Vaillant ecoMAX 613/2 E Service Manual download pdf (Page 35)

Commissioning Part I 5

Instructions for installation and servicing ecoMAX 35

5.9 Adjusting pump speed

5.9.1 ecoMAX 613/2, 618/2, 622/2, ecoMAX 824/2,

828/2

The units are fitted with a two–speed pump. The pump is

delivered with the switch (1) set to position III.

Important note (ecoMAX 824/828 only):

The boiler should only be operated at pump set-

ting III as the heating capacity for hot water is

reduced when operated at pump setting II.

It is possible, however, to change the pump set-

ting from Level III to Level II manually when

there is noise coming from the heating system.

Fig. 5.2 Pump specifications ecoMAX 613/2, 618/2, 622/2,

824/2, 828/2

5.9.2 ecoMAX 635, 835

The ecoMAX 635, 835 are fitted with an automatic

modulating pump which regulates according to the resi-

stance of the heating circuit.

Within the diagnostic system (see next page) it is possi-

ble to preset the pump to five resistance persentage

steps up to the maximum available output in 53, 60, 70,

85 and 100 %. Therefore when using this selection opti-

on the automatic modulation is switched off.

Note:

Where a mixing valve is fitted in the heating cir-

cuit (underfloor heating circuit) the pump set-

ting in the diagnostic mode (d.14) should be set

to 100%.

Fig. 5.3 Pump specifications ecoMAX 635, 835

Modulating pump settings (ecoMAX 635, 835 only)

In order to set the pump from modulating to a number

of fixed persentage output values, please follow the

instruction below.

• Open the appliance to obtain access to the diagnostic

display.

• Turn the appliance ”on/off”–contol to the ”I”–position

(”on”).

1 Press the ”i” and ”+” buttons below the display simul-

taneously. The display will now show ”d.0”. Use the

”+” button to scroll up to ”d.14”.

2 Press the ”i”–button to display the diagnostic informa-

tion (e. g. factory setting ”auto” = pump modulation on).

3 Press the ”+” or ”–” button to select the pump resi-

stance value (0 = auto, 1 = 53%, 2 = 60%, 3 = 70%, 4

= 85%, 5 = 100% these figures represent the percen-

tages of the maximum pump output).

400

300

200

100

0 200 400 600 800 1000 1200 1600

Lift

[

mbar

]

1800

Volumeflow

[

l/h

]

1900

1400

100 %

53 %

60 %

70 %

85 %

400

300

200

100

0 200 400 600 800 1000 1200 1600

Lift

[

mbar

]

1800

1400

Position III

Position II

Volumeflow

[

l/h

]

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Vaillant ecoMAX 613/2 E Service Manual Page 35

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