Technical data

ManualsBrandsAriston ManualsDomestic AppliancesSTD 210 DIRECT

UNVENTED MAINS PRESSURE WATER HEATERS

120, 150, 170, 210, 250 and 300 LITRE CAPACITY INDIRECT MODELS

INSTALLATION AND SERVICING INSTRUCTIONS

PACK CONTENTS

The CENTERSTORE unvented cylinder water heater incorporating immersion heater(s) and thermal

controls l Factory ﬁ tted temperature/pressure relief valve l Cold water combination valve assembly

l Expansion vessel and mounting bracket l Tundish l Motorised valve l Compression nuts and olives

l Immersion heater spanner l Installation instructions

IMPORTANT: PLEASE READ AND UNDERSTAND THESE INSTRUCTIONS

BEFORE COMMENCING INSTALLATION. PLEASE LEAVE THIS MANUAL

WITH THE CUSTOMER FOR FUTURE REFERENCE.

INTRODUCTION

The CENTERSTORE cylinder is a purpose designed un-

vented water heater. The unit has a stainless steel inner

vessel, which ensures an excellent standard of corrosion-

resistance. The outer casing is a combination of resilient

thermoplastic mouldings and plastic coated corrosion

proofed steel sheet. All products are insulated with CFC

free polyurethane foam to give good heat loss

performance. ( See Table 6 )

The unit is supplied complete with all the necessary

safety and control devices needed to allow connection

to the cold water mains. All these components are preset

and not adjustable.

NOTE: Prior to installation the unit should be stored

in an upright position in an area free from excessive

damp or humidity.

This appliance complies with the requirements of

the CE marking directive and is Kiwa approved to

show compliance with Building Regulations (Sec-

tion G3).

The following instructions are offered as a guide to

installation which must be carried out by a compe-

tent plumbing and electrical installer in accordance

with Building Regulation G3, The Building Standards

(Scotland) Regulations 1990, or The Building Regula-

tions (Northern Ireland).

THE BENCHMARK SCHEME

Benchmark places responsibilities on both manufacturers and installers. The purpose is to ensure that custom-

ers 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 Bench-

mark Code of Practice which is available from the Heating and Hotwater Industry Council who manage and

promote the Scheme. Visit www.centralheating.co.uk for more information.

IMPORTANT NOTE TO USER: PLEASE REFER TO THE USER INSTRUCTIONS SECTION ON PAGES 13 AND 14 FOR IM-

PORTANT INFORMATION WITH RESPECT TO THE BENCHMARK SCHEME

Summary of content (20 pages)

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UNVENTED MAINS PRESSURE WATER HEATERS 120, 150, 170, 210, 250 and 300 LITRE CAPACITY INDIRECT MODELS INSTALLATION AND SERVICING INSTRUCTIONS PACK CONTENTS The CENTERSTORE unvented cylinder water heater incorporating immersion heater(s) and thermal controls l Factory fitted temperature/pressure relief valve l Cold water combination valve assembly l Expansion vessel and mounting bracket l Tundish l Motorised valve l Compression nuts and olives l Immersion heater spanner l Installation instructions IMPORTANT:
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Contents PAGE INTRODUCTION.................................................................1 GENERAL REQUIREMENTS.............................................3 INSTALLATION-GENERAL...............................................4 INSTALLATION...................................................................10 COMMISSIONING.............................................................12 MAINTENANCE..................................................................12 USER INSTRUCTIONS.........................
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IMPORTANT: THIS APPLIANCE IS NOT INTENDED FOR THE USE BY PERSONS (INCLUDING CHILDREN) WITH REDUCED PHYSICAL, SENSORY OR MENTAL CAPABILITIES, OR LACK OF KNOWLEDGE AND EXPERIENCE, UNLESS THEY HAVE BEEN GIVEN SUPERVISION OR INSTRUCTION CONCERNING THE USE OF THE APPLIANCE BY A PERSON RESPONSIBLE FOR THEIR SAFETY. CHILDREN MUST BE SUPERVISED. GENERAL REQUIREMENTS SITING THE UNIT The CENTERSTORE cylinder must be vertically floor mounted.
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OPERATIONAL SUMMARY Maximum mains pressure Operating pressure Expansion vessel charge pressure Expansion relief valve setting T&P relief valve setting Maximum primary circuit pressure Storage capacity Weight when full 16 bar 3.5 bar 3.5 bar 6 bar 90°C/10 bar 3 bar See Table1 See Table1 Fig. 2: Cold water combination valve assembly INSTALLATION – GENERAL (SEE FIGS. 2 - 6) PIPE FITTINGS All pipe fittings are made via 22mm compression fittings directly to the unit.
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OUTLET The hot water outlet is a 22mm compression fitting located at the top of the cylinder. Hot water distribution pipework should be 22mm pipe with short runs of 15mm pipe to terminal fittings such as sinks and basins. Pipe sizes may vary due to system design. Fig. 3: Secondary circulation connection Fig. 4 General dimensions NOMINAL CAPACITY (litres) DIMENSIONS (mm) A B C D COIL RATING RECOVERY (kW) (mins) HEATING TIME DIRECT (mins) 120 315 364 615 906 12.
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DISCHARGE PIPEWORK 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 and discharge pipes should be fitted in accordance with the requirements and guidance notes of Building Regulation G3. The G3 Requirements and Guidance section 3.9 are reproduced in the following sections of this manual. Information Sheet No.
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Worked example of discharge pipe sizing Fig. 5: shows 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 3: Maximum resistance allowed for a straight length of 22mm copper discharge 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.
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VALVE OUTLET SIZE MINIMUM SIZE OF DISCHARGE PIPE D1 MINIMUM SIZE OF DISCHARGE PIPE D2 FROM TUNDISH MAXIMUM RESISTANCE ALLOWED, EXPRESSED AS A LENGTH OF STRAIGHT PIPE (I.E. NO ELBOWS OR BENDS RESISTANCE CREATED BY EACH ELBOW OR BEND G 1/2 15MM G 3/4 22MM G1 28MM 22mm 28mm 35mm 28mm 35mm 42mm 35mm 42mm 54mm UP TO 9M UP TO 18M UP TO 27M UP TO 9M UP TO 18M UP TO 27M UP TO 9M UP TO 18M UP TO 27M 0.8M 1.0M 1.4M 1.0M 1.4M 1.7M 1.4M 1.7M 2.
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EXPANSION VESSEL T&P RELIEF VALVE BALANCED COLD WATER CONNECTION (IF REQUIRED) COLD WATER COMBINATION VALVE (2-PIECE) MAINS WATER SUPPLY TO HOT OUTLETS ISOLATING VALVE (NOT SUPPLIED) ELEMENT / CONTROLS HOUSING PRIMARY RETURN TUNDISH PRIMARY FLOW DRAIN COCK (NOT SUPPLIED) INLET DISCHARGE PIPE SECONDARY RETURN TAPPING (IF REQUIRED) NOT SUPPLIED Fig.
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INSTALLATION PLUMBING CONNECTIONS CENTERSTORE cylinders require the following pipework connections. • Cold water supply to and from inlet controls. • Outlet to hot water draw off points. • Discharge pipework from valve outlets to tundish • Connection to the primary circuit. All connections are 22mm compression. However, 3/4”BSP parallel threaded fittings can be fitted to the primary coil connections if required. ELECTRICAL SUPPLY (FIG.
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Fig. 8: Schematic wiring diagram - Basic 2 x 2 port valve system Fig. 9: Schematic wiring diagram - 3 port mid position valve system. N.B.
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COMMISSIONING At the time of commissioning, please ensure all relevant sections of the Benchmark Checklist, located on Page 17 and 18 of this document, are completed. FILLING THE UNIT WITH WATER • Check expansion vessel pre-charge pressure. The vessel is supplied precharged to 3.5 bar to match the control pressure of the pressure reducing valve.The precharge pressure is checked using a car tyre gauge by unscrewing the plastic cap opposite the water connection.
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STRAINER Turn off the cold water supply, boiler and immersion heaters. The lowest hot water tap should then be opened to de-pressurise the system. Remove the pressure reducing cartridge to access the strainer mesh. Wash any particulate matter from the strainer under clean water. Re-assemble ensuring the seal is correctly fitted. DO NOT use any other type of sealant. DESCALING IMMERSION HEATER(S) Before removing the immersion heater(s) the unit must be drained.
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optimise its safety, efficiency and performance. The service engineer should complete the relevant Service Record on the Benchmark Checklist after each service. The Benchmark Checklist may be required in the event of any warranty work and as supporting documentation relating to home improvements in the optional documents section of the Home Improvements Pack. TEMPERATURE CONTROLS (Fig. 7) The CENTERSTORE cylinder units are fitted with an indirect thermostat and thermal cut-out.
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3 11 18 22 2 19 16 15 18 1 3 20 Fig. 11: Spares Diagram 1 D e s c r ip t io n Imme r s io n h e a t e r P a r t No . 95 606 961 2 3 4 5 6 7 Imme r s io n Imme r s io n Imme r s io n T u n d is h E x p a n s io n E x p a n s io n 95 95 95 95 95 95 8 C o ld w a t e r c o mb in a t io n v a lv e c o mp le t e 95 605 047 9 C o ld w a t e r c o mb in a t io n v a lv e b o d y 95 605 048 P r e s s u r e r e d u c in g v a lv e c a r t r id g e 3.
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FAUL T P O S S IB L E C A U S E 1. M a in s s u pp ly o ff. R E M E DY 1 . C h ec k and op en s top c oc k . 2 . Turn o ff w a ter s u pp ly . R em ove s tra in er a nd c le an (s ee M ainten an c e s ec tion ). 3 . C h ec k and refit as re qu ired . 2. S tra in er bloc k e d. N o ho t w ate r flow 3. C old W ater C om bination V alve inc orrec tly fitted . 1. B A C K U P im m e rs ion h ea te r 1 . C h ec k and s w itc h o n. no t s w itc hed on. 2. B A C K U P im m e rs ion h ea te r 2 . C h ec k .
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GUARANTEE The CENTERSTORE stainless steel vessel carries a full 25 year parts guarantee against faulty manufacture or materials provided that: • It has been correctly installed as per the instructions contained in the instruction manual and all relevant Codes of Practice and Regulations in force at the time of installation. • The Benchmark Checklist has been completed upon commissioning and the Benchmark Service Record is completed for each service.
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TECHNICAL SUPPORT & SPARES For all technical support, replacement parts and service issues please contact: CENTERSTORE Brooks House, Coventry Road, Warwick, CV34 4LL Tel: 0844 871 1532 The policy of CENTERSTORE is one of continuous product development and, as such, we reserve the right to change specifications and guarantee terms and conditions without notice.