Vaillant Flue pipe Specifications download pdf (Page 17)

17Instructions for installation and servicing ecoTEC 839592_12

Vessel Volume [L]

Initial system pressure (bar) 1.0 1.5

Pressure relief valve setting (bar) 3.0

Total water content of system litres

25 2.7 3.9

50 5.4 7.8

100 10.9 15.6

125 13.6 19.5

150 16.3 23.4

175 19.1 27.3

200 21.8 31.2

225 24.5 35.1

250 27.2 39.0

275 30.0 42.9

300 32.7 46.8

325 35.7 50.7

350 38.1 54.6

375 40.9 58.5

400 43.6 62.4

425 46.3 66.3

450 49.0 70.2

475 51.8 74.1

500 54.5 78.0

For system volumes other than those given

above, multiply the system volume by the

factor across

0.109 0.156

Table 3.7 Sizing of additional expansion vessel

3.11 Pump specifications

3.11.1 Circulating pump

only ecoTEC plus:

The circulating pump is included in the boiler. The residual

pump discharge height depending on the by-pass valve is

shown in Fig. 3.10.1 (ecoTEC plus) and 3.10.2 (ecoTEC plus

637 / 837).

The operating mode of the 2-step pump can be adjusted

below the diagnosis number “d.19”, see section 8.1.2.

400

300

200

100

0 200 400 600 800 1000 1200 1600

Lift

[

mbar

]

Volumeflow

[

l/h

]

1800

1400

2. Step1. Step

Fig. 3.10.1 Pump specifications ecoTEC plus

(except ecoTEC 637 and 837)

400

300

200

100

0 200 400 600 800 1000 1200 1600

Lift

[

mbar

]

Volumeflow

[

l/h

]

18001400

2. Step1. Step

2000

Fig. 3.10.2 Pump specifications only ecoTEC 637 and 837

only ecoTEC pro:

The circulating pump is included in the boiler. The

ecoTEC pro appliances are fitted with a single-stage

pump. The residual pump discharge height depending on

the by-pass valve is shown in Fig. 3.11.

400

300

200

100

0 200 400 600 800 1000 1200 1600

Lift

[

mbar

]

Volumeflow

[

l/h

]

1800

1400

Fig. 3.11 Pump specifications ecoTEC pro

3.11.2 System by-pass

An automatic system by-pass is provided in the boiler.

The boiler is suitable for use in systems with

thermostatic radiator valves and no additional by-pass

is required. The by-pass valve is adjustable, see section

5.3.

3.11.3 Venting

The boiler is fitted with an automatic air vent. Additional

provision should be made to enable the heating system

to be vented during filling and commissioning either by

automatic air vents or manually.

3.12 Condensate trap

The boiler is fitted with a siphonic condensate discharge

(ecoTEC plus) or a condensate trap (ecoTEC pro)

incorporating a water trap of 140 mm.

General requirements 3

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