19
Connecting to the heating system
Warning
The hot water heater must always be
fi lled and pressurised before the heat-
ing system is fi lled.
The installation must not, under any
circumstances, be switched on without
water.
Venting nipple (only Optima 600-1100)
Optima 600-1100
Filling the heating system
After fl ushing the heating system the hot water heater must be fi lled with
water. The heating system is then fi lled.
This is what to do:
1. Open and close the tap between the cold water system and the heating
system in short time intervals.
2. Read the pressure on the expansion tank pressure gauge.
3. Vent the system and refill to the correct pressure.
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