Circulating Pump; System By-Pass; Venting - Vaillant 824/2 E Instructions For Installation Manual

4 General Requirements
Initial system pressure (bar)
Pressure relief valve setting (bar)
Total water content of system ltres
25
50
100
125
150
175
200
225
250
275
300
325
350
375
400
425
450
475
500
For system volumes other than those given
above, multiply the system volume by the
factor across

4.8.6 Circulating pump

The circulating pump is included in the boiler. The pump
head available for the heating system is shown in
fig. 4.6.
700
650
600
550
500
450
400
350
300
Pump switch in position III (Factory setting)
250
200
150
Pump switch in position II
100
50
0 100 200 300 400 500 600
Fig. 4.6: Pump specifications 12-28 kW
14
Supplied By www.heating spares.co Tel. 0161 620 6677
Vessel Volume [L]
1.0 1.5
3.0
2.7 3.9
5.4 7.8
10.9 15.6
13.6 19.5
16.3 23.4
19.1 27.3
21.8 31.2
24.5 35.1
27.2 39.0
30.0 42.9
32.7 46.8
35.7 50.7
38.1 54.6
40.9 58.5
43.6 62.4
46.3 66.3
49.0 70.2
51.8 74.1
54.5 78.0
0.109 0.156
700 800 900 1000 1100 1200 1300 1400
Volume flow [l/hr]
700
650
600
550
500
450
400
350
300
Pump switch in position III (pre-delivery setting)
250
200
150
Pump switch in position II
100
50
0 100 200 300 400 500 600
Fig. 4.6: Pump specifications 37 kW

4.8.7 System by-pass

An automatic system by-pass is included within the
boiler. The boiler is suitable for use in systems with
thermostatic radiator valves and no additional by-pass is
required.

4.8.8 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.
Instructions for Installation and Servicing turboMAX plus and thermoCOMPACT R1
700 800 900 1000 1100 1200 1300 1400 1500 1600
Volume flow [l/min]
1700