all times obey and
comply with t he Company’s instructions or other inf ormation relating to the
use of the Goods

Specific product warranty terms are available on request.

Terms & Conditions may change witho ut prior notice being g iven, for up to
date Terms please visit www.atagheating.co.uk .

Essential Cylinder Information

Maximum Water Supply Pressure – 16 Bar
Immersed Electric Element Rating – 3kW
Operating Pressure – 3 Bar
Expansion Vessel Charge Pressure – 3 Bar
Expansion Valve Setting – 6 Bar
Set Opening Pressure Of Combined T&P Valve – 7 Bar
Storage Capacity – See Cylinder Info Table
Mass Of Unit – See Cylinder Data Table
Immersion Heater Length – 14”
Maximum Primary Pressure (Indirect Only) – 3 Bar

Cylinder Data Table Capacity Weight (Kg) Empty

iSteel 90

iSteel 120

iSteel 150

iSteel 180

iSteel 210

iSteel 250

iSteel 300

47 Castle Street, Reading, Berkshire, RG1 7SR

Tel: [phone], Web: www.atagheating.co.uk

Direct 90 21

Indirect 88 27

Direct 120 25

Indirect 118 31

Direct 150 30

Indirect 148 35

Twin Coil 147 40

Direct 180 32

Indirect 178 39

Twin Coil 177 42

Direct 210 37

Indirect 208 44

Twin Coil 207 47

Direct 250 44

Indirect 248 50

Twin Coil 247 53

Direct 300 50

Indirect 298 57

Twin Coil 297 62

ATAG Heating Technology UK Ltd