Vailant ecoTEC plus 937, Инструкция по установке и обслуживанию

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Installation and maintenance instructions ecoTEC plus 937 0020031552_06
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8.6 Checking filling pressure of the expansion
vessel of the shift load storage tank
i
This check need not be performed every year
– a check every three years is sufficient.
Close the stop valves of the hot water system.
Release the pressure from the appliance.
Release the screw on the top cover of the shift load
storage tank and remove the cover.
1
2
Fig. 8.13 Checking filling pressure of the expansion vessel of
the shift load storage tank
The expansion vessel ( 1 ) is freely accessible.
Unscrew the seal cap ( 2 ) from the expansion vessel.
Check that the internal pressure of the expansion
vessel is approx. 4 bar.If the pressure is less than
this, the vessel must be pumped up again using an air
pump.
Screw the seal cap (
2 ) back onto the expansion ves-
sel.
Re-fit the cover.
Re-pressurise the combi boiler and the hot water sys-
tem.
8.7 Re-commissioning the combination boiler
Carry out the electrical safety tests.
Switch on the electrical supply.
Turn the stop valves of the central heating on.
Carry out a function check of the combi boiler as
described earlier.
Check the gas flow rate as described earlier.
Check for water leaks.
Re-fit the front case. Make sure that the seal is good.
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8.8 Test mode
Always perform the following steps after performing
any maintenance work:
Commission the appliance in accordance with the
instructions in the relevant operating manual.
Check the appliance for gas and water leaks.
Check the entire air/flue gas system for leaks and
securely fixed.
Check ignition and even flame appearance of the
burner.
Check whether the heating system and the hot water
preparation is functioning.
Complete the Benchmark gas boiler commissioning
checklist in the rear section of these instructions.
Fig. 8.14 Function check
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Inspection and maintenance 8