Reinstall Burner Tray; Inspect All Water Pipe Connections; Check Safety Devices; Check Precharged Expansion And Non-Diaphragm Tank And Pressure Of Heating System - Viessmann Vitogas 100 GS1 Series Start-Up/Service Instructions

Procedures
(continued)
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ervice
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nitial start-up ervice
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nitial start-up ervice
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nitial start-up ervice

12. Reinstall burner tray

13. Inspect all water pipe connections

14. Check safety devices

Ensure proper operation of low water
cut-off(s) (if applicable), pressure relief
valve, and pump(s).
Check pressure gage, air vent and
pressure relief valve. Ensure that
pressure relief valve does not leak and
that it operates in accordance with
information provided by the
manufacturer.
Refer to maintenance instructions
supplied with low water cut-offs,
pumps, etc.
Flush float water type low water
cut-offs (if used).
15. Check precharged expansion and non-diaphragm tank and pressure of system
Initial Start-up and Service
Check heating system and domestic hot
water connections. Ensure all
connections are pressure tight.
Correct any leaks found on fittings,
pumps, valves, etc..
Follow local regulations with respect to
backflow preventers.
If oil-lubricated pumps are used, ensure
proper lubrication.
If motorized zone valves are used, refer
to maintenance instructions provided
with zone valves.
Refer to maintenance instructions
supplied with diaphragm expansion tank.
Check fill pressure when system is cold.
Ensure proper operation of expansion
tank.
If an older non-diaphragm expansion
tank is used, ensure the correct water
level is present ( water,
2/3
The usual water fill pressure is between
10 and 15 psig with the system cold.
The system fill pressure value must be
equal to the expansion tank pressure
value at approx. 60 ºF/15.6 ºC.
Check pressure gage on safety
header. A lower pressure gage reading
usually indicates loss of water due to
leakage. All leaks must be corrected.
Refer to instructions packaged with
automatic fill valve.
air).
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