Initial Checks Before Turning On; Opening The Service Valves - Vaillant ecoTEC Instructions For Use Manual

4 Operation
4.3

Initial checks before turning on

4.3.1

Opening the service valves

ecoTEC plus and pro
Note
h
If a bottom cover is fitted to the boiler the
service valves are behind this cover.
4
3
Fig. 4.5 Opening the service valves on ecoTEC plus combina-
tion boilers
4
3
Fig. 4.6.1 Opening the service valves on ecoTEC system boilers
8
• Ensure that the service valves in the heating flow and
return (4 and 1) and the gas service valve (3) are
open. The flow, return and gas service valves are open
when the screwdriver slot is in the same direction as
the pipework.
• On ecoTEC combination boilers only:
Ensure the cold water service valve (2) is open. This
can be checked by opening a hot water tap and ensur-
ing water flows.
Caution
a
2
The pressure relief valve is provided for safety
1
reasons and must not be interfered with.
ecoTEC exclusive
3
90˚
1
Fig. 4.6.2 Opening the service valves on ecoTEC exclusive
• Ensure the cold water service valve (2) is open. This
1
can be checked by opening a hot water tap and ensur-
ing water flows.
• Ensure that the service valves in the heating flow and
return (4 and 3) and the gas service valve (1) are
open.
The flow, return and gas service valves are open when
the line marking has the same direction as the pipe.
Attention
a
The pressure relief valve is provided for safety
90˚
reasons and must not be interfered with.
Note
h
A bottom cover is fitted to the appliance. The
service valves are fitted behind this cover.
Instructions for use ecoTEC / 838402-05
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