Hot-Water Supply (Ecomax 800); Heating System; Final System Flush ("Hot"); Handing Over To The User - Vaillant ecoMAX SERIES Instructions For Installation And Servicing

6 Functional checks (commissioning part II)
6.1.2 Hot–water supply (ecoMAX 800)
• Switch the unit on.
• Fully open one of the hot water taps in the system.
• Press the "i" button
Status code "S.14" appears on the display to indicate
that the hot–water supply is functioning correctly.
Fig. 6.2 Hot–water supply display messages (ecoMAX 800)

6.1.3 Heating system

• Switch the unit on.
• Ensure that there is a heating demand.
• Press the "i" button.
Status code "S.4" appears on the display to indicate that
the heating system is functioning correctly.
Fig. 6.3 Heating mode display messages

6.1.4 Final system flush ("Hot")

• Turn on the boiler for central heating and allow the
boiler and system to reach temperature.
• Check that the heating system is watertight.
• Turn the boiler off and rapidly drain both boiler and
system while still hot
• Refill the system and release all air.
• Release water from the system until the system design
pressure of 1.0 bar is attained. (The actual reading on
the pressure gauge should ideally be 0.5 bar plus an
additional pressure corresponding to the highest point
of the system above the base of the boiler – 10 m head
equals an additional 1 bar reading on the pressure
gauge. The minimum pressure should not be less than
1 bar in any installation.) If the system is to be treated
with an inhibitor it should be applied at this stage in
accordance with the manufacturer's instructions.
Further information can be obtained from Sentinel,
Betz Dearborn Ltd., Tel: 0151 4951861, or Fernox,
Alpha–Fry technologies. Tel: 0870 6015000.
• Disconnect the temporary filling connection.
40 40
• Refit the boiler casing.
• Attach the bottom cover to the boiler by sliding the
front edge of the cover into the lip at the bottom front
edge of the appliance chassis.
• Carefully push the rear of the bottom cover upwards
until the spring retaining clips engage at the side of
the appliance. It may be necessary to apapt the bot-
tom cover by removing the easy break sections.

6.1.5 Handing over to the user

• Set the maximum radiator temperature control to the
desired setting.
• Set the maximum hot water temperature control to
the desired setting.
• Instruct the user in the safe and efficient operation of
the boiler, in particular the function of
–the boiler on/off control
–the maximum radiator temperature control
–the maximum hot water temperature control
(ecoMAX 800)
–the pressure gauge
• Show the user how to operate any external controls.
• Explain to the user the importance of having the boiler
regularly serviced by a competent servicing company.
To ensure regular servicing, it is strongly recommen-
ded that arrangements are made for a Maintenance
Agreement. Please contact Vaillant Service Solutions
(0870 6060 777) for further details.
• Record central heating operating pressure in the
Benchmark Log Book along with the heat input (kW)
and temperature difference between flow and return.
Failure to install and commission this appliance to the
manufacturers instructions may invaludate the war-
ranty (Note: This does not affect your statutory rights).
• Leave the users instructions, installation instructions
and log book with the user.
Danger:
Note that if the boiler is run with an empty con-
densate trap there is a danger that fumes might
escape. Into the room and cause poisoning. For
this reason, it is important to ensure that the
trap is topped up each time the unit is cleaned.
Instructions for installation and servicing ecoMAX