Installation and maintenance instructions - Adveco · PDF fileinclude an air gap and tundish,...

P R A C T I C A L , E F F I C I E N T & S U S T A I N A B L E B U I L D I N G S E R V I C E S S O L U T I O N S

Installation and maintenance instructions

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Mild Steel System TanksMSS 800-10000 Range

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2MSS Mild Steel Buffers - Installation and maintenance instructions

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Contents

Introduction

Installation1. Responsibilities

2. Location

3. Tank Connections

4. Installation Procedure

5. Discharge Pipework

Maintenance Operations

1. Maintenance Demand

2. Maintenance Checks

3. Drainage Procedure

General Specification: MSS 800-5000


Contact Details

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Adveco Range of Mild Steel BuffersThe MSS range is designed, manufactured, and tested in the EU to the requirements of:

The Pressure Equipment Directive 97/23/EC Article 3, Paragraph 3, Sound Engineering Practice

Installation1. ResponsibilitiesIn compliance with the procedures and advice contained within this manual, responsibility lies with the installer to ensure that the vessels are safely installed and with the user to maintain a safe standard of operation.

This includes ensuring that the unit is not operated at temperatures or pressures in excess of those specified on the vessel data plate. Neither should the vessel be exposed to a full or partial vacuum, such as can be present during draw-off or drainage of the unit while the return feed or vent are closed or obstructed.

2. LocationThe vessel must be located inside the building and positioned on a level base capable of supporting the unit when full. The total filled weight of a unit is equivalent to the sum of the empty weight of the vessel plus the water volume in litres of the tank (see p.8-9), where 1L of water weighs 1kg.

An installation should provide suitable clearances of no less than 500mm around the unit in order to give access for removal and replacement of ancillaries. Consideration should be given to the eventual replacement of the entire vessel.

All tanks are provided with a 100mm insulation jacket as standard. This can be easily removed via zipper if necessary to manoeuvre the vessel into location, however must be replaced before the cylinder is connected to pipework.

500mm

500mm

500mm500mm

Installation3. Tank Connections

mc Connection to primary heat source

mi Connection to heatingrp Return from heatingri Extra return from heating

Connection sizes listed on p.8-9

rc Return to primary heat source

sa Automatic air ventsd Sensor, probe, thermostat connections g Extra flow and return connectionsg1 Extra flow and return connection

MSS 800-5000 MSS 6000-10000

sc Drain location



Installation4. Installation ProcedureIsolation valves should be fitted to the vessel (excluding on connections to the vent or any pressure relief valves) prior to installation of its connections. All pipework should be of an appropriate, non-corrosive material, and should be supported outside the vessel. All flanged connections to the vessel must be tightened in a diametrically opposed sequence to prevent uneven loads across the connection. Any sealant compounds used on screwed connections must be approved for use with potable water by the local water authority.

The MSS range requires a top-mounted automatic air vent designed to facilitate the release of air from sealed systems during filling and standard operation. A manual air vent should be installed in addition to this feature. Discharge pipework from pressure relief valves should terminate at a safe disposal location, be easily visible, and include an air gap and tundish, as outlined on page 6. Expansion vessels installed on sealed systems must be positioned on the return side, or on the vent side for non-sealed/vented systems, and should be sized to be approximately 10% of the total system volume. Contact the Adveco Engineering Department for a full calculation.

A drain should be installed on the lowest point of the return feed before the connection to the cylinder. The drain valve should be of suitable size to allow draining of the tank in a reasonable amount of time. It is recommended that a quarter-turn lever valve and plug or cap are used and that the valve size be one size smaller than the return feed connection size. A suitable drain or gulley should be provided to allow draining of the tank.


Installation5. Discharge Pipework

Discharge from relief valves.

Discharge pipework requirements are found in Building Regulation Part G. They are summarised here but it is recommended to read the regulations in full at http://www.planningportal.gov.uk/buildingregulations/approveddocuments/partg/approved

D1, the pipe from the relief valve to the air break, must have the same diameter as the valve, must be metal, and must be no longer than 600mm.

An airbreak, such as a tundish or a funnel, must be installed at the end of D1.

D2, the pipe from the air break to termination, must be at least one size larger than D1, must have at least 300mm vertical drop before a bend, and must have a continuous fall. It should typically be metal, but PP is acceptable (note: PP is push fit plastic. ABS and PVC solvent weld are not suitable.)

If D2 is longer than 9m total equivalent length (based on 1.4m per bend) then the diameter must be increased. Please refer to Building Regulation G3 at http://www.planningportal.gov.uk/buildingregulations/ If a number of D2 pipes are combined the diameter of the common pipe should be one size larger than the biggest D2 pipe.

D2 should be terminated in one of the following ways:• Into a soil stack, suitable for the temperature, with a mechanical seal, and with no sanitary appliances on it and a

warning not to use the pipe for sanitary appliances.

• Into a trapped gulley with the pipe end below the grate but above the water seal.

• Terminating at low level to a suitable external ground level surface with a guard around the pipe end and thatend within 100mm of the ground

• At high level into a suitable hopper or onto a roof that can withstand the temperature and does not have plasticguttering within 3m of the discharge and does not create a risk to people below.



Maintenance Operations

1. Maintenance Demand

Hot water system maintenance should be determined by the building’s risk assessment and legionella protection policy. Full maintenance and cleaning procedures should be carried out by a trained operative, however more frequent basic hot water system maintenance can be done by the building controller’s nominated person. This includes monthly checks of the hot water temperature and regular flushing of low use outlets.

The full maintenance regime of an indirect tank will vary from site to site depending on water conditions and use. Maintenance must take place at least annually, but more frequent visits may be required depending on the condition of the unit after one year.

2. Maintenance Checks

Checks to carry out:

Control stat is calibrated and correctly shuts off heat source.

Overheat stat is functional and stops heat to the tank.

Relief valves operate and discharge correctly.

Expansion vessel pressure is equal to the cold fill pressure (checked when there is no pressure on the water side of the diaphragm). Recharge as appropriate.

All valves travel free.

The system has no leaks. Particular attention should be paid to tank connections and air relief valves.

The system is correctly dosed with inhibitors.

3. Drainage Procedure

Isolate all connections to the vessel and turn off any system pumps. For sealed systems, open the safety valve to release latent vessel pressure (some discharge is to be expected) and operate the manual air vent to allow intake of air into the unit during drainage. For vented systems isolate the vessel from the common vent and instead vent to atmosphere through the 3-port valve. Ensure the drain valve is positioned over, or piped into, a drain or a gulley. Open the valve and allow the vessel to fully drain.



mig

sa

sd

sd

sd

mc

g

g

sdri

rprc

A B C E F

DeDi

G

Port Purpose size: 800 1000 1500 2000 3000 4000 5000mc 1.25 1.5 1.5 2 3 3 3rc 1.25 1.5 1.5 2 3 3 3mi 1.25 1.5 1.5 2 3 3 3rp 1.25 1.5 1.5 2 3 3 3ri

1.25 1.5 1.5 2 3 3 3sa 1 1 1 1 1 1 1sd 0.5 0.5 0.5 0.5 0.5 0.5 0.5g

Flow from heat source Return to heat source Flow to system Return from system Extra return from system Drain outlet Automatic air vent Sensors Extra flow and return connections 1.25 1.25 1.25 1.25 1.25 1.25 1.25

MSS MSS MSS MSS MSS MSS MSS



Dimensions are in millimetres

Model De Di Litres A B C E F MSS800 990 790 800 1740 1370 945 320 610 1220 115MSS1000 1050 850 1000 2030 1640 1080 340 880 1490 135MSS1500 1200 1000 1500 2120 1685 1105 385 925 1535 170MSS2000 1300 1100 2000 2450 2000 1275 400 1240 1850 240MSS3000 1450 1250 3000 2810 2195 1525 455 1315 1925 300MSS4000 1600 1400 4000 2900 2285 1485 485 1455 2065 450MSS5000 1800 1600 5000 2960 2400 1600 600 1590 2200 580

Dimensions are in inches BSPEmpty

G Weight (kg)

1.25 1.5 1.5 2 3 3 3sc


Port Purpose size: 6000 8000 10000mc 3 3 3rc 3 3 3mi 3 3 3rp 3 3 3ri 3 3 3

sa 1 1 1sd 0.5 0.5 0.5g

Flow from heat source Return to heat source Flow to system Return from system Extra return from system

Drain outlet Automatic air vent Sensors Extra flow and return connections Extra flow and return connection

1.25 1.25 1.25

Dimensions are in millimetres

Model De Di Litres A B C E F H Empty

Weight (kg)MSS6000 2000 1800 6000 2790 2195 1675 1415 1155 635 620MSS8000 2000 1800 8000 3490 2905 2145 1615 1385 625 755MSS10000 2000 1800 10000 4240 3655 2645 2365 1635 625 895

MSS MSS MSS

g1 1.5 1.5 1.5

Dimensions are in inches BSP

3 3 3sc


Adveco LtdUnit 7&8 Armstrong Mall, Southwood Business Park, Farnborough, Hampshire GU14 0NR T : 01252 551 540 [email protected] www.adveco.co.uk

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