Vaillant ecoTEC plus 937 Service Manual download pdf (Page 45)

Installation and maintenance instructions ecoTEC plus 937 0020031552_06 45

The setting mode is also de-activated if a button is

not pushed within a period of 4 minutes.

Appliance Heating output in kW

ecoTEC plus 937 12 - 28

Table 6.3 Setting the part load ranges of the heating system

6.12 Converting the gas type

To convert the appliance from natural gas to

liquid gas you will need the Vaillant modifica-

tion kit Part No. 00 2001 0641.

To convert the appliance from liquid gas to natu-

ral gas you will need the Vaillant modification

kit Part No. 00 2001 0642.

Perform the conversion of the appliance in

accordance with the description in the modi-

fication set.

7 Commissioning Part II: Functional

checks

7.1 Functional checks

7.1.1 Method of procedure

After installing and setting the gas, perform a function

check before commissioning the appliance and handing

over to the user.

Commission the appliance in accordance with the

instructions in the relevant operating manual.

Check the gas supply pipework, the flue system, the

heating system and the hot water pipework for leaks.

Check that the flue system is properly fitted in

accordance with the installation instructions for the

flue system.

Check the ignition and whether the burner is showing

a consistent flame picture.

Carry out a function check of the heating system (see

Section 7.1.2) and the hot water preparation (see Sec-

tion 7.1.3).

Hand over the appliance to the user (see Section 7.2).

Fig. 7.1 Function check

7.1.2 Heating

Switch on the appliance.

Make sure that there is a heat demand.

Press "i" to activate the status indicator.

As soon as there is a heat demand the display runs

through status indications "S. 1" to "S. 3", until the

appliance is running properly in normal operation and

the display shows "S. 4".

Commissioning, Part I 6

Commissioning Part II: Functional checks 7

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Vaillant ecoTEC plus 937 Service Manual Page 45

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