Pump Specifications; Circulating Pump; System By-Pass; Venting - Vaillant ecoTEC plus 612 Instructions For Installation And Servicing

3 General requirements

4 Boiler installation sequence

Initial system pressure (bar)
Pressure relief valve setting (bar)
Total water content of system litres
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
Table 3.5 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 resid-
ual pump discharge height depending on the by-pass
valve is shown in Fig. 3.10.
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
1. Step
100
0
0 200 400 600
Fig. 3.10 Pump specifications ecoTEC plus
only ecoTEC pro:
The circulating pump is included in the boiler. The eco-
TEC 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.
16
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
2. Step
800 1000 1200 1400 1600 1800
Volumeflow [ l/h ]
400
300
200
100
0
0 200 400 600
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 thermostat-
ic radiator valves and no additional by-pass is required.
The by-pass valve is adjustable, see section 5.8.

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) incor-
porating a water trap of 140 mm.
4 Boiler installation sequence
4.1

Transporting the appliance

Important:
With regards to the Manual Handling
Operations, 1992 Regulations, the following lift
operation exceeds the recommended weight for
a one man lift.
General recommendations when handling
Clear the route before attempting the lift.
Ensure safe lifting techniques are used – keep back
straight – bend using legs. Keep load as close to body as
possible. Do not twist – reposition feet instead. If 2 per-
sons performing lift, ensure co-ordinated movements
during lift. Avoid upper body/top heavy bending - do not
lean forward/sideways. Recommend wear suitable cut
resistant gloves with good grip to protect against sharp
edges and ensure good grip. Always use assistance if
required.
Removal of carton from delivery van
Recommend 2 person lift or 1 person with use of sack
truck. If 1 person is performing lift, straddle the load, tilt
and place carton into position on truck. Recommend
secure appliance onto truck with suitable straps. Ensure
Instructions for installation and servicing ecoTEC
800 1000 1200 1400 1600 1800
Volumeflow [ l/h ]