Manual Ariston Pro 1 Eco (page 9 of 18) (English)

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cated 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 to be of metal.

2) Discharge pipes from the temperature & pressure relief and pressure relief valve may be joined together.

3) The pipe diameter must 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 9 m long.

i.e. Discharge pipes between 9 m and 18 m equivalent resistance length should be at least 2 sizes larger than the

nominal outlet size of the safety device. Between 18 m and 27 m at least 3 times larger, and so on.

Bends must be taken into account in calculating the ow resistance. See g.1 and Table 2.

4) The discharge pipe must have a vertical section of pipe at least 300 mm in length, below the tundish before any

elbows or bends in the pipe work.

5) The discharge pipe must be installed with a continuous fall.

6) The discharge must be visible at both the tundish and the nal point of discharge, but where this is not possible or

practically dicult; there should be clear visibility at one or other of these locations. Examples of acceptance are:

i) Ideally below a xed grating and above the water seal in a trapped gully.

ii) Downward discharges at a low level; i.e. up to 100 mm above external surfaces such as car parks, hard standings,

grassed areas etc. These are acceptable providing that where children may play or otherwise come into contact with

discharges, a wire cage or similar guard is positioned to prevent contact, whilst maintaining visibility.

iii) Discharges at high level; i.e. into a metal hopper and metal down pipe with the end of the discharge pipe clearly vis

ible (tundish visible or not). Or onto a roof capable of withstanding high temperature discharges of water 3 m from

any plastic guttering systems that would collect such a discharge (tundish visible).

3) The pipe diameter must be at least one pipe size larger than the nominal outlet size

of the safety device unless it’s total equivalent hydraulic resistance exceeds that of a

straight pipe 9 m long.

i.e. Discharge pipes between 9 m and 18 m equivalent resistance length should be at

least 2 sizes larger than the nominal outlet size of the safety device. Between 18

m and 27 m at least 3 times larger, and so on.

Bends must be taken into account in calculating the flow resistance.

See fi

g..5 and Table 2.

4) The discharge pipe must have a vertical section of pipe at least 300 mm in length,

below the tundish before any elbows or bends in the pipe work.

5) The discharge pipe must be installed with a continuous fall.

6) The discharge must 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 acceptance are:

i) Ideally belo

w a fixed grating and above the water seal in a trapped gully.

ii) Downward discharges at a low level; i.e. up to 100 mm above external surfaces

such as car parks, hard standings, grassed areas etc. These are acceptable providing

that where children may play or otherwise come into contact with discharges, a wire

cage or similar guard is positioned to prevent contact, whilst maintaining visibility.

iii) Discharges at high level; i.e. into a metal hopper and metal down pipe with

the

end of the discharge pipe clearly visible (tundish visible or not). Or onto a roof capable

600 mm Max.

300 mm

Min.

Temperature & pressure

relief valve

Metal discharge pipe (D1) from

temperature & pressure relief valve.

to tundish.

Metal discharge pipe (D2) from tundish

with continuous fall. See Table 2 and worked

example.

Tundish

Fixed grating

Trapped gulley

Discharge below

fixed grating.

(see page 6 for

alternative points

of discharge).

Fig.. 4

Suggest ways of terminating discharge pipes safely

42.0.01.07204.03 pag. 9-20.qxd:42.0.01.07204.01 pag. 9-20 7-10-2016 11:28 Pagina 15

iv) Where a single pipe serves a number of discharges, such as in blocks of ats, the number served should be limited to

no 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 large 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 oc

cupied by the blind, inrm or disabled people, consideration should be given to the installation of an electronically

How to adjust the temp as it keeps returning to full temp Submitted on 13-8-2022 at 11:02
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Ariston Pro 1 Eco User Manual - Dutch - 16 pages

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Ariston Pro 1 Eco Manual

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