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5790 733 - 07
Vitocrossal 300 CA3 Series 2.5 to 6.0 Installation/Service
WARNING
Working on pressure loaded parts can be dangerous.
Connections around the heating water should only be
opened if the boiler is unpressurized.
CAUTION
Under-pressure in the boiler can lead to material
damages. Only empty boiler with open ventilation
with a suction pump.
IMPORTANT
Service
Cleaning of Condensate Drainage System
Checking Heating Water Connections for Leakage
Ensure that connections for control equipment and
minimum pressure monitor (low-water indicator) are also
leakage-free.
IMPORTANT
If the condensate does not drain freely, the condensate
will accumulate in the bottom part of the boiler, resulting
in burner shut-down (fault message).
Check neutralization unit
(if installed)
1. Check the pH value of the condensate with a pH
measuring strip (field supplied). If the pH value is less
than 6.5, replace granulate.
2. If contaminated - rinse the neutralization unit with
tap
water.
3. Add granulate as marked.
IMPORTANT
The granulate is consumed as it neutralizes the condensate.
The red marking indicates the minimum filling level.
See Neutralization Unit ”Installation Instructions”.
Checking the condensate drain and the neutralizing
system (if installed)
Add water to the flue gas collector through the inspection
port
E
.
Note:
The water must flow from the condensate drain
without back pressure.
If necessary, clean the condensate drain again.
Note:
Clean the inside of the condensate drain system
at least annually.
1. Pull drain or cleaning hose
D
off.
2. Clean the inside of the condensate drain system
(hose,
pipe).
3. Clean the neutralizing system (if installed) in
accordance with the manufacturer‘s instructions.
See Neutralization System Operating Instructions.
Note:
You can obtain the neutralizing granulate from
Viessmann.
4. Release and flush lower part
C
of siphon cup
B
.
5. Fill lower part
C
of siphon cup
B
with water and
reassemble.
6. Install hose
A
of the neutralizing system to the siphon.
