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5790 733 - 07
Vitocrossal 300 CA3 Series 2.5 to 6.0 Installation/Service
Service
Filling the Heating System with Water and Ventilating
1. Fill Vitocrossal 300, CA3 with fully softened water.
2. Enter the fill quantity, water softness and pH-value in
the chart provided on page 221.
3. Before filling push the actuator release button and open
each isolation valve (located near the return header of
each boiler section).
4. When fill is complete push the actuator release button
and close each isolation valve (located near the return
header of each boiler section).
Filling Condensate Trap with Water
IMPORTANT
See page
221
for water quality requirements.
Checking the Type of Gas
IMPORTANT
The heating system is equipped for operation with natural
gas. Switching over to another type of gas is not possible.
1. The burners are factory set for operation with
natural gas.
2. Record gas type in record (on page 222).
1. Remove the siphon cup
A
and fill with water
(otherwise flue gas may escape).
2. Check that the condensate can drain freely.
3. Refit the siphon cup
A
.
Note:
The hose connection to the on-site condensate
system or to the neutralizing system must not
be permitted to sag; support hose where required.
Push
actuator
release
button
To close valve
Valve closed
To open valve
Push
actuator
release
button
Valve open
