Vaillant auroTHERM VFK 900, Start-Up, Maintenance And Troubleshooting Manual

Page: 61 / 69

Manual - Solar hot water systems 0020009607_02 68
11 Start-up protocol
The solar system of:
has been started up, while taking the following points
into consideration:
1. Assembly O.K. Remarks
Roof bracket fixed according to instructions?
Solar pipework connected to potential equalisation?
Roof covering refixed according to instructions after laying the roof bracket?
Roof membrane not damaged?
All connecting clips pushed in (with tube collectors)?
Has the protective film been removed from the collectors?
Pressure release pipe installed at the expansion relief valve of the solar circuit?
Catch vessel (empty canister) placed under pressure release pipe?
Pressure release pipe installed at expansion relief valve on hot water side and connected to
waste water?
Thermostat mixer installed, temperature set and checked?
2. Start-up
System filled with prescribed solar fluid?
Solar circuit flushed with solar fluid?
Line strainer cleaned after flushing the system?
System bled several times?
Solar circuit subjected to hydraulic pressure test, including leak inspection of screw
connections and soldering points?
Stuffing boxes at stop valve and fill/vent valve checked for leaks (retighten union nuts if
necessary)?
Temperature and pressure relief valve checked?
Stop valve for reheating source installed (normally motorised 2 port valve)?
Flow rate set according to system manual?
Pump, cylinder heat exchanger and collector bled (gravity brake blocked for bleeding)?
Gravity brake released?
Fill/vent valve caps screwed tight?
Cylinder bled?
Heating circuit bled?
Does the system installation meet the requirements of the building regulations?
Has the system been installed and started up in accordance with the installation manuals
of the manufacturer?
3. Control systems
Do the temperature sensors display plausible values?
Solar pump running and circulating (flow rate measuring meter)?
Solar circuit and cylinder become warm?
The temperature difference between the flow and return is a max. of 10 to 14 °C
at full sunshine?
Correct hydraulic plan set (auroMATIC 560 only)?
4. Instruction
The system owner has been instructed as follows:
– Basic functions and operation of the solar control?
– Functions and operation of the reheating system?
– Frost protection of the system?
– Maintenance intervals?
– Manuals/documents (possibly with special circuit plan) handed over to the owner?
Table 11.1 Start-up protocol
11 Start-up protocol