Heating; Water Heating (Only 800 Series); Final Flush Of The Heating System ("Hot") - Vaillant ecoTEC plus 612 Instructions For Installation And Servicing

Fig. 6.1 Function check

6.1.2 Heating

• Switch on the appliance.
• Make sure that there is a heating demand.
• Press "i" to activate the status indicator.
As soon as a heat demand is received, the appliance
runs through the status indicators "S. 1" to "S. 3", until
the appliance is running correctly in normal mode and
the display shows "S. 4".
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Fig. 6.2 Display indicator during heating mode

6.1.3 Water heating (only 800 series)

• Switch on the appliance.
• Fully open the hot water tap.
• Press "i" to activate the status indicator.
If the water heating is working correctly, the display
shows the following: "S.14".
Instructions for installation and servicing ecoTEC
Fig. 6.3 Display indicator during water heating

6.1.4 Final flush of the heating system ("hot")

• Operate the appliance until the appliance and the
• Check the heating system for leaks.
• Connect a hose to the drain valve located at the low-
• Shut off the appliance, open the drain valve and all
• Close the drain valve.
• Fill the heating system again with water as described
• Release water from the system until the system design
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• Refit the boiler casing (see Section 5.10).
• Only in ecoTEC plus appliances: Attach the bottom
• Carefully push the rear of the bottom cover upwards
Commissioning Part I 5
Commissioning Part II 6
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heating system are up to temperature.
est position of the heating system.
vent valves on the heating elements and allow the
water to flow out of the heating system and the heater
quickly and fully.
in Section 5.4.4.
pressure of 1.0 bar is attained. (The actual reading on
the digital pressure gauge should ideally be 0.5 bar
plus an additional pressure corresponding to the high-
est 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 instruc-
tions. Further information can be obtained from
Sentinel, Betz Dearborn Ltd., Tel: 0151 420 9595, or
Fernox, Alpha–Fry technologies. Tel: 0870 8700362.
cover to the boiler by sliding the front edge of the
cover into the lip at the bottom front edge of the
appliance chassis.
until the spring retaining clips engage at the side of
the appliance. It may be necessary to adapt the bot-
tom cover by removing the easy break sections.
pro
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