Viessmann VITOCELL 100-V Manuel de service télécharger pdf (Page 19)

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Vitocell 100-V Installation Instructions

Set-up and Connections

Multiple Tank Set-up [only for 79 and 120 USG (300 and 450 L) capacities]

IMPORTANT

Two tanks, each with 79 USG (300 L) content, or up to

four tanks, each with 120 USG (450 L) content, may be

installed side-by-side.

The tanks are controlled via one DHW tank aquastat.

Individual control of tanks within the group of tanks is

therefore not possible.

If control of individual tanks within a group of tanks is

necessary, two alternatives exist. Either a 4-tank group

can be separated into smaller groups, i.e. two batteries

each consisting of two tanks (one DHW tank aquastat

controls each group), or all tanks should be installed

individually, i.e. individual tank set-up (one DHW tank

aquastat controls each tank).

1. Install aquastat in the boiler water supply of the last

tank receiving the boiler water in a group of tanks (see

illustration).

2. Install domestic cold and hot water header lines (see

illustration).

3. Install boiler water supply and return header lines (see

illustration).

4. Make final cold and hot water connections.

Both the boiler supply/return header and the domestic

hot/cold water header must be installed in a reverse

return method. This ensures uniform heating of all tanks

in the group. Header sizes for batteries up to four 79 to

120 USG (300 to 450 L) tanks are listed below.

5. Insulate header piping lines.

CAUTION

In commercial installations, we recommend the installation

of an additional high limit aquastat in the main discharge

pipe of domestic hot water from a group of tanks into

the system, and to wire this additional high limit aquastat

in series with the operating aquastat.

Legend

A Domestic hot water supply and T&P valve connection

B Boiler water supply

C Operating aquastat

D Boiler water return

E Domestic cold water

F Drain

G Air vent

Storage capacity / tank USG (L) 79 (300) 120 (450)

Number of tanks 2 2 3 4

Layout

33 33 333 3333

Connections (individual tank)

Heating water supply/return (common header size)

2 2 2

Domestic cold/hot water (common header size)

1a 1a 1b

Recirculation tapping

1 1 1 1

1 2 ... 14 15 16 17 18 19 20 21 22 23 24

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Viessmann VITOCELL 100-V Manuel de service Page 19

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