Ariston Unvented Hot Water Storage Cylinders User Manual

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Unvented Hot

Water Storage

Cylinders

Instructions for Installation, Servicing and Use

LEAVE THESE INSTRUCTIONS WITH THE END-USER

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Countr

y of destination:

GB/IE

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TABLE OF CONTENTS 1. GENERAL INFORMATION

1.1 DELIVERY

2. INSTALLATION

2.1 WATER REGULATIONS

2.2 BUILDING REGULATIONS

2.3 HOW THE APPLIANCE WORKS

2.4 OVERALL DIMENSIONS

2.5 COLD WATER SUPPLY

2.6 SITING AND FIXING

2.7 CONNECTION OF MAINS WATER SUPPLY

2.8 COLD WATER COMBINATION VALVE

2.9 CONNECTION TO SERVICES

2.10 SECONDARY RETURN

2.11 DISCHARGE PIPEWORK

2.12 ELECTRICAL DIAGRAMS

3. COMMISSIONING

4. MAINTENANCE

4.1 PROTECH ANTI-CORROSION SYSTEM

4.2 THERMAL CUT-OUT(S)

4.3 IMMERSION HEATER(S)

4.4 U

4.5 THERMOSTATS

4.6 MAINTENANCE

NVENTED CONTROLS

5. FAULT FINDING

6. TECHNICAL INFORMATION

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1. GENERAL INFORMATION

This manual is an integral and essential part of the product. It should be kept with the appliance so that it can be consulted by the user and our authorised personnel.

1.2 DELIVERY

Please read carefully the instr contained in this manual, as they provide important information regarding the safe installation, use and maintenance of the cylinder. Failure to do so may invalidate the guarantee.

The Ariston range is available in the following options:

The

Wall-hung ProTech range (50, 75, 100 litre models), which are supplied

as follows;

One box containing;

1) The cylinder with factory fitted temperature & pressure relief valve, immersion heater and thermostat with thermal cut-out.

One bo

1) Unvented control pack (expansion vessel, 2 piece cold water combination

The Contract ProTech floor-standing range (100, 125, 150, 200 and 300 litre models), which are supplied as follows;

One box containing;

1) The cylinder with factory fitted temperature & pressure relief valve.

x containing;

valve and tundish), instructions for installation, servicing and use and the Benchmar

k Log Book).

uctions and notices about the appliance

One box containing;

1) Unvented control pack (expansion vessel, 2 piece cold water combination valve and tundish), motorised valve (indirect only). Immersion heater(s) and thermostat(s) with thermal cut-out(s), cylinder thermostat with thermal cut-out (indirect only), feet (x3), instructions for installation, servicing and use and the Benchmark Log Book.

High Capacity ProTech floor-standing range (500 litre models), which

The are supplied as follows;

One box containing;

The cylinder with factory fitted temperature & pressure relief valve.

1) Unvented control pack (expansion vessel, 2 piece cold water combination

e (indirect only). Immersion heater(s)

alv

e and tundish), motor

alv

v and thermostat(s) with thermal cut-out(s), cylinder thermostat with thermal cut-out (indirect only), feet (x 3), instructions for installation, servicing and use and the Benchmark Log Book.

The

Classico and Primo floor-standing ranges (125, 150, 200 and 300 litre

models).

Are supplied with the f

One bo

1) The cylinder with factory fitted temperature & pressure relief valve.

x containing;

ollo

ised v

wing;

One bo

1) Unvented control pack (expansion vessel, 2 piece cold water combination

x containing;

valve and tundish), motorised valve (indirect only). Immersion heater(s) and ther ther servicing and use and the Benchmark Log Book.

mostat(s)

mal cut-out (indirect only), f

with ther

mal cut-out(s), cylinder ther

eet (x3), instr

uctions for installation,

mostat with

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2. INSTALLATION

2.1 WA

TER

REGULA

TIONS

2.2 BUILDING REGULATIONS

2.3 HOW THE APPLIANCE WORKS

These regulations (byelaws in Scotland) ensure a good supply of wholesome water, and that only approved materials, pipes and fittings are used to convey water.

These are a statutory document and take priority over all other regulations and recommendations. The installation of an unvented hot water storage cylinder is classified as a “Controlled Service” and Regulation G3 applies.To meet the requirements of the Regulation, installation of an unvented system should be undertaken by a “competent installer”. All installations of unvented hot water storage systems having a capacity of more than 15 litres should be notified to the relevant Local Authority by means of building notice or by the submission of full plans. It is important to note that it is a criminal offense to install an unvented hot water storage system without notifying the Local Authority. The installation of the unvented cylinder and hot water system must comply with BS 6700 and the HSE Legionella Code of Practice.

The immersion heater(s) are controlled through a thermostat which senses the water temperature. The operating temperature can be pre-set by adjusting the spindle in the head of the thermostat. In addition to the thermostat there is a thermal cut-out incorporated if the thermostat fails and the water temperature rises too high. Once the cut-out operates it can only be re-set manually after the fault has been rectified. Indirect models have dual thermal controls. In addition to the above there is a separate cylinder thermostat and thermal cut-out for controlling the indirect circuit. Again the thermal cut-out operates if the cylinder thermostat fails, by disconnecting the live feed (call for hot water) from the programmer.

Classico (STD/STI) models have magnesium anodes provided to prevent corrosion of the cylinder tank.

High Capacity (STD/STI) 500 litre models, Wall-hung (ST) units and the

All Contract (STD/STI) Floor-standing models utilise the ProTech anti-corrosion system (electronic anode).

The factory fitted temperature & pressure relief valve at the top of the cylinder is a safety device to back-up the thermostat(s) and thermal cutout(s). It works by sensing an excess in water temperature or pressure and releasing the hot water into a discharge tundish and drain. The cylinder will only work in the vertical position. The inlet pipe needs to deliver cold water to the bottom of the tank. When water is heated it expands. To accommodate this increase in volume an expansion vessel is provided. A cold water combination valve is also provided in two pieces, loose jointed for ease of installation. These comprise a combined line strainer/pressure reducing valve and core non-return valve/expansion relief valve. The strainer prevents any debris entering the other controls. The pressure reducer ensures the correct operation of the expansion vessel, and prevents any damage to the control valves through too great a pressure. The non-return valve ensures the water expansion is forced into the

xpansion v

e supply discharge tundish if the e

essel and pre

The e

xpansion relief v

ents contamination of the mains cold w

e will discharge e

alv

xpansion vessel fails.

xpanded w

ater to the

ater

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2.4 OVERALL DIMENSIONS

TABLE 1

Model Storage Units Pipe Size Coil Dimensions in mm Weight

Capacity Inlet Outlet m

DIRECT RANGE

Wall-hung

ST 50 ST 80

ST 100

Floor Standing

STD ProTech STD / STD ProTech / ITD 125 STD / STD ProTech / ITD 150 STD / STD ProTech / ITD 210 STD / STD ProTech / ITD 300

500 STD ProTech

INDIRECT RANGE

STI / STI ProTech / ITI 125 STI / STI ProTech / ITI 150 STI / STI ProTech / ITI 210 STI / STI ProTech / ITI 300

500 STI ProTech

*ITD Models **ITI Models

ech

ST ProT

50-80-100

50 l 75 l

100 l

100 l 125 l 150 l 200 l 300 l 495 l

125 l 150 l 200 l 300 l 495 l

1/2” 3/4” 3/4”

3/4” 3/4” 3/4” 3/4” 3/4"

1”

3/4” 3/4” 3/4” 3/4”

STD/STD ProT

125-150-200-300

Surface When Full

ABCDEFGH Kg

ech/ITD

0.75

0.9

1.5

410 590 550

530 700 840

990 1215 1390

700

840

990 1215 1390

STI/STI ProT

125-150-200-300

120 175 175

650 805

965 1280 1555

335

805

965 1280 1555

335

1045 1205 1525 1790 1870

ech/ITI

580 740 700

890

160 230 230

675 815 815 815 700

475

460

475

460

575

560

505

560

714

505

560

714

500 STD ProT

500 STI ProT

ech

265 265 265 265 275

265 265 265 275

225 225 225 225 255

225 225 225 255

77 115 141

129

158/138* 190/164* 245/220* 385/331*

630

166/143** 201/171** 256/227** 395/337**

641

2.5 COLD WATER SUPPLY

It is important to ensure that the cold water main is capable of supplying the increased demand which will be imposed on it.

Hot and cold w

ater are both drawn off the same source of supply. Remember, there will not be a storage tank to help compensate for variations in the demand on the system. A minim

um pressure of appro

required f

or satisf

actor

ximately 1.5 bar and 20 litres per min

y oper

85% of UK dw

ation.

ellings ha

ve a mains

pressure above 2.0 bar.

Y MUST NOT EXCEED 16 BAR.

ed until it is time to install.

When unpacking

2.6 SITING AND FIXING

TER SUPPL

NOTE:

THE MAINS

The cylinder should be left pac the appliance follow the guidelines within the packaging and take care not to damage the temperature and pressure relief valve. The cylinder ma

y be installed at any convenient position, as it is connected to the mains cold water supply, it is equally effective on any floor, however, consideration must be given to allow ease of access for maintenance purposes.

ver, do not install the unit in premises which may be subject to

Ho freezing. Ensure that the floor load bearing strength is adequate to take the weight of the cylinder when full of water (see The ST50, ST80 and ST100 ProT

ech

TABLE 1).

models are w

all mounted. All other models are free standing. These are supplied with feet which are attached to the heater via self-tapping screws which are also supplied. All units must be installed in the VERTICAL POSITION. For maintenance purposes leave at least 500 mm free space in front of the

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unit, for access.

ute is

SECONDARY

RETURN

COMBINATION V

ALVE

EXPANSION RELIEF

PIPE

COLD

AINS-IN 22mm

DRAIN

XPANSION

VESSEL

PRESSURE + TEMPERATURE RELIEF VALVE

HOT SUPPLY

22mm

TUNDISH

22mm

MAX. 100mm

COMBINATION

ALVE

EXPANSION

RELIEF

IPE

COLD

MAINS-IN

15/22mm

EXPANSION VESSEL

RESSURE + TEMPERATURE

RELIEF VALVE

HOT SUPPLY

15/22mm

TUNDISH

15mm

22mm

MAX. 100mm

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2.7 CONNECTION OF MAINS WATER SUPPLY

For floor standing models: On the front of the unit there is a label to identify the connection por Please check this before making any connection to the unit.

For units up to 300 litres it is recommended that all mains cold water supply pipe work is a minimum of 22mm, with the exception of model ST 50 ProTech where 15mm can be used. For 500 litre models the supply should be 28mm. supply and the cylinder f

An isolating valve should be installed between the cold water

or servicing. ALL PIPEWORK MUST BE FLUSHED

TO AVOID DAMAGE TO THE CONTROL VALVES.

ts.

ROTECH 50-80-100

ST P

Please refer to

FIGS. 2.1, 2.2, 2.3, 2.4, 2.5 for a suggested installation layout.

STD PROTECH 100

STD/STD PROTECH/ITD 125-150-210-300 DIRECT

FIG. 2.1

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FIG.

2.2

RETURN

FLOW

SECONDARY

RETURN

COMBINATION VAL

EXPANSION RELIEF

PIPE

COLD

MAINS-IN

22mm

DRAIN

EXPANSION VESSEL

PRESSURE + TEMPERATURE RELIEF VALVE

ZONE

VALVE

HOT SUPPLY

22mm

TUNDISH

22mm

MAX. 100mm

SECONDARY

RETURN

COMBINATION VALVE

EXPANSION RELIEF

PIPE

COLD

MAINS-IN

28mm

DRAIN

EXPANSION

ESSEL

RESSURE + 

TEMPERATURE

RELIEF VALVE

HOT SUPPLY

8mm

TUNDISH

22mm

MAX. 100mm

RETURN

FLOW

SECONDARY

RETURN

OMBINATION

VALVE

EXPANSION RELIEF

PIPE

COLD

MAINS-IN

28mm

DRAIN

EXPANSION

ESSEL

PRESSURE + 

TEMPERATURE

RELIEF VALVE

ZONE VALVE

HOT SUPPLY

28mm

TUNDISH

22mm

MAX. 100mm

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STI/STI PROTECH/ITI 125-150-210-300 INDIRECT

500 STD PROTECH

FIG. 2.3

500 STI PROTECH

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FIG.

FIG. 2.4

2.5

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2.8 COLD WATER COMBINATION VALVE

The cold w

ater combination valve can be connected either close by

the unit or alter

natively it may be installed in a remote position from the unit as there is no requirement to site it in close proximity to the cylinder. This allows a flexible and convenient installation. However, it is important to note allowances for the discharge pipe work from the e

xpansion relief valve must be accounted for.

A balancing port is supplied on the 22mm valves (for units above 50 litres) and 28mm valves (for 500 litres units) allowing balanced cold water supply to the rest of the building giving constant results for mixer and shower valves. If the facility is not needed a plug is supplied. Refer to

FIG. 2.7 and FIG. 2.8

Although this facility is not built into the 15mm valve (supplied with model ST50), a tee piece may be inserted between the two components giving the same result. Refer to

OTE!

HERE SHOULD BE NO OTHER VALVES FITTED BETWEEN THE CYLINDER AND

EXANSION VALVE

THE

FIG. 2.6

SERVICEABLE 1/2” PRESSURE

REDUCING CARTRIDGE AND

LINE STRAINER

15mm COLD MAINS IN

NON-RETURN

VALVE (WITHIN HOUSING)

TEE PIECE

FOR BALANCED

COLD WATER

TAKE OFF

(NOT SUPPLIED)

EXPANSION RELIEF

VALVE (SET AT 6 BAR)

. CONNECTIONS

3/4” FOR EXPANSION VESSEL

15mm

TO CYLINDER

FIG. 2.6

For Model ST 50

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