Vaillant ecoTEC SERIES Instructions For Installation And Servicing

24 Instructions for installation and servicing ecoTEC 839592_12
4.12 Heating connection
Caution!
When making final connection to the boiler, if
using soldered fittings, extra care should be
taken to avoid damage to isolation valves
through heat transfer.
4.12.1 Heating flow and return connection
Note
Before connecting the heating circuit to the
boiler, all pipework and radiators must be
thoroughly flushed to remove any installation
debris.
ecoTEC plus combination boiler
10
11
12
13
9
8
7
6
1
2
3
4
5
Fig. 4.9 Installing the heating flow and return connection for
ecoTEC plus combination boiler
• Insert the seal (1) and fit the service valve (2) to the
return connection of the appliance.
• Insert the seal (10) and fit the service valve (9) to the
flow connection of the appliance.
• Install the O-ring seal (12) on the return valve (11).
Note
Lay the filling loop hose (13) above the
pipework elbows.
• Fit the union nuts (4) and (7) as well as the
compression olives (3) and (8) to the pre-bended
22 mm copper tails (5) and (6).
• Fully insert pipes (5) and (6) into the service valves.
Tighten the union nuts in this position.
• Fit the handle for the filling loop with a countersunk
screw to the service valve (9).
ecoTEC pro combination boiler
bar
1
2
3
4
5
Fig. 4.10 Heating flow and return connection for ecoTEC pro
combination boiler
• Insert a seal (1) and fit the service valves (2) to the
flow and return connection of the appliance.
• Fit a union nut (4) and a compression olive (3) to the
22 mm pre-bended copper tail (5).
• Fully insert pipe (5) into the service valve. Tighten the
union nuts in this position.
ecoTEC plus system boiler
1
2
3
4
5
Fig. 4.11 Heating-side flow and return connection for
ecoTEC plus system boiler
• Insert a seal (1) and fit the service valves (2) to the
flow and return connection of the appliance.
• Fit a union nut (4) and a compression olive (3) to the
22 mm pre-bended copper tail (5).
• Fully insert pipe (5) into the service valve. Tighten the
union nuts in this position.
4 Boiler installation sequence

Vaillant ecoTEC SERIES Specifications

General

Model	ecoTEC SERIES
ErP Rating	A
Mounting	Wall-mounted
Dimensions	Varies by model
Weight	Varies by model
Fuel Type	Natural gas or LPG
NOx Emissions	Class 5 (less than 56 mg/kWh)
Output Range	35kW