Filling The Primary Circuit; Operating The Vaillant Boiler - Vaillant Vantage 120 Installation Instructions Manual

Vaillant Vantage 120/150/200

9.2 Filling the Primary Circuit

Note:
Do not use boiler pressure relief valve for ven-
ting purposes.
•
The complete primary C.H. system must be flushed
out with both cold and hot water. Fill and vent the
central heating system as detailed in the boiler instal-
lation instructions.
To assist with this operation set the manual override
lever on the 3 port diverter valve (fig. 9) to the
MANUAL position, and lock in this position by pushing
the lever into the valve head.
•
Vent air from the VANTAGE heating coil from the ven-
ting points (H, fig. 4).
•
Completely drain the CH system, then refill and vent.
•
Reset the lever on the 3 port valve to the "AUTO"
position by releasing the manual operating lever from
the valve head (pull outwards).
For commissioning purposes and to reduce the time
for the cylinder contents to reach temperature, set the
cylinder hot water thermostat knob to setting 3
(approx. 40 °C).
•
Operate the boiler as in section 9.3 until both the
cylinder has reached temperature and all radiators in
the system are hot. Then once again drain the
complete CH system to remove residues from the
pipework and refill and vent again as above.
•
Reset the manual operating lever on the 3 port valve
to the "AUTO" position once the system has been
refilled and vented.

9.3 Operating the Vaillant Boiler

•
Ensure the boiler mains switch is turned on.
•
Ensure that the programmer and thermostats are cal-
ling for heat.
•
Check that the boiler fires and heats the cylinder con-
tents and the radiators according to the DHW and
room thermostat settings.
•
Carry out the commissioning and testing procedures
detailed in the installation instructions supplied with
the Vaillant boiler.
•
Upon completion of the commissioning procedures,
set the DHW thermostat knob on the VANTAGE to set-
ting 5-6, approx. 60 °C, and set the back up immersi-
on heater (fig. 13) thermostat to 60 °C.
Commissioning 9
29