Vaillant ecoTEC plus 937 Service Manual download pdf (Page 28)

28 Installation and maintenance instructions ecoTEC plus 937 0020031552_06

Push the union nut (4) with the inserted olive (3)

onto the copper tail (5) included with the combi

boiler. The diameter of this pipe is 15 mm.

Insert the copper tail into the cold water isolating

valve up to the stop. Tighten the union nuts in this

position.

Insert the fibre seal (7) and screw the copper tail (6)

which is included with the storage tank module, to

the hot water connection on the unit. The diameter of

this pipe is 15 mm.

Fit the handle for the filling loop to the cold water

stop valve (2) with a countersunk screw.

To operate a circulation pump, we recom-

mend using the accessory set

Item. no. 0020057235.

Using a circulation pump negatively affects

hot water comfort, as it causes turbulence

and disrupts the stratification in the tank.

Limit the flow rate of the circulation pump in order to

prevent the hot water supply from being negatively

affected.

Using a circulation pump increases energy

consumption.

5.13 Connecting piping between the stratified

storage tank and the combi-heater

Fig 5.8 Piping between shift load storage tank and combina-

tion boiler

Remove the pipe sections (1), (2), (3) and (4) with the

associated fibre seals from the box of accessories of

the shift load storage tank.

Fit the formed pipe and straight pipe sections in the

correct sequence.

The formed pipes (1) and (2) must be fitted

first.

5 Sequence of operations during installation

1 2 ... 23 24 25 26 27 28 29 30 31 32 33 ... 79 80

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Vaillant ecoTEC plus 937 Service Manual Page 28